Chamberlain T User manual

Serial #

(located on electrical box cover)

Installation Date

Wiring Type

OWNER'S MANUAL

MODEL T

INDUSTRIAL DUTY DOOR OPERATOR

C2 Wiring

F A C T O R Y S E T

See page 8 for

other wiring

configurations

2 YEAR WARRANTY NOT FOR RESIDENTIAL USE

LISTED DOOR OPERATOR

41B6

MOTOR

TYPE: .................................Continuous duty

HORSEPOWER:.................1/3, 1/2, 3/4 & 1 Hp

Single or Three phase

SPEED:...............................1725 RPM

VOLTAGE: ..........................115, 220, 230 Single phase

230, 460, 575 Three phase

CURRENT: .........................See motor nameplate

MECHANICAL

DRIVE REDUCTION:.............Primary: Heavy duty

(5L) V-Belt. Secondary: #41 chain/sprocket.

Output: #48 chain (1/3 &1/2Hp) or #41 chain (3/4 &1Hp)

OUTPUT SHAFT SPEED:.....140 R.P.M.

DOOR SPEED:......................11" - 12” per sec.

depending on door

BRAKE: .................................Solenoid actuated disc

brake on 3/4 & 1Hp

BEARINGS:...........................Output Shaft: Shielded

Ball Bearing. Clutch Shaft: IronCopper sintered and

oil impregnated.

SAFETY

DISCONNECT: .............Quick disconnect door arm for

emergency manual door operation.

REVERSING EDGE:.....(Optional) Electric or pneumatic

sensing device attached to the bottom edge of door.

A REVERSING EDGE IS STRONGLY

RECOMMENDED FOR

ALL

COMMERCIAL

OPERATOR INSTALLATIONS.

REQUIRED

WHEN

THE 3 BUTTON CONTROL STATION IS OUT OF

SIGHT OF DOOR OR ANY OTHER CONTROL

(AUTOMATIC OR MANUAL) IS USED.

SPECIFICATIONS

ELECTRICAL

TRANSFORMER:.............24VAC

CONTROL STATION: ......NEMA 1 three button station.

OPEN/CLOSE/STOP

WIRING TYPE:.................C2 (Factory Shipped)

Momentary contact to OPEN & STOP, constant

pressure to CLOSE, open override plus wiring for

sensing device to reverse. See page 8 for optional

control settings.

LIMIT ADJUST:................Linear driven, fully

adjustable screw type cams. Adjustable to 24 feet.

WEIGHTS AND DIMENSIONS

HANGING WEIGHT: .........80-110 LBS.

10-1/2”

Door Height Plus 4 feet (minimum)

20-1/2”

13-1/8”

HIGHEST POINT OF DOOR TRAVEL

4”

*- For Units with Brake add 3-1/2”

(Standard on 3/4 & 1Hp models Optional on 1/3 & 1/2Hp)

PREPARATION

KEEP DOOR BALANCED. STICKING OR BINDING

DOORS MUST BE REPAIRED. DOORS, DOOR

SPRINGS, CABLES, PULLEYS, BRACKETS AND

THEIR HARDWARE MAY BE UNDER EXTREME

TENSION AND CAN CAUSE SERIOUS PERSONAL

INJURY OR DEATH. CALL A PROFESSIONAL DOOR

SERVICEMAN TO MOVE OR ADJUST DOOR

SPRINGS OR HARDWARE.

WARNING

CAUTION

WARNING

SPACER BRACKET

(Mounted Nylon Pad Side Up)

FRONT IDLER ASSEMBLY

TROLLEY CARRIAGE

L - SLOT

Master Link

Takeup Bolt

Roller Chain

Master Link

Hex

Nut

Straight Arm

Lockwasher

Hex Nut

TROLLEY ASSEMBLY

Take-Up Bolt

Trolley Carriage

Reel Chain

around Idler and

over Spacer Brackets

POWERHEAD ATTACHMENT

1. Position the track assembly on the frame of the

powerhead so that the motor side of operator is in

back (away from door ).

2. Loosely install two 3/8"-16 x 3/4" bolts and nuts in

third hole from the end of the track .

3. Align the track so that the bolts inserted in step 2

line up with the L-Slots in the frame.

4. Connect the track to the powerhead by fastening

two 3/8"-16 x 3/4" bolts and nuts through the frame

and the end holes in track. Tighten all four bolts to

secure the track to the powerhead.

TROLLEY CARRIAGE / CHAIN ATTACHMENT

1. Attach the take-up bolt to the trolley carriage

using 3/8-16 hex nuts and lock washer, as shown

below.

