ELECTRIC ELEVATORS

ELECTRIC ELEVATORS
PART 1-GENERAL
1.1 RELATED DOCUMENTS
Drawings and General Provisions of the Contract, including General Conditions,
Particular Conditions and Division-1 Specifications Group apply to work of this
Section.
1.2 SCOPE OF WORK
MECHANICAL TRANSPORTATION WORK: unless otherwise specified,
includes the supply, installation, testing and commissioning of the complete
mechanical transportation systems, equipment and materials shown on the
Drawings and./or described in the specification together with all associated
ancillary work, support work and builder¡¦s work in connection (supports &
beams)
This section covers the provision of Vertical Transportation systems in
accordance with Architectural, Structural, Mechanical and Electrical drawings.
Provide all labor, materials, equipment and services for elevators indicated on the
drawings and as specified herein.
1.3 SUMMARY
1.3.1 The purpose of the job is to supply, install, test, commission, guarantee and
maintain for one year the following:
A. 3 Service elevators.
B. 9 Passenger elevators.

C. 2 Panoramic elevators.
1.3.2 The Contractor shall supply all labor and material necessary and shall install,
complete and ready for use, the elevators plants.
The Contractor shall carry out the whole of the elevators work in a workmanlike
and substantial manner and in strict conformance with the codes listed in the
following clauses or approved equal.
All equipment material supplied for the elevators plant of this project shall be
manufactured in strict compliance with the standards listed in the following
clauses.
1.3.3 Elevator specifications are intended to cover the complete installation of the
elevator plants and to outline broadly the equipment required but not to cover the
details of design and construction. Such details are recognized to be the exclusive
responsibility of manufacturer and installer. It is hereby recognized that the
engineer didn't invent or develop any part of the elevator systems, but has only
made selections of capacities, speed control systems, materials,¡K etc. from
choices made available by the manufacturer.
1.3.4 Connection to BMS system, including interface elements detailed in
BMS schedules and/or shown on the drawings.
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1.4 GENERAL REQUIREMENTS
- THE PASSENGER AND SERVICE ELEVATORS ARE TO BE OF THE
LATEST TECHNOLOGY OF GEARELESS SYSTEM WITH MACHINEROOM
ABOVE.
- THE PANORAMIC ELEVATORS ARE TO BE OF THE LATEST
TECHNOLOGY OF GEARELESS SYSTEM WITH MACHINE-ROOM LESS
- INSTALLATIONS GENERALLY:
- Carry out mechanical transportation work in accordance with exact
shop/construction Drawings, Specification and Regulations, ensuring performance
requirements and safe operational systems with equipment readily accessible for
maintenance and repair.
Installations are to be complete a and coordinated with all other work on site.
Installation is to be carried out by qualified personnel.
Provide accessories necessary to complete the installation, of the types specified
or recommended for the purpose by the manufacturer of the equipment.
- SCHEDULES:
- Complete the schedules at the time of the Tender. If characteristics of the
proposed equipment differ from the specification, these differences are to be
brought to the attention of the Engineer for approval in a separate letter.
- EQUIPMENT SPACES AND ROOMS:
- Check that structural provisions and dimensions, ventilating and cooling
arrangements and other provisions in equipment spaces and rooms are suitable for
installation, operation and maintenance of proposed equipment. Note any
discrepancies or additional requirements on the shop and construction drawings.
- POWER SUPPLY:
- will be brought in at a disconnect switch located inside machine room or nearby
machines, as shown on drawings.
- PERMITS AND CERTIFICATES OF INSPECTION:
- Prepare drawings and other required documents prior approval of the installation
and submit to the local authorities having jurisdiction and obtain approval before
installation where so required by the local authorities.
- LOCAL MAINTENANCE ORGANIZATION:
- Give evidence and demonstrate to the satisfaction of the Engineer that the
manufacturer of the equipment has a locally established and authorized
organization which can be called upon for professional advice and maintenance as
may be required and which can immediately supply spare parts to support day-today
and emergency maintenance requirements. Failure to satisfy the Engineer may
disqualify a manufacturer.
- PROGRAMME:
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- submit a programme for the execution of the installation(s) giving times for
commencement of shipping, arrival on site, start of erection, completion of
erection and handing-over calculated from the date of the order to commence.
- SYSTEMS USED BEFORE SUBSTANTIAL COMPLETION:
- for the benefit of the contractor, if approved, are to have all consumable elements
refurbished and defective equipment replaced by new, not later than 7 days before
the date of substantial completion of the work.
- GUARANTEE:
- Submit a formal letter from the manufacturer specifically for this project,
unequivocally guaranteeing material and workmanship for a period of one year
from substantial completion. The manufacturer is to undertake to make good any
defect which may develop during this year, to the convenience of and without
additional cost to the Employer.
1.5 REFERENCE STANDARDS
- Supply and install all vertical transport equipment in accordance with the latest
edition of ANSI/ASME A-17.1 or BS 5655 and with all local codes and
regulations that govern the installations. When regulations do not fully cover
technical aspects of high-speed elevators, and when specifically cited in these
specifications meet the requirements of the latest edition of ANSI A17.1 Safety
code.
- Unless in conflict with the above regulations, material, work and installation are
to conform to the latest edition of the Regulations and standards referred to for the
particular systems under the specification.
1.6 DESIGN CONDITIONS:
Design and derate equipment to operate normally and continuously in the worst
ambient conditions of the site. should these conditions be unacceptable the
manufacturer is to indicate the worst ambient conditions acceptable but, in no
case, should the worst ambient conditions be lower than 45 degrees C. If
ventilation or air conditioning provided under other sections of the specification is
insufficient. provide additional ventilation or cooling without additional cost to
the Employer.
1.7 CLIMATIC CONDITIONS:
Equipment is to be designed and derated for continuous and trouble free service
under the following climatic conditions:
Altitude : Sea Level
minimum ambient
temperature : 8 deg. C
maximum ambient
temperature
( in the shade) : 45 deg. C
maximum relative
humidity : 95%
atmospheric
conditions : Dusty storms mostly.
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1.8 TEMPERATURE LIMITS:
The manufacturer is to indicate maximum and minimum ambient temperatures
acceptable for the equipment to operate continuously and normally and beyond
which electronic components may suffer permanent damage.
