System Design
AT CoolingTowers are constructed of heavy duty materials
and are designed for superior performance providing long,
trouble-free operation. However, proper equipment selection,
installation and maintenance are necessary to ensure
optimum unit performance. Several of the major considerations
when designing and operating a cooling tower
installation are presented in the following paragraphs.
For additional information, contact your local EVAPCO representative.
Air Circulation
The location of a cooling tower is an important consideration
when reviewing system design. Since cooling towers
use large quantities of air, adequate spacing around the
unit is necessary for it to perform properly. The best place
to locate any cooling tower is on a roof or at ground level
away from walls and other obstructions. Cooling towers
that are located in wells, enclosures, or are adjacent to
high walls must be properly located to avoid the effects of
recirculation. Recirculation occurs when some of the hot
moist discharge air leaving the cooling tower flows back
into the fresh air inlet. When recirculation causes the inlet
wet bulb temperature to the cooling tower to be
increased, the capacity of the cooling tower is decreased.
Refer to EVAPCO Bulletin 311, Equipment Layout Manual,
for the recommended layout guidelines for cooling towers.
Maintaining the Recirculated Water System
A cooling tower removes heat by evaporating a portion of
the recirculated spray water. As a general rule, a cooling
tower evaporates 1.58 l/h per 1 kW of cooling capacity. As
this water evaporates, it leaves behind all of its mineral
content and impurities. Therefore, it is important to bleed
an amount equal to that which is evaporated to prevent
the buildup of impurities. If this is not done, the mineral
content in the water will increase until the solids eventually
deposit in the unit, causing heavy scaling. The bleed line
should be installed in the external piping of the unit. It
must be properly sized for the application and be provided
with a metering valve and flow measurement device to
allow for field adjustment of the bleed rate.
Water Treatment
EVAPCO recommends that all cooling tower users should
consult with a reputable water treatment company familiar
with local water conditions in order to determine the
extent and type of water treatment program recommended
for each specific application. Any chemical water treatment
used must be compatible with the galvanized construction
of the unit. If acid is used for treatment, it
should be accurately metered and the concentration properly
controlled. The pH of the water should be maintained
between 6.5 and 8.0. In order to prevent “white rust”, the
galvanized steel in the unit may require routine passivation
of the steel when the system is operating in the higher pH
levels.
Batch chemical feeding is not recommended because it
does not afford the proper degree of control. If acid cleaning
is required extreme caution must be exercised and only
inhibited acids compatible with galvanized steel construction
should be used. Consult EVAPCO’s Maintenance
Bulletin 112 for additional information.
Capacity Control
The design wet bulb temperature for which a cooling
tower is sized occurs only a small percentage of the time.
Since the wet bulb temperature is lower than design much
of the time, and cooling loads tend to fluctuate, some
form of capacity control will be required. The simplest
form of capacity control is to cycle the fans on and off.
However, this type of control results in larger temperature
differentials and does not provide close control of the leaving
water temperature.
A better method of capacity control is to use two speed
fan motors, which adds a second step of control. Two
speed motors are an excellent method of capacity control
for the AT Cooling Tower. This arrangement gives capacity
steps of 10% (fans off), 60% (Fans at half speed) and
100%.
Two speed motors also reduce operating costs. At half
speed, the motor draws approximately 15% of the full load
power. Since the maximum wet bulb temperature and
maximum load very seldom coincide, the cooling tower will
actually operate at half speed about 80% of the time.
Therefore, power costs will be reduced by 85% during the
major portion of the year.
A third advantage of two speed motors is that noise levels
are reduced by approximately 6 dB(A) when operating at
half speed. Since both the load and wet bulb temperature
are normally lower at night, the sound generated by the
cooling tower will be substantially reduced during the
most noise sensitive time period.
For multiple cell units, both fan cycling and two speed
motors can be used to provide additional steps of control.
The combination of fan cycling and two speed motors
offers a simple and inexpensive means of controlling unit
capacity along with substantially reducing the energy costs
of the cooling tower.
Piping
Cooling tower piping should be designed and installed in
accordance with generally accepted engineering practices.
All piping should be supported by properly designing
hangers and supports with allowances made for possible
expansion and contraction of the piping system. No external
loads should be placed on the cooling tower connections.
Do NOT anchor any of the piping supports to the
cooling tower or its framework.
Control of Biological Contamination
Water quality should be checked regularly for biological
contamination. If biological contamination is detected, a
more aggressive water treatment and mechanical cleaning
program should be undertaken. The water treatment program
should be performed by a qualified water treatment
company. It is important that all internal surfaces be kept
clean of accumulated dirt and sludge. In addition, the drift
eliminators should be checked periodically to ensure that
they are clean and have not been damaged.
Note: The location of the cooling tower must be considered
during the equipment layout stages of a project. It is
important to prevent the discharge air (potential of biological
contamination) from being introduced into the
fresh air intakes of the building.
3
4
A
Advanced Technology Low Sound Solutions
The NEW AT Cooling Tower is now available with four (4) equipment
options to reduce the overall sound generated from the
side or top of the AT Cooling Tower. Each option provides various
levels of sound reduction and can be used in combination to
provide the lowest sound level. Consult EVAPCO’s EVAPSPEC or
ES II selection program for unit sound levels. If a detailed analysis
or full octave band data sheet is required for your application,
please consult your EVAPCO Sales Representative.
NOTE: These low sound options may impact the overall
installed dimensions of the AT Cooling Tower selected.
Super Low Sound Fan 9–15 dB(A) Reduction versus Standard Fan!
The Super Low Sound Fan offered by EVAPCO utilizes an extremely
wide chord blade design available for sound sensitive applications
where the lowest sound levels are desired. The fan is onepiece
molded heavy duty FRP construction utilizing a forward
swept blade design. The Super Low Sound fan is capable of
reducing the unit sound pressure levels 9 dB(A) to 15 dB(A),
depending on specific unit selection and measurement location.
The fans are high efficiency axial propeller type and operate with
no loss of thermal performance.
The Super Low Sound Fan is available on all 2.4m wide AT Cooling
Towers, ATW Closed Circuit Coolers and ATC Evaporative
Condensers.
Low Sound Fan 4–7 dB(A) Reduction!
The Low Sound Fan offered by EVAPCO is a wide chord blade design
available for sound sensitive applications where low sound levels are
desired. It is aluminum blade construction with a steel fan hub. The
Low Sound Fan is capable of reducing the unit sound pressure levels
4 dB(A) to 7 dB(A), depending on specific unit selection and
measurement location. The fans are high efficiency axial propeller
type and operate with no loss of thermal performance.
The Low Sound Fan is available on 3.6m wide AT Cooling Towers,
ATW Closed Circuit Coolers and ATC Evaporative Condensers.
AT Fan Discharge Sound Attenuation Up to 10 dB(A) Reduction!
The AT Fan Discharge Attenuator offered by EVAPCO is an additional
option available to further reduce the sound level of the
unit. The attenuator can be used with the standard AT fan or in
combination with the Low Sound Fan option.
The discharge attenuator is a factory assembled straight sided discharge
hood designed to reduce overall discharge sound levels at
full fan speed 5 dB(A) to 10 dB(A), depending on specific unit
selection and measurement location. It is constructed of Z-725 galvanized
steel as standard (options available for Type 304 stainless
steel) and includes insulated walls
(depending on water loading and louver
height) measured 1.5m from the side or end of the unit when
water is circulated with fans off.
The water silencers are constructed of lightweight PVC sections
and can be easily removed for access to the basin area. The water
silencer will have no impact on unit thermal performance.
Consult EVAPCO’s Advanced Technology Low Sound
Solutions Bulletin No. 650-EU for detailed product and specification
information.
Freecooling
Freecooling is when chilled water is produced by the cooling
tower without the use of a mechanical chiller during low ambient
conditions. The freecooling or economizer mode of an air
conditioning system is used to save cost per kWH when the conditions
allow the water in the tower to be cooled to “chiller” like
temperatures, typically 5.5°C–7°C LWT.
EVAPCO’s counterflow cooling towers are well suited for free
cooling applications. The counterflow fill design helps prevent
ice formation with its even temperature gradient through the fill
section and enclosed location blocking it from the elements.
However, special caution must be taken when selecting, sizing
and operating a cooling tower during normal winter or severe
winter applications.
Please consult EVAPCO’s Engineering Bulletin on Free Cooling
Operation of Open Cooling Towers or EVAPCO to assist in selecting
a tower for a freecooling application.
High Temperature Applications
EVAPCO’s AT Cooling Tower as standard is capable of handling
up to 55°C entering water temperature, which is higher than
most crossflow cooling tower fill sheets. It will not deform or
degrade at a continuous temperature application of 55°C.
However, there are applications where a higher temperature
rated fill is required. For these applications, a fill material is
available as an option which allows the entering water temperature
to operate at a continuous 65°C.
Please consult the factory for selections of high temperature fill
Cooling Towers.
Dirty Water Applications
The fill used in the AT Cooling Tower is designed to operate in
almost all cooling water applications. However, there are some
“dirty” water applications where the standard fill spacing is not
adequate, such as a pulp and paper mill cooling tower or other
application where heavy particulate will be mixed in with the
water.
For additional information, contact your local EVAPCO representative.
Alternate AT Arrangements
The AT Cooling Tower will fit almost every application. However,
there are installations with special piping locations or existing
steel that will require the AT to be modified to fit the layout.
Please contact the factory and we will develop a design to fit
your need.
Special Applications of the AT Cooling Tower
The standard AT Cooling Tower is suitable for the majority of air conditioning and industrial cooling applications. However, there are
some design situations where special consideration must be given with regard to materials of construction, thermal performance,
sound level and water quality. Some of these special applications are described below.
Consult the Factory
• Layout Guidelines
• Bypass Connection Sizing and Location
• Equalizer Connection Sizing and Location
• Remote Sump Connection Sizing and Location
• Field Thermal Performance Tests
• Seismic and Wind Load Application
• Operating and Maintenance Questions
• Ladders, Platforms and Motor Davits
5
Electric Heaters
Electric immersion heaters are available factory installed
in the basin of the cooling tower. They are sized to
maintain a +4 or
+5°C pan water
temperature with
the fans off and an
ambient air temperature
of -18°C.
They are furnished
with a combination
thermostat/low
water protection
device to cycle the
heater on when
required and to prevent the heater elements from energizing
unless they are completely submerged. All components
are in weather proof enclosures for outdoor use.
The heater power contactors and electric wiring are not
included as standard.
Electric Water Level Control
EVAPCO cooling towers are
available with an optional
electric water level control
system in place of the standard
mechanical makeup
valve and float assembly.
This package provides very
accurate control for the
basin water level and does
not require field adjustment, even under varying operating
conditions.
The control was designed by EVAPCO and is manufactured
exclusively for EVAPCO. It consists of multiple
heavy duty stainless steel electrodes. These electrodes
are mounted external to the unit in a vertical stand
pipe. For winter operation, the stand pipe must be
wrapped with electric heating cable and insulated to
protect it from freezing.
The weather protected slow closing solenoid valve(s) for
the makeup water connection is factory supplied and is
ready for piping to a water supply with a pressure
between 140 and 340 kPa.
Stainless Steel Water Touch Basin
The AT Cooling Tower has a modular design which
allows specific areas to be enhanced for increased corrosion
protection. The basin area of the cooling tower
experiences turbulent mixing of air and water, in addition
to silt build-up. In conjunction with the EVAPCOAT
Corrosion Protection System, EVAPCO offers an optional
Stainless Steel Water Touch Basin. This option provides
Type 304 or Type 316 stainless steel for the entire basin
area including the support columns of the cooling tower
and the louver frames. The basin section provides the
structural support for the unit and is the most important
part of the cooling tower. The Stainless Steel Water
Touch Basin provides maximum corrosion protection.
Other Options
• Hot Water or Steam Coils
• Steam Injectors
• Bottom Suction Connections
• Vibration Isolators (single cell only)
• Vibration Switches
• Remote Sump Connections
• Concrete Basin (By Others) Cooling Tower Option
(Type B and C)
Optional Equipment for the AT Cooling Tower
The standard design of the NEW EVAPCO AT provides the customer with the easiest cooling tower to maintain in the
industry. There are additional options which can make maintenance easier and extend the life of the cooling tower.
These options are listed below.
O P T I O N A L E Q U I P M E
(depending on water loading and louver
height) measured 1.5m from the side or end of the unit when
water is circulated with fans off.
The water silencers are constructed of lightweight PVC sections
and can be easily removed for access to the basin area. The water
silencer will have no impact on unit thermal performance.
Consult EVAPCO’s Advanced Technology Low Sound
Solutions Bulletin No. 650-EU for detailed product and specification
information.
