Lift & Escalator
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LIFT AND ESCALATOR
PHU QUOC/LIFT&ESCALATOR MTS/1/1
SECTION 1 - LIFTS
1.1 Codes and Standard
The lift installation shall be designed, manufactured, installed and tested in full conformity with the current versions of the following rules, regulations and standards and their amendments:
a) EN 12015 Electromagnetic Compatibility Product Family Standard for
Lifts, Escalators and Passenger Conveyors - Emission 1998; b) EN 12016 Electromagnetic Compatibility Product Family Standard for
Lifts, Escalators and Passenger Conveyors - Immunity 1998;
c) EN 81 Safety Rules for the Construction and Installation of Lifts, Part 1 1998Electric Lifts.
d) ISO/TR 11071 Comparison of Worldwide Lift Safety Standards, Part 1:
1990Electric Lifts (Elevators) e) ASME A17.1 Safety Code for Elevators and Escalators1996
The technical specification below is complementary to the above codes and standards. Where there are differences in requirements, the more stringent requirements shall apply.
1.2 Quality Requirements
1.2.1 ISO 9000
All lifts supplied shall be manufactured to relevant ISO 9000 quality standards or equivalent standard.
1.2.2 Local track record
The make/model of traction lift similar to that supplied under this subcontract shall have no less than five years local track record of reliable service. The make/model of machine room less lift similar to that supplied under this subcontract shall have no less than two years track record of reliable service. In addition, the tenderer shall have proven track record in the maintenance of the specific make of lifts offered for a period of not less than five years.
1.2.3 Type Tests
Type Test Certificate issued by approved authorities or classification agency shall be submitted for the following:
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a landing door locking devices;
b safety gears;
c overspeed governors;
d buffers; and
e emergency battery operated power supply.
1.2.4 Technical Support
The Subcontractor shall have a proven team of maintenance staff in their direct employment to provide first class maintenance service and other technical support for the lift offered. It is required that the maintenance organization has a quality assurance system.
The Subcontractor shall provide prompt emergency service to restore lift service in the event of faults and to rescue passengers in man-trap situation. The Subcontractor shall be deemed to have allowed in his tender price for the provision of such services during the Defects Liability Period.
In addition, the Sub-Contractor shall be required to provide standby attendance service comprising two-man team when requested. Payment for standby services will be based on rates listed in the Schedule of Rates.
The detail organization chart of the team shall be submitted with the tender proposal. The tenderer shall also submit a listing of installation maintained by them highlighting the maintenance arrangement (eg. comprehensive).
1.2.5 Permits and Inspections
The Subcontractor shall obtain all necessary permits and approvals from the appropriate local authorities as may be necessary, and shall make arrangements for inspection and tests as may be required. He shall provide such labour, materials and equipment necessary to carry out inspections and tests.
The Lift Subcontractor shall submit to the SO a certificate confirming that the lift complies fully with EN 81, ISO/TR 11071 and associated standards. The certificate shall be endorsed by a Professional Engineer (PE). The installation, testing and commissioning of the lift installation shall be supervised by the Professional Engineer. The Professional Engineer shall submit to the SO a supervision certificate on completion on testing and commissioning.
1.2.7 Equipment/Samples Approval
The Subcontractor shall submit samples/drawings/detail specifications of the following items to the SO for approval within eight weeks after the award of the subcontract:
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a Wire ropes (hoisting and governor)
b Travelling cables
c Car operating panels and call buttons
d Car and landing doors
e Landing doors inter-lock device
f Car flooring material
g All safety gears
h Door operator
i Car enclosure materials
j Overspeed governor
k Emergency battery operated power supply set
l Hall indicator panel and call buttons
1.2.8 Metric Units
All information shall be in metric units.
The lift material shall refer to Section 3 Lift Interior Finishes accordingly if it differs from other sections.
1.3 LIFT SCHEDULE
Please refer Lift Schedule for technical specification under Annex A. Note: All the lifts shall be equipped with Public address speaker, intercom, CCTV camera.
1.4 LIFT INTERIOR FINISH REQUIREMENTS
If any standard lift interior finish requirements are deviated from Special Requirements, SECTION 3 LIFT INTERIOR FINISHES SPECIAL REQUIREMENTS shall take the precedence.
2 LIFT PERFORMANCE
The lift installations under all options and normal operating conditions shall achieve the following performance standards. The Subcontractor shall provide all necessary equipment and manpower to measure the performance of the lift installation.
2.1 Vertical and Horizontal Vibration
The vibration level of the lift shall not exceed 10 gal (1 gal = 1 cm/sec2) peak-to-peak measured at the contract speed of the lift from the middle of the car floor.
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2.2 Acceleration and Deceleration
The acceleration and deceleration of the lifts shall not exceed 1.1 m/s2 and shall not be less than 0.7 m/s2.
2.3 Levelling Accuracy
The levelling accuracy of the lift shall be within +/- 5 millimetres regardless of load or direction of travel. The automatic levelling system shall correct for rope stretch.
2.4 Noise Level in Lift
For lift, the noise level measured in the lift car, with the ventilation fans operating, shall not exceed 55 dBA measured at the contract speed of the lift.
2.5 Noise Level in Machine Room
The noise level shall not exceed 70 dBA measured at 1 metre from the lift machinery.
3 LIFT MACHINE
Each lift shall have its own machine. The method of drive shall be by traction, i.e. sheaves and ropes or other proven mean of suspension. The lift machine shall incorporated radio interference suppression.
3.2 Traction Lift Machine
Each lift machine installed in the lift motor room shall include an electric driving motor, traction sheave, electromagnetic braking system and gears (if any), all mounted on a common steel bedplate. The lift machine shall employ a variable speed control system for precise speed control of the a.c. or d.c. motors in response to load changes. The appropriate speed shall constantly be administered regardless of load to provide an extremely smooth operation with minimal noise and vibrations even at high speeds. The machine shall be mounted on steel beams or channels with necessary bearing plates. The steel beams or channels shall be securely fastened to the reinforced concrete supports provided by the main contractor. The electric driving motor shall be of the three-phase squirrel cage induction type (for a.c. motor) or shunt field type (for d.c. motor) purpose built for reliable lift operation. Other approved type of motor (eg accepted by, EN/BS) shall be accepted but fill details must be submitted with tender submission. The machine shall incorporate a tacho-generator velocity feedback control where necessary.
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The machine shall include DC link Filter or Harmonic Filter to suppress the total Harmonic Distortion in the mains by limiting the level of ripple in the DC link. The Total Harmonic Distortion (THD) shall not be more than 10 % and comply with EN81, ISO/TR 11071 standards.
3.3 Machine Room-Less Lift Machine
The lift machine shall be located within the hoistway and mounted on the car guide rail or other approved mounting method furnished by the contractor. Mounting method shall be submitted with tender submission. These shall include an electric driving motor, traction sheave, electromagnetic braking system or equivalent and gears (if any). Mounting of the hoisting machine shall incorporate isolation to minimize the transmission of noise and/or vibration to the building structure. The lift machine shall employ a variable speed control system for precise speed control of the a.c. or d.c. motor in response to load changes.
3.4 Traction Sheave
The traction sheaves shall be of best close grained cast iron or steel, free from all defects. Grooves of the traction sheave shall be properly and accurately machined to ensure absence of slipping under all conditions of lift operation and minimum wear of ropes. In the use of overhung traction sheaves, effective precautions shall be taken to prevent the following: a the ropes leaving their grooves; b where the machine is not above the hoistway, objects lodging between the
grooves and the ropes. These precautions shall not prevent examination and serving of the traction sheaves.
3.5 Machine Brake
The machine brake shall be capable of stopping the machine when the car is travelling at its rated speed whilst carrying 125 % of the rated load. The components on which the brake operates shall be coupled to the traction sheave. In normal operation, a continuous flow of electrical current shall be required to maintain the brake in off position. No earth fault, short circuit or residual magnetism shall prevent the brake from being applied when the power supply to the lift motor is interrupted. The sub-contractor shall provide mean for emergency operation to bring the car to the nearest landing in case of power failure. The sub-contractor must submit details of such operation and the method of brake release at the time of tender.
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The brake linings shall be made of renewable incombustible material and shall be so secured to the brake shoes that normal wear will not weaken the fixing.