1.9 POWER SUPPLY:
Electric power will be supplied from a three phase distribution system with
characteristics indicated in the schedules. Nominal voltage and frequency rating
of electrical equipment is to correspond to the system.
1.10 SOLID STATE:
Equipment under normal conditions of operation are to withstand any surges
which might be produced by sudden power switching operations. Protective
devices are to be provided to protect against surges, overload and short-circuit.
1.11 INDICATOR LIGHTS:
other than LV pilot lamps are to be light emitting diodes (LEDS).
1.12 ELECTROMAGNETIC RELAYS:
And control/small power transformers are to be designed to withstand the 500 V
a.c. test voltage between winding and winding or winding and core.
1.13 DUST COVERS:
Easily removable for inspection and servicing, are to be provided for all relays and
sensitive elements.
1.14 OUTDOOR EQUIPMENT:
Electronic or other, is to be designed for maximum ambient temperatures of direct
sun and is to be protected/enclosed, as applicable, against dust and weather
conditions.
1.15 SEGREGATION OF WIRING:
Design wiring so that control circuits are segregated from power wiring, using
separate conduits, wireways and cables for the purpose. Composite wiring and
wiring of power and control circuits within same enclosure will be acceptable for
the same system in accordance with the relevant codes, whereby cable insulation
is to be of the same grade for all conductors.
1.16 CO-ORDINATION:
Provide shop drawings showing detailed dimensions and the methods of joining
elevator system work to the work of other divisions. Include all required
information and templates.
The Contractor is required to ensure proper coordination between the elevator
contractor and other Sub-contractors.
1.17 SUBMITTALS
The Contractor shall verify elevator well plumb and dimensions, prior to the
preparation of shop drawings, and submit to the Engineer any proposed
modifications that needed to suit the actual site conditions.
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Submit layout and shop drawings in ample time for considered review. Show all
work including car enclosure and landing entrance coordination details. Show top
clearance above cross head and counterweight frame, equipment location on top
of cars, heat release data, structural beams and their elevations, reaction loads and
locations. Show elevator well sections that including vertical and horizontal plans.
1.18 INSPECTION STAMP:
Equipment is to bear the factory inspection stamp and the label of approval of the
quality inspection authority of the country of origin.
PART 2-PRODUCTS
2.1 ELECTRIC MAIN EQUIPMENT
Traction Machine: the elevator shall be equipped with ac-variable and variable
frequency control gearlessed motors. Having stepless smooth speed time
characteristics. The traction machines shall be designed to meet the severe service
conditions encountered in the elevator operation.
Traction sheave, hoisting, motor, electromagnetic holding, breaker etc. shall be
mounted on a suitable vibration damper to isolate the machines from the structure
of the building.
All rotating parts shall be statically balanced to smooth running. All the rotating
electrical machinery shall be fitted with microtherms, to provide over load
protection.
2.2 MOTOR DRIVE
The variable voltage, variable frequency motor drive (AC-VVVF)-GEARE-LESS
unit will control the motor speed using a microprocessor.
The (AC-VVVF)-GEARE-LESS system will be provided with a converter, which
performs ac-to-dc conversion, and an inverter, which is designed to invert dc-tothree
phases-variable-voltage-variable-frequency ac.
The inverter, with output of sinusoidal current with zero (0) through fifty (50)
hertz by application of pulse width modulation technology. The inverter will
control voltage and frequency continuously and accurately in accordance with
speed commands signals, which is performed by a microprocessor in the elevator
controller.
The (AC-VVVF) ¡V GEARE-LESS drive unit will be capable of keeping the
elevator service under the following condition:-
Supply line voltage fluctuation 10% to 5% from the rated voltage, frequency
variation ¡Ó 2% from the rated frequency.
The (AC-VVVF) ¡V geare-less drive unit will be provided with contactors for
removing the power from the motor of the traction machine.
The contractor will open each time the car stops. The brake of the traction
machine will be applied while the contacts drop out.
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A pluse rotary encoder will detect the actual speed of the car. The difference
between the speed command signal and the actual speed measured by the pulse
rotary encoder will control the motor speed while the car is accelerating,
decelerating and landing.
Protective devices will ensure to open the main circuit between the (AC-VVVE)-
GEARE-LESS unit and the motor of the traction machine to stop the elevator
when one of the following conditions occur:-
Phase reversal, phase failure of supply voltage, over current, over heating of
thyristor and transistor operation of any safety device.
2.3 CONTROL SYSTEM
- The control system will consist of the (AC-VVVF)- geare-less motor drive unit
and a computer controlled regulator will control the car speed by comparing the
actual car speed detected by a pulse rotary encoder with and ideal speed pattern
generated by a microprocessor.
While the car is accelerating, the ideal accelerating pattern will be generated by
the micropocessor to obtain the smooth and optimum acceleration.
While the car is decelerating, the microprocessor will calculate and provide the
ideal speed pattern to obtain the comfortable and stable riding performance.
At landing, a smooth landing pattern will be generated by a microprocessor, and
as soon as the car has stopped, the mechanical brake will be applied to hold the
car.
- All elevators shall be equipped with emergency power supply consists of battery
kit to land the elevator to the nearest door in case of failure of main power supply
2.4 OPERATION
The operation of each elevator shall be as defined in the schedule of each
elevator.
A. If Single Car:
1. The operation will be of up/down selective collective type, the operating
equipment will consist of a series of micro switch buttons in the car
numbered to correspond to the various landing. A single riser of "up" and
"down" buttons at the intermediate landing and single buttons at the terminal
landing, all connected electrically with the microprocessor governing floor
selection and direction described below.
2. The car will be normally parked with doors closed at the main floor.
3. The car will answer its car calls of all floors respectively.
4. Response to hall callls will be on the basis of same direction, priority
repsonse, long waiting time prevention ¡K.etc.
B. If Two Car Group And Above:
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1. The operation will be of group selective collective type. The operating
equipment will consist of a series of micro switch buttons in each car
numbered to correspond to the varies landings. A single riser of "up" and
"down" buttons at the intermediate landings and single buttons at the
terminal landings all connected electrically with the microprocessor
governing floor selection and direction of travel to supply the operation
described below.
2. One car will be normally parked with doors closed a the main floor and the
other will be a "free car, which parks with doors closed at its last call floor.
3. Each car will answer its car calls of all floors respectively.
4. The microprocessor calculates penalty values for such things as by-passing,
reversal and response by distantly positioned elevators and assigns the call to
the elevator that will minimize the total penalty value.
5. Response to hall calls will be on the basis of same direction priority
response, nearest car response, long waiting time prevention, car bunching
prevention, etc.
2.5 ANCILLARLES:
- Oil Storage Tank:
- to have sufficient capacity to provide an adequate oil reserve to prevent the
entrance of air or other gas into the system.
- Oil storage tank:
- to be of rigid construction so as to prevent distortion due to the pressure of oil and
to be so designed and constructed the when completely filled, a factor of safety of
at least four, based on the ultimate strength of the material shall be obtained.
- Tank and Feed Pipe Connections:
- to be of an oil tight construction.
- Tank:
- to be of adequate depth to permit setting of the oil.
- OIL LEVEL:
- means for checking the oil level to be provided and the minimum permissible
level to be easily checked without the removal of any cover or other parts of the
unit. A removable bolted tank cover as well as suitable vent to the atmosphere,
fitted with a breather, to be provided.
- Filter: system to incorporate a continuous full flow removable oil filter.
- Drain : means for draining the tank to provided.
- Guide Shoes:
- each elevator shall have four sets of car and counterweight guide shoes. Each
guide shoe shall be made of suitable resilient material each fixed inside suitable
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metal frames. A suitable guide rail oilier shall be fixed on each guide rail side at
the top and bottom of the car and counterweight.
- Buffers:
- provide car and counterweight buffers as per the requirement of applicable codes
mentioned elsewhere in the specifications. Buffers shall be tested in the works and
test certificate shall be produced upon request. Provide pipe stands, struts, braces
or other supports, for buffers.
- Pump/Motor:
- to be flexible suspended in the oil reservoir. Pump to be of the positive
displacement self-priming triple screw type designed for long life and quiet
running. Motor to be open-frame 2-pole direct oil-cooled type flange mounted to
pump and thermistor protected to prevent overheating.
- A.C Electric motor:
- to be multipole induction type, reversible rated for the voltage specified it is to be
specifically designed designed for lift service and sustain continuous operation in
the maximum ambient temperature specified with number of starts indicated in
hour.
- Schedule No. 1:
- motor is to be self ventilating with high starting torque and low starting current.
- Variable Speed A.C Motor:
- to be induction type 3-phase reversible with electronically controlled speed using
controlled semiconductor power rectifiers (thyristors) in the main circuit and solid
state electronically computed acceleration-and deceleration equipment in the
control circuits. Speed measurement and feed back control are to be through a
tachogenerator mounted on the machine, measuring the actual revolutions of the
drive and comparing with programmed reference level. Deceleration is to be
electronically control or controlled d.c current. Acceleration and deceleration are
not to exceed 1m/sec/sec.
- Machine Motor Assembly:
- motor, traction sheaves, brake gear box and bearings are to be mounted as one unit
assembly on a common bed plate.
- Adequately isolate assembly form main building structure by means of cork or
other approved material, to prevent transmission of noise and vibration.
- Provide steel joints and hand operated winch of adequate strength and fix in each
machine room to facilitate lifting and moving away each assembly.
- Pulleys:
- traction sheaves are to be fine grained cast iron of proper hardness, accurately
grooved for the number and size of hoisting ropes and to give constant traction
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and long rope life. Deflection sheaves are to be similar in construction to traction
sheaves. Bearings for sheaves are to be approved type.
- Diameter is to be not less than forty times to overall diameter of the ropes.
Provide a guard extending below machine level for deflection and secondary
sheaves.
- Hydraulic Rams:
- to be piston or displacement type as recommended by manufacturers. Cylinder to
be manufactured from high grade hydraulic steel tube, hone-bored for piston type
rams. Rams to be of steel tube machined smooth and true with fine ground finish
and running in bronze bearing fitted with wiper ring.
- Chains:
- to be duplicated heavy duty high tensile multiple leaf chains with a safety factory
of at least 10.
- Cylinder:
- to be placed into a suitable casing of iron or steel. The cylinder casing to be
100mm. larger in diameter than the cylinder. The whole assembly to be mounted
on the surface of the lowest slab or pit surface and shall not penetrate into the
ground.
- Parking:
- special type packing to be provided to eliminate leakage under widely variable
load conditions.
- Sills:
- unless otherwise specified, all landing sills shall be made of extruded aluminum.
Grooves shall be machined to give minimum clearance for the guides. The sills
shall be supported on steel angles which are in turn securely fastened to building
structure.
- Door Hangers:
- Provide a sheave type two point suspension hanger and track complete for each
hoistway and car door.
- Hangers shall be supplied with adjustable rollers to take the up thrust of doors.
- Tracks shall be of heavy section with surface shaped to conform to the tread of
hanger sheaves and rollers. Suitable means shall be used to transmit motion from
one door panel to the other.
- Hanger Supports:
- hanger supports shall be of thick steel sections securely bolted to strut angles or to
building structure.
- Hanger Cover Plates:
- Hanger cover plates shall be made of sheet steel and shall extend the full width of
door.
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- Sight Guards:
- provide sight guards for all openings, installed in manner to reduce to a minimum
the clearance between the hoistway doors and the car doors so as to conceal the
hoistway and car beyond the door opening.
- Toe Guards:
- to e guards shall be of sheet steel and shall be installed at the lowest landing. They
shall extend to the full width of the door opening.
- Automatic leveling:
- to provided for all lifts, maximum tolerance +/-5 mm for passenger lifts. Accuracy
to be maintained regardless of change of load or rope stretch.
- Guide Rails:
- for smooth running of the counter weight and the elevator car, guide rails with
steel tee section shall be installed, covering the entire height of the elevator shaft.
The rails shall rest on the hoist way pit to prevent exerting any physical forces on
hoistway ceiling or wall of the building
- Hoisting Ropes:
- bright steel wire ropes with fiber cores of adequate cross section steel wire ropes
with adequate cross section.
- Governor Ropes:
- these shall be manufactured similar to hoisting ropes. The two ends shall be
securely linked to the car and attached to the safety gearless operating level. A
weight-loaded device located in the pit shall tension the governor ropes.
- Counter Weight: cast iron blocks enclosed in steel framework shall be
provided to balance the weight of the car and the specified capacity.
Counter weight safety shall be provided for elevators do not start form the
lowest floor.
- Over Travel: Over travel limit switches shall be provided at the top and
bottom of the terminal landing to disconnect the power supply and apply
brakes to bring the car to safe stop position in the event of an over travel in
either direction.
2.6 Fireman Emergency Operation:
Fire emergency operation button enclosed in a breaking glass shall be installed
near the entrance on the main landing and shall operate any one of the elevators
under conditions of emergency in the event of fire.
When the fireman emergency call button is pressed it shall immediately
disconnect the elevator under normal automatic operation and the car shall return
to the main landing. It shall not register any hall calls, so that the passenger will
not wait for the elevator. The car shall then only operate on the attendant
operation and it shall start registering the hall calls.
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2.7 Limit Switch And Final Limit Switch
The lift is provided with terminal stopped switches which are arranged to slow
and stop the lift car automatically at the terminal landing, irrespective of speed
attained by the car in normal operation and irrespective of any load up to and
including contract load in the lift car.
The terminal stopping switch functions independently of the normal car operating
devices, the floor stopping switches, the final limit switches.
The lifts are provided with final limit switches, which are arranged to cut off
power from the lift hoist motor causing the brake to apply beyond the terminal
landings. The final limit switches function independently of the normal car
operation devices, the floor stopping switches and the terminal stopping switches
and are arranged to stop the lift car within the car top clearance and the bottom
over-travel provided for the lift. The final limit switches are arranged to stop the
lift car as close to the terminal floors as practicable without interfering with the
normal operation of the lift. The opening of the final limit switch prevents further
movement of the lift car in both direction of travel. Both the terminal stopping
switches and final limit switches are of the enclosed type securely mounted on the
lift car or in the hoist way.
2.8 Compensating Chain
Each lift with a total travel of 20 meter and over shall be provided with
compensating chain to compensate the weight of the unbalanced portion of the
hoisting ropes.
Chains shall be interwoven with each core to minimize noise.
2.9 Car
The size of the car interior design and decoration ceiling and light and other
facilities shall be as called for in the schedule.
The car shall be of rigid steel framework with sound isolation designed and
manufactured all in accordance with relevant sectors.
The operating buttons and keys shall be as given in the relevant section of the
specification. The following facilities shall be provided for each car, in addition to
the items already specified.
Construction:
structural steel frame members are to be robust and suitably braced and fastened
together. Car is to be clad internally and externally with sheet metal at least
1.5mm thick which is not to drum during normal operation. Materials are to be
fire-resisting.
Roof:
is to be reinforced to sustain a load of 150kg on any 0.2m2 and 50kg at any point.
Provide trap door at least 500x600mm opening outward and capable of being
opened from both sides. Opening of the trap is to activate an electrical interlock
preventing operation of the lift.
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Platform:
frame is to be filled in with timber sub-flooring and timber top flooring to receive
specified finish. Underside of platform is to be protected by a covering of sheet
steel at least 1.5mm thick.
Sill:
to be anti-slip, with provision for car doors.
Load Weighing Device:
to be built into floor.
Isolating Cushion:
provide rubber pads supported on an auxiliary steel frame fastened to car frame to
form an isolating cushion between car and steel car frame.
Guide devices:
to be adjustable and renewable and fastened to top and bottom of car frame.
Guard Rails and Kick-Plates:
fitted to car are to be not less than 75mm and 150mm wide respectively.
Ceiling Fixture:
are to include lighting fittings, louvers and finishes as described under lift
particulars and must be approved by the engineer. Lighting fixtures are to be
concealed fluorescent instant start or rapid start, non-flickering giving a minimum
of 200 LUX ceiling materials are to be of to quality, non-corroding materials on
the specified types. Louvers are to be neatly arranged with no light leaks, and are
to be padded and rigidly seated.
Inspection Lighting:
provide inspection lamp sockets inside, on the roof and below the car.
Ventilation:
electric ventilator mounting on car roof with proper vents to be provided.
Emergency Lighting:
self contained non maintained emergency light with a trickle charger which will
give not less than three hours duration on main failure. The battery to be
rechargeable type.
Intercommunication system:
inter communication system between the car, main landing and the machine room
shall be provided.
Working Platform:
a working platform shall be provided on the roof of the car.
Car and Landing Doors:
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the car landing doors shall be fully automatic, two stainless steel panel sliding
doors. The type and finish of the doors shall be specified in the schedule.
Door operator:
the door operator shall be high-speed heavy duty. The inverter shall include high
speed switching device which in turn shall provide a smooth sine curve of output
current to assure smooth, quite and precise doors control the opening landing and
car doors shall operate in full synchronism. Advance door opening during car's
approach to a landing could be used to speed up passenger transfer.
Safety features:
Emergency unlocking key from landing side for evacuation and maintenance
work.
Manual opening of the doors from inside the car, within landing zones during
power failure.
Full door height safety edge of the car doors to reverse the doors when there is
any obstruction for closing.
Electrical interlock to operate in conjunction with the car doors so that elevator
can not operate unless doors are closed.
Overload indicator with buzzer, if the car is oberloaded it shall prevent from
starting. The blinking overloaded indicator and the sounding buzzer shall signal
the over load condition to the passengers emergency light with trickle charger.
Car Operating Panel Board:
it shall be of stainless steel, flush mounted in the car enclosure and shall contain
the following:-
ƒx Illuminated micro push buttons for car calls.
ƒx Door open and door close micro push buttons.
ƒx Emergency calls micro push buttons.
ƒx Digital indicator with direction arrows.
ƒx Interphone.
ƒx Over load warning (light & buzzer).
ƒx Fireman service indicator.
ƒx Car position indicator.
ƒx Service cabinet with lock contains stop switch, maintenance switches, light
switch, fan switch, door cut off switch, V.I.P switch¡Ketc.
Sub-operating panel board shall be provided for lifts with 12 persons or
more.
Indicators and Control Stations:
to be provided in each car as specified under contact accessories.
Emergency exit:
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each elevator shall have emergency exits conforming to applicable codes
specified elsewhere.
All emergency exits shall be provided with electric contacts to prevent the
operation of the elevator when the exit door is open. The exit door shall be easily
openable from on top of the car without using any tools.
Padded covers:
provide one set with each type of lift to protect car finishes from damageat time
lift is used to carry freight. Provide hooks for hanging padded covers.
2.10 AUXILIARIES
- Guide rails:
- to be highest quality steel T-sections connected with steel splice plates. Guide
surfaces are to be accurately machined and polished.
- When length exceeds 30m provide means to absorb rail expansion and structure
settlement.
- Guide Rail Fixinges:
- are to be heavy steel brackets with metal inserts built-in guide rail and fixings are
to be capable of withstanding sudden application of safety gear under maximum
load.
- Counterweight: to be structural steel framw fitted with cast iron sub-weights
secured with tie rods. Weight is to equal total car weight plus 40 to 50 ro percent
of ontaracty
- To be screened to a height of 2m from bottom of pit and-fitted with renewable
guide shoes at top and bottom.
- Supspension Ropes:
- special acid quality steel or high grade tractions teel with a safety factor as
specified in B.S. 329, ASE Code A17.1-1960 or equivalent standard.
- To be securely attached to car and counter weight and are to have independent
means of adjustment. There is to be a minimum of two ropes each with a
minimum 8 strands.
- Provide test certificates of compliance with the appropriate Code and/or standard
prior to shipment.
- Safety Gear and Governor:
- mechanical safety gear is to be mounted on and securely fastened to the car frame
and actuated by a governor mounted in the machine room. Coverer is to be
directly driven by a steel cable or chain.
- Safety gear is to hold the car securely under maximum load and governor tipping
speed conditions securely under maximum load and governor tipping speed
conditions jaws of the gear are to engage the guide rails through self-aligning
shoes with surface carefully machined parallel to guide rail face pressure of the
two guides is to equal.
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- Safety gear is to bring the car to a stop from governor tripping speed. Method of
stopping speed. Method of stopping is to be smooth and gradual as specified
under SCHEDULE NO. 1 SUMMARY OF SYSTEM PARTICULARS.
Deceleration is to be inferior to gravity.
- Governor is to be accurately adjusted and sealed to trip the safety gear at 115 per
cent of the car's specified speed operation of governor on over sped is also to open
a switch disconnecting power from motor and brake control circuits which are to
be open before the safety gear is applied. Restoration of power is not to be
possible until safety gear has been manually re-set.
- Counterweight is to have mechanical safety gear for elevators don't start from the
lowest floor.
- Buffers:
- to be of approved design, as specified in SCHEDULE no 1A, to be installed under
each car and counter-weight.
- Compensation ropes:
- to be steel, in suitable size and number ropes are to pass under a weighted
pulley in the pit. Provide provision for equalizing tension in each rope and a
contact to switch off power to the lift when weighted pulley travels past a
predetermined limit.
2.11 DOORS
General:
landing and car door openings are to be the same size.
Open Car Entrance:
is to have sill with safety strip contact at its front edge to stop the car should an
object be caught between sill and shaft wall. Gap between sill and shaft wall is
not to exceed 10mm. Frame of opening is to have reinforcing metal at the corners
and have the same finish as the car.
Landing doors are to have smooth internal face.
Collapsible car door:
to be top hung full height, lattice type, collapsible, steel door. Main pickets are to
run on a ground edge top track on ball bearing rollers and guided at the bottom by
single channel track. Door is to give a clear opening the full width of car door is
to have a suitable handle.
Is not to be interlocked but is to have an electric contact to prevent operation of or
stop the lift unless the door is fully closed when lift is loaded.
Swinging Landing Door Manually Operated:
to be self closing by spring action.
To have interlock and safety contacts on both panel for two panel doors. Pull
handle and push plate are to be provided on outside and inside face of main door
panel respectively, with engraved inscriptions "pull to open-push to open"
To have vision window glazed with reinforced glass. Panels are to have a 90
degrees stop.
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Horizontal Biparting Manually Operated Car Doors:
to be complete with guided and accessories. Both panels are to be mechanically
linked to operate simultaneously.
To be held from top hangers or track by suspension ball or roller bearings and
guided at the bottom by gibs in a grooved sill. Doors are not to be interlocked but
are to have an electric contact to prevent operation of or stop the lift unless doors
are fully closed when lift is loaded.
Automatic Sliding Car And Landing Doors:
to be power operated type to open silently. Hangers and tracks are to be two-point
suspension ball or roller gearing type and door are to be guided at the bottom by
gibs in a grooved sill. Grooves and tracks are to be automatically cleaned by
operation of the doors.
Safety device extending the full height of each door panel and projecting beyond
the front edge is to open automatically both car and landing doors if it touches an
obstruction.
Cars are to have light-beam and photo-electric cell device to open the doors when
the light beam is interrupted and optimize time of opening and reclosing.
Are to open automatically and simultaneously when the car stops at the required
floor. Doors are to remain open for a reasonable, adjustable period and
automatically and simultaneously close as set in the lift control sequence.
"Door Open" push button is to be provided on car control panel to reverse door
closing operation but is not to open an interlocked door.
Electric Door Operator:
to be driven by electric motor to open and close both car and corresponding
landing doors simultaneously. Door operation is to be controlled automatically by
lift control system with facility to manually servers door closing operation from
car control panel. Doors are to be mechanically secured and electrically
interlocked when closed.
Device is to consist of a multi-speed electric motor driving unit mounted on car
frame, independently from car bodywork, together with necessary gears, levers
and door arms designated to achieve smooth operation of doors in both directions
door opening speed is to be higher than closing speed.
A torque limiting clutch is to prevent harm to persons caught by a closing door
but is to overcome small obstructions in the bottom guiding track.
Manual opening of doors is to be possible in the event of power failure. If car is at
landing the landing door is to open with car door. Mechanism is to reset
automatically.
With variable voltage installations doors are to commence opening whilst car is
leveling to a landing. Provide mechanical and electrical devices to ensure no
dangerous situation can occur during this period.
Architraves:
to be fixed at each landing submit sample for approval.
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2.12 Controller:
Enclosure:
to be vertical, totally enclosed cubicle type constructed from sheet steel, with
hinged doors at front and with ventilation louvers or other approved method to
ensure that inside temperature does not exceed the safe limit for the equipment.