Freecooling
Freecooling is when chilled water is produced by the cooling
tower without the use of a mechanical chiller during low ambient
conditions. The freecooling or economizer mode of an air
conditioning system is used to save cost per kWH when the conditions
allow the water in the tower to be cooled to “chiller” like
temperatures, typically 5.5°C–7°C LWT.
EVAPCO’s counterflow cooling towers are well suited for free
cooling applications. The counterflow fill design helps prevent
ice formation with its even temperature gradient through the fill
section and enclosed location blocking it from the elements.
However, special caution must be taken when selecting, sizing
and operating a cooling tower during normal winter or severe
winter applications.
Please consult EVAPCO’s Engineering Bulletin on Free Cooling
Operation of Open Cooling Towers or EVAPCO to assist in selecting
a tower for a freecooling application.
High Temperature Applications
EVAPCO’s AT Cooling Tower as standard is capable of handling
up to 55°C entering water temperature, which is higher than
most crossflow cooling tower fill sheets. It will not deform or
degrade at a continuous temperature application of 55°C.
However, there are applications where a higher temperature
rated fill is required. For these applications, a fill material is
available as an option which allows the entering water temperature
to operate at a continuous 65°C.
Please consult the factory for selections of high temperature fill
Cooling Towers.
Dirty Water Applications
The fill used in the AT Cooling Tower is designed to operate in
almost all cooling water applications. However, there are some
“dirty” water applications where the standard fill spacing is not
adequate, such as a pulp and paper mill cooling tower or other
application where heavy particulate will be mixed in with the
water.
For additional information, contact your local EVAPCO representative.
Alternate AT Arrangements
The AT Cooling Tower will fit almost every application. However,
there are installations with special piping locations or existing
steel that will require the AT to be modified to fit the layout.
Please contact the factory and we will develop a design to fit
your need.
Special Applications of the AT Cooling Tower
The standard AT Cooling Tower is suitable for the majority of air conditioning and industrial cooling applications. However, there are
some design situations where special consideration must be given with regard to materials of construction, thermal performance,
sound level and water quality. Some of these special applications are described below.
Consult the Factory
• Layout Guidelines
• Bypass Connection Sizing and Location
• Equalizer Connection Sizing and Location
• Remote Sump Connection Sizing and Location
• Field Thermal Performance Tests
• Seismic and Wind Load Application
• Operating and Maintenance Questions
• Ladders, Platforms and Motor Davits
5
Electric Heaters
Electric immersion heaters are available factory installed
in the basin of the cooling tower. They are sized to
maintain a +4 or
+5°C pan water
temperature with
the fans off and an
ambient air temperature
of -18°C.
They are furnished
with a combination
thermostat/low
water protection
device to cycle the
heater on when
required and to prevent the heater elements from energizing
unless they are completely submerged. All components
are in weather proof enclosures for outdoor use.
The heater power contactors and electric wiring are not
included as standard.
Electric Water Level Control
EVAPCO cooling towers are
available with an optional
electric water level control
system in place of the standard
mechanical makeup
valve and float assembly.
This package provides very
accurate control for the
basin water level and does
not require field adjustment, even under varying operating
conditions.
The control was designed by EVAPCO and is manufactured
exclusively for EVAPCO. It consists of multiple
heavy duty stainless steel electrodes. These electrodes
are mounted external to the unit in a vertical stand
pipe. For winter operation, the stand pipe must be
wrapped with electric heating cable and insulated to
protect it from freezing.
The weather protected slow closing solenoid valve(s) for
the makeup water connection is factory supplied and is
ready for piping to a water supply with a pressure
between 140 and 340 kPa.
Stainless Steel Water Touch Basin
The AT Cooling Tower has a modular design which
allows specific areas to be enhanced for increased corrosion
protection. The basin area of the cooling tower
experiences turbulent mixing of air and water, in addition
to silt build-up. In conjunction with the EVAPCOAT
Corrosion Protection System, EVAPCO offers an optional
Stainless Steel Water Touch Basin. This option provides
Type 304 or Type 316 stainless steel for the entire basin
area including the support columns of the cooling tower
and the louver frames. The basin section provides the
structural support for the unit and is the most important
part of the cooling tower. The Stainless Steel Water
Touch Basin provides maximum corrosion protection.
Other Options
• Hot Water or Steam Coils
• Steam Injectors
• Bottom Suction Connections
• Vibration Isolators (single cell only)
• Vibration Switches
• Remote Sump Connections
• Concrete Basin (By Others) Cooling Tower Option
(Type B and C)
Optional Equipment for the AT Cooling Tower
The standard design of the NEW EVAPCO AT provides the customer with the easiest cooling tower to maintain in the
industry. There are additional options which can make maintenance easier and extend the life of the cooling tower.
These options are listed below.
Optional Equipment for the AT Cooling Tower
The standard design of the NEW EVAPCO AT provides the customer with the easiest cooling tower to maintain in the
industry. There are additional options which can make maintenance easier and extend the life of the cooling tower.
Electric Heaters
Electric immersion heaters are available factory installed
in the basin of the cooling tower. They are sized to
maintain a +4 or
+5°C pan water
temperature with
the fans off and an
ambient air temperature
of -18°C.
They are furnished
with a combination
thermostat/low
water protection
device to cycle the
heater on when
required and to prevent the heater elements from energizing
unless they are completely submerged. All components
are in weather proof enclosures for outdoor use.
The heater power contactors and electric wiring are not
included as standard.
Electric Water Level Control
EVAPCO cooling towers are
available with an optional
electric water level control
system in place of the standard
mechanical makeup
valve and float assembly.
This package provides very
accurate control for the
basin water level and does
not require field adjustment, even under varying operating
conditions.
The control was designed by EVAPCO and is manufactured
exclusively for EVAPCO. It consists of multiple
heavy duty stainless steel electrodes. These electrodes
are mounted external to the unit in a vertical stand
pipe. For winter operation, the stand pipe must be
wrapped with electric heating cable and insulated to
protect it from freezing.
The weather protected slow closing solenoid valve(s) for
the makeup water connection is factory supplied and is
ready for piping to a water supply with a pressure
between 140 and 340 kPa.
Stainless Steel Water Touch Basin
The AT Cooling Tower has a modular design which
allows specific areas to be enhanced for increased corrosion
protection. The basin area of the cooling tower
experiences turbulent mixing of air and water, in addition
to silt build-up. In conjunction with the EVAPCOAT
Corrosion Protection System, EVAPCO offers an optional
Stainless Steel Water Touch Basin. This option provides
Type 304 or Type 316 stainless steel for the entire basin
area including the support columns of the cooling tower
and the louver frames. The basin section provides the
structural support for the unit and is the most important
part of the cooling tower. The Stainless Steel Water
Touch Basin provides maximum corrosion protection.
Other Options
• Hot Water or Steam Coils
• Steam Injectors
• Bottom Suction Connections
• Vibration Isolators (single cell only)
• Vibration Switches
• Remote Sump Connections
• Concrete Basin (By Others) Cooling Tower Option
(Type B and C)
Optional Equipment for the AT Cooling Tower
The standard design of the NEW EVAPCO AT provides the customer with the easiest cooling tower to maintain in the
industry. There are additional options which can make maintenance easier and extend the life of the cooling tower.
These options are listed below.
O P T I O N A L E Q U I P M E N T
AT Heater Sizes
AT models -18°C -29°C -40°C
kW kW kW
AT 19-56 to 96 5 7 9
19-28 to 98 6 8 12
18-49 to 99 6 9 12
18-511 to 911 7 10 15
18-312 to 912 2 x 4 2 x 6 2 x 8
18-214 to 914 2 x 5 2 x 7 2 x 9
28-518 to 918 2 x 6 2 x 9 2 x 12
28-521 to 921 2 x 7 2 x 10 2 x 15
28-524 to 924 4 x 4 4 x 6 4 x 8
28-428 to 928 4 x 5 4 x 7 4 x 9
38-236 to 936 6 x 4 6 x 6 6 x 8
38-442 to 942 6 x 5 6 x 7 6 x 9
112-012 to 912 2 x 6 2 x 9 2 x 12
112-314 to 914 2 x 7 2 x 10 2 x 15
112-018 to 918 2 x 9 2 x 15 2 x 18
112-520 to 920 2 x 10 2 x 15 3 x 15
212-024 to 924 4 x 6 4 x 9 4 x 12
212-128 to 928 4 x 7 4 x 10 4 x 15
212-036 to 936 4 x 9 4 x 15 4 x 18
312-036 to 936 6 x 6 6 x 9 6 x 12
312-042 to 942 6 x 7 6 x 10 6 x 15
312-054 to 954 6 x 9 6 x 15 6 x 18
312-260 to 960 6 x 10 6 x 15 9 x 15
224-018 to 918 4 x 9 4 x 15 4 x 18
424-024 to 924 4 x 12 4 x 18 6 x 15
424-036 to 936 4 x 18 6 x 18 8 x 18
6
C
Cooling capacity in l/s
EWT 32 36 32 36 32 36 32 37 35 40 35 40 35 37 40 42 36 37 41 42
MODEL LWT 27 26 27 26 27 26 27 27 30 30 30 30 30 32 30 32 31 32 31 32
NO. WB 19 19 20 20 21 21 22 22 24 24 25 25 26 26 26 26 27 27 27 27
AT 19 - 56 31 17 29 15 26 14 23 14 30 19 27 17 23 33 15 22 24 30 16 20
AT 19 - 66 34 19 32 17 28 15 25 16 33 21 29 19 25 36 17 24 27 32 18 22
AT 19 - 76 37 22 34 20 31 18 28 19 36 24 32 22 28 39 20 27 30 35 21 24
AT 19 - 86 40 24 37 22 34 20 30 21 39 26 35 24 31 42 22 29 32 38 23 27
AT 19 - 96 45 28 42 26 38 24 35 25 44 30 40 28 35 47 25 33 36 43 27 31
AT 19 - 28 38 21 35 19 32 16 28 17 37 23 33 21 28 41 18 26 30 36 19 24
AT 19 - 38 41 23 38 21 34 18 30 19 40 26 35 23 31 44 20 29 32 39 21 26