3.6 Worm and Gear (applicable to Geared Machine only)
The worm shaft shall be provided with thrust bearings with self-aligning blocks designed to take the end thrust of the worm in both directions. Thrusts shall be removable without dismantling the machine. The worm and worm shaft shall be integral and formed from a single forging. Lift gearing designs such as ratios between the effective pitch circle diameter of the worm wheel and the diameter of the traction sheave, accurate control of the tooth form and surface finish and control of the backlash between the worm and worm wheel teeth shall be selected on the basis of recognised manufacturing standards that have been proved satisfactory by the lift manufacturers. The worm and worm wheel shall be enclosed in a cast iron, oil tight housing, fitted with drain plug, oil level indicator, inspection opening and efficient gland, suitable arrangements shall be made to prevent the oil from seeping across the gear spider to the driving sheave.
The controller or the control cubicle shall comply with the general requirements and be constructed in accordance with BS 587 mounted in a ventilated steel cubicle with hinged doors at the front and removable hinged panels at the rear, in which all contactors, solenoids, relays and motor starting equipment shall be fitted. Where the machine room is restricted, fully front access cubicle shall be used for installation against wall. All doors shall be provided with dust-proof gaskets. Removable gland plates shall be provided at the top and bottom of the control panel for terminating incoming and outgoing circuit cables. For machine room less lifts, the controller or the cubicle shall comply with the general requirements and be constructed in accordance with BS 587 installed on top of the hoistway with a hinged doors at the front in which all contractors, solenoids, relays and motor starting equipment shall be fitted In addition to the general requirements as stated in BS 5655 Part 1, the controllers or control cubicle shall be: a Floor standing type and constructed of heavy gauge steel angle frames,
treated with rust inhibitor, painted with anti-corrosion primer and two coats of stove enamel paint. Frames shall be welded joints with edges rounded off.
b Manufactured, factory assembled and tested by the lift manufacturer. On site assembly is not allowed.
c The cubicle shall be built to IP 42 requirements. d Rigidly bolted to floor and properly levelled. Contacts shall be designed to ensure maximum conductivity; they shall have a wiping action to prevent sticking and fusing. Time delays in the circuits shall be of acceptable design and to be reliable and consistent. Condenser and electronic timers are also acceptable.
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All cables shall be adequately identified with colour, number coded and labelled or by means of an approved identification method. The wiring lists showing the wiring runs shall be displayed on each controller in waterproof protection cover. These contents shall be neat and legible. The audio, video and electrical cables in the lift machine rooms shall be terminated at a separate enclosed external terminal block mounted on the controller. Where there is more than one controller in the common lift machine rooms, all such wiring shall be brought to one common terminal block clearly marked for the purpose. The controller shall be fully tropicalised and shall be resistant to condensation. It shall be suitable for proper operation under ambient temperature up to 40 deg C. Controller and other necessary control equipment shall be housed in the machine room. For machine roomless lifts, the controller can be installed inside the lift shaft. Emergency Release Panel shall be installed outside the shaft. As minimum requirements, the control systems shall include speed regulator, accelerating control, selector and loading control as appropriate. The control systems shall be entirely automatic and shall ensure smooth starting, acceleration, running deceleration and stopping of each car. Suitable load weighing device to ensure smooth starting shall be provided to form part of feedback loop in control system, if required. The lift shall be equipped with an automatic stopping device to bring the car to rest at the terminal landings. Final limit switches shall be provided in the shaft to stop the car and to prevent normal operation should it travel beyond the operation zone. An automatic self-levelling feature shall be incorporated that will bring the floor landing to within the specified accuracy.
3.8 Power Factor Correction
Power factor correction capacitors shall be provided as required to correct and maintain the power factor of all motors to at least 0.85 (lagging) or better at all loads. The requirement of this power factor correction is to ensure the motor efficiency minimum 0.85 The power factor correction capacitor shall be made of metalled film polypropylene (MPP) with self-healing properties and over-pressure tear-off fuse. It shall be rated minimum 600 volts, 50 Hz.
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4 HOISTWAY AND SAFETY EQUIPMENT
4.1 Guide Rails
4.1.1 Rail Section
The car and counterweight guide rails shall be of Standard 'Tee' section steel with machined working surfaces.
4.1.2 Guide Fixings
Guides shall be held to their fastenings by through bolts only.
4.1.3 Guide Brackets
Guide brackets shall be of steel and bolted securely to the building or structure steelworks. The brackets shall be so designed and located that the rails will not deflect more than 8 millimetres under normal operation. The Subcontractor shall provide all other framework to complete the installation of the guide brackets. For single lift shaft, sub-contractors shall provide necessary trimmer beam to suit their lift installation.
4.1.4 Jointing Of Guides
The guide rail shall be of straight length. All guide rail joints shall be tongued and grooved to fit accurately to adjoining length. The guide rail shall be dovetailed at the joints and carefully aligned to assure smooth operation. All guides shall be bottomed.
4.2 Ropes, Rope Attachments and Fittings
Ropes shall not be spliced other than for the purpose of connection to the car, counterweight or anchorage.
4.3 Exhibition of Rope Data
A plate giving the number, size, ultimate strength and length of the ropes required shall be permanently fixed to the cross-head.
Counterweight and sub-weights shall be mounted in structural metal frames so designed as to retain the weights securely in place. The counterweight shall be of cast iron construction of multiple sections. The sub-weights shall be of cast iron or steel. Steel plates shall be treated for corrosion protection. The frame shall be complete with renewable guide shoes, or shoes with renewable linings, at the top and bottom of weight. The frame shall be so designed that
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sub-weights can be added or removed to effect optimum balance of the car. The counterweight shall equal to the complete car weight plus approximately 45%-50% of the rated load.
4.5 Safety Equipment
The safety equipment shall include but not limited to overspeed governors, safety gear, electrical protective devices, interlocks and control, emergency power operation etc.
4.5.2 Overspeed Governor
A centrifugal type overspeed governor shall be provided for each lift with a tripping speed set in accordance with British Standard 5655 or approved code. The electric safety device actuated by the overspeed action of the governor shall cut off electricity supply to the traction machine prior to the mechanical tripping of the governor. Overspeed governors shall be type tested.
4.5.3 Car And Counterweight Safety Gear
Lift car shall be provided with instantaneous or flexible guide clamp type safety gears. The safety gear shall be installed in accordance with the gear manufacturers recommendation. Safety gears shall be type tested. Safety gears shall be provided for counterweight where the space below the hoistway is used as a passageway or usable space or if required in the Schedule of Equipment. All safety gears provided shall be type tested.
5. LIFT CAR
5.1.1 Car Frame
The car frame shall be of structural steel section, securely gusseted, braced, welded and/or bolted together. It shall be of ample strength and rigidity to withstand the operation of the safety gear or any condition of loading without permanent deformation to the car frame and to relieve the car enclosure of all strains. The safety factor for these frames shall be of not less than five (5). The frame shall be primed with anti-rust primer and painted. The frame members shall be blast-clean to the painting system manufacturers recommendation before application of the painting system.
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5.1.2 Car Platform
Car platforms shall be of structural steel construction with steel flooring. The platform shall be designed on the basis of the contract load being evenly distributed with a minimum safety factor of five (5). The structural steel frame of the car platforms shall be primed with anti-rust primer and painted. The steel members shall be blast-cleaned to the painting system manufacturers recommendation before application of the painting system. The car platform shall be properly isolated to prevent the transmission of noise and vibration from the car frame to the car platform.
5.1.3 Top Emergency Exit
The emergency exit panel shall be equipped with an electric contact so located as to be inaccessible from inside the car. The electric contact prevents the operation of the lift when the panel is open.
Lift car shall be ventilated to a minimum standard of 15 air changes per hour using one or more fans of appropriate capacity, located above the suspended ceiling or recessed in the car ceiling as appropriate. Only low speed fan of the low noise, axial or radial blower type shall be used. The noise from the fan, measured at a height of 1.5 metre from the floor within the lift car shall not exceed 55 dBA with all fans operating. The effective area of ventilation apertures shall be at least 1% of the car platform area.
The illumination level on the floor of the lift car and the car operating panels shall be not less than 150 lux with the car doors closed. Unless stated otherwise, energy saving fluorescent fittings with low loss ballast shall be used. Indirect lighting may be used subject to the approval of the SO.
5.2 Lift Doors
5.2.1 Car and Landing Doors
Except where fire-rated doors are required, car and landing doors shall be formed of at least 16 gauge steel of flush construction and shall contain suitable materials for sound deadening. The doors shall be reinforced, providing with keyways for interlocks. They shall be thoroughly cleaned, free of rust and treated with a rust-inhibitor prior to painting.
5.2.2 Door Hangers and Tracks
Both car and landing doors shall be fitted with sheave type door hangers. The sheave wheels shall be tyred with a sound reducing material and shall rotate on a grease
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packed precision ball bearing. The upthrust of the door shall be taken by a roller mounted on the underside of the hanger track. The roller shall be mounted on an eccentric stud to provide for adjustment. The hanger tracks shall be of either formed cold rolled steel or cold drawn steel of heavy section with surfaces shaped to conform to the tread of the hanger sheaves and rollers. Suitable means shall be used to transmit motion from one door panel to the other.
5.2.3 Door Operator
Door operator for car and landing doors shall consist of alternating current or direct current motor, operating mechanism, linkages and switches to give adjustable or variable speed of door operation and shall be adjusted to ensure smoothest, fastest opening and closing possible. The car and landing doors shall operate simultaneously and quietly while the lift car is levelling. For lifts on "Without Attendant" control, the doors shall close after the expiration of a pre-set time interval or when a car call is registered. The "Door Open" button shall re-open and reset the door opening time when pressed. The "Door Close" button when pressed shall close the door immediately regardless of the time interval.
5.2.4 Door Safety Devices
Unless specified otherwise, the lift doors shall incorporate:
5.2.5 Multi-beam Light Ray Device with 3 dimensional operation
The safety detectors shall consist of two independent detection systems. (1) Multi beam light curtain beams operating between the lift doors.
(2) 3 Dimensional Detection - Infra-red proximity detection operates in front of
the landing zone.
Any interruption of the direct infra-red beams across the lift door opening or any reflection within the 3-dimensional zone will trigger the system and re-open the lift doors A light ray type car door protective device shall utilise a multi-beam array covering the entire door height.
When in the full open position, the doors shall not close if one or more of the beams are interrupted by a person or object. If one or more of the beams are interrupted while the doors are closing, the doors shall stop and reverse to reopen. The doors shall re-close after a pre-set time (which shall be programmable).
If the doors are prevented from closing for a pre-set time (which shall be programmable), the device shall be rendered inoperative and the doors shall be close at a reduced speed. While the doors are closing, a loud buzzer located in the car shall sound.
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Microprocessor based controller shall provides a diagnostic read-out in case of any fault or failure to the safety detection system. The controller runs a diagnostic check and displays the location of any faults on the Single Character LED Display.
The system shall revert to fail safe mode in the event of a system fault or the loss of supply voltage and will remain permanently triggered until the fault is cleared. The system shall allows up to 5 non-adjacent infra-red beams to be ignored for a pre-set time (10 - 70 seconds), set by a potentiometer. After this period expires the trigger will be ignored allowing the lift doors to close. The system shall operate from -10C to 65C and up to 95% relative humidity at 40C.The system shall comply to: Electromagnetic Emissions: EN50081 Part 1 & Electromagnetic Immunity: EN50082 Part 2
5.2.6 Reserved Number
5.2.7 Nuisance prevention
If the doors are prevented from closing by the pressing of hall and/or car buttons or a person in the path for an adjustable pre-set time, the doors shall proceed to close at a reduced speed and a buzzer located on the car shall sound before and during the closing.
5.3 Car Operating Panel
Unless specified otherwise as indicated in the tender drawing, each lift car shall be fitted with one primary and one secondary car operating panel flush mounted on the front return panel. Where handicap facilities are specified, car-operating panel shall be provided in accordance with the handicap requirements. The car operating panels and the car call buttons shall be ergonomically designed and of robust construction to the SO's approval. The faceplate shall be made of 2 millimetres thick brushed stainless steel of grade 304. The primary car operating panel shall incorporate, but not be limited to, the following: a An alarm button in red which, when pressed, shall activate the battery operated
alarm to sound the alarm bell situated at the lift lobby.
b A set of car call buttons bearing numerals for floor. The buttons shall preferably be located between 900 to 1200 millimetres from the car floor.
c A 'Door-Open' button which, when pressed, shall cause the closing doors to re-open or when continuously pressed, shall keep the door open.
d A 'Door-Close' button which, when pressed, shall cause the door to close to
shorten the door open time.
e A red "Car Overload" indicating lamp with buzzer.
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f An Intercom button which, when pressed, shall allow direct communication as
g A capacity plate engraved onto the car operating panel shall indicate the rated load in kilograms and the maximum number of passengers to be carried. The size and design of the lettering shall be subjected to the approval of the SO.
The secondary car operating panel shall incorporate (a) to (e) above. Each micro-movement button shall have a raised feature to make function selection easier. The response light shall be colour when illuminated. ISO recommended colour-coded symbols shall be used. The following key operated switches or seesaw switches shall be provided housed within the key-switch operated cabinet incorporated in the primary car operating panel: a One or more switches whereby the following modes of operation can be
effected as desired:
(i) Fully Automatic without Attendant operation. (ii) Automatic with Attendant operation including all necessary button
control. (iii) Single-Car Independent operation whereby the particular lift can be
removed from the group control operation and operated independently with attendant (applicable only to lift under group supervisory control).
b An "ON/OFF switch whereby the ventilation fan can be switched on or off.
c An "ON/OFF switch whereby the lift car lighting can be switched on or off.
d For goods lift, a "Hold" switch shall be provided. This switch when operated will
keep the door over prolonged intervals for loading purposes. .
5.4 Hall/Car Position Indicator
The faceplate of the hall/car position indicator shall be made of stainless steel grade 304 hairline-finished. Floor numbers shall be digitally displayed using characters of height not less than 50 millimetres. There shall also be an arrow indicating car movement direction. The surface of the display unit shall be of non-glare type. A user-friendly equipment complete with software for creating and editing messages shall be provided at the Airport Operation Centre (AOC). Different message shall be able to be programmed for each lift through these equipment install at the AOC. The programme can also be carried out for different groups of lifts. Below are the various display to be installed in the lift car and hall landing as indicated in the schedule of lift: -
5.4.1 Monochrome LCD Display
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The display shall be designed for the lift application to provide monochrome graphical representation of lift position, directional arrows, date and time and real time messages. It shall come with standard symbols including directional arrows, floor legends, floor directories, digital clock, date, lift messages like MAINTENANCE, OVERLOAD, OUT OF OREDR, FULL LOAD, etc. The display shall be able to configure to receive and display messages from a remote computer through the interface indicated below.
Viewing Area 120 (W) X 64 (H) or indicated
Resolution (pixels) 240 x 128
5.4.2 Dot Matrix Display
The display shall be designed for the lift application to provide LED graphical representation of lift position, directional arrows, date and time and real time messages. It shall come with standard symbols including directional arrows, floor legends, floor directories, digital clock, date, lift messages like MAINTENANCE, OVERLOAD, OUT OF OREDR, FULL LOAD, etc. It shall be capable of containing 20 characters to accommodate for message and graphical. The message shall be made to scroll/blink if necessary such as the display cannot accommodate full message or required to capture attention of passengers. The display shall be able to configure to receive and display messages from a remote computer through the interface indicated below.
Viewing Area 566 (W) X 75 (H)
No of LED dots 16 rows x 120 columns
Dot size / Diameter mm 2.7
Dot Pitch mm 4.65
5.4.3 Full colour LCD Display
The display shall be designed for the lift application to provide high resolution colour graphical representation of lift position, three- directional arrows, date and time and real time messages. It shall come with standard symbols including directional arrows, floor legends, floor directories, digital clock, date, lift messages like MAINTENANCE, OVERLOAD, OUT OF OREDR, FULL LOAD, etc. Information like weather forecast, flash news, etc shall be able to send to the display unit through a computer system at the Airport operation centre. The message shall be made to scroll/blink if necessary such as the display cannot accommodate full message or required to capture attention of passengers. The display shall be able to configure to receive and display messages from a remote computer through the interface indicated below. The display shall be also able to display at least four languages eg, English & Vietnamese etc.