Lift Controller:
is to include contactors, relays selectors, timing devices, transformers and all
apparatus associated with the control of the lift in the machine room. Circuitbreaker
and isolator may be wall mounted outside the cubicle, next to main supply
feeder, but opening of the cubicle door is to trip the circuit-breaker cutting off the
power supply.
Contactors:
power contactors are to be electromagnetically operated and to have carbon to
copper contacts. Control circuits are to have silver contacts. Contactors are to
close with wiping, self-cleaning action. Reversing contactors are to be
mechanically interlocked to prevent contacts for one direction closing whilst
contacts for the other direction are closed.
Insulation:
for coils and other insulated components is to be class B or better, especially for
ambient temperatures at location.
Protection:
controller is to include protection against the following
No voltage or sustained under voltage.
Over-current in any component.
Phase reversal of the power supply & over load.
Power Cut-Off:
controller is to cut off power supply, apply brake and bring car to rest in the event
of any of the above failures.
Auxiliary Supply:
control system is to operate from a rectified A.C. supply, giving 100 volts D.C. or
other approved D.C voltage. If a rectifier is used the negative terminal is to be
connected to earth.
Phase Corrector:
the elevator shall continue operating in case of phase reversal.
2.13 Electrical Equipment:
General:
comply with the requirement of other electrical substations of the specifications.
Power Supply Variations:
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equipment is to operate satisfactorily if voltage varies+/- 10 per cent and/pr
frequency varies +/-6 per cent from nominal.
Wires And Cables:
to be silicon rubber insulated reinforced 600/1000 volts grade, flame retardant.
Conductors are to be copper.
Conduits And Wireways:
enclose wiring and armoured cables in heavy gauge galvanized steel conduits or
wireways.
Earthing:
earth metal frames of lift installations as descr
2.14 Control Accessories
General:
provide necessary car, landing and other control accessories as required by the
specified control system.
Variable voltage variable frequency control:
converts A.C line current to D.C using diode converters and then reconverts to
A.C at the voltage and frequency required to move a given load at the desired
speed. The resulting precise motor control shall provide precision speed
regulation and smooth acceleration and deceleration regardless of the load on the
car. Latest power device switching shall be employed to provide an energy
efficient drive system without an annoying hum.
A digital encoder shall detect accurately the position of floor and feed back to the
control circuit.
The elevator, if stopped due to reasons other than actuation of safeties or power
failure, shall go to the nearest floor in slow speed and shall open the door.
An anti nuisance/mischief prevention feature shall be employed to prevent
unnecessary/accidental registration of car calls.
Car control panel:
to be located in an approved convenient place and to contain at least:
- Up and down illuminated arrows.
- Alarm push.
- Floor pushes for each floor served.
- Floor lights, indicating registered unanswered calls emergency stop
switch or push.
- Car cut-out service witch of key operated type, for isolation purposes.
- Attendant/passenger key operated switch.
- Door open, door close pushes.
- Overweight light and pushes.
- Intercom station (interconnected to control room).
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- Maintenance and test switches with locked cover.
Car Control Station:
is to project below bottom of car platform. Trailing control cable is to terminate at
terminal block on control station. Provide access to terminals from inside car.
Car Control Station:
is to project above car roof and contain necessary control pushes for maintenance,
a lamp with a switch and a convenience power socket.
Directional Indicators In Cars:
to be fitted at the back of car to indicate to passengers entering, the direction to
travel.
Directional Indicators at Landing:
to be installed above each car entrance, with gong to indicate arrival and direction
of travel of car arriving at landing.
Position indicators:
to be installed above entrance inside car and above landing entrance at main floor.
Position indicators:
to be a finished face place with illuminated translucent numerals.
Push Button at Landing:
with UP and DOWN pushes and illuminated arrows indicating the registered call.
Terminal landings are to have one push and one arrow. Illuminated arrow is to
switch off when call is answered.
Emergency Key:
hand to the Employer a key to open all landing doors.
Lift Bank Control Panel:
provide a control panel for each lift bank panel is to be conveniently located in the
main lift lobby. Arrangement and design of panel is to be approved. Control and
operating devices are to be properly identified by engraved signs.
Lift Bank Control Panel:
is to include:
Illuminated position and travel direction indicators for each lift of the bank.
Service switches, internal adjustment knobs etc.
Switches alarm sounder, and signal lights are required.
Fireman switch:
to be installed in a locked cabinet with break glass for each lift bank. Cabinets are
to be located at the main landing floor, in an approved easily accessible prominent
place. Red identification inscription is to be engraved on the face plate.
2.15 Control Systems:
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General:
provide manufacturer's best proven control system complying with the following
specification.
Interlock:
no car is to move unless car and corresponding landing doors are fully closed and
interlocked and it is not to be possible to open any door unless the car is stopped
behind the landing door.
Emergency Stop:
operating the emergency stop devices in any car is to bring this car to a stop
immediately, until device is reset. This is not to cancel registered calls.
Attendant Operation:
when "passenger/attendant" switch is turned to "attendant" the lifts is to be
removed from group operation and respond only to car calls. Landing calls are to
be indicated by a light inside the car. Attendant's control pushes are to become
operative.
Excess Load:
load weighing device installed in car is to prevent car from starting in either
direction if maximum loading is exceeded. Buzzer is to sound and an
"overweight" light is to be illuminated until car is below maximum load. Excess
load is to cause car to by-pass landing calls if car is loaded above normal but
within and acceptable load limit.
Fireman Switch:
operation of switch is to cancel all car and landing calls, prevent operation of door
photocells if provided and bring all cars to stop at main landing with automatic
doors open. Resetting of switch lifts
Interface with BMS:
provide an interface with BMS to perform the following:
- On/Off status contractor auxiliary movement of elevator.
- Power fail.
- General alarm on electronic auxiliary.
- Over weight alarm.
- Level position.
- Emergency stamp.
- Direction (up and down).
- Enable the prevent elevator to operate in case of fire.
- And all other monitoring, record the operation and control
Manually is not to be possible. Operation of special switch is to separate lift
control, cancel all landing calls and prevent operation of photocells of doors. Car
is to resume operation manually from car push buttons.
