LiftMaster LGJ User Manual

OWNER'S MANUAL

MODELS:

LGJ & MGJ

INDUSTRIAL DUTY DOOR OPERATOR

NOT FOR RESIDENTIAL USE

LISTED DOOR OPERATOR

41B6

Serial #

(located on electrical box cover)

Installation Date

Wiring Type

2 YEAR WARRANTY

SPECIFICATIONS

MOTOR

TYPE: .................................Intermittent Duty

HORSEPOWER: ................MGJ: 1/2Hp 1 or 3 Phase

LGJ: 1/4 Hp 1 Phase

SPEED:...............................MGJ: 1050 RPM

LGJ: 1725 RPM

VOLTAGE:..........................MGJ: 115, 60HZ, 1Ph

230V, 50 or 60Hz, 3Ph

230V, 60Hz, 1Ph

380V, 50Hz, 3Ph

460V, 60Hz, 3Ph

LGJ: 115V, 60Hz, 1Ph

CURRENT: See motor nameplate

MECHANICAL

DRIVE REDUCTION: ... . . . . . . . . . . . . 40:1 Reduction

(Heavy duty wormgear-in-oil-bath speed reducer)

OUTPUT SPROCKET:...........Size #41

DOOR SPEED: . . . . . . . . . . MGJ: 1Ph, 23RPM

3Ph, 39RPM

LGJ: .1Ph, 43RPM

BEARINGS: .................Heavy duty wormgear-in-oil-bath

speed reducer.

ELECTRICAL

RANSFORMER:.............24VAC

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

WIRING TYPE: MGJ: B2-C2 (Factory Shipped)

See pages 13 and 14 for optional control settings and operating modes.

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

screw type cams. Adjustable to 24 feet.

OPEN/CLOSE/STOP

LGJ: G2 (Factory Shipped)

SAFETY

DISCONNECT :.......................Floor level disconnect 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.

MGJ WEIGHTS AND DIMENSIONS

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

7.50”

11.05”

7.00”

9.25”

LGJ WEIGHTS AND DIMENSIONS

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

7.90”

10.50”

11.00”

3.00”

MOUNTING DIMENSIONS

5.50”

4.75”

.98”

1.96”

4.50”

2.25”

8.90”

1.97”

MOUNTING DIMENSIONS

10.88”

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.

DO NOT CONNECT ELECTRIC POWER UNTIL INSTRUCTED TO DO SO.

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. CALL A PROFESSIONAL DOOR SERVICEMAN TO MOVE OR ADJUST DOOR SPRINGS OR HARDWARE.

WARNING

CAUTION

WARNING

SITE PREPARATIONS

It is imperative that the wall or mounting surface provide adequate support for the operator. This surface must:

a) Be rigid to prevent play between operator and door shaft. b) Provide a level base. c) Permit the operator to be fastened securely and with the drive shaft parallel to the door shaft.

The safety and wear of the operator will be adversely affected if any of the above requirements are not met.

For metal buildings, fