Geared Overhead Winding Drum
Residential Elevator Specifications

A. Hoistway

• A finished plumb hoistway of proper size and construction conforming to ASME A17.1, all applicable building codes, and the elevator layout drawings.
• Adequate supports shall be provided for fastening rail brackets as indicated on the layout drawings. Supports must withstand rail forces indicated.
• A poured pit conforming to all applicable codes, ASME A17.1, and to the dimensions indicated on the layout drawings must be provided. The pit must be designed for the impact load indicated and must be guaranteed dry and level from wall to wall.
• Knock-out in walls between the machine room/controller and elevator hoistway for routing electrical lines and for hall buttons shall be coordinated with the elevator contractor.
• All wall patching, painting, and grouting by others.
• Hoistway doors, frames, entrances, sills, and associated framing to be provided and installed by purchaser or general contractor.
• A lockable self-closing machine/governor access door with electric contact shall be provided in accordance with layout drawing.

B. Machine Room

• When a separate machine room is required, it shall be built to conform to the layout drawings, NFPA 70, ASME A17.1, and all applicable building code requirements. It shall have suitable access, a lockable door, a convenience outlet, and light switch. Machine room temperature must be maintained between 60 and 100 degrees Fahrenheit. Relative humidity not to exceed 95%.
• A telephone line to the machine room and tied into the elevator controller as per ANSI/ASME A17.1 code.
• Machine room vents as required by local code.

C. Electrical Requirements

• A 220VAC, single phase service, with neutral, to a lockable safety disconnect switch, fused with time delay fuses shall be furnished in the machine room in accordance with NFPA 70. A normally open electric interlock contact is required in the switch for battery isolation.
• A 120VAC, single phase, 15 AMP service to a lockable disconnect switch, or circuit breaker, located in the machine room shall be provided for the cab lighting in accordance with NFPA 70.

A. Operation

Operation of the elevator shall be single automatic push button or single button collective (field programmable); momentary pressure on any button will call or send the elevator to the corresponding landing providing all doors are closed.

B. Control System

A microprocessor based control system certified and labeled to the requirements of CAN/CSAB44.1/ASME A17.5 shall be provided. It shall include a motor starter with a potential relay, motor overload device, variable voltage variable frequency (VVVF) motor speed control, an uninterrupted power supply with battery charging circuit, and external relay redundancy circuits to prevent dangerous conditions as a result of a single contact failure. All circuits shall be fuse protected. All to be enclosed in a single NEMA 1 lockable cabinet.

C. Machine Limit

In addition to the normal car stopping devices, top and bottom normal limit switches, top final limit switch and slack cable switch, the driving machine will be fitted with a rotary limit switch that includes (2) independently operated contacts that are designed to disconnect power to the driving machine in the event that the car over-travels the top or bottom landing.

D. Overspeed Governor

An overspeed governor shall be provided in the overhead and a tension weight with idler sheave shall be located in the pit. The governor cable shall be ¼" dia. 8x19 traction steel and attach to the car safety device. The governor shall be designed to activate the car safeties in the event of an overspeed in the down direction. Governor shall be self resetting and be provided with means to seal the tripping speed adjustment.

E. Driving Machine

The driving machine shall be located at the top of the elevator hoistway. It shall include a two-stage ring and worm gear reducer, inverter controlled flange mounted motor, a spring applied and electrically released disc brake assembly with manual release handle, a drum with accurately machined grooves to guide and support the hoist cables, an outboard pillow block bearing to support the drum shaft, a manual lowering hand wheel, and an emergency stop switch all to be mounted on a structural steel base. Elastomeric sound absorbing isolation mounts shall be furnished between the machine base and its mounting.

F. Car Frame and Platform

The car frame shall be fabricated from structural and formed steel members, welded and bolted construction, of the cantilevered design. It shall be fitted with roller guide shoes, car safeties, and a slack cable switch that will disconnect power to the machine if a rope should be become slack or broken. The car platform shall be fabricated from 1-1/4" plywood protected with a fire retardant material.

G. Car Suspension

The elevator car frame shall be suspended by (2) 3/8" diameter, 8 × 19, traction steel cables. Cables shall attach to the car safety device with approved type wedge sockets.

H. Guide Rails

The car guide rails shall consist of (2) machined steel "tee" sections, no less than 8 lb. per foot, securely fastened to the hoistway structure with steel brackets. All rail end sections shall be tongue & groove type joined with steel splice plates.

I. Car Operating Panel

Car operating panel shall consist of metal lens call push buttons with red LED halo lighting for each landing, an alarm button, emergency stop button, light switch, and a digital car position indicator with car direction arrows all mounted onto a brushed stainless steel faceplate (brass optional). Digital C.P.I. shall be field programmable.

J. Landing Controls

Landing control stations shall consist of a metal lens call button and a "car here" indicator with red LED halo lighting mounted onto a brushed stainless steel faceplate (brass optional).

K. Hoistway Doors

The general contractor or owner is to furnish (elevator contractor may opt to furnish) and install hoistway doors, frames, hinges, and passage sets at each landing. The type and installation of the doors and frames must comply with ASME A17.1, all state and local codes and as per manufacturer's layout drawings.

1. Door Locks

An approved/certified electro-mechanical unit system contact and lock shall be furnished for each hoistway entrance. The interlock device shall prevent elevator operation unless all doors are closed and locked and prevent opening of a door when the car is not at that landing.

L. Car Door(s)

The car door(s) shall be solid panel construction accordion type folding door(s) that prevent a person's hands or feet from extending through openings. Finish shall be vinyl laminate chosen from the manufacturer's standard color selections (hardwood, visifold, and alumifold optional). Car door shall be equipped with an approved/certified positive contact switch to prevent elevator operation with the car door(s) open (power car door(s) optional).

M. Car Enclosure

The cab walls shall be constructed of ¾" minimum plywood substrates faced with plastic laminate or wood veneers with wood trim accents as selected from the manufacturer's standard designs. A brushed stainless steel handrail (brass optional) shall be located on one wall. A telephone shall be furnished in the elevator cab for emergency communication. Cab ceiling shall be a minimum of ¾" thick substrate with at least a (2) bulb light fixture as selected from the manufacturer's standard ceiling designs. Finished flooring covering is to be furnished by others.

N. Electrical Wiring

All wiring and electrical materials shall conform to NFPA 70 and with all applicable codes. Insulated wiring shall have flame-retardant and moisture proof outer covering and shall be run in conduit or electrical wireways as required. Traveling cables shall be flexible and suitably suspended to relieve strain.