AT 19 - 48 44 25 41 22 37 20 32 21 42 28 38 25 33 46 22 31 35 42 23 28
AT 19 - 58 44 26 41 24 38 21 33 22 43 29 39 26 34 47 23 32 35 42 24 29
AT 19 - 68 48 28 44 26 41 23 36 25 46 31 42 29 37 50 25 35 38 46 27 32
AT 19 - 78 49 30 46 28 42 26 38 27 47 33 43 31 38 51 27 36 40 47 29 33
AT 19 - 88 52 32 49 29 44 26 40 27 50 35 46 32 40 55 28 38 42 50 30 35
AT 19 - 98 54 34 51 31 46 29 42 30 52 37 48 34 42 57 31 40 44 52 32 37
AT 18 - 49 51 30 47 27 43 25 38 26 49 33 44 30 39 53 27 37 41 48 28 34
AT 18 - 59 53 30 49 28 45 25 40 26 51 34 46 31 40 56 27 38 42 51 29 34
AT 18 - 69 58 35 54 32 49 29 44 30 56 38 51 35 45 60 31 42 46 55 33 39
AT 18 - 79 59 37 55 34 50 31 45 33 57 40 52 37 46 62 33 44 48 57 35 40
AT 18 - 89 62 38 58 35 53 32 47 33 60 41 54 38 48 65 34 45 50 59 36 42
AT 18 - 99 64 40 60 37 55 34 49 35 62 43 56 40 50 N.A. 36 47 52 61 38 44
AT 18 - 511 58 34 53 31 49 28 43 29 55 37 50 34 44 60 30 41 46 55 32 38
AT 18 - 611 66 38 61 35 55 31 49 33 63 42 57 38 50 69 34 47 52 63 36 43
AT 18 - 711 67 42 63 39 57 35 51 37 65 45 59 42 52 70 38 49 54 64 39 46
AT 18 - 811 71 43 66 40 60 36 54 38 68 47 62 43 55 74 39 52 57 68 41 48
AT 18 - 911 73 45 68 42 62 39 56 40 71 49 64 46 57 77 41 54 59 70 43 50
AT 18 - 312 64 37 59 34 54 30 48 32 62 41 56 38 49 67 33 46 51 61 35 42
AT 18 - 412 68 42 63 38 58 35 52 37 65 45 59 42 52 71 38 50 54 64 39 46
AT 18 - 512 73 42 68 38 62 34 55 36 71 47 64 42 55 77 37 52 58 70 39 47
AT 18 - 612 79 48 73 44 67 40 60 42 76 52 69 48 61 83 43 58 63 75 45 53
AT 18 - 712 82 51 76 47 70 43 63 45 79 55 72 51 64 86 46 60 66 78 48 56
AT 18 - 812 83 51 78 47 71 42 64 44 80 56 73 51 64 87 46 61 67 79 48 56
AT 18 - 912 86 54 80 50 74 46 66 48 83 58 76 54 67 N.A. 49 63 70 82 51 59
AT 18 - 214 78 46 73 42 66 38 59 40 75 51 68 46 60 82 41 56 62 75 43 52
AT 18 - 314 82 51 76 47 70 43 63 45 79 55 72 51 63 86 46 60 66 78 48 56
AT 18 - 414 86 49 80 45 72 40 64 42 83 55 74 50 65 90 44 61 68 82 46 55
AT 18 - 514 86 51 80 47 73 42 65 45 82 56 75 52 66 90 46 62 69 82 48 57
AT 18 - 614 90 55 83 51 76 47 69 49 86 60 78 56 69 94 50 66 72 85 52 61
AT 18 - 714 92 56 86 51 78 46 70 49 89 61 81 56 71 97 50 67 74 88 53 62
AT 18 - 814 96 58 89 54 82 49 73 51 92 64 84 59 74 100 53 70 77 91 55 65
AT 18 - 914 100 62 93 58 85 53 77 55 96 67 87 62 77 N.A. 56 73 81 95 59 68
AT 28 - 518 98 60 91 56 84 51 75 53 95 66 86 61 76 103 55 72 79 94 57 67
AT 28 - 618 108 61 100 56 90 50 80 53 103 68 93 62 81 113 54 76 85 102 57 69
AT 28 - 718 117 70 109 65 99 58 89 61 112 77 102 71 90 122 63 85 94 111 66 78
AT 28 - 818 126 77 117 71 107 64 96 67 121 84 110 77 97 132 69 92 101 120 72 85
AT 28 - 918 130 80 121 75 110 68 99 71 125 87 114 81 100 N.A. 73 95 105 124 76 88
AT 28 - 521 116 68 108 62 98 56 87 59 112 75 101 69 89 122 61 83 92 111 64 76
AT 28 - 621 120 74 112 69 103 62 92 65 116 81 105 75 93 126 67 88 97 115 70 82
AT 28 - 721 133 77 123 70 112 62 99 66 128 85 115 77 101 139 68 94 105 126 72 86
AT 28 - 821 143 87 133 80 122 72 109 76 138 95 125 88 111 150 78 105 115 136 82 97
AT 28 - 921 148 92 138 85 126 78 113 81 143 100 130 92 115 155 84 109 119 141 87 101
AT 28 - 524 135 83 126 77 115 70 103 73 130 91 118 84 105 142 75 99 109 129 79 92
AT 28 - 624 147 84 136 77 124 69 109 72 141 93 127 85 111 154 75 104 116 140 79 95
AT 28 - 724 158 95 147 88 134 79 120 83 152 105 138 96 122 165 86 115 127 150 90 106
AT 28 - 824 166 102 155 94 142 85 127 89 160 111 146 102 129 174 92 122 134 159 96 113
AT 28 - 924 173 107 161 100 147 91 132 95 166 116 151 108 134 N.A. 98 127 139 165 102 118
AT 28 - 428 156 92 145 84 132 75 118 79 151 102 136 93 119 164 82 112 125 149 86 103
AT 28 - 528 172 99 159 90 145 80 128 85 165 109 149 99 130 180 88 122 136 163 92 111
AT 28 - 628 184 112 172 103 157 93 141 97 178 122 161 112 142 193 100 135 148 176 105 124
AT 28 - 728 192 117 179 108 163 97 146 102 185 128 168 118 148 201 105 140 154 183 110 129
AT 28 - 828 192 119 179 110 163 101 147 105 185 129 168 120 149 201 108 141 155 183 113 131
AT 28 - 928 200 124 186 115 170 106 153 110 193 134 175 125 155 N.A. 113 147 161 191 117 136
Note: For alternate selections and conditions other than those stated, consult your EVAPSPEC II selection program or local EVAPCO representative.
7
C O
Cooling capacity in l/s
EWT 32 36 32 36 32 36 32 37 35 40 35 40 35 37 40 42 36 37 41 42
MODEL LWT 27 26 27 26 27 26 27 27 30 30 30 30 30 32 30 32 31 32 31 32
NO. WB 19 19 20 20 21 21 22 22 24 24 25 25 26 26 26 26 27 27 27 27
AT 38 - 236 179 98 165 88 148 77 129 83 171 109 153 99 131 188 86 123 138 169 91 111
AT 38 - 336 192 112 178 102 162 91 144 96 185 124 167 113 146 201 100 137 153 183 105 126
AT 38 - 436 203 125 189 115 173 105 155 110 195 136 177 125 157 212 113 149 163 193 118 138
AT 38 - 536 220 126 204 115 185 103 164 108 212 140 191 127 166 231 112 156 174 209 118 142
AT 38 - 636 216 129 201 118 183 106 164 112 208 142 188 130 166 226 115 156 173 206 121 144
AT 38 - 736 236 143 220 132 201 119 180 125 228 157 207 144 183 248 129 173 190 226 135 159
AT 38 - 836 250 152 233 140 213 127 191 133 240 167 219 153 193 262 137 183 201 238 144 169
AT 38 - 936 259 161 241 149 221 137 198 143 250 174 227 162 201 N.A. 146 190 209 247 152 176
AT 38 - 442 222 136 207 126 189 114 170 120 214 148 194 137 172 233 123 163 179 212 128 150
AT 38 - 542 257 148 239 135 217 120 192 127 248 164 223 149 195 270 131 182 204 245 139 166
AT 38 - 642 276 167 258 154 235 139 211 146 266 184 242 169 214 290 151 202 223 264 158 186
AT 38 - 742 288 175 268 161 245 146 220 153 277 192 252 176 222 301 158 210 232 274 165 194
AT 38 - 842 288 178 268 166 245 152 220 158 277 194 252 179 223 302 162 211 232 275 169 196
AT 38 - 942 300 186 279 173 255 158 230 165 289 202 262 187 232 N.A. 169 220 242 286 176 204
AT 112 -012 93 51 86 46 77 41 68 43 89 57 80 52 69 98 45 64 72 88 48 58
AT 112 -112 101 57 93 51 84 45 74 48 97 63 87 57 75 106 50 70 79 96 53 64
AT 112 -212 107 61 100 56 90 49 80 52 103 68 93 62 81 113 54 76 85 102 57 69
AT 112 -312 108 64 100 59 91 53 82 55 104 71 94 65 83 113 57 78 86 103 60 72
AT 112 -412 113 65 105 59 95 53 84 56 109 72 98 66 85 119 58 80 89 108 61 73
AT 112 -512 111 68 103 63 94 58 85 60 107 74 97 69 86 116 62 81 89 106 65 75
AT 112 -612 115 70 108 64 98 58 88 60 111 76 101 70 89 121 62 84 93 110 65 77
AT 112 -712 122 74 114 68 104 62 93 65 118 81 107 75 94 128 67 89 98 117 70 82
AT 112 -812 127 79 118 73 108 67 97 70 122 85 111 79 98 133 72 93 102 121 75 86
AT 112 -912 136 84 127 78 116 72 104 75 131 91 119 85 105 N.A. 77 100 110 130 80 93
AT 112 - 314 124 70 115 64 104 57 92 60 119 78 107 71 93 130 62 87 97 118 66 79
AT 112 - 414 126 75 117 69 107 62 95 65 121 82 110 75 96 132 67 91 101 120 70 84
AT 112 - 514 130 80 121 74 111 68 99 71 125 87 114 81 101 136 73 95 105 124 76 88
AT 112 - 614 133 80 124 74 113 66 101 70 128 88 117 81 103 140 72 97 107 127 75 89
AT 112 - 714 138 85 129 79 118 72 106 76 133 93 121 86 107 145 78 101 111 132 81 94
AT 112 - 814 145 88 135 81 124 74 111 77 140 97 127 89 112 152 80 106 117 139 83 98
AT 112 - 914 151 94 141 87 129 80 116 83 146 102 132 94 117 159 85 111 122 144 89 103
AT 112 - 018 146 81 135 73 122 65 107 69 140 91 126 82 108 154 71 101 114 139 76 92
AT 112 - 118 153 86 142 78 128 69 113 73 147 96 132 87 114 161 76 107 120 146 80 97
AT 112 - 218 156 92 145 84 132 75 117 79 150 101 136 93 119 163 82 112 124 149 86 103
AT 112 - 318 164 98 153 90 139 80 124 84 158 107 143 98 126 172 87 118 131 156 92 109
AT 112 - 418 169 104 157 97 144 88 129 92 163 113 148 105 131 177 95 124 136 161 99 115
AT 112 - 518 179 108 167 100 153 90 137 94 173 119 157 109 138 188 97 131 144 171 102 120
AT 112 - 618 186 115 173 107 158 98 142 102 179 125 162 116 144 195 105 136 150 177 109 126
AT 112 - 718 192 117 179 108 163 98 146 102 185 128 168 118 148 201 105 140 155 183 110 130
AT 112 - 818 200 124 186 115 170 105 153 110 192 134 175 124 155 N.A. 113 147 161 190 117 136
AT 112 - 918 N.A. 129 193 120 177 110 159 114 200 140 182 129 161 N.A. 117 152 167 198 122 141
AT 112 - 520 186 106 172 97 156 86 138 91 179 118 161 107 140 195 94 131 147 177 99 120
AT 112 - 620 192 118 178 110 163 100 147 105 185 129 168 119 148 201 108 141 155 183 112 130
AT 112 - 720 201 121 187 112 171 101 153 106 194 133 176 122 155 211 109 147 162 192 115 135
AT 112 - 820 208 128 193 119 177 109 159 114 200 140 182 129 161 218 117 152 167 198 122 141
AT 112 - 920 216 133 201 124 184 114 165 118 208 145 189 134 167 226 122 158 174 206 127 147
AT 212 - 024 202 113 187 103 168 91 148 96 194 126 174 114 150 212 100 141 158 192 105 128
AT 212 - 124 199 117 185 106 168 95 150 100 192 129 173 117 152 209 104 143 158 190 109 131
AT 212 - 224 215 122 199 111 180 99 159 105 207 136 186 123 161 226 108 151 169 204 114 138
AT 212 - 324 216 128 201 118 183 105 163 111 208 141 188 129 165 226 115 156 173 206 121 143
AT 212 - 424 226 130 210 119 190 106 169 112 217 144 196 131 171 237 115 160 179 215 122 146
AT 212 - 524 231 139 215 128 196 115 176 121 222 153 202 140 178 242 125 168 186 220 131 155
AT 212 - 624 239 148 223 137 204 125 183 131 230 161 209 149 185 250 135 175 193 228 140 163
AT 212 - 724 245 148 228 137 208 124 187 130 236 163 214 149 189 256 134 179 197 233 140 165
AT 212 - 824 254 157 236 146 216 134 194 139 244 171 222 158 197 266 143 186 205 242 149 173
AT 212 - 924 272 169 253 157 232 144 208 150 262 183 238 170 211 N.A. 154 200 219 260 160 185
AT 212 - 128 235 132 218 120 196 106 173 112 226 147 203 133 175 247 116 164 184 224 123 149
AT 212 - 228 236 139 219 126 200 113 177 119 227 153 205 140 180 247 123 169 188 225 130 155
AT 212 - 328 248 141 229 128 208 113 183 120 238 156 214 142 186 260 124 174 195 236 131 159
AT 212 - 428 252 150 234 137 214 123 190 129 243 165 220 151 193 264 134 182 202 240 141 167
AT 212 - 528 260 160 242 149 221 135 199 142 250 174 227 161 201 272 145 191 209 248 152 176
AT 212 - 628 267 160 248 147 227 132 203 139 257 176 233 161 205 280 144 194 214 254 151 178
AT 212 - 728 276 171 257 159 235 145 211 151 266 186 242 172 214 289 155 203 223 263 162 188
AT 212 - 828 291 177 271 163 248 147 222 154 280 193 254 178 225 305 159 212 234 277 167 196
AT 212 - 928 303 187 282 174 258 160 232 166 292 204 265 189 234 317 171 222 244 289 178 206
Note: For alternate selections and conditions other than those stated, consult your EVAPSPEC II selection program or local EVAPCO representative.
8
C O O L I N G C A P A C I T Y
M O D E L S AT 2 1 2 - 0 3 6 T O 3 1 2 - 9 6 0
Cooling capacity in l/s
EWT 32 36 32 36 32 36 32 37 35 40 35 40 35 37 40 42 36 37 41 42
MODEL LWT 27 26 27 26 27 26 27 27 30 30 30 30 30 32 30 32 31 32 31 32
NO. WB 19 19 20 20 21 21 22 22 24 24 25 25 26 26 26 26 27 27 27 27
AT 212 - 036 295 171 274 157 249 140 221 147 283 190 256 173 224 309 152 210 234 281 160 193
AT 212 - 136 306 172 283 156 256 138 225 146 294 191 264 173 228 322 152 214 240 291 160 194
AT 212 - 236 319 196 297 182 272 166 244 173 307 214 279 198 247 334 178 234 257 304 186 216
AT 212 - 336 328 195 305 179 278 160 248 169 316 215 286 197 251 343 174 237 262 313 183 218
AT 212 - 436 338 209 314 193 288 176 258 184 325 227 296 210 262 354 189 248 272 322 197 230
AT 212 - 536 358 217 334 199 305 180 273 189 345 237 314 218 276 376 195 261 288 342 204 241
AT 212 - 636 371 230 346 214 316 195 284 204 358 250 325 231 288 389 209 273 299 354 218 253
AT 212 - 736 383 234 357 216 327 195 293 205 369 256 336 235 297 402 211 281 309 366 220 259
AT 212 - 836 399 247 372 230 340 211 306 220 385 269 350 249 309 N.A. 225 293 322 381 235 272
AT 212 - 936 N.A. 257 386 239 353 219 318 228 400 279 363 259 321 N.A. 234 305 335 396 244 282
AT 312 - 036 306 172 283 156 256 138 225 146 294 191 264 173 228 322 152 214 239 291 160 194
AT 312 - 136 302 177 281 162 255 144 227 152 290 195 263 179 230 317 157 216 240 288 166 198
AT 312 - 236 326 186 302 169 274 150 241 159 313 206 282 187 245 342 164 230 257 310 174 209
AT 312 - 336 327 195 304 179 277 160 247 168 315 214 285 196 251 342 174 236 262 312 183 217
AT 312 - 436 336 208 313 192 286 175 257 183 324 226 294 209 260 352 188 247 271 320 196 228
AT 312 - 536 350 211 326 194 298 175 266 184 337 231 306 212 270 367 189 255 281 334 198 235
AT 312 - 636 362 224 337 208 308 190 277 198 349 243 317 225 280 379 204 266 292 345 212 246
AT 312 - 736 371 225 345 208 316 187 283 197 357 246 324 227 286 388 203 271 298 353 212 250
AT 312 - 836 385 238 358 221 328 203 294 211 370 259 337 240 298 403 217 282 310 367 226 262
AT 312 - 936 N.A. 255 384 238 351 218 316 227 397 277 361 257 319 N.A. 233 303 332 393 242 281
AT 312 - 042 333 192 309 175 280 157 249 165 320 213 289 194 252 349 171 237 264 317 180 216
AT 312 - 142 357 200 330 182 298 161 262 170 343 223 308 202 266 375 177 249 279 339 187 226
AT 312 - 242 340 208 316 192 289 175 260 183 327 227 297 209 263 356 188 249 274 324 196 230
AT 312 - 342 358 210 332 192 303 172 269 181 344 232 311 212 273 375 187 257 285 341 197 235
AT 312 - 442 381 227 355 209 324 187 289 197 367 250 333 229 293 400 203 276 306 364 213 253
AT 312 - 542 393 243 366 225 335 205 301 215 379 264 344 245 305 412 220 289 317 375 230 267
AT 312 - 642 404 243 376 223 344 201 307 212 389 267 354 245 311 424 218 294 325 386 229 271
AT 312 - 742 418 259 390 241 356 220 320 229 403 281 366 260 324 438 235 307 337 399 245 285
AT 312 - 842 440 268 410 247 375 224 336 234 424 293 386 270 341 462 242 322 355 420 253 297
AT 312 - 942 458 284 427 264 391 242 351 252 442 308 401 286 355 N.A. 259 337 370 437 269 312
AT 312 - 054 462 260 428 236 386 209 340 221 444 289 398 262 345 486 229 323 362 439 242 293
AT 312 - 154 470 277 437 254 398 227 354 239 452 306 410 280 359 493 247 338 375 448 260 310
AT 312 - 254 503 288 467 263 423 234 374 247 484 320 436 291 379 528 256 356 398 479 270 325
AT 312 - 354 494 294 460 270 419 242 374 255 476 324 432 297 379 518 263 357 396 471 277 328
AT 312 - 454 509 314 474 291 433 266 390 278 490 342 446 316 394 533 285 373 410 485 298 346
AT 312 - 554 540 327 503 301 460 272 412 285 521 358 473 329 417 566 294 394 435 515 308 363
AT 312 - 654 560 346 521 322 477 294 428 307 539 376 490 349 434 586 315 411 451 534 328 381
AT 312 - 754 578 352 538 325 492 294 442 309 557 386 506 355 447 606 318 423 466 551 332 391
AT 312 - 854 602 373 561 347 513 318 461 331 580 405 527 375 466 N.A. 340 442 485 574 354 410
AT 312 - 954 N.A. 388 582 361 533 330 479 344 602 421 547 390 484 N.A. 353 459 504 597 368 426
AT 312 - 260 473 273 439 249 398 222 353 234 455 303 410 275 358 496 242 336 374 450 255 307
AT 312 - 360 485 296 451 274 413 249 370 261 467 324 424 298 375 508 268 355 390 462 280 328
AT 312 - 460 554 317 514 289 466 257 412 271 533 352 480 319 417 582 281 392 438 527 296 357
AT 312 - 560 556 332 517 305 472 273 421 288 535 365 486 334 427 582 297 402 445 530 312 370
AT 312 - 660 572 353 533 328 487 299 438 312 551 384 501 356 443 599 321 420 461 546 335 389
AT 312 - 760 600 362 559 334 510 301 457 316 578 397 525 365 463 628 326 437 482 572 342 403
AT 312 - 860 620 383 577 357 528 326 474 340 597 417 542 386 480 649 349 455 500 591 364 422
AT 312 - 960 643 398 599 371 548 339 493 354 620 433 563 401 498 674 363 472 519 614 378 438
Note: For alternate selections and conditions other than those stated, consult your EVAPSPEC II selection program or local EVAPCO representative.
9
C O O L I N G C A P A C I T Y
M O D E L S AT 2 2 4 - 0 1 8 T O 4 2 4 - 9 3 6
Cooling capacity
C O O L I N G C A P A C I T Y
M O D E L S AT 2 1 2 - 0 3 6 T O 3 1 2 - 9 6 0
Cooling capacity in l/s
EWT 32 36 32 36 32 36 32 37 35 40 35 40 35 37 40 42 36 37 41 42
MODEL LWT 27 26 27 26 27 26 27 27 30 30 30 30 30 32 30 32 31 32 31 32
NO. WB 19 19 20 20 21 21 22 22 24 24 25 25 26 26 26 26 27 27 27 27
AT 212 - 036 295 171 274 157 249 140 221 147 283 190 256 173 224 309 152 210 234 281 160 193
AT 212 - 136 306 172 283 156 256 138 225 146 294 191 264 173 228 322 152 214 240 291 160 194
AT 212 - 236 319 196 297 182 272 166 244 173 307 214 279 198 247 334 178 234 257 304 186 216
AT 212 - 336 328 195 305 179 278 160 248 169 316 215 286 197 251 343 174 237 262 313 183 218
AT 212 - 436 338 209 314 193 288 176 258 184 325 227 296 210 262 354 189 248 272 322 197 230
AT 212 - 536 358 217 334 199 305 180 273 189 345 237 314 218 276 376 195 261 288 342 204 241
AT 212 - 636 371 230 346 214 316 195 284 204 358 250 325 231 288 389 209 273 299 354 218 253
AT 212 - 736 383 234 357 216 327 195 293 205 369 256 336 235 297 402 211 281 309 366 220 259
AT 212 - 836 399 247 372 230 340 211 306 220 385 269 350 249 309 N.A. 225 293 322 381 235 272
AT 212 - 936 N.A. 257 386 239 353 219 318 228 400 279 363 259 321 N.A. 234 305 335 396 244 282
AT 312 - 036 306 172 283 156 256 138 225 146 294 191 264 173 228 322 152 214 239 291 160 194
AT 312 - 136 302 177 281 162 255 144 227 152 290 195 263 179 230 317 157 216 240 288 166 198
AT 312 - 236 326 186 302 169 274 150 241 159 313 206 282 187 245 342 164 230 257 310 174 209
AT 312 - 336 327 195 304 179 277 160 247 168 315 214 285 196 251 342 174 236 262 312 183 217
AT 312 - 436 336 208 313 192 286 175 257 183 324 226 294 209 260 352 188 247 271 320 196 228
AT 312 - 536 350 211 326 194 298 175 266 184 337 231 306 212 270 367 189 255 281 334 198 235
AT 312 - 636 362 224 337 208 308 190 277 198 349 243 317 225 280 379 204 266 292 345 212 246
AT 312 - 736 371 225 345 208 316 187 283 197 357 246 324 227 286 388 203 271 298 353 212 250
AT 312 - 836 385 238 358 221 328 203 294 211 370 259 337 240 298 403 217 282 310 367 226 262
AT 312 - 936 N.A. 255 384 238 351 218 316 227 397 277 361 257 319 N.A. 233 303 332 393 242 281
AT 312 - 042 333 192 309 175 280 157 249 165 320 213 289 194 252 349 171 237 264 317 180 216
AT 312 - 142 357 200 330 182 298 161 262 170 343 223 308 202 266 375 177 249 279 339 187 226
AT 312 - 242 340 208 316 192 289 175 260 183 327 227 297 209 263 356 188 249 274 324 196 230
AT 312 - 342 358 210 332 192 303 172 269 181 344 232 311 212 273 375 187 257 285 341 197 235
AT 312 - 442 381 227 355 209 324 187 289 197 367 250 333 229 293 400 203 276 306 364 213 253
AT 312 - 542 393 243 366 225 335 205 301 215 379 264 344 245 305 412 220 289 317 375 230 267
AT 312 - 642 404 243 376 223 344 201 307 212 389 267 354 245 311 424 218 294 325 386 229 271
AT 312 - 742 418 259 390 241 356 220 320 229 403 281 366 260 324 438 235 307 337 399 245 285
AT 312 - 842 440 268 410 247 375 224 336 234 424 293 386 270 341 462 242 322 355 420 253 297
AT 312 - 942 458 284 427 264 391 242 351 252 442 308 401 286 355 N.A. 259 337 370 437 269 312
AT 312 - 054 462 260 428 236 386 209 340 221 444 289 398 262 345 486 229 323 362 439 242 293
AT 312 - 154 470 277 437 254 398 227 354 239 452 306 410 280 359 493 247 338 375 448 260 310
AT 312 - 254 503 288 467 263 423 234 374 247 484 320 436 291 379 528 256 356 398 479 270 325
AT 312 - 354 494 294 460 270 419 242 374 255 476 324 432 297 379 518 263 357 396 471 277 328
AT 312 - 454 509 314 474 291 433 266 390 278 490 342 446 316 394 533 285 373 410 485 298 346
AT 312 - 554 540 327 503 301 460 272 412 285 521 358 473 329 417 566 294 394 435 515 308 363
AT 312 - 654 560 346 521 322 477 294 428 307 539 376 490 349 434 586 315 411 451 534 328 381
AT 312 - 754 578 352 538 325 492 294 442 309 557 386 506 355 447 606 318 423 466 551 332 391
AT 312 - 854 602 373 561 347 513 318 461 331 580 405 527 375 466 N.A. 340 442 485 574 354 410
AT 312 - 954 N.A. 388 582 361 533 330 479 344 602 421 547 390 484 N.A. 353 459 504 597 368 426
AT 312 - 260 473 273 439 249 398 222 353 234 455 303 410 275 358 496 242 336 374 450 255 307
AT 312 - 360 485 296 451 274 413 249 370 261 467 324 424 298 375 508 268 355 390 462 280 328
AT 312 - 460 554 317 514 289 466 257 412 271 533 352 480 319 417 582 281 392 438 527 296 357
AT 312 - 560 556 332 517 305 472 273 421 288 535 365 486 334 427 582 297 402 445 530 312 370
AT 312 - 660 572 353 533 328 487 299 438 312 551 384 501 356 443 599 321 420 461 546 335 389
AT 312 - 760 600 362 559 334 510 301 457 316 578 397 525 365 463 628 326 437 482 572 342 403
AT 312 - 860 620 383 577 357 528 326 474 340 597 417 542 386 480 649 349 455 500 591 364 422
AT 312 - 960 643 398 599 371 548 339 493 354 620 433 563 401 498 674 363 472 519 614 378 438
AT CoolingTowers are constructed of heavy duty materials
and are designed for superior performance providing long,
trouble-free operation. However, proper equipment selection,
installation and maintenance are necessary to ensure
optimum unit performance. Several of the major considerations
when designing and operating a cooling tower
installation are presented in the following paragraphs.