Push Button Control, With Or Without Attendant, With Automatic Doors:
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call push is to be provided at each landing served, together with "lift coming"
illuminated signal. In the car, a push is to be provided for each floor served,
marked with appropriate floor designation. Momentary pressure on floor push in
car or push at landing is to be registered and is to automatically close door(s) and
start lift in direction corresponding to first registered call. Lift is to then answer
registered car and landing calls in sequence in one direction and then in the other.
On arrival at required floor, doors(s) are to open automatically. After door(s) have
remained open for an adjustable time they are to close again automatically, and
lift is to answer other registered calls. Non-interference relay is to be incorporated
so that a delay of 3 to 5 seconds can be imposed on operation of car and landing
calls after car has stopped at floor. Priority is to be given to car push buttons so
that after car has stopped at floor, landing calls are rendered inoperative for 5 to
12 seconds. When on attendant operation, system is to behave as described before
in the attendant operation clause.
Collective-Selective Group Control With Or Without At-Tendant, With
Automatic Doors:
each lift group is to operate under one control system, handling calls collectively
and selectively. It is to be possible for each lift to be switched to attendant
operation, removing it from the group. Lift control system is to be so arranged
that appropriate car responds to landing calls by automatic selection, and
systematic spacing of cars is maintained to minimize delays. Direction in which
car will travel is to be determined by calls stored in system. "up" and "down"
directional call pushes are to be provided at each landing severed by bank,
together with call registered illuminated signal for each push. "up" or "down"
push only is to be provided at terminal landings. In each car, a push is to be
provided for each switched to passenger operation, calls by momentary pressure
on "floor" pushes in car or pushes at landings are to be registered in control
system and automatically and selectively cause closing of respective car door and
start car in direction of first registered call. Lift is to collectively answer registered
car and landing calls in sequence in on direction and then in the other. Having
answered all calls stored in system, one car is to return automatically to park at
main floor, with doors open, and other car(s) are to remain at floor last reached.
When any lift of a group is switched to attendant operation, car is to respond to
car calls and landing calls stored in system, but car is to start when attendant
presses "start" button. When attendant presses "pass" button, landing calls are bypassed
but remain registered. When attendant presses reverse button car is to stop
and travel in opposite direction. Unanswered calls are to remain registered. "pass
and "reverse" buttons are to be inoperative in passenger operation mode.
Supervisor System for Group Control:
lifts are to operate as one group by a microprocessor controlled supervisory
system automatically regulating movement of cars according to various traffic
requirements, classified in five conditions:
During "off-peak"
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lifts are to operate as group collective selective.
During 'up-peak':
all lifts, except one are to answer only calls, and travel directly back to main floor
immediately after all calls have been answered one lift is to also answer "up" and
"down" landing calls.
During "Down Peak"
all lifts, except one are to answer car calls, and landing "down" calls and travel
directly up to highest registered landing call immediately they become free at
main landing, one lift is to also answer "up" landing calls, down-peak operation is
to incorporate feature which automatically divides operation into two stages:
- Stage 1:
- dispatching of cars is to be modified to suit prevailing out-of-balance
demand.
- Stage 2:
- if out-of-balance trend continues of becomes more predominant a
zoned operation is to be brought in .
- During zoned operation car or cars in lower zone are in their upward
journey, to operate with high call reversal, zoned operation is to
continue until stage 2 peak condition ceases, when low cars are to
revert to stage 1 operation.
- During light traffic motor generator sets are to shut down after
outstanding calls have been answered, and for a predetermined time
when call is registered, motor generator of one is to restart when call
is registered, and others are to restart when calls become more
frequent.
- Arrangements are to be incorporated so that any one car may be left in
operation for night service dispatching system is then to be
inoperative and car is to start in response to first car or landing call.
Supervisor System for Group Control:
at least one car is to be brought back to main floor and remain there with doors
open, car lights on and this lifts sign illuminated . other cars arriving at main
floor, after all passengers have left, are to remain doors closed while there is
another car with this lift sign illuminated when first car leaves then second car
becomes this lift change-over from passenger to attendant control is to be by
switch in supervisory panel at main floor.
2.16 Loose Equipment, Spare Parts and Accessories
Generally:
supply loose equipment spare parts and accessories as required for normal
operation and routing maintenance of the systems and as detailed by the
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Contractor in his offer for spare parts and accessories. Supply is to include, but is
not limited to the following:
ƒx Loose equipment:
operating handles, emergency brake release keys and the like.
ƒx Spare parts:
one completed set of main contacts and control coil for each type of power
contactor, solid-state PC cards, contacts and control coils for each type of
control relay, two each of transistors, diodes, rectifiers, resistors etc. used
in control circuits, one complete set of indicating lamps, fused, capacitors,
circuit-breakers, contact points etc., air filters, brushes, bearings and the
like, as necessary for two years operation.
ƒx Tools and accessories:
tools and equipment required for routing checking maintenance, and test
instruments.
Identification:
parts are to be packed in sealed plastic bags with identifying labels and factory list
numbers.
PART 3- EXCUTION
3.1 Site Condition Inspection
Elevator Contractor shall verify elevator well plumb before preparing shop
drawings, and report to the Engineer any proposed modification to equipment
design to suit actual site conditions.
During construction of building structure (prior to installing elevator equipment)
examine elevator well and machinery spaces to verify that no irregularity exists
that could affect the quality of execution of the work as specified. Note:
- Elevator well dimensions and plumb. Divider beam locations.
- Support areas for beams, brackets, etc.
- Pit dimensions and drainage.
- Access means to pit, hoistway and machinery spaces.
- Suitability of power sources, illumination and ventilation.
Examine the work of other divisions, upon which the work of this section
depends, and report defects in writing to the Engineer.
3.2 Installation:
Assembly:
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as far as possible, equipment is to be factory assembled wired and tested. Limit
local installation work to installation and assembly of parts dismantled at the
factory.
Workmanship:
carry out work in a neat, workmanlike and efficient manner in accordance with
the requirements of the specification.
Manpower:
perform installation work with skilled personnel specialized in lift installation
who are in the permanent employ of the manufacturer's authorized dealer.
Accessibility:
install equipment readily accessible for operation maintenance and repair.
Builder's work:
provide all builder's work required including chases, rebates etc., grouting
supports steel work scaffolding etc., and provide convenience power lighting and
other services required from terminal points.