2. Using one of the master links, attach the chain to

the other end of the trolley carriage. Reel the chain

around the front idler shaft, over the spacer brackets,

back to the drive shaft sprocket, and then to the take-

up bolt on the carriage.

3. Using the other master link, attach the chain to

the take-up bolt and tighten to the desired chain

tension.

Chain Tension: With trolley positioned at either end

of the track, a properly adjusted chain will sag about

3" at the mid-point. If necessary, remove links from

the chain to achieve proper adjustment.

TRACK ASSEMBLY

1. Using the 3/8"-16 x 3/4 " bolts and flange hex

nuts supplied, assemble the operator track by

installing and tightening the track spacer brackets.

Position the spacers evenly over the length of the

track. NOTE: The nylon pad on the spacer bracket

should face up.

2. Using (2) 3/8"-16 x 1" bolts and lock washers,

install the front idler assembly to the second set of

holes of one end of the track. Refer to the illustration

below.

3. Slide the trolley carriage onto the track so that

the take-up bolt will be toward the operator.

Carpenter's

Level Header

Wall

High Arc

Point

IMPORTANT NOTE: Before the operator is installed, be sure the door has been properly aligned and is working

smoothly. Although each installation will vary due to particular building characteristics, refer to the following

general procedures to install the operator.

MOUNT HEADER BRACKET

The trolley operator is generally mounted over the

center of the door. However, off center mounting

may be required due to interfering structures or

location of door stile / top section support. In such

cases, the operator may be mounted up to 24” off

center on torsion spring doors. Extension springs

require center mounting.

1. Locate the center of the door and mark a line on

the wall directly above the door. Extend this line up

the wall.

2. Determine the highest point of door travel.

Slowly raise the door and observe the action of the

top section. When the top section reaches its highest

point, use a level and project a line from this point to

the center line the of the door.

MOUNT OPERATOR

1. Allowing the motor to rest on the floor, raise the

front end of the track assembly to the front header

bracket and fasten using the 3/8”dia. x 6.40” long

pivot shaft and cotterpins supplied.

3. Using the projected lines for location, mount a

suitable wood block or length of angle iron to the wall

above the door opening. Refer to the illustration

below. This will provide a mounting pad for the front

header bracket of the operator. If necessary

reinforce the wall with suitable mounting brackets to

ensure adequate support of mounting pad. Using

suitable hardware, mount the (U shaped) front header

bracket to the pad.

Header Bracket Drill Pattern

2. Swing the operator to a horizontal position above

the guide rails and temporarily secure with a suitable

rope, chain, or support from the floor. Now open

garage door slowly, being careful not to dislodge the

temporary support. Using the door as a support,

place a level against the rail and shim the operator

until it is horizontal. Make sure that the operator is

aligned with the center line of the door.

Door Travel

Projection

INSTALLATION INSTRUCTIONS

Header Attachment

Pivot shaft

Cotterpins

Using the Door as support, shim

operator to a horizontal position.

Guide

Rails

Operator Alignment

OF DOOR

3.50” 1.75”

4” MIN.

High Rise Point

Projection Line

INSTALLATION INSTRUCTIONS

OPERATOR SUPPORT

1. The illustration below shows a typical method of

hanging the operator from the ceiling. Each

installation may vary, but in all cases side braces

should be used for additional strength.

2. For mounting of the support brace(s) to the

powerhead, Four holes (clearance up to 3/8” bolts)

are located on each side of frame.

NOTE: If the operator is longer than 15 feet, use of a

mid-span support is recommended.

STRAIGHT ARM ATTACHMENT

1. Fully close the door and move the trolley slider to

within (2”) two inches of the front idler.

2. Latch the straight door arm to the fixed roll pin in

the trolley carriage. Make sure the open side of

notch on the arm faces the doorway.

3. Attach the door bracket to the door arm using the

3/8”-16 x 1” bolt and nylon locking nut provided.

Leave the nut and bolt loose enough to allow the two

pieces to pivot freely.

4. Using 3/8” hardware provided, bolt the curved

door arm to the straight arm, aligning the mounting

holes in such a way that the door bracket pivot bolt

will be in line with the top rollers on the door.

5. Position the door bracket to the center line on the

door. Using suitable hardware, attach the door

bracket to the door. Many installations, except solid

wood doors, will require additional support for the

door. Refer to the illustration below.

IMPORTANT NOTE: At this time, ensure all bolts

and lag screws are properly secured.

Powerhead Support Brace

Mid-Span

Support Brace

Center Line of Door

Straight Arm

Door Bracket

Curved

Door Arm

Top

Roller

Pivot Bolt

FAILURE TO SUSPEND THE OPERATOR

SECURELY MAY RESULT IN SERIOUS PERSONAL

INJURY OR DEATH, AND/OR PROPERTY DAMAGE.

WARNING

CAUTION

WARNING

TO AVOID SERIOUS PERSONAL INJURY OR DEATH

FROM ELECTROCUTION, DISCONNECT ELECTRIC

WARNING

LIMIT SWITCH ADJUSTMENT

MAKE SURE THE LIMIT NUTS ARE POSITIONED BETWEEN THE LIMIT SWITCH ACTUATORS BEFORE

PROCEEDING WITH ADJUSTMENTS.

If other problems persist, call our toll-free number for

assistance - 1-800-528-2806.

1. To adjust limit nuts depress retaining plate to allow

nut to spin freely. After adjustment, release plate

and ensure it seats fully in slots of both nuts.

2. To increase door travel, spin nut away from actu-

ator. To decrease door travel, spin limit nut

toward actuator.

3. Adjust open limit nut so that door will stop in open

position with the bottom of the door even with top

of door opening.

4. Repeat Steps 1 and 2 for close cycle. Adjust close

limit nut so that actuator is engaged as door fully

seats at the floor.

Retaining Plate

CLOSE Limit Switch

SAFETY

(Aux. Close) Limit Switch

OPEN Limit Switch

Actuator

Aux. OPEN Limit Switch

SENSING EDGES & PHOTO EYES

Sensing devices supplied for door industry type operators

with an isolated normally open (N.O.) output are compati-

ble with your operator. This includes pneumatic and elec-

tric edges, and through beam and retro reflective photo

eyes. If your door does not have a bottom sensing edge or

safety photo eyes and you wish to add a safety device to

your application, please contact your local LiftMaster

Authorized Dealer.

If not pre-installed by the door manufacturer, mount the

sensing edge on the door according to the instructions pro-

vided with the edge. The sensing edge may be electrical-

ly connected by either coiled cord or take-up reel. Refer to

the steps below.

Important Notes:

a) Proceed with Limit Switch Adjustments before making

any sensing edge wiring connections to operator as

described below.

b) Electrician must hardwire the junction box to the oper-

ator electrical box in accordance with local codes.

ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL)

WIRING:

For wiring of your sensing device to the operator,

refer to the wiring diagram supplied with your opera-

tor. See field connection terminals identified as

Sensing Device or Safety Edge.

TAKE-UP REEL: Take-up reel should be installed

12" above the top of the door.

COIL CORD: Connect operator end of coil cord to

junction box (not supplied) fastened to the wall

approximately halfway up the door opening.

IT IS STRONGLYRECOMMENDED THAT A

SAFETY PHOTO EYE OR SENSING EDGE BE

USED IN CONJUNCTION WITH THE OPERATOR.

NOTICE

Remove the cover from the electrical enclosure. Inside this enclosure you will find the wiring diagram(s)

for your unit. Refer to the diagram (glued on the inside of the cover) for all connections described below.

If this diagram is missing, call the number on the back of this manual. DO NOT INSTALL ANY WIRING OR

ATTEMPT TO RUN THIS OPERATOR WITHOUT CONSULTING THE WIRING DIAGRAM.

POWER WIRING CONNECTIONS

ON THREE PHASE MACHINES ONLY!

Incorrect phasing of the power supply will cause the

motor to rotate in the wrong direction (open when

CLOSE button is pressed and vice-versa). To correct

this, interchange any two of the incoming three phase

power lines.

CONDUIT ACCESS

WARNING

Do Not Run Power &

Control Wiring in the

Same Conduit

7/8” Dia Knockouts for

control wiring conduit access

(1 on end panel)

1-1/16’ Dia Knockouts for

power wiring conduit access

(1 on end panel)

WARNING

CAUTION

WARNING

DISCONNECT POWER AT THE FUSE BOX BEFORE

PROCEEDING.

OPERATOR MUST BE PROPERLY GROUNDED AND

PERMANENTLY WIRED IN ACCORDANCE WITH

LOCAL ELECTRICAL CODES. NOTE: THE

OPERATOR SHOULD BE ON A SEPARATE FUSED

LINE OF ADEQUATE CAPACITY.

ALL ELECTRICAL CONNECTIONS MUST BE MADE

BY A QUALIFIED INDIVIDUAL.

WARNING

CAUTION

WARNING

TO AVOID DAMAGE TO DOOR AND OPERATOR,

MAKE ALL DOOR LOCKS INOPERATIVE. SECURE

LOCK(S) IN "OPEN" POSITION.

IF THE DOOR LOCK NEEDS TO REMAIN

FUNCTIONAL, INSTALL AN INTERLOCK SWITCH.

1. Be sure that the power supply is of the correct

voltage, phase, frequency, and amperage to supply

the operator. Refer to the operator nameplate on the

cover.

2. Using the 1-1/16” dia conduit access

knockout as shown below, bring supply lines to the

operator and connect wires to the terminals indicated

on the WIRING CONNECTIONS DIAGRAM.

DO NOT TURN POWER ON UNTIL YOU HAVE

FINISHED MAKING ALL POWER AND CONTROL

WIRING CONNECTIONS AND HAVE COMPLETED

THE LIMIT SWITCH ADJUSTMENT PROCEDURE.

IMPORTANT: THIS UNIT MUST BE PROPERLY

GROUNDED. A GROUND SCREW IS SUPPLIED IN

THE ELECTRICAL BOX FOR CONNECTION OF

THE POWER SUPPLY GROUND WIRE. FAILURE

TO PROPERLY GROUND THIS UNIT COULD

RESULT IN ELECTRIC SHOCK AND SERIOUS

INJURY.

POWER WIRING

CONTROL WIRING

Standard C2 or B2 Wiring

Standard operators are shipped from the factory with

jumper set for C2 wiring, which requires constant

pressure on button to close the door. If momentary

contact on close direction is desired (B2 wiring) you

must include an entrapment protection device. See

close control jumper setting below.

Constant pressure on close (C2 wiring)

Red jumper wire was placed on terminal #2 in

electrical enclosure. The operator will require

constant pressure on close control in order to keep

door moving in the close direction.

Momentary contact on close (B2 wiring)

Move red jumper wire from terminal #2 to terminal

#3. The operator will require only momentary

contact to close the door.

WIRING DIAGRAM

This Operator has

Control Wiring.

SUPPLEMENTAL WIRING DIAGRAM(S)

REPLACEMENT WIRING DIAGRAM

Note: Supplemental Wiring Diagrams are

to be used in addition to 1742-1.

Replacement Wiring Diagram is to be used

in place of 1742-1.

SPECIAL CONTROL

WIRING DATA

LOCATING THE CONTROL STATION

All operators are supplied with some type of control station. Generally a three button station

(OPEN/CLOSE/STOP) is provided. A two-position key switch or control station (OPEN/CLOSE) may be added or

substituted when requested at the time of order. Mount the control station near the door.

WARNING

INSTALL THE CONTROL STATION WHERE THE DOOR

IS VISIBLE, BUT AWAY FROM THE DOOR AND ITS

HARDWARE. IF CONTROL STATION CANNOT BE

INSTALLED WHERE DOOR IS VISIBLE, OR IF ANY

DEVICE OTHER THAN THE CONTROL STATION IS

USED TO ACTIVATE THE DOOR,

A REVERSING EDGE

MUST BE INSTALLED ON THE BOTTOM OF THE DOOR.

FAILURE TO INSTALL AREVERSING EDGE UNDER

THESE CIRCUMSTANCES MAY RESULT IN SERIOUS

INJURYOR DEATH TO PERSONS TRAPPED

BENEATH THE DOOR.

WARNINGW A R N I N G

TO PREVENT ENTRAPMENT

DO NOT START DOOR DOWNWARD

UNLESS DOORWAY IS CLEAR

OPEN

STOP

Standard

Control Station

WARNING Notice

Push

Buttons

IMPORTANT: Mount WARNING NOTICE beside or

below the push button station.

MOUNT WARNING NOTICE

DETERMINE WIRING TYPE

Refer to the wiring diagram located on the inside cover the electrical box to determine the type of control wiring.

Wiring Diagram label on inside cover

of electrical box

Wiring

Type

SPECIAL CONTROL WIRING

If your operator was shipped from the factory with

non-standard control wiring or with optional acces-

sories that require addition instructions, refer to the

wiring diagram(s) indicated in the special control

wiring data box. When a replacement wiring diagram

is present, wiring diagrams in this manual will not

apply. Refer only to the replacement wiring diagram

for all connections.

IMPORTANT NOTE: If your wiring diagram is missing,

or you are unsure of the wiring type for your operator, con-

tact the customer service department @ 1-800-528-2806.

CONTROL WIRING (con’t)

Radio Controls

On all models with type B2 control wiring, a terminal

bracket marked R1 R2 R3 is located on the outside of

the electrical enclosure. All standard radio control

receivers (single channel residential type) may be

mounted to this bracket. The operator will then open

a fully closed door, close a fully open door, and

reverse a closing door from the radio transmitter.