For additional information, contact your local EVAPCO representative.
Air Circulation
The location of a cooling tower is an important consideration
when reviewing system design. Since cooling towers
use large quantities of air, adequate spacing around the
unit is necessary for it to perform properly. The best place
to locate any cooling tower is on a roof or at ground level
away from walls and other obstructions. Cooling towers
that are located in wells, enclosures, or are adjacent to
high walls must be properly located to avoid the effects of
recirculation. Recirculation occurs when some of the hot
moist discharge air leaving the cooling tower flows back
into the fresh air inlet. When recirculation causes the inlet
wet bulb temperature to the cooling tower to be
increased, the capacity of the cooling tower is decreased.
Refer to EVAPCO Bulletin 311, Equipment Layout Manual,
for the recommended layout guidelines for cooling towers.
Maintaining the Recirculated Water System
A cooling tower removes heat by evaporating a portion of
the recirculated spray water. As a general rule, a cooling
tower evaporates 1.58 l/h per 1 kW of cooling capacity. As
this water evaporates, it leaves behind all of its mineral
content and impurities. Therefore, it is important to bleed
an amount equal to that which is evaporated to prevent
the buildup of impurities. If this is not done, the mineral
content in the water will increase until the solids eventually
deposit in the unit, causing heavy scaling. The bleed line
should be installed in the external piping of the unit. It
must be properly sized for the application and be provided
with a metering valve and flow measurement device to
allow for field adjustment of the bleed rate.
Water Treatment
EVAPCO recommends that all cooling tower users should
consult with a reputable water treatment company familiar
with local water conditions in order to determine the
extent and type of water treatment program recommended
for each specific application. Any chemical water treatment
used must be compatible with the galvanized construction
of the unit. If acid is used for treatment, it
should be accurately metered and the concentration properly
controlled. The pH of the water should be maintained
between 6.5 and 8.0. In order to prevent “white rust”, the
galvanized steel in the unit may require routine passivation
of the steel when the system is operating in the higher pH
levels.
Batch chemical feeding is not recommended because it
does not afford the proper degree of control. If acid cleaning
is required extreme caution must be exercised and only
inhibited acids compatible with galvanized steel construction
should be used. Consult EVAPCO’s Maintenance
Bulletin 112 for additional information.
Capacity Control
The design wet bulb temperature for which a cooling
tower is sized occurs only a small percentage of the time.
Since the wet bulb temperature is lower than design much
of the time, and cooling loads tend to fluctuate, some
form of capacity control will be required. The simplest
form of capacity control is to cycle the fans on and off.
However, this type of control results in larger temperature
differentials and does not provide close control of the leaving
water temperature.
A better method of capacity control is to use two speed
fan motors, which adds a second step of control. Two
speed motors are an excellent method of capacity control
for the AT Cooling Tower. This arrangement gives capacity
steps of 10% (fans off), 60% (Fans at half speed) and
100%.
Two speed motors also reduce operating costs. At half
speed, the motor draws approximately 15% of the full load
power. Since the maximum wet bulb temperature and
maximum load very seldom coincide, the cooling tower will
actually operate at half speed about 80% of the time.
Therefore, power costs will be reduced by 85% during the
major portion of the year.
A third advantage of two speed motors is that noise levels
are reduced by approximately 6 dB(A) when operating at
half speed. Since both the load and wet bulb temperature
are normally lower at night, the sound generated by the
cooling tower will be substantially reduced during the
most noise sensitive time period.
For multiple cell units, both fan cycling and two speed
motors can be used to provide additional steps of control.
The combination of fan cycling and two speed motors
offers a simple and inexpensive means of controlling unit
capacity along with substantially reducing the energy costs
of the cooling tower.
Piping
Cooling tower piping should be designed and installed in
accordance with generally accepted engineering practices.
All piping should be supported by properly designing
hangers and supports with allowances made for possible
expansion and contraction of the piping system. No external
loads should be placed on the cooling tower connections.
Do NOT anchor any of the piping supports to the
cooling tower or its framework.
Control of Biological Contamination
Water quality should be checked regularly for biological
contamination. If biological contamination is detected, a
more aggressive water treatment and mechanical cleaning
program should be undertaken. The water treatment program
should be performed by a qualified water treatment
company. It is important that all internal surfaces be kept
clean of accumulated dirt and sludge. In addition, the drift
eliminators should be checked periodically to ensure that
they are clean and have not been damaged.
Note: The location of the cooling tower must be considered
during the equipment layout stages of a project. It is
important to prevent the discharge air (potential of biological
contamination) from being introduced into the
fresh air intakes of the building.
3
4
A
Advanced Technology Low Sound Solutions
The NEW AT Cooling Tower is now available with four (4) equipment
options to reduce the overall sound generated from the
side or top of the AT Cooling Tower. Each option provides various
levels of sound reduction and can be used in combination to
provide the lowest sound level. Consult EVAPCO’s EVAPSPEC or
ES II selection program for unit sound levels. If a detailed analysis
or full octave band data sheet is required for your application,
please consult your EVAPCO Sales Representative.
NOTE: These low sound options may impact the overall
installed dimensions of the AT Cooling Tower selected.
Super Low Sound Fan 9–15 dB(A) Reduction versus Standard Fan!
The Super Low Sound Fan offered by EVAPCO utilizes an extremely
wide chord blade design available for sound sensitive applications
where the lowest sound levels are desired. The fan is onepiece
molded heavy duty FRP construction utilizing a forward
swept blade design. The Super Low Sound fan is capable of
reducing the unit sound pressure levels 9 dB(A) to 15 dB(A),
depending on specific unit selection and measurement location.
The fans are high efficiency axial propeller type and operate with
no loss of thermal performance.
The Super Low Sound Fan is available on all 2.4m wide AT Cooling
Towers, ATW Closed Circuit Coolers and ATC Evaporative
Condensers.
Low Sound Fan 4–7 dB(A) Reduction!
The Low Sound Fan offered by EVAPCO is a wide chord blade design
available for sound sensitive applications where low sound levels are
desired. It is aluminum blade construction with a steel fan hub. The
Low Sound Fan is capable of reducing the unit sound pressure levels
4 dB(A) to 7 dB(A), depending on specific unit selection and
measurement location. The fans are high efficiency axial propeller
type and operate with no loss of thermal performance.
The Low Sound Fan is available on 3.6m wide AT Cooling Towers,
ATW Closed Circuit Coolers and ATC Evaporative Condensers.
AT Fan Discharge Sound Attenuation Up to 10 dB(A) Reduction!
The AT Fan Discharge Attenuator offered by EVAPCO is an additional
option available to further reduce the sound level of the
unit. The attenuator can be used with the standard AT fan or in
combination with the Low Sound Fan option.
The discharge attenuator is a factory assembled straight sided discharge
hood designed to reduce overall discharge sound levels at
full fan speed 5 dB(A) to 10 dB(A), depending on specific unit
selection and measurement location. It is constructed of Z-725 galvanized
steel as standard (options available for Type 304 stainless
steel) and includes insulated walls
(depending on water loading and louver
height) measured 1.5m from the side or end of the unit when
water is circulated with fans off.
The water silencers are constructed of lightweight PVC sections
and can be easily removed for access to the basin area. The water
silencer will have no impact on unit thermal performance.
Consult EVAPCO’s Advanced Technology Low Sound
Solutions Bulletin No. 650-EU for detailed product and specification
information.
Freecooling
Freecooling is when chilled water is produced by the cooling
tower without the use of a mechanical chiller during low ambient
conditions. The freecooling or economizer mode of an air
conditioning system is used to save cost per kWH when the conditions
allow the water in the tower to be cooled to “chiller” like
temperatures, typically 5.5°C–7°C LWT.
EVAPCO’s counterflow cooling towers are well suited for free
cooling applications. The counterflow fill design helps prevent
ice formation with its even temperature gradient through the fill
section and enclosed location blocking it from the elements.
However, special caution must be taken when selecting, sizing
and operating a cooling tower during normal winter or severe
winter applications.
Please consult EVAPCO’s Engineering Bulletin on Free Cooling
Operation of Open Cooling Towers or EVAPCO to assist in selecting
a tower for a freecooling application.
High Temperature Applications
EVAPCO’s AT Cooling Tower as standard is capable of handling
up to 55°C entering water temperature, which is higher than
most crossflow cooling tower fill sheets. It will not deform or
degrade at a continuous temperature application of 55°C.
However, there are applications where a higher temperature
rated fill is required. For these applications, a fill material is
available as an option which allows the entering water temperature
to operate at a continuous 65°C.
Please consult the factory for selections of high temperature fill
Cooling Towers.
Dirty Water Applications
The fill used in the AT Cooling Tower is designed to operate in
almost all cooling water applications. However, there are some
“dirty” water applications where the standard fill spacing is not
adequate, such as a pulp and paper mill cooling tower or other
application where heavy particulate will be mixed in with the
water.
For additional information, contact your local EVAPCO representative.
Alternate AT Arrangements
The AT Cooling Tower will fit almost every application. However,
there are installations with special piping locations or existing
steel that will require the AT to be modified to fit the layout.
Please contact the factory and we will develop a design to fit
your need.
Special Applications of the AT Cooling Tower
The standard AT Cooling Tower is suitable for the majority of air conditioning and industrial cooling applications. However, there are
some design situations where special consideration must be given with regard to materials of construction, thermal performance,
sound level and water quality. Some of these special applications are described below.
Consult the Factory
• Layout Guidelines
• Bypass Connection Sizing and Location
• Equalizer Connection Sizing and Location
• Remote Sump Connection Sizing and Location
• Field Thermal Performance Tests
• Seismic and Wind Load Application
• Operating and Maintenance Questions
• Ladders, Platforms and Motor Davits
5
Electric Heaters
Electric immersion heaters are available factory installed
in the basin of the cooling tower. They are sized to
maintain a +4 or
+5°C pan water
temperature with
the fans off and an
ambient air temperature
of -18°C.
They are furnished
with a combination
thermostat/low
water protection
device to cycle the
heater on when
required and to prevent the heater elements from energizing
unless they are completely submerged. All components
are in weather proof enclosures for outdoor use.
The heater power contactors and electric wiring are not
included as standard.
Electric Water Level Control
EVAPCO cooling towers are
available with an optional
electric water level control
system in place of the standard
mechanical makeup
valve and float assembly.
This package provides very
accurate control for the
basin water level and does
not require field adjustment, even under varying operating
conditions.
The control was designed by EVAPCO and is manufactured
exclusively for EVAPCO. It consists of multiple
heavy duty stainless steel electrodes. These electrodes
are mounted external to the unit in a vertical stand
pipe. For winter operation, the stand pipe must be
wrapped with electric heating cable and insulated to
protect it from freezing.
The weather protected slow closing solenoid valve(s) for
the makeup water connection is factory supplied and is
ready for piping to a water supply with a pressure
between 140 and 340 kPa.
Stainless Steel Water Touch Basin
The AT Cooling Tower has a modular design which
allows specific areas to be enhanced for increased corrosion
protection. The basin area of the cooling tower
experiences turbulent mixing of air and water, in addition
to silt build-up. In conjunction with the EVAPCOAT
Corrosion Protection System, EVAPCO offers an optional
Stainless Steel Water Touch Basin. This option provides
Type 304 or Type 316 stainless steel for the entire basin
area including the support columns of the cooling tower
and the louver frames. The basin section provides the
structural support for the unit and is the most important
part of the cooling tower. The Stainless Steel Water
Touch Basin provides maximum corrosion protection.
Other Options
• Hot Water or Steam Coils
• Steam Injectors
• Bottom Suction Connections
• Vibration Isolators (single cell only)
• Vibration Switches
• Remote Sump Connections
• Concrete Basin (By Others) Cooling Tower Option
(Type B and C)
Optional Equipment for the AT Cooling Tower
The standard design of the NEW EVAPCO AT provides the customer with the easiest cooling tower to maintain in the
industry. There are additional options which can make maintenance easier and extend the life of the cooling tower.
These options are listed below.
O P T I O N A L E Q U I P M E
(depending on water loading and louver
height) measured 1.5m from the side or end of the unit when
water is circulated with fans off.
The water silencers are constructed of lightweight PVC sections
and can be easily removed for access to the basin area. The water
silencer will have no impact on unit thermal performance.
Consult EVAPCO’s Advanced Technology Low Sound
Solutions Bulletin No. 650-EU for detailed product and specification
information.