Viewing Area 211 (W) X 158 (H)
Resolution (pixel) 640 x 480
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5.5 Car Top
The following provisions shall be provided at the lift car top: a "Slow Speed" or "Hand" operation for service and maintenance purposes
whereby the lift can be made to travel at the standard reduced speed of approximately 0.5 m/sec.
b Safety stainless steel railings of 1 metre high shall be provided on three sides on the car top as a safety feature for personnel working on the car top. For glass lifts, the safety railing shall be collapsible type
c One or more metal-clad 3-pin shutter-type 13 Amp metal clad surface mounted switch socket outlets with integral 30 mA RCD shall be supplied and installed at the top of the each lift car.
d A fixed lamp receptacle, suitably protected with separate switch.
5.6 Car Load Weighing Device
Each car shall be provided with approved automatic load weighing device arranged to: a Prevent an overload car from starting and to energise an overload indicator
and buzzer in the car operating panel to indicate overloading; b Automatically bypass landing calls when the car is filled to 80% of full load; c Compensate the motor field so that the motor torque shall be constantly
regulated with respect to the varying passenger load to provide the best riding comfort. The electronic field compensation control shall minimise the starting and stopping jerks.
5.7 No-Smoking Notice
A 'SMOKING IS STRICTLY PROHIBITED' sign shall be supplied and surface mounted on the front return panel in each lift. The size and font of the lettering shall be subjected to the approval of the SO.
6. HALLWAY EQUIPMENT
6.1 Landing Doors
6.1.1 Fire Resistance Rating
Landing doors shall have the degree of fire rating of not less than one hour. These doors shall be Relevant Approved Authorities tested and approved.
6.1.2 Door Frames
Door frames shall be of at least 14 gauge steel and shall comprise of head and jamb sections of the same material. The door frames and angle steel brackets shall be suitably braced and reinforced. The frames shall be provided with adjustable wall anchors or comparable devices to permit bonding of these anchors or devices into the walls after the frames are in place.
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All frames shall be securely fastened to sills and hanger supports, and shall be returned on the hoistway side to present a neat appearance.
6.1.3 Door Sills
a Passenger Lift
Except where specified elsewhere in the Specification (including Schedules), door sills for passenger lift shall be of extruded aluminium alloy section with a non-slip wearing surfaces. The sills shall be supported on special steel anchor plates securely fastened to the landing door sill supports. The sill support and anchor bolts shall be hot-dipped galvanised. The sill support and anchor bolts shall be provided and installed by the Lift Subcontractor.
b Goods Lift
Door sills for goods and passenger-cum-goods lifts shall be solid section aluminium. Grooves shall be machine planed with minimum clearance for the guides.
Galvanised sheet steel fascia plates of not less than 14 gauge (approximately 2 millimetres thick) shall be provided and fixed between the underside of landing entrance sills and the top of the door hanger case to form a flush surface in the path of travel at the car entrance.
6.1.5 Supports and Covers
Hanger supports shall be of sufficiently thick formed sections securely bolted to the support angles.
Structural steel angles shall be furnished and of sufficient size to accommodate the door closing equipment. The angles shall be continuous and securely bolted to the sills and the building structure. Hanger cover plates shall be made of best grade steel, removable, and so arranged to ensure hanger accessibility from within the lift car for maintenance purposes.
6.1.6 Manual Opening
Provision shall be made to open manually every power operated landing door in the event of failure of power supply, at any landing at which the lift car is positioned. The apparatus shall be so arranged that in case of interruption of failure of electricity supply, the doors can be opened by hand from within the car. Three (3) sets of master landing door access key for opening the doors at the landing shall be provided for all lifts.
6.1.7 Locking Device
Landing door locking device shall be type tested.
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6.2 Hall Call Buttons
One set of hall call buttons shall be provided for each lift at every served floor. The set of buttons shall be installed on the wall adjacent to each lift landing. Unless specified otherwise, the faceplate shall be made of stainless steel grade 304 hairline finished. The hall call buttons shall be micro-movement type. The response light of the call buttons shall be orange or red in colour when illuminated. When a lift arrives at the hall, the illumination shall cease. Where two or more hall call buttons serve a group of lifts, they will all be illuminated when any call button is activated.
6.3 Hall Lantern
One set of hall lanterns shall be provided for each lift at every served floor. The set of lanterns shall be installed on the wall adjacent to each lift landing. Unless specified otherwise, hall lantern is not required for single lift installation. The hall lantern shall incorporate a chime. Electronic chime sounds to indicated the cars arrival to the hall should be mounted on each landing floor. The hall lantern shall begin flashing and the chime shall sound a few seconds before the arrival of the lift. The response light of the "Up" and "Down" indication lanterns shall be colour respectively when illuminated. The colour shall be subjected to SO approval.
6.4 Car Position Indicator
Where specified, car position indicator of programmable type shall be supplied and installed at the lift landings. The display panel shall be interfaced independently with the Operating System. For more detail, refer to car position display at the lift car section.
6.5 Numbering of Lift
Where the buildings have more than one lift, every lift shall be consecutively numbered at every landing by the Subcontractor. The Number Signs shall be made of stainless steel grade 304 hairline-finished. They shall fit into the designated space as shown in the drawings or as directed by the SO. The font shall be subject to SO's approval.
7 LIFT PIT
The following shall be provided by the Subcontractor in the lift pits: a An emergency stop switch shall be located in the pit accessible from the pit
access door for each lift; b A metalclad surface-mounted 13A socket outlet; c Lighting. The lighting level shall be not less than 100 lux. Power supply shall be taken from the lift machine room.
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Counterweights shall be guarded by means of rigid screen extending from a position 300 millimetres above the lift pit floor to a height of 2100 millimetres. Buffers shall be type tested.
8 INTER-COMMUNICATION SYSTEM
The lift inter-communication system shall have two-way communication between lift car, machine room, Fire Command Centre (FCC) and Airport Operation Centre (AOC) at Ground Level. The Sub-Contractor shall provide intercom system which consist of a master station, sub-master stations and slave stations arrange as follows: - i) To provide a link from the intercom system to the lift monitoring system ii) A master station in the FCC for communication with slave stations in the lift
cars and sub-master system in the lift motor and AOC. iii) The master station and sub-master station intercom shall be push-button hand
phone type comprising of a receiver set, transmitter set and selector buttons for communication with slave station.
iv) A slave station shall be provided in each lift for communication with the master and sub-master stations. A slave station shall consist of a speaker set and a transmitter set.
Multi-way communication system shall allow communication between control panels located at respective lift machine rooms /lift cars and combination group indicator/control panel located in the FCC and AOC. Communication may be initiated either from lift car by pushing the Interphone or Alarm button on the car operating panel, or from Fire Command Centre, supervisory room or machine room by pushing SELECT button on the master unit after picking up the handset. When the master or sub master is receiving a call. It will indicated by a visible call light lamp (light to indicate which car is calling) and a audible buzzer. The call lamp should continue to illuminate until the handset is returned back to the housing. The system shall be equipped with back-up battery.
9 LIFT FUNCTIONS
9.1 Lift Functions
All lift shall be provided with the following functional features: a Automatic Door-Open Time Adjustment
Depending on whether the lift car stops in response to a car or hall call, traffic condition and the floors specified, this function shall automatically adjust the time the doors stay open.
b Door Nudging Feature
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If the lift doors are kept open longer than the pre-determined time, an override alarm shall sound to alert the passengers that the doors must close so that system performance is not adversely affected.
c Automatic False Car Call Cancelling When the number of car calls registered does not correlate with the car load, all car calls shall be automatically cancelled to avoid unnecessary nuisance stops.
d Safe Landing A diagnostic system shall be provided to automatically locate the source of malfunction and determine a safe lift operation if the car stops between floors. Once the operation is determined, the car shall proceed to the nearest floor at reduced speed and then open the doors.
e Next Landing The car shall automatically proceed to the nearest floor with functioning door if the car doors fail to open at the destination floor.
f Door Load Detector When an object is caught in or otherwise interferes with the opening or closing of the doors, the doors shall reverse direction when an excess load is detected.
h Overload Holding Stop When the car load exceeds the pre-determined weight, in addition to an audio alarm, the lift shall cease operation with its doors open.
l Homing Service The function shall automatically home the respective lifts to the pre-assigned floors. On transporting passengers to the assigned floor, the lift would automatically home to it pre-assigned floor.
10 OPERATING SYSTEM
10.1 Elevator Operation
10.1.1 System Description
i) Elevator Operation - Single automatic operation
Automatic operation by means of one button in the car for each landing level served and one button at each landing, so arranged that if any car or landing button has been
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Up-Fall Protection: Provide a system, which monitors for unintended upward movement of the elevator system. In the event unintended upward movement occurs the system shall engage a braking system to stop a car with up to 125% of rated capacity. The main car brake, rope brakes and sheave wedges are not acceptable alternatives.
11 LIFT MANAGEMENT SYSTEM
The lift management system shall enable switching of lift operation modes by command entry at the command terminal via a keyboard. This system shall also have the ability to drive a printer to allow a permanent record of lift-related events. The system shall be installed in the AOC Room unless specified otherwise. The lift management system shall also provide monitoring and control points as indicated. The lift management system shall be provided with high level interface (compatible to BACNET) to future IBMS in the AOC room and the server for the system shall be configured as a distributed server to future IBMS server. The server shall, during any object-triggered events, allow the alarm graphics, data and objects that are displayed in the local terminal to be sent to future IBMS display terminal.
The System shall have the capabilities of displaying floor-plan screen (horizontal section of the building) and hoistway screens (vertical screen) to satisfy building specifications and requirements. The floor-plan screen shall display lifts and escalators locations in the building using precise graphics. The hoistway screen shall show movement of the lifts, hall and car call registrations, etc. and shall separately provide for each individual lift and each group of lifts. It shall be able to display real time status of the escalators. In addition to the monitoring capabilities, it shall have a user-friendly menu driven command capabilities to facilitate the system user to perform a variety of signal transfers or command functions to each lift or each group of lifts or escalators from the easy touch of the keyboard. It shall also have the ability to drive a printer to allow print-outs of various information for easier and faster access to the operation records. The Lift Management System shall consist of the following facilities: a Controller (Monitoring and Command/Monitoring Systems)
High-speed microcomputers to process various signals to and from lifts and escalators thus achieving real-time communication.
b Colour Graphic Monitor (Monitoring and Command/Monitoring Systems) High-resolution monitor of screen size not less than 21-inch to display the operation status of each lifts and escalators in floor plan screens or hoistway screens. The screen patterns shall provide all necessary information in letters
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and colours to facilitate the user supervision of building security, operation or instructions in case of emergencies. The following items shall be monitored: (i) Group Status; (ii) Floor Name; (iii) Floor Lockout; (iv) Registered Hall Call; (v) Allocated Hall Call; (vi) Car Designation number; (vii) Car Position; (viii) Car Call; (ix) Car Status (e.g. operation modes); (x) Door Status; (xi) Travelling Direction; (xii) Load Bypass; and (xiii) Alarm etc. (xiv) Escalators status: power supply, trip alarm, maintenance mode and
c Screen Change-over Switch Box (Monitoring and Command/Monitoring Systems)
A screen change-over switch box to facilitate selection of screens; floor plan screens and hoistway screens.
d Command Terminal (Command/Monitoring System)
Command inputs shall be guided by user-friendly menus and help messages on a high-resolution 21-inch colour CRT display. A keyboard shall be provided for easy entry of commands, in addition to screen selection. Commands and functions shall be divided into the following:
(i) Lift and Escalator Commands Commands that issued to particular lifts and escalators to operate the lift functions.
(ii) System Commands.
Auxiliary commands to control the system itself which include:
- Schedule Group commands Date and Time; - Set System Date and Time; - Set Screen Cycling Speed; - Automatic Log-out Time Setting; - Show Commands in Effect; - Show Scheduled Commands; - Set Operator Password; - Cancel Commands in Effect; - Cancel Scheduled Commands and
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- Printer Output On/Off etc. - Fire alarm reset
e Printer (Command/Monitoring System)
The system shall has the ability to drive the printer to allow a permanent operation record of lift-related events such as information about the lift system, signals transfer or commands to each car, etc., if required for later inspection.
f Backup battery shall be provided. The battery shall have capacity of 72 hours
g Service Floors Suspension Function (if required) This function if activated by command entry at the Command Terminals shall
suspend lift service to selected floors.
12 LIFT SUPERVISORY PANEL
A supervisory panel shall be provided at the FCC. It shall provide the following: a Lift car position b Mode of service for lifts and escalators c Source of Power for lifts and escalators d Failure/Tripping for lifts and escalators e Status of Fireman's switch f Status of Emergency Battery g Fire alarm reset key switch h Other requirements of Local Relevant Fire Authority i Commands that issued to particular lifts to operate the lifts and stop command
for the escalator.
An audio alarm shall be incorporated in the supervisory panels. The lift supervisory panel shall be subject to the approval of Local Relevant Fire Authority.
13 FIRE REQUIREMENTS
13.1 Fire Switch
Every lift designated as fire lift shall be provided with a fire lift switch toggle type, clearly marked "ON" and "OFF", at the designated level for the exclusive use of firemen in an emergency. The switch shall operate a control whereby firemen can obtain the use of the lift without interference from the landing call points.
13.2 Landing Doors
The landing doors at each landing shall be Local Relevant Fire Authority approved.
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The fins shall effectively seal the entrance to prevent ingress of smoke when the doors are closed. The fins shall be so arranged that the operating mechanism of the doors is unimpaired.
13.3 Water Protection for fire lift
The upper and side surfaces of electrical control equipment and accessories within the lift hoistway, including those mounted on the lift car, shall be protected against falling water (eg from seepage under the lift landing doors) by, for example, the provision of waterproof covers or diverting canopies that shall be so arranged that falling water is diverted away from other control equipment.
A sign with the wordings IN CASE OF FIRE DO NOT USE LIFTS shall be permanently displayed at each lift landing. The design and finishes of the notice and font of the lettering shall subject to SO's approval.
14 SPECIAL EMERGENCY OPERATIONS
The lift installation shall be provided for the following emergency operation situations:
14.1 Emergency Operations
An automatic mains failure standby generating system complying with EN 81, ISO/TR 11071 or local relevant authority requirements will be installed by the Electrical subcontractor to cover the special emergency operations described in this section and the fire lift operation simultaneously. The Fire Lift shall be energised all the time.
14.2 Power Failure Mode
In the event of power failure or power interruption, the supply to all lifts shall be automatically switched over to the emergency power supply and the lifts shall be brought to the designated floor, commencing with the Fire Lift, and shall park there with the doors remaining open until all the lifts have been brought down to the designated floor. Thereafter, lifts designated by SO shall resume operation by command entry via a keyboard at the AOC. A by pass switch at the AOC and FCC shall be provided to allow all lifts or selected lifts to continue functioning without disruption during generator testing.
14.3 Fire Mode
In the event of fire when any one or more of the fire detection devices is activated, all lifts shall be brought automatically to the designated floor, and shall park there with doors remaining open. All lifts shall automatically be rendered inoperative after it has been brought to the designated floor. Normal operation of the lifts shall be manually reset by the operation of a key switch. The operation of the reset key switch is described in this section.
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14.4 Power Failure and Fire Mode
In the event of power failure and fire, the operation of the lifts shall be in accordance with the "Emergency Operation of Lifts in the Event of Fire" and the power supply shall be from the automatic mains failure generating plant.
14.5 Reset Key Switch
A three-position key switch with positions marked "Automatic", Manual-alarm on" and "Manual-alarm by-pass" shall be provided in the Security Room for manually resetting from emergency operation (in the event of fire) to normal operation of all lifts. The functions of this switch shall be: a When in the "Automatic" operation, all lifts shall operate normally and the
emergency operations as described above when actuated will be effective. b When in the "Manual Alarm On" position, the emergency operation as
described in the sub-section "Emergency Operation of Lifts in the Event of Fire" will be manually actuated independent of the fire detection devices.
c When in the "Manual Alarm By-pass" position, all lifts shall put back to normal
operation by-passing the fire detection devices. The three position key operated switch shall be constructed in such a way that the key cannot be removed unless it is in the "Automatic" or "Manual Alarm On" position.
14.6 Automatic Rescue Device
The Automatic Rescue Device (ARD) is an automatic device which, when operated in the event of power failure, will automatically bring the lift to the next landing in the direction of travel.
In the event of power failure, the ARD shall be activated automatically to release the brake of the lift machinery, drive the lift car up or down to the nearest landing and then energise the door motor to open the door. The lift door shall remain open until resumption of power supply (either mains or generating set) in which case the lift will automatically reset to normal. If the power failure occurs when the lift is at a landing, the device shall operate to open the door only. The ARD shall not be used for any other purpose except during power failure. The levelling of the lift car under ARD operation shall not exceed 12 millimetres relative to the landing. The provision of the ARD shall not require modification of the lift design. Safety features of the lift shall be retained. The ARD will not become operative when any of the safety equipment is activated to stop the lift. The tenderer shall submit full details of the equipment offered in his tender proposal.
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15 HANDICAP REQUIREMENTS (IF REQUIRED)
Where required, lift shall incorporate handicap facilities in accordance with the EN 81, ISO/TR 11071 or relevant international standard. These features shall include the following: a Car operating panel mounted horizontally on the side of the lift car. It shall be
mounted between 900 millimetres and 1200 millimetres from the finished floor level. Where a secondary car operating panel is required, it will be replaced by the handicap car operating panel.
b In addition to the normal set of hall call button at each lift landing, an additional set of handicap hall call buttons shall be installed below the 'normal' hall call buttons at a height between 900 millimetres and 1200 millimetres from the lift landing finished floor level.
c Grab bars shall be provided on both sides and the rear of the lift car and positioned at a height of 900 millimetres from the car floor level with a space of 40 millimetres to 50 millimetres from the walls.
d An international symbol of access for the disabled shall be permanently and conspicuously displayed at each and every lift landing next to the lift entrance and in the lift car. The symbol shall be made of a 60 millimetres x 60 millimetres x 6 millimetres thick stainless steel plate with a white logo on blue background.
e Braille notations indicating the floor levels shall be incorporated next to each
button at the handicap COP and the handicap hall call buttons.
f The lift car door opening shall have a width not less than 900 millimetres.
g The closing of the lift car doors shall also be controlled by a photoelectric cell in addition to the normal requirements stipulated in the section on 'Door Safety Devices'.
h A taped voice system shall be provided for announcing the car position, opening/closing of doors, direction of travel and messages shall be provided. This voice system shall be rendered operative when the handicap car operating panel is activated.
16 ELECTRICAL INSTALLATION
All electrical works shall comply with the requirements of the relevant authorities. All equpiment shall be suitable for proper operation under normal mains supply and emergency generating set supply. If necessary, the Subcontractor shall incorporate power conditioner for the equipment at his own expense.
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The Subcontractor shall be responsible for the labelling of switch fuses and circuit breakers. Floor trunking and conduit shall be used in the lift machine room for flush installation. The Subcontractor shall provide the Main Contractor with the necessary dimensions for him to provide recesses. The trunking cover shall be heavy duty type that will withstand wear and tear without deformation.
16.2 Electrical supplier
i The electrical supply for the lift installation shall be 2330/400volts 3 phase 50 cycles AC terminating in a switch fuse in the lift motor room.
ii. The lift contractor shall supply and install in the lift motor room a completely
enclosed free standing sub distribution board (SDB). The SDB shall include SPN fuse switches or switches fuses for each lift motor, lift controller and SPN switch fuses for the equipment for the control and operation of the lift. A pilot light shall be provided to indicate the status of the main supply.
16.3 Control Cabinet
i Control gear shall be housed in a ventilated steel cabinet with hinged doors in front and removable panel at the back. The use of locally fabricated steel cabinet for this purpose shall be subject to prior approval by the S.O. Full details regarding the fabrication and assembly of the cabinet shall be submitted to S.O.
ii. All control circuits shall be protected by fuses or miniature circuit breakers. He
supply for the control circuits shall be 110V DC derived from a double wound transformer and a full wave silicon rectifier. All control circuit or devices shall be earthed on one terminal and specially designed to prevent unsafe conditions arising from possible earth fault on the external electrical equipment.
Iii Connection to and from the controller cabinet shall be made of terminal blocks
, clearly labelled and arranged so that all strands of conductors are securely clamped and undamaged. All components installed in the control cabinet shall be clearly labelled and readily accessible for inspection and maintenance purposes. Each connection within the control cabinet shall be clearly labelled by numbered identification sleeves on the appropriate cables.
16.4 Maintenance switches
Maintenance facilities shall be provided in the control cabinet which enable the lift to be controlled from the lift motor room. A maintenance switch when set to operate enable the car to bypass all landing calls, the hall lanterns not to illuminated and allow the car to run at the contract speed from the touch buttons in the car or by manual operations of the car call relays in the control cabinet. Additional switches shall be provided to allow the car run at slow speed.
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16.5 Protective devices
A circuit breaker with 3 over current releases shall be incorporated in the control panel of each lift. Surge suppression device of appropriate rating shall be provided and installed at the incoming power lines to the lift supply.
16.6 Suppression of radio and TV interference
The lift installation shall not interfere with the radio and Television reception. Interference suppression device in accordance with BS613 or equivalent t shall be supplied and installed and installed which comply with BS800 or approved equilivant with reference to the limits of such interference. In addition and without prejudice, the interference suppression device shall also comply with the radio communication Regulation 1975 Part V: Regulations of electrical interference or approved equivalent.
All wiring shall be of flame retarded and have a moisture resisting outer cover. It shall run in metal trunking and in conduit conform to the relevant IEE regulation or approved equivalent and specification for wiring installation. All DC circuits shall be installed in separate metal conduits . Cables shall not run in the lift hoistway unless they form part of the lift installation and cable shall be PVC type running in trunking or conduits. Travelling cables shall be flexible and suspended to relieve strain on individual conductors and in accordance to BS 977 or equivalent. The travelling cables connecting boxes shall be fixed on top of the lift car..
17 PUBLIC ADDRESS SYSTEM, BACKGROUND MUSIC, CCTV AND CARD
Facilities shall be provided in all lifts cars for connection to equipments supplied by other contractors the public address system, background music, CCTV camera and card reader interface. Each lift shall have its own loudspeaker unit housed in its own acoustic box, CCTV camera and card reader completely concealed in the car. Multi-core cable by other contractor conveying the Public address and background music signal, CCTV and card reader shall be terminated in the motor rooms and connection from this termination to the controllers and each lift car shall be under the responsibility of the lifts contractor. The sub-contractor shall interface with the various contractors to carry out the interfacing, testing and commissioning works.
18 TESTING AND COMMISSIONING
All lifts shall be tested thoroughly before and after the installation at site. For site testing, this shall be carried out in the presence of the SO or his representative and subject to the approval of the local Authorities. The Sub-Contractor shall provide all the
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required testing equipment and labour at his own expenses. Each and every test shall be recorded and 3 copies each of the test reports shall be submitted to the SO.
18.2 Factory Testing on Lifts
Factory testing at the Sub-Contractors plants shall include but not limit to the following: a Full load and temperature run tests on all motors and solid-state devices. b Complete functional tests on isolating transformer and ripple filter. c Complete functional tests on the Car Controller and any other tests
18.3 Lifts Site Commissioning Test
The minimum site tests to be carried out shall be as stipulated in the EN 81, ISO/TR 11071, International Standard or local relevant authority Code of Practice for Installation, Operation and Maintenance of Electric Passenger and Goods Lift and shall include the following if not already covered in the above Code: a Electrical Insulation Resistance and Earth Continuity Test for all electrical
installation to comply fully with the current edition of EN 81, ISO/TR 11071, International Standard or local relevant authority requirements.
b Tests to determine all the safety devices of the lifts at the specified contract
loads, including overspeed tests and safety Catch test. c Tests on the specified contract speed. d Complete functional tests on motors, brakes, control equipment, door locking
devices etc. e Floor leveling accuracy under full-load, half-load, no-load and any other load
as required by the Superintending Officer. f Complete functional tests on the Emergency Battery Operated Power Supply
System. g Tests on Emergency Power and Fire Operation. h Complete tests on Car/Hall Position and Directional Indicators and all
functions incorporated in the Car Operational Panel, Including the Intercom System.
i Temperature readings of machine room and equipment every fifteen minutes
for at least 2 hours or the duration of the test whichever is longer.
Contractor shall submit the following lift makers certificates:
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a A certificate declaring that lift has been designed and constructed in
accordance with those regulations in so far as they are applicable. b A certificate declaring that the designs of safety gear and oil buffers have
satisfactorily withstood type tests, including an overspeed test under full contract load.
c A certificate of HV test declaring that the insulation of the electrical parts of
all contractors landing door locking devices, terminal stopping devices car door switches and other Operating and safety devices have been tested satisfactorily in accordance with the appropriate.
d A certificate stating the diameter, construction quality and tensile breaking
strength of the hoisting rope.
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SECTION 2 - ESCALATORS
1 GENERAL 1.1 Two (2) units of escalators shall be installed as specified and shown in the Tender
Drawings. All escalators shall have a nominal step width of 1000mm and shall be rated for twenty four (24) hours a day, three hundred and sixty five (365) days a year operation (Refer escalator schedule under Annex A). The vertical rises and floors served shall be as follows:
1.2 Each escalator shall be of the cleat step reversible and slimline handrails type with
extended newels capable of operating under full load conditions for either ascending or descending passenger service and arranged to operate on an incline of thirty (30) degrees or thirty five (35) from the horizontal. The escalators shall be designed to operate quietly and smoothly at a nominal step speed of 39 meters per minute.
1.3 The escalators shall be designed to operate on 400 volts, 3-phase, 4 wires, 50 Hertz
power supply and shall be capable of operating normally and continuously without damage at 110 percent and 90 percent of rated voltage. The illumination power supply will be 230 volts single phase 50 Hertz.
The works to be carried out under this contract shall, unless stipulates otherwise, comply fully with the latest edition of the following standards any amendments thereto:
a) EN 12015 Electromagnetic Compatibility Product Family Standard for Lifts, Escalators and Passenger Conveyors - Emission 1998; b) EN 12016 Electromagnetic Compatibility Product Family Standard for Lifts, Escalators and Passenger Conveyors - Immunity 1998; c) ASME A17.1 Safety Code for Elevators and Escalators 1996; d) BS 5656 Safety rules for construction and installation of Escalators and Passenger Conveyors 1993; The technical specification below is complementary to the above codes and standards. Where there are differences in requirements, the more stringent requirements shall apply.
3.1 Escalator design shall be such that no major repairs shall be necessary for a period of 15 years or 100,000 hours from the date of acceptance assuming that inspection and maintenance are carried out as necessary. Major repairs shall consist of repairs due to causes other than those attributable to normal wear, tear or ageing.
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3.2 Escalator design shall give consideration to fire prevention, elimination of dust trapping configurations and access for routine maintenance.
3.3 In the case adjacent escalators, it shall be possible to remove or replace all
components of an escalator, without stopping or interfering with the operation of the adjacent unit
3.4 All escalator components subject to corrosion shall be adequately protected against
corrosion by primed with anti-rust primer and painted. Drip pans on interior or aerial escalators shall be designed to collect and drain off water or oil which may enter through the landings, floor plates, exposed portions of escalators or from fire suppression systems.
4 CONSTRUCTION REQUIREMENTS
4.1 Each escalator shall be a self-contained unit consisting of truss, tracks, step drive units, steps, step chains, combplates, handrails, landing deckcovers, driving machine, controller, safety devices, balustrades and all other parts required to provide a complete escalator.
4.2 In the installation of the escalators, allowance must be made for the structural
movements (expansion and contraction) of the building. The movements (mainly contraction) may be as much as 50mm and the Sub-Contractor shall ensure that these movements will not cause any deformation on any parts of the escalators.
a) Rated Load. The rated load shall be based on a live load of 290 kg/m2 of the
loading area, ie (effective width of the escalator) x (distance between supports)
b) Structural Load. For structural design purposes the calculation shall be based
on the dead weight of the escalator and a live load of 290 kg/m2.
The deflection of the escalator truss shall not be greater than 1/1000 of the distance between supports.
c) Step Load. Each individual step shall be designed to support a static load of
5 TRUSS AND TRACKS
5.1 The truss shall be of structural steel lattice - type construction for easy inspection of the interior of the escalator. It shall be designed for rigidity and be of ample strength to carry the passenger loads, the mechanism of the escalator, the balustrades and the weight of exterior covering. The upper section of the truss or the center truss shall contain the drive machine and shall be provided with a trap door.
5.2 The truss shall be supported at both ends and at intermediate supports from the
building structure on resilient supports and bearing plates. The provision of bearing plates and resilient supports shall be included in this work. Distance between the
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centre of the outermost intermediate supports and the edge of the machinery spaces shall be at least 150mm. Support shall comprise bearing plates and resilient supports design for static and dynamic loading as well as prevention of transmission of noise and vibration to the building structure.
5.3 The tracks shall be constructed of steel of proper rigidity
6 STEPS AND STEP CHAINS
6.1 The surface of the steps shall be horizontal at all positions exposed to the passengers. The step frames shall be suitably reinforced and braced to carry the step treads and the maximum load per step under eccentric loading condition without distortion. The step frames and treads shall be nonflammable material and preferably aluminum casting or stainless steel. The step riser shall be smooth, and have a low coefficient of friction, or provided with vertical grooves. Each step is provided with two rollers of minimum 75mm diameter with encased, sealed-for-life ball bearings. The steps are interchangeable against each other. They can easily be replaced without removal of skirt panels.
6.2 The step treads shall be of wear resistant with closely spaced cleats and black-
powder coated or black painted grooves designed to provide a secure foothold and comfortable standing surface, especially for narrow heels.
6.3 The left and right edges and the rear sides of each step shall be marked with yellow
demarcation cleats to assist passengers in riding the moving sidewalks correctly and safely. Approved skirt brushes side shall be provided.
6.4 The step chains shall be of the endless roller type located on each side of the steps.
The chains shall be made of high grade steel with hardened pins and accurate rollers designed to accurately engage the drive sprockets to ensure smooth operation. The step chain shall be provided with an automatic tensioning device to maintain proper tension of the step chains under varying load conditions. The chain tensioning device is easily accessible at the lower end of the escalator after lifting off the landing plates. The tensioning shaft is kept parallel by ball-prismatic guides. In case of excessive elongation or breaking of the step chains, the escalator is automatically stopped by safety switches. Those switches are provided with a mechanical lock.
6.5 To enhance safety and environmental protection the escalators shall be equipped
with a step chain which eliminates the need of regular lubrication (lubrication free type). The step chain axles, pins and bushes shall be lifetime lubricated and suitably protected and sealed against ingress of dust, dirt etc. to achieve a lifetime of minimum 8 years.
6.6 Three flat steps shall be provided at each end of the escalators.
7.1 A non-flammable aluminum or stainless steel or black moulded resin combplate of the sectional type with plastic comb edges shall be provided at the top and bottom
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landings of each escalator. The combplate teeth shall properly mesh with the cleats on the step treads. It shall be made in sections so that a section can be easily replaced without the use of special tools.
7.2 A safety device shall be provided which is individually actuated by each individual
comb segment and shall stop the escalator if any foreign bodies jam between the tread grooves and the comb segment.
8 LANDING PLATES
The portion of landing at each end of the escalator immediately above any mechanism shall be provided with removable landing plates with black powder coated or painted grooves constructed of aluminum with slip proof surface or stainless steel plate with antislip pattern to give access to the driving mechanism for maintenance purposes. These landing plates shall cover the entire area of the landings within the confines of the escalator truss arranged to receive the finished flooring and shall be supported on the truss. Landing plates shall harmonise with the combplates. Landing plates frame shall be stainless steel. These landing plates shall be constructed of fire resistant materials.
9.1 Balustrades of the extended newel type shall be provided on each side of the steps. It is an all glass balustrade with vertically arranged panels, without supports. The height of the balustrade is 950mm over the entire length of the escalator. The glass panels are separated into various sections which are assembled so as to be impact and vibration-free. The individual panels neatly meet each other without cover strips. The joints are arranged vertically to the handrails. The balustrade cladding (inner and outer decking near the skirtings) is made of stainless steel profiles with minimum 1.5mm thickness.
9.2 The balustrades shall consist of deck-boards, inner paneling, skirt panels, lighting
materials and finish as hereinafter specified.
i) Deckboards : stainless steel, hairline finished ii) Inner paneling : toughened safety glass, thickness 10 mm iii) Skirt Panels : stainless steel, hairline finished iv) Exterior panels : stainless steel cladding to Architectural Details
9.3 The skirt panel shall be designed to reduce the risk of entrapment and the material
shall be scratch and impact resistant and shall have extremely low coefficient of friction. The clearance on either side of the steps between the steps and the skirting shall not be more than 4mm and the sum of the clearances on both sides shall not be more than 7mm.
9.4 For the safety of the passenger, safety strips shall be mounted on the skirting on the
both sides of the steps to prevent shoes or other materials from being caught within the clearance between the skirting and the steps. The safety strip shall protrude outwards from the skirting by not less than 25mm. It shall be mounted in easily replaceable sections to form a continuous strip at 10mm above the noseline of the
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steps. The strip shall be in form of soft fibred durable brushes which is aesthetically pleasant.
10.1 Each balustrade shall be provided with a smooth and continuous handrail moving in the same direction and at the same speed as the steps.
10.2 The handrails shall be of the slimline traction type and provided with a tension
device. The handrail shall be free of elongation so that frequent re-tensioning will not be necessary.
10.3 The handrails shall be constructed of rubber covered canvas suitably reinforced and
made endless with smoothly vulcanised joints. The handrails shall specially formed guides except when in contact driving sheaves.
10.4 Hand or finger guards shall be provided at the point where the handrail enters the
balustrade. 10.5 Colour of handrails shall be to employer.'s approval.
11 DRIVE MACHINE, MOTOR AND CONTROLLER
11.1 Each escalator shall be independently driven. 11.2 The machine shall be designed to meet the most severe conditions of escalator
service. The drive system with variable speed drive unit shall be of high efficiency and designed especially for escalator operation. It shall be located within the escalator step band, at the upper end of the escalator or centre truss. The chain sprockets of the step band and the handrail driving wheels are directly driven by special designed escalator gear with an electric motor, flange - mounted at the gearbox. The motor torque is directly transmitted by a high efficient reduction gear (min. approx. 95% efficiency). The protection class of the electric motor shall be IP 55. The gear oil change intervals shall be at least 30.000 h. The motor shall be of ample capacity and rated to continuously operate the escalator efficiently, quietly and smoothly under all conditions of load as specified. Motor shall be drip proof with Class 'F' insulation.
11.3 Power factor correction capacitors shall be included in all the equipment supplied to
achieve at the operating point a power factor of not less than 0.85. The Sub-Contractor shall provide all the relevant test equipment to test the power factor as specified above to the satisfaction of the S.O. for those equipments which do not have power factor indicators.
11.4 All motors shall be of high efficiency type with a minimum efficiency of 95% for the
running speed range of 50% to 100% full load speed of the motor. The motor shall have a high power factor in the range of 0.85 to 1.0 for all operating points.
11.5 The machine shall be capable of being removed intact from the truss
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11.6 Each escalator shall be provided with braking compiling to International Standards or Local Relevant Authority Requirements that is spring actuated and electrically held off. The brake shall automatically bring the escalator to a halt at very constant retardation whenever the power is interrupted, a stop button is pressed, or any of the safety devices operate. The brake stopping distance shall be long enough to prevent persons from falling or being thrown to the floor.
11.7 The springs used to apply brake shoes shall be in compression and adequately
supported. 11.8 The starting current shall be limited to 3 times the nominal current. Starting must
take place with a soft start device. 11.9 The escalator must be designed in such a manner that it can be operated at
following speeds :
a) Contract Speed : 0.65 m/s
The escalator shall accelerate to nominal speed (0.65m/s) as soon as passengers are detected by means of sensors. Sensors shall be located on the ceiling or in the newel ends or at the landing plates. These shall be subjected to the employers approval.
11.10 The controller shall be provided to control the starting direction and stopping of the
escalator motor and to bring the escalator to rest in the event of the operation of any of the safety devices or should the power fails from any cause or through normal shut down
11.11 Each controller shall incorporate non-self resetting magnetic/thermal overload,
inherent no-volt release, single phasing and earth leakage protection 11.12 Controllers shall be totally enclosed in drip proof metal cabinets with hinged doors;
lock and door interlocked mains isolators and neatly finished in gloss enamel. This cabinet shall be removable from the top machine room for service and maintenance purposes. Non combustible material shall be used for controller panels and their supporting frame.
11.13 Fusible cut-outs shall be so placed and constructed that the blowing of a fuse shall
not cause short circuit between adjacent conductors. Control circuits shall be protected by fuses or equivalent means independent of the protection for the main circuits.
11.14 No control system shall depend upon the completion or maintenance of an
electrical circuit for the interruption of the power supply to the driving machinery or brake.
11.15 All control circuits shall be designed to fail to safety. 11.16 Electrical interlocking shall be provided where necessary to ensure that relays and
contactors operate in proper sequence.
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11.17 The insulation of controller wiring shall be of flame retardant type. 11.18 All wires shall be terminated by soldering or clamping in such a way that the wires
are not damaged. 11.19 Accessible terminals, suitably marked, shall be provided for connection of incoming
and outgoing cables.
12 SAFETY FACTORS
12.1 The factor of safety used in the design of the escalator trusses shall be not less than 3. The truss shall be designed that it will retain the steps and running gear if the track system fails to support them. Provision shall be made to retain all tension weights in the truss if they become loose.
12.2 Tracks shall be so arranged as to prevent displacement of the steps and running gear
if a step chain breaks. The factor of safety of tracks and step frames shall not be less than 3.
12.3 The factor of safety for driving machinery shall not be less than 8 for steel and bronze
parts, and 10 for cast iron parts. 12.4 Chains for the steps and chains or belts for transmission shall have a factor of safety
of not less 8, based on the loading of 290 kg / m2. Chains whose material of
construction is such that they would require periodical heat treatment shall not be used.
13 OPERATION AND SAFETY SWITCHES
Operating and safety devices shall be provided conforming to the following requirements:-
13.1 Starting Switches
Starting switches shall be provided at both ends of the escalator and shall be of the key- operated spring off type. These switches shall be positioned so as to enable the operator, when using the key, to see the escalator steps
These switches shall start or reverse the direction of travel of the escalator. Running directions shall be clearly indicated on the switches. There shall be no other means of starting provided
13.2 Service Switch
A main disconnect switch and fuses shall be provided within the top machinery space. The switch shall be conspicuously and permanently marked, MAIN SWITCH and shall be so located that it can be switched without passing over or reaching over any part of the machinery. The opening of this switch shall cause the electrical supply to be disconnected from the driving machine and operation of the brake.
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13.3 Emergency Stop Switches
Momentary pressure emergency stop switches having red buttons shall be located in conspicuous and accessible positions at or near the top and bottom landings of each escalator and shall be protected against accidental operation. The operation of these switches shall interrupt the power to the driving machine and activate the brake. It shall not be possible to start the driving machine by these buttons.
13.4 Speed Governor
A speed governor shall be provided which will cause the interruption of power to the driving machine and cause the brake to be operated should the speed of the steps exceed the rated speed by more 20%.
The overspeed governor is not required where the slip of the alternating current squirrel cage induction driving motor, if used, does not exceed 10% and the motor is directly connected to the driving machine.
13.5 Broken Step Chain and Drive Chain (if required) Safety Device
This device shall be incorporated as part of the tension carriage and will be provided with switches, one for each chain. These safety switches easily accessible, shall cause the interruption of electrical power to the driving machine and shall cause the brake to be operated if a step chain or drive chain breaks, or if the tension on either chain drops below or exceeds a predetermined value, or if the motion chain is interrupted.
13.6 Non-Reversing Device
A device shall be incorporated to bring the escalator to rest automatically should the direction of travel accidentally reversed whilst the escalator is operating in the ascending direction.
13.7 Handrail Safety Switches
Micro switches shall be provided behind handrail safety guards where the handrails enter the escalator newels to' interrupt the power supply to the escalators in the event of an object entering the opening.
13.8 Step and Skirt Safety Switches
Four micro switches in the skirting panels on each side of the escalator shall be provided. - These shall be located close to the upper and lower combplate tips and on the track system at the upper and lower landi