However, for complete door control from a

transmitter, a commercial three-channel radio set

(with connections for OPEN/CLOSE/STOP) is

recommended.

Additional Access Control Equipment

Locate any additional access control equipment as desired (but so that the door will be in clear sight of the

person operating the equipment), and connect to the terminal block in the electrical enclosure as shown on the

FIELD WIRING CONNECTIONS diagram. Any control with a normally (N.O.) isolated output contact may be

connected in parallel with the OPEN button. More than one device may be connected in this manner. Use 16

gauge wire or larger for all controls. DO NOT USE THE CONTROL CIRCUIT TRANSFORMER (24VAC) IN THE

OPERATOR TO POWER ANY ACCESS CONTROL EQUIPMENT OTHER THAN A STANDARD RESIDENTIAL

TYPE RADIO RECEIVER.

External Interlock Switch

The operator has a terminal connection for an external interlock switch. This switch must be a normally closed

(N.C.) two-wire device with a contact rating of at least 3 amps @ 24VAC. When such a switch is connected as

shown on the FIELD WIRING CONNECTIONS diagram, the control circuit will be disabled when the switch is

actuated, thereby preventing electrical operation of the door from the control devices.

WARNING

CAUTION

WARNING

DO NOT USE RADIO CONTROLS WITH YOUR

OPERATOR UNLESS YOU HAVE INSTALLED

SOME TYPE OF ENTRAPMENT PROTECTION

DEVICE. THE USE OF RADIO CONTROLS

PRESENTS POTENTIAL HAZARDS DUE TO THE

USER’S ABILITY TO OPEN OR CLOSE THE

DOOR WHEN OUT OF SIGHT OF THE DOOR. IN

ADDITION, IF A SINGLE CHANNEL CONTROL IS

USED, THE USER WILL NOT BE ABLE TO STOP

THE DOOR FROM THE TRANSMITTER.

CLUTCH ADJUSTMENT

1. Remove cotterpin from nut on the clutch shaft.

2. Back off clutch nut until there is very little tension

on the clutch spring.

3. Tighten clutch nut gradually until there is just

enough tension to permit the operator to move the

door smoothly but to allow the clutch to slip if the door

is obstructed. When the clutch is properly adjusted, it

should generally be possible to stop the door by hand

during travel.

4. Reinstall Cotterpin.

CAUTION: The adjustable friction clutch is NOT

an automatic reversing device. An electric or

pneumatic reversing edge can be added to

bottom edge of door if desired.

Cotterpin

Adjusting Nut

Spring

Clutch Pulley

Clutch Plate

Clutch Pad

Washer

EMERGENCY DISCONNECT SYSTEM

Header

Bracket

Straight

Door Arm

Assembly

Emergency

Release

Handle

Door

Bracket

Door

Chain

Clevis

Trolley

Emergency

Disconnect

Track

Pull emergency

release handle

straight down.

Emergency disconnect

will open.

Emergency

Disconnect

Curved

Door Arm

Lift free end of

door arm to trolley.

Pull emergency handle

to allow arm to engage

roll pin. Release handle.

Emergency disconnect

will close.

Emergency

Disconnect

Door Arm

NOTICE

TO DISCONNECT DOOR FROM OPENER

TO RECONNECT DOOR ARM TO TROLLEY

DOOR ARM IS RELEASED FROM TROLLEY WHEN

EMERGENCY DISCONNECT OPENS.

TO AVOID BEING STRUCK BY DOOR ARM, DO NOT

STAND UNDER THE ROPE OR DOOR ARM WHEN

PULLING THE EMERGENCY RELEASE.

WARNING

CAUTION

WARNING

TEST THE SYSTEM

Turn on power. Test all controls and safety devices

to make sure they are working properly. It will be

necessary to refer back to page 6 for fine adjustment

of the limit switches.

IMPORTANT NOTES:

Do not leave operator power on unless all safety

and entrapment protection devices have been

tested and are working properly.

Be sure you have read and understand all Safety

Instructions included in this manual.

Be sure the owner or person(s) responsible for

operation of the door have read and understand

the Safety Instructions, know how to electrically

operate the door in a safe manner, and know how

to use the manual disconnect operation of the

door operating system.

WARNING

CAUTION

WARNING

DO NOT PLACE HANDS OR TOOLS IN OR

NEAR THE OPERATOR WHEN THE POWER IS

ON OR WHEN TESTING CONTROL OR SAFETY

DEVICES. ALWAYS DISCONNECT POWER

BEFORE SERVICING OR ADJUSTING THE

OPERATOR.

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