Freecooling
Freecooling is when chilled water is produced by the cooling
tower without the use of a mechanical chiller during low ambient
conditions. The freecooling or economizer mode of an air
conditioning system is used to save cost per kWH when the conditions
allow the water in the tower to be cooled to “chiller” like
temperatures, typically 5.5°C–7°C LWT.
EVAPCO’s counterflow cooling towers are well suited for free
cooling applications. The counterflow fill design helps prevent
ice formation with its even temperature gradient through the fill
section and enclosed location blocking it from the elements.
However, special caution must be taken when selecting, sizing
and operating a cooling tower during normal winter or severe
winter applications.
Please consult EVAPCO’s Engineering Bulletin on Free Cooling
Operation of Open Cooling Towers or EVAPCO to assist in selecting
a tower for a freecooling application.
High Temperature Applications
EVAPCO’s AT Cooling Tower as standard is capable of handling
up to 55°C entering water temperature, which is higher than
most crossflow cooling tower fill sheets. It will not deform or
degrade at a continuous temperature application of 55°C.
However, there are applications where a higher temperature
rated fill is required. For these applications, a fill material is
available as an option which allows the entering water temperature
to operate at a continuous 65°C.
Please consult the factory for selections of high temperature fill
Cooling Towers.
Dirty Water Applications
The fill used in the AT Cooling Tower is designed to operate in
almost all cooling water applications. However, there are some
“dirty” water applications where the standard fill spacing is not
adequate, such as a pulp and paper mill cooling tower or other
application where heavy particulate will be mixed in with the
water.
For additional information, contact your local EVAPCO representative.
Alternate AT Arrangements
The AT Cooling Tower will fit almost every application. However,
there are installations with special piping locations or existing
steel that will require the AT to be modified to fit the layout.
Please contact the factory and we will develop a design to fit
your need.
Special Applications of the AT Cooling Tower
The standard AT Cooling Tower is suitable for the majority of air conditioning and industrial cooling applications. However, there are
some design situations where special consideration must be given with regard to materials of construction, thermal performance,
sound level and water quality. Some of these special applications are described below.
Consult the Factory
• Layout Guidelines
• Bypass Connection Sizing and Location
• Equalizer Connection Sizing and Location
• Remote Sump Connection Sizing and Location
• Field Thermal Performance Tests
• Seismic and Wind Load Application
• Operating and Maintenance Questions
• Ladders, Platforms and Motor Davits
5
Electric Heaters
Electric immersion heaters are available factory installed
in the basin of the cooling tower. They are sized to
maintain a +4 or
+5°C pan water
temperature with
the fans off and an
ambient air temperature
of -18°C.
They are furnished
with a combination
thermostat/low
water protection
device to cycle the
heater on when
required and to prevent the heater elements from energizing
unless they are completely submerged. All components
are in weather proof enclosures for outdoor use.
The heater power contactors and electric wiring are not
included as standard.
Electric Water Level Control
EVAPCO cooling towers are
available with an optional
electric water level control
system in place of the standard
mechanical makeup
valve and float assembly.
This package provides very
accurate control for the
basin water level and does
not require field adjustment, even under varying operating
conditions.
The control was designed by EVAPCO and is manufactured
exclusively for EVAPCO. It consists of multiple
heavy duty stainless steel electrodes. These electrodes
are mounted external to the unit in a vertical stand
pipe. For winter operation, the stand pipe must be
wrapped with electric heating cable and insulated to
protect it from freezing.
The weather protected slow closing solenoid valve(s) for
the makeup water connection is factory supplied and is
ready for piping to a water supply with a pressure
between 140 and 340 kPa.
Stainless Steel Water Touch Basin
The AT Cooling Tower has a modular design which
allows specific areas to be enhanced for increased corrosion
protection. The basin area of the cooling tower
experiences turbulent mixing of air and water, in addition
to silt build-up. In conjunction with the EVAPCOAT
Corrosion Protection System, EVAPCO offers an optional
Stainless Steel Water Touch Basin. This option provides
Type 304 or Type 316 stainless steel for the entire basin
area including the support columns of the cooling tower
and the louver frames. The basin section provides the
structural support for the unit and is the most important
part of the cooling tower. The Stainless Steel Water
Touch Basin provides maximum corrosion protection.
Other Options
• Hot Water or Steam Coils
• Steam Injectors
• Bottom Suction Connections
• Vibration Isolators (single cell only)
• Vibration Switches
• Remote Sump Connections
• Concrete Basin (By Others) Cooling Tower Option
(Type B and C)
Optional Equipment for the AT Cooling Tower
The standard design of the NEW EVAPCO AT provides the customer with the easiest cooling tower to maintain in the
industry. There are additional options which can make maintenance easier and extend the life of the cooling tower.
These options are listed below.
Optional Equipment for the AT Cooling Tower
The standard design of the NEW EVAPCO AT provides the customer with the easiest cooling tower to maintain in the
industry. There are additional options which can make maintenance easier and extend the life of the cooling tower.
Electric Heaters
Electric immersion heaters are available factory installed
in the basin of the cooling tower. They are sized to
maintain a +4 or
+5°C pan water
temperature with
the fans off and an
ambient air temperature
of -18°C.
They are furnished
with a combination
thermostat/low
water protection
device to cycle the
heater on when
required and to prevent the heater elements from energizing
unless they are completely submerged. All components
are in weather proof enclosures for outdoor use.
The heater power contactors and electric wiring are not
included as standard.
Electric Water Level Control
EVAPCO cooling towers are
available with an optional
electric water level control
system in place of the standard
mechanical makeup
valve and float assembly.
This package provides very
accurate control for the
basin water level and does
not require field adjustment, even under varying operating
conditions.
The control was designed by EVAPCO and is manufactured
exclusively for EVAPCO. It consists of multiple
heavy duty stainless steel electrodes. These electrodes
are mounted external to the unit in a vertical stand
pipe. For winter operation, the stand pipe must be
wrapped with electric heating cable and insulated to
protect it from freezing.
The weather protected slow closing solenoid valve(s) for
the makeup water connection is factory supplied and is
ready for piping to a water supply with a pressure
between 140 and 340 kPa.
Stainless Steel Water Touch Basin
The AT Cooling Tower has a modular design which
allows specific areas to be enhanced for increased corrosion
protection. The basin area of the cooling tower
experiences turbulent mixing of air and water, in addition
to silt build-up. In conjunction with the EVAPCOAT
Corrosion Protection System, EVAPCO offers an optional
Stainless Steel Water Touch Basin. This option provides
Type 304 or Type 316 stainless steel for the entire basin
area including the support columns of the cooling tower
and the louver frames. The basin section provides the
structural support for the unit and is the most important
part of the cooling tower. The Stainless Steel Water
Touch Basin provides maximum corrosion protection.
Other Options
• Hot Water or Steam Coils
• Steam Injectors
• Bottom Suction Connections
• Vibration Isolators (single cell only)
• Vibration Switches
• Remote Sump Connections
• Concrete Basin (By Others) Cooling Tower Option
(Type B and C)
Optional Equipment for the AT Cooling Tower
The standard design of the NEW EVAPCO AT provides the customer with the easiest cooling tower to maintain in the
industry. There are additional options which can make maintenance easier and extend the life of the cooling tower.
These options are listed below.
O P T I O N A L E Q U I P M E N T
AT Heater Sizes
AT models -18°C -29°C -40°C
kW kW kW
AT 19-56 to 96 5 7 9
19-28 to 98 6 8 12
18-49 to 99 6 9 12
18-511 to 911 7 10 15
18-312 to 912 2 x 4 2 x 6 2 x 8
18-214 to 914 2 x 5 2 x 7 2 x 9
28-518 to 918 2 x 6 2 x 9 2 x 12
28-521 to 921 2 x 7 2 x 10 2 x 15
28-524 to 924 4 x 4 4 x 6 4 x 8
28-428 to 928 4 x 5 4 x 7 4 x 9
38-236 to 936 6 x 4 6 x 6 6 x 8
38-442 to 942 6 x 5 6 x 7 6 x 9
112-012 to 912 2 x 6 2 x 9 2 x 12
112-314 to 914 2 x 7 2 x 10 2 x 15
112-018 to 918 2 x 9 2 x 15 2 x 18
112-520 to 920 2 x 10 2 x 15 3 x 15
212-024 to 924 4 x 6 4 x 9 4 x 12
212-128 to 928 4 x 7 4 x 10 4 x 15
212-036 to 936 4 x 9 4 x 15 4 x 18
312-036 to 936 6 x 6 6 x 9 6 x 12
312-042 to 942 6 x 7 6 x 10 6 x 15
312-054 to 954 6 x 9 6 x 15 6 x 18
312-260 to 960 6 x 10 6 x 15 9 x 15
224-018 to 918 4 x 9 4 x 15 4 x 18
424-024 to 924 4 x 12 4 x 18 6 x 15
424-036 to 936 4 x 18 6 x 18 8 x 18
6
C
Cooling capacity in l/s
EWT 32 36 32 36 32 36 32 37 35 40 35 40 35 37 40 42 36 37 41 42
MODEL LWT 27 26 27 26 27 26 27 27 30 30 30 30 30 32 30 32 31 32 31 32
NO. WB 19 19 20 20 21 21 22 22 24 24 25 25 26 26 26 26 27 27 27 27
AT 19 - 56 31 17 29 15 26 14 23 14 30 19 27 17 23 33 15 22 24 30 16 20
AT 19 - 66 34 19 32 17 28 15 25 16 33 21 29 19 25 36 17 24 27 32 18 22
AT 19 - 76 37 22 34 20 31 18 28 19 36 24 32 22 28 39 20 27 30 35 21 24
AT 19 - 86 40 24 37 22 34 20 30 21 39 26 35 24 31 42 22 29 32 38 23 27
AT 19 - 96 45 28 42 26 38 24 35 25 44 30 40 28 35 47 25 33 36 43 27 31
AT 19 - 28 38 21 35 19 32 16 28 17 37 23 33 21 28 41 18 26 30 36 19 24
AT 19 - 38 41 23 38 21 34 18 30 19 40 26 35 23 31 44 20 29 32 39 21 26