Co-Ordination of Installation and Building:
co-ordinate equipment installations and the building to prevent alteration to the
structure and the cutting of holes and chases in reinforced concrete.
Lift Shafts:
coordinate and ensure that the entrance shaft wall is in the same vertical plane
with the face of the landing door and that the whole face is perfectly smooth and
plane. The gap between shaft wall and car door sill is not to exceed 10mm for the
whole length of the shaft.
Fixing Light Guide Rails:
keep rails in proper alignment using steel splice plates of adequate strength.
Verticality of the rail is to be within a 0.2% tolerance. Space fixing brackets to
minimize rail vibration during operation. Spacing is not to exceed 2m.
3.3 Painting:
protect all unfinished metal work by painting unless technically undesirable
painting is to include thorough metal cleaning, application of a rust inhibiting
prime coat and two finishing coats approved enamel. After installation and final
cleaning, re-paint the non-machined surfaces as required.
Ferrous metal surfaces that will be concealed in the completed work shall receive
a factory applied primer and finish coat of rust inhibiting paint. After installation,
but before work is done to conceal the item, clean and repaint damaged areas.
3.4 FACTORY TEST:
1. The Contractor shall be responsible for performing the Elevators factory
test.
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2. The Elevators factory test shall be performed at the country of origin the
presence of the Client's, Electrical Consultant and Engineer's
representatives team. the team will comprise three representatives all
expenses are to be borne by the Contractor.
3. the contractor shall provide to the engineer a certified factory test report.
3.5 Cleaning
Prior to start of Acceptance Testing; ensure that all installation work is complete,
including:
Clean machine room, pit, top of car, and elevator well blow out controllers.
Make all wiring runs neat, and connect all spare wire to terminals.
Remove all non-permanent equipment from machinery spaces.
3.6 TESTS ON SITE
- GENERALLY:
carry out inspection and acceptance tests on site on each complete system before
final placement into service, in accordance with the regulations and standards, and
as described in the specification and required by the Engineer.
- TEST SCHEDULES AND PROCEDURES:
are to be submitted for approval and are to include details of testing equipment to
be provided
- WITNESSING:
Inspection and acceptance tests are to be carried out in the presence of the
Engineer and, when required, by an authorized representative of the local power
Authority
- VISUAL INSPECTION:
Visually check proper installation, connections and nameplate data before testing.
- INSULATION AND CONTINUITY TESTS:
Test all control, signal and power circuits and motor/drive, for continuity and
insulation resistance and record all readings.
- OPERATIONAL TESTS:
Carry out operational tests on complete systems to verify proper performance in
compliance with the specification. Operational tests are to be carried out under
normal operating conditions for not less than 3 days, and as required by the
Engineer.
- SPECIFIC TESTS:
Carry out specific tests required by the Specification and any other tests required
by the Engineer to verify compliance of the installations with the specification.
3.7 RECORDS
- GENERALLY:
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not later than the date of substantial completion, provide the Engineer with four
copies of all approved as-installed drawings, test records, manufacturers¡¦
guarantees and warranties, operating and maintenance manuals and other records
required by the specification.
- PRESENTATION:
of records is to be in A4 size plastic covered, loose-leaf ring binders or other
approved binders with hard covers, each indexed, divided and appropriately cover
titled. Drawings larger than A4 size are to be folded and accommodated in the
binders so that they may be unfolded without being detached from the rings.
- AS-INSTALLED DRAWINGS:
Prepare and submit for approval drawings showing the electrical work as installed.
Drawings are to contain the complete assembled information included on the
construction drawings, prepared in the same manner, and up-dated to indicate. the
systems, labelling, referencing, mounting methods, routing etc. as installed.
Provide the Engineer with the transparencies and four copies of the approved asinstalled
drawings.
- TEST RECORDS:
Provide test certificates of type test, work tests, site tests, commissioning and
performance tests and all other tests on equipment and installations described in
the Specification and required by the Engineer. Include information regarding test
procedures and results, conditions under which tests were carried out including set
points, temperatures and the like, dates, location and attendance by authorized
representatives etc.
- OPERATING AND MAINTENACNE MANUALS: are to contain the
following:
- Technical description of control system and item of equipment installed, written
to ensure that the Employer¡¦s staff fully understand the provisions and operation
in case of emergency.
- Diagrammatic drawings of each system indicating principle components and
items of equipment.
- Schedules of equipment installed giving manufacturer, catalogue list numbers
model and serial number, rating and characteristics, each item is to have a unique
code and number, cross-referenced to the diagrammatic drawings and layout
drawings.
- Name, address, telephone, telex and fax number of the manufacturer of every item
of equipment.
- Names, address, telephone, telex and fax numbers of equipment
agents/representative for emergency services and procedures.
- Manufacturer¡¦s service manual for each major item of equipment, including
detailed drawings, illustrations, circuit details, operating and maintenance
instructions,
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- Modes of operation, Control provisions, sequences and interlocks, and preventive
maintenance programme.
- Manufacturer¡¦s lists of recommended spare parts, subject to wear and
deterioration, and expected running period, and indicate specifically those items
which may involve extended deliveries.
OPERATING AND MAINTENANCE MANNUALS:
prepare two temporary copies with provisional record drawings and preliminary
performance data and make available at time of testing and commencement of
commissioning to enable the Employer¡¦s staff to familiarize themselves with the
installations. These should be of the same format as the final manuals with
temporary insertions for items which cannot be finalized until the installations are
commissioned and performance tested.
3.8 TRAINING
- OPERATION AND MAINTENANCE TRAINING:
before the date of substantial completion explain and demonstrate to the
Employer¡¦s maintenance staff the function and operation of the controls and other
components as necessary.
3.9 MAINTENANCE
- MAINTENANCE CONTRACT:
submit supplementary proposals for annual maintenance contracts. The proposals
should:
- Include for maintaining the installations in efficient working order including
routine and emergency service checks, adjustments, lubrication and supply
and replacement of damaged parts etc.
- Set out the terms of the offer, the work to be carried out, the guarantees of
performance and the prices for the first twelve months after substantial
completion of the work or part thereof.
- The proposals will not be considered as part of the Tender.
FOR MORE DETAILS REFER TO ELEVATOR SCHEDULE
TABLE.
END OF SECTION 14210