AT 19 - 48 44 25 41 22 37 20 32 21 42 28 38 25 33 46 22 31 35 42 23 28
AT 19 - 58 44 26 41 24 38 21 33 22 43 29 39 26 34 47 23 32 35 42 24 29
AT 19 - 68 48 28 44 26 41 23 36 25 46 31 42 29 37 50 25 35 38 46 27 32
AT 19 - 78 49 30 46 28 42 26 38 27 47 33 43 31 38 51 27 36 40 47 29 33
AT 19 - 88 52 32 49 29 44 26 40 27 50 35 46 32 40 55 28 38 42 50 30 35
AT 19 - 98 54 34 51 31 46 29 42 30 52 37 48 34 42 57 31 40 44 52 32 37
AT 18 - 49 51 30 47 27 43 25 38 26 49 33 44 30 39 53 27 37 41 48 28 34
AT 18 - 59 53 30 49 28 45 25 40 26 51 34 46 31 40 56 27 38 42 51 29 34
AT 18 - 69 58 35 54 32 49 29 44 30 56 38 51 35 45 60 31 42 46 55 33 39
AT 18 - 79 59 37 55 34 50 31 45 33 57 40 52 37 46 62 33 44 48 57 35 40
AT 18 - 89 62 38 58 35 53 32 47 33 60 41 54 38 48 65 34 45 50 59 36 42
AT 18 - 99 64 40 60 37 55 34 49 35 62 43 56 40 50 N.A. 36 47 52 61 38 44
AT 18 - 511 58 34 53 31 49 28 43 29 55 37 50 34 44 60 30 41 46 55 32 38
AT 18 - 611 66 38 61 35 55 31 49 33 63 42 57 38 50 69 34 47 52 63 36 43
AT 18 - 711 67 42 63 39 57 35 51 37 65 45 59 42 52 70 38 49 54 64 39 46
AT 18 - 811 71 43 66 40 60 36 54 38 68 47 62 43 55 74 39 52 57 68 41 48
AT 18 - 911 73 45 68 42 62 39 56 40 71 49 64 46 57 77 41 54 59 70 43 50
AT 18 - 312 64 37 59 34 54 30 48 32 62 41 56 38 49 67 33 46 51 61 35 42
AT 18 - 412 68 42 63 38 58 35 52 37 65 45 59 42 52 71 38 50 54 64 39 46
AT 18 - 512 73 42 68 38 62 34 55 36 71 47 64 42 55 77 37 52 58 70 39 47
AT 18 - 612 79 48 73 44 67 40 60 42 76 52 69 48 61 83 43 58 63 75 45 53
AT 18 - 712 82 51 76 47 70 43 63 45 79 55 72 51 64 86 46 60 66 78 48 56
AT 18 - 812 83 51 78 47 71 42 64 44 80 56 73 51 64 87 46 61 67 79 48 56
AT 18 - 912 86 54 80 50 74 46 66 48 83 58 76 54 67 N.A. 49 63 70 82 51 59
AT 18 - 214 78 46 73 42 66 38 59 40 75 51 68 46 60 82 41 56 62 75 43 52
AT 18 - 314 82 51 76 47 70 43 63 45 79 55 72 51 63 86 46 60 66 78 48 56
AT 18 - 414 86 49 80 45 72 40 64 42 83 55 74 50 65 90 44 61 68 82 46 55
AT 18 - 514 86 51 80 47 73 42 65 45 82 56 75 52 66 90 46 62 69 82 48 57
AT 18 - 614 90 55 83 51 76 47 69 49 86 60 78 56 69 94 50 66 72 85 52 61
AT 18 - 714 92 56 86 51 78 46 70 49 89 61 81 56 71 97 50 67 74 88 53 62
AT 18 - 814 96 58 89 54 82 49 73 51 92 64 84 59 74 100 53 70 77 91 55 65
AT 18 - 914 100 62 93 58 85 53 77 55 96 67 87 62 77 N.A. 56 73 81 95 59 68
AT 28 - 518 98 60 91 56 84 51 75 53 95 66 86 61 76 103 55 72 79 94 57 67
AT 28 - 618 108 61 100 56 90 50 80 53 103 68 93 62 81 113 54 76 85 102 57 69
AT 28 - 718 117 70 109 65 99 58 89 61 112 77 102 71 90 122 63 85 94 111 66 78
AT 28 - 818 126 77 117 71 107 64 96 67 121 84 110 77 97 132 69 92 101 120 72 85
AT 28 - 918 130 80 121 75 110 68 99 71 125 87 114 81 100 N.A. 73 95 105 124 76 88
AT 28 - 521 116 68 108 62 98 56 87 59 112 75 101 69 89 122 61 83 92 111 64 76
AT 28 - 621 120 74 112 69 103 62 92 65 116 81 105 75 93 126 67 88 97 115 70 82
AT 28 - 721 133 77 123 70 112 62 99 66 128 85 115 77 101 139 68 94 105 126 72 86
AT 28 - 821 143 87 133 80 122 72 109 76 138 95 125 88 111 150 78 105 115 136 82 97
AT 28 - 921 148 92 138 85 126 78 113 81 143 100 130 92 115 155 84 109 119 141 87 101
AT 28 - 524 135 83 126 77 115 70 103 73 130 91 118 84 105 142 75 99 109 129 79 92
AT 28 - 624 147 84 136 77 124 69 109 72 141 93 127 85 111 154 75 104 116 140 79 95
AT 28 - 724 158 95 147 88 134 79 120 83 152 105 138 96 122 165 86 115 127 150 90 106
AT 28 - 824 166 102 155 94 142 85 127 89 160 111 146 102 129 174 92 122 134 159 96 113
AT 28 - 924 173 107 161 100 147 91 132 95 166 116 151 108 134 N.A. 98 127 139 165 102 118
AT 28 - 428 156 92 145 84 132 75 118 79 151 102 136 93 119 164 82 112 125 149 86 103
AT 28 - 528 172 99 159 90 145 80 128 85 165 109 149 99 130 180 88 122 136 163 92 111
AT 28 - 628 184 112 172 103 157 93 141 97 178 122 161 112 142 193 100 135 148 176 105 124
AT 28 - 728 192 117 179 108 163 97 146 102 185 128 168 118 148 201 105 140 154 183 110 129
AT 28 - 828 192 119 179 110 163 101 147 105 185 129 168 120 149 201 108 141 155 183 113 131
AT 28 - 928 200 124 186 115 170 106 153 110 193 134 175 125 155 N.A. 113 147 161 191 117 136
Note: For alternate selections and conditions other than those stated, consult your EVAPSPEC II selection program or local EVAPCO representative.
7
C O
Cooling capacity in l/s
EWT 32 36 32 36 32 36 32 37 35 40 35 40 35 37 40 42 36 37 41 42
MODEL LWT 27 26 27 26 27 26 27 27 30 30 30 30 30 32 30 32 31 32 31 32
NO. WB 19 19 20 20 21 21 22 22 24 24 25 25 26 26 26 26 27 27 27 27
AT 38 - 236 179 98 165 88 148 77 129 83 171 109 153 99 131 188 86 123 138 169 91 111
AT 38 - 336 192 112 178 102 162 91 144 96 185 124 167 113 146 201 100 137 153 183 105 126
AT 38 - 436 203 125 189 115 173 105 155 110 195 136 177 125 157 212 113 149 163 193 118 138
AT 38 - 536 220 126 204 115 185 103 164 108 212 140 191 127 166 231 112 156 174 209 118 142
AT 38 - 636 216 129 201 118 183 106 164 112 208 142 188 130 166 226 115 156 173 206 121 144
AT 38 - 736 236 143 220 132 201 119 180 125 228 157 207 144 183 248 129 173 190 226 135 159
AT 38 - 836 250 152 233 140 213 127 191 133 240 167 219 153 193 262 137 183 201 238 144 169
AT 38 - 936 259 161 241 149 221 137 198 143 250 174 227 162 201 N.A. 146 190 209 247 152 176
AT 38 - 442 222 136 207 126 189 114 170 120 214 148 194 137 172 233 123 163 179 212 128 150
AT 38 - 542 257 148 239 135 217 120 192 127 248 164 223 149 195 270 131 182 204 245 139 166
AT 38 - 642 276 167 258 154 235 139 211 146 266 184 242 169 214 290 151 202 223 264 158 186
AT 38 - 742 288 175 268 161 245 146 220 153 277 192 252 176 222 301 158 210 232 274 165 194
AT 38 - 842 288 178 268 166 245 152 220 158 277 194 252 179 223 302 162 211 232 275 169 196
AT 38 - 942 300 186 279 173 255 158 230 165 289 202 262 187 232 N.A. 169 220 242 286 176 204
AT 112 -012 93 51 86 46 77 41 68 43 89 57 80 52 69 98 45 64 72 88 48 58
AT 112 -112 101 57 93 51 84 45 74 48 97 63 87 57 75 106 50 70 79 96 53 64
AT 112 -212 107 61 100 56 90 49 80 52 103 68 93 62 81 113 54 76 85 102 57 69
AT 112 -312 108 64 100 59 91 53 82 55 104 71 94 65 83 113 57 78 86 103 60 72
AT 112 -412 113 65 105 59 95 53 84 56 109 72 98 66 85 119 58 80 89 108 61 73
AT 112 -512 111 68 103 63 94 58 85 60 107 74 97 69 86 116 62 81 89 106 65 75
AT 112 -612 115 70 108 64 98 58 88 60 111 76 101 70 89 121 62 84 93 110 65 77
AT 112 -712 122 74 114 68 104 62 93 65 118 81 107 75 94 128 67 89 98 117 70 82
AT 112 -812 127 79 118 73 108 67 97 70 122 85 111 79 98 133 72 93 102 121 75 86
AT 112 -912 136 84 127 78 116 72 104 75 131 91 119 85 105 N.A. 77 100 110 130 80 93
AT 112 - 314 124 70 115 64 104 57 92 60 119 78 107 71 93 130 62 87 97 118 66 79
AT 112 - 414 126 75 117 69 107 62 95 65 121 82 110 75 96 132 67 91 101 120 70 84
AT 112 - 514 130 80 121 74 111 68 99 71 125 87 114 81 101 136 73 95 105 124 76 88
AT 112 - 614 133 80 124 74 113 66 101 70 128 88 117 81 103 140 72 97 107 127 75 89
AT 112 - 714 138 85 129 79 118 72 106 76 133 93 121 86 107 145 78 101 111 132 81 94
AT 112 - 814 145 88 135 81 124 74 111 77 140 97 127 89 112 152 80 106 117 139 83 98
AT 112 - 914 151 94 141 87 129 80 116 83 146 102 132 94 117 159 85 111 122 144 89 103
AT 112 - 018 146 81 135 73 122 65 107 69 140 91 126 82 108 154 71 101 114 139 76 92
AT 112 - 118 153 86 142 78 128 69 113 73 147 96 132 87 114 161 76 107 120 146 80 97
AT 112 - 218 156 92 145 84 132 75 117 79 150 101 136 93 119 163 82 112 124 149 86 103
AT 112 - 318 164 98 153 90 139 80 124 84 158 107 143 98 126 172 87 118 131 156 92 109
AT 112 - 418 169 104 157 97 144 88 129 92 163 113 148 105 131 177 95 124 136 161 99 115
AT 112 - 518 179 108 167 100 153 90 137 94 173 119 157 109 138 188 97 131 144 171 102 120
AT 112 - 618 186 115 173 107 158 98 142 102 179 125 162 116 144 195 105 136 150 177 109 126
AT 112 - 718 192 117 179 108 163 98 146 102 185 128 168 118 148 201 105 140 155 183 110 130
AT 112 - 818 200 124 186 115 170 105 153 110 192 134 175 124 155 N.A. 113 147 161 190 117 136
AT 112 - 918 N.A. 129 193 120 177 110 159 114 200 140 182 129 161 N.A. 117 152 167 198 122 141
AT 112 - 520 186 106 172 97 156 86 138 91 179 118 161 107 140 195 94 131 147 177 99 120
AT 112 - 620 192 118 178 110 163 100 147 105 185 129 168 119 148 201 108 141 155 183 112 130
AT 112 - 720 201 121 187 112 171 101 153 106 194 133 176 122 155 211 109 147 162 192 115 135
AT 112 - 820 208 128 193 119 177 109 159 114 200 140 182 129 161 218 117 152 167 198 122 141
AT 112 - 920 216 133 201 124 184 114 165 118 208 145 189 134 167 226 122 158 174 206 127 147
AT 212 - 024 202 113 187 103 168 91 148 96 194 126 174 114 150 212 100 141 158 192 105 128
AT 212 - 124 199 117 185 106 168 95 150 100 192 129 173 117 152 209 104 143 158 190 109 131
AT 212 - 224 215 122 199 111 180 99 159 105 207 136 186 123 161 226 108 151 169 204 114 138
AT 212 - 324 216 128 201 118 183 105 163 111 208 141 188 129 165 226 115 156 173 206 121 143
AT 212 - 424 226 130 210 119 190 106 169 112 217 144 196 131 171 237 115 160 179 215 122 146
AT 212 - 524 231 139 215 128 196 115 176 121 222 153 202 140 178 242 125 168 186 220 131 155
AT 212 - 624 239 148 223 137 204 125 183 131 230 161 209 149 185 250 135 175 193 228 140 163
AT 212 - 724 245 148 228 137 208 124 187 130 236 163 214 149 189 256 134 179 197 233 140 165
AT 212 - 824 254 157 236 146 216 134 194 139 244 171 222 158 197 266 143 186 205 242 149 173
AT 212 - 924 272 169 253 157 232 144 208 150 262 183 238 170 211 N.A. 154 200 219 260 160 185
AT 212 - 128 235 132 218 120 196 106 173 112 226 147 203 133 175 247 116 164 184 224 123 149
AT 212 - 228 236 139 219 126 200 113 177 119 227 153 205 140 180 247 123 169 188 225 130 155
AT 212 - 328 248 141 229 128 208 113 183 120 238 156 214 142 186 260 124 174 195 236 131 159
AT 212 - 428 252 150 234 137 214 123 190 129 243 165 220 151 193 264 134 182 202 240 141 167
AT 212 - 528 260 160 242 149 221 135 199 142 250 174 227 161 201 272 145 191 209 248 152 176
AT 212 - 628 267 160 248 147 227 132 203 139 257 176 233 161 205 280 144 194 214 254 151 178
AT 212 - 728 276 171 257 159 235 145 211 151 266 186 242 172 214 289 155 203 223 263 162 188
AT 212 - 828 291 177 271 163 248 147 222 154 280 193 254 178 225 305 159 212 234 277 167 196
AT 212 - 928 303 187 282 174 258 160 232 166 292 204 265 189 234 317 171 222 244 289 178 206
Note: For alternate selections and conditions other than those stated, consult your EVAPSPEC II selection program or local EVAPCO representative.
8
C O O L I N G C A P A C I T Y
M O D E L S AT 2 1 2 - 0 3 6 T O 3 1 2 - 9 6 0
Cooling capacity in l/s
EWT 32 36 32 36 32 36 32 37 35 40 35 40 35 37 40 42 36 37 41 42
MODEL LWT 27 26 27 26 27 26 27 27 30 30 30 30 30 32 30 32 31 32 31 32
NO. WB 19 19 20 20 21 21 22 22 24 24 25 25 26 26 26 26 27 27 27 27
AT 212 - 036 295 171 274 157 249 140 221 147 283 190 256 173 224 309 152 210 234 281 160 193
AT 212 - 136 306 172 283 156 256 138 225 146 294 191 264 173 228 322 152 214 240 291 160 194
AT 212 - 236 319 196 297 182 272 166 244 173 307 214 279 198 247 334 178 234 257 304 186 216
AT 212 - 336 328 195 305 179 278 160 248 169 316 215 286 197 251 343 174 237 262 313 183 218
AT 212 - 436 338 209 314 193 288 176 258 184 325 227 296 210 262 354 189 248 272 322 197 230
AT 212 - 536 358 217 334 199 305 180 273 189 345 237 314 218 276 376 195 261 288 342 204 241
AT 212 - 636 371 230 346 214 316 195 284 204 358 250 325 231 288 389 209 273 299 354 218 253
AT 212 - 736 383 234 357 216 327 195 293 205 369 256 336 235 297 402 211 281 309 366 220 259
AT 212 - 836 399 247 372 230 340 211 306 220 385 269 350 249 309 N.A. 225 293 322 381 235 272
AT 212 - 936 N.A. 257 386 239 353 219 318 228 400 279 363 259 321 N.A. 234 305 335 396 244 282
AT 312 - 036 306 172 283 156 256 138 225 146 294 191 264 173 228 322 152 214 239 291 160 194
AT 312 - 136 302 177 281 162 255 144 227 152 290 195 263 179 230 317 157 216 240 288 166 198
AT 312 - 236 326 186 302 169 274 150 241 159 313 206 282 187 245 342 164 230 257 310 174 209
AT 312 - 336 327 195 304 179 277 160 247 168 315 214 285 196 251 342 174 236 262 312 183 217
AT 312 - 436 336 208 313 192 286 175 257 183 324 226 294 209 260 352 188 247 271 320 196 228
AT 312 - 536 350 211 326 194 298 175 266 184 337 231 306 212 270 367 189 255 281 334 198 235
AT 312 - 636 362 224 337 208 308 190 277 198 349 243 317 225 280 379 204 266 292 345 212 246
AT 312 - 736 371 225 345 208 316 187 283 197 357 246 324 227 286 388 203 271 298 353 212 250
AT 312 - 836 385 238 358 221 328 203 294 211 370 259 337 240 298 403 217 282 310 367 226 262
AT 312 - 936 N.A. 255 384 238 351 218 316 227 397 277 361 257 319 N.A. 233 303 332 393 242 281
AT 312 - 042 333 192 309 175 280 157 249 165 320 213 289 194 252 349 171 237 264 317 180 216
AT 312 - 142 357 200 330 182 298 161 262 170 343 223 308 202 266 375 177 249 279 339 187 226
AT 312 - 242 340 208 316 192 289 175 260 183 327 227 297 209 263 356 188 249 274 324 196 230
AT 312 - 342 358 210 332 192 303 172 269 181 344 232 311 212 273 375 187 257 285 341 197 235
AT 312 - 442 381 227 355 209 324 187 289 197 367 250 333 229 293 400 203 276 306 364 213 253
AT 312 - 542 393 243 366 225 335 205 301 215 379 264 344 245 305 412 220 289 317 375 230 267
AT 312 - 642 404 243 376 223 344 201 307 212 389 267 354 245 311 424 218 294 325 386 229 271
AT 312 - 742 418 259 390 241 356 220 320 229 403 281 366 260 324 438 235 307 337 399 245 285
AT 312 - 842 440 268 410 247 375 224 336 234 424 293 386 270 341 462 242 322 355 420 253 297
AT 312 - 942 458 284 427 264 391 242 351 252 442 308 401 286 355 N.A. 259 337 370 437 269 312
AT 312 - 054 462 260 428 236 386 209 340 221 444 289 398 262 345 486 229 323 362 439 242 293
AT 312 - 154 470 277 437 254 398 227 354 239 452 306 410 280 359 493 247 338 375 448 260 310
AT 312 - 254 503 288 467 263 423 234 374 247 484 320 436 291 379 528 256 356 398 479 270 325
AT 312 - 354 494 294 460 270 419 242 374 255 476 324 432 297 379 518 263 357 396 471 277 328
AT 312 - 454 509 314 474 291 433 266 390 278 490 342 446 316 394 533 285 373 410 485 298 346
AT 312 - 554 540 327 503 301 460 272 412 285 521 358 473 329 417 566 294 394 435 515 308 363
AT 312 - 654 560 346 521 322 477 294 428 307 539 376 490 349 434 586 315 411 451 534 328 381
AT 312 - 754 578 352 538 325 492 294 442 309 557 386 506 355 447 606 318 423 466 551 332 391
AT 312 - 854 602 373 561 347 513 318 461 331 580 405 527 375 466 N.A. 340 442 485 574 354 410
AT 312 - 954 N.A. 388 582 361 533 330 479 344 602 421 547 390 484 N.A. 353 459 504 597 368 426
AT 312 - 260 473 273 439 249 398 222 353 234 455 303 410 275 358 496 242 336 374 450 255 307
AT 312 - 360 485 296 451 274 413 249 370 261 467 324 424 298 375 508 268 355 390 462 280 328
AT 312 - 460 554 317 514 289 466 257 412 271 533 352 480 319 417 582 281 392 438 527 296 357
AT 312 - 560 556 332 517 305 472 273 421 288 535 365 486 334 427 582 297 402 445 530 312 370
AT 312 - 660 572 353 533 328 487 299 438 312 551 384 501 356 443 599 321 420 461 546 335 389
AT 312 - 760 600 362 559 334 510 301 457 316 578 397 525 365 463 628 326 437 482 572 342 403
AT 312 - 860 620 383 577 357 528 326 474 340 597 417 542 386 480 649 349 455 500 591 364 422
AT 312 - 960 643 398 599 371 548 339 493 354 620 433 563 401 498 674 363 472 519 614 378 438
Note: For alternate selections and conditions other than those stated, consult your EVAPSPEC II selection program or local EVAPCO representative.
9
C O O L I N G C A P A C I T Y
M O D E L S AT 2 2 4 - 0 1 8 T O 4 2 4 - 9 3 6
Cooling capacity
C O O L I N G C A P A C I T Y
M O D E L S AT 2 1 2 - 0 3 6 T O 3 1 2 - 9 6 0
Cooling capacity in l/s
EWT 32 36 32 36 32 36 32 37 35 40 35 40 35 37 40 42 36 37 41 42
MODEL LWT 27 26 27 26 27 26 27 27 30 30 30 30 30 32 30 32 31 32 31 32
NO. WB 19 19 20 20 21 21 22 22 24 24 25 25 26 26 26 26 27 27 27 27
AT 212 - 036 295 171 274 157 249 140 221 147 283 190 256 173 224 309 152 210 234 281 160 193
AT 212 - 136 306 172 283 156 256 138 225 146 294 191 264 173 228 322 152 214 240 291 160 194
AT 212 - 236 319 196 297 182 272 166 244 173 307 214 279 198 247 334 178 234 257 304 186 216
AT 212 - 336 328 195 305 179 278 160 248 169 316 215 286 197 251 343 174 237 262 313 183 218
AT 212 - 436 338 209 314 193 288 176 258 184 325 227 296 210 262 354 189 248 272 322 197 230
AT 212 - 536 358 217 334 199 305 180 273 189 345 237 314 218 276 376 195 261 288 342 204 241
AT 212 - 636 371 230 346 214 316 195 284 204 358 250 325 231 288 389 209 273 299 354 218 253
AT 212 - 736 383 234 357 216 327 195 293 205 369 256 336 235 297 402 211 281 309 366 220 259
AT 212 - 836 399 247 372 230 340 211 306 220 385 269 350 249 309 N.A. 225 293 322 381 235 272
AT 212 - 936 N.A. 257 386 239 353 219 318 228 400 279 363 259 321 N.A. 234 305 335 396 244 282
AT 312 - 036 306 172 283 156 256 138 225 146 294 191 264 173 228 322 152 214 239 291 160 194
AT 312 - 136 302 177 281 162 255 144 227 152 290 195 263 179 230 317 157 216 240 288 166 198
AT 312 - 236 326 186 302 169 274 150 241 159 313 206 282 187 245 342 164 230 257 310 174 209
AT 312 - 336 327 195 304 179 277 160 247 168 315 214 285 196 251 342 174 236 262 312 183 217
AT 312 - 436 336 208 313 192 286 175 257 183 324 226 294 209 260 352 188 247 271 320 196 228
AT 312 - 536 350 211 326 194 298 175 266 184 337 231 306 212 270 367 189 255 281 334 198 235
AT 312 - 636 362 224 337 208 308 190 277 198 349 243 317 225 280 379 204 266 292 345 212 246
AT 312 - 736 371 225 345 208 316 187 283 197 357 246 324 227 286 388 203 271 298 353 212 250
AT 312 - 836 385 238 358 221 328 203 294 211 370 259 337 240 298 403 217 282 310 367 226 262
AT 312 - 936 N.A. 255 384 238 351 218 316 227 397 277 361 257 319 N.A. 233 303 332 393 242 281
AT 312 - 042 333 192 309 175 280 157 249 165 320 213 289 194 252 349 171 237 264 317 180 216
AT 312 - 142 357 200 330 182 298 161 262 170 343 223 308 202 266 375 177 249 279 339 187 226
AT 312 - 242 340 208 316 192 289 175 260 183 327 227 297 209 263 356 188 249 274 324 196 230
AT 312 - 342 358 210 332 192 303 172 269 181 344 232 311 212 273 375 187 257 285 341 197 235
AT 312 - 442 381 227 355 209 324 187 289 197 367 250 333 229 293 400 203 276 306 364 213 253
AT 312 - 542 393 243 366 225 335 205 301 215 379 264 344 245 305 412 220 289 317 375 230 267
AT 312 - 642 404 243 376 223 344 201 307 212 389 267 354 245 311 424 218 294 325 386 229 271
AT 312 - 742 418 259 390 241 356 220 320 229 403 281 366 260 324 438 235 307 337 399 245 285
AT 312 - 842 440 268 410 247 375 224 336 234 424 293 386 270 341 462 242 322 355 420 253 297
AT 312 - 942 458 284 427 264 391 242 351 252 442 308 401 286 355 N.A. 259 337 370 437 269 312
AT 312 - 054 462 260 428 236 386 209 340 221 444 289 398 262 345 486 229 323 362 439 242 293
AT 312 - 154 470 277 437 254 398 227 354 239 452 306 410 280 359 493 247 338 375 448 260 310
AT 312 - 254 503 288 467 263 423 234 374 247 484 320 436 291 379 528 256 356 398 479 270 325
AT 312 - 354 494 294 460 270 419 242 374 255 476 324 432 297 379 518 263 357 396 471 277 328
AT 312 - 454 509 314 474 291 433 266 390 278 490 342 446 316 394 533 285 373 410 485 298 346
AT 312 - 554 540 327 503 301 460 272 412 285 521 358 473 329 417 566 294 394 435 515 308 363
AT 312 - 654 560 346 521 322 477 294 428 307 539 376 490 349 434 586 315 411 451 534 328 381
AT 312 - 754 578 352 538 325 492 294 442 309 557 386 506 355 447 606 318 423 466 551 332 391
AT 312 - 854 602 373 561 347 513 318 461 331 580 405 527 375 466 N.A. 340 442 485 574 354 410
AT 312 - 954 N.A. 388 582 361 533 330 479 344 602 421 547 390 484 N.A. 353 459 504 597 368 426
AT 312 - 260 473 273 439 249 398 222 353 234 455 303 410 275 358 496 242 336 374 450 255 307
AT 312 - 360 485 296 451 274 413 249 370 261 467 324 424 298 375 508 268 355 390 462 280 328
AT 312 - 460 554 317 514 289 466 257 412 271 533 352 480 319 417 582 281 392 438 527 296 357
AT 312 - 560 556 332 517 305 472 273 421 288 535 365 486 334 427 582 297 402 445 530 312 370
AT 312 - 660 572 353 533 328 487 299 438 312 551 384 501 356 443 599 321 420 461 546 335 389
AT 312 - 760 600 362 559 334 510 301 457 316 578 397 525 365 463 628 326 437 482 572 342 403
AT 312 - 860 620 383 577 357 528 326 474 340 597 417 542 386 480 649 349 455 500 591 364 422
AT 312 - 960 643 398 599 371 548 339 493 354 620 433 563 401 498 674 363 472 519 614 378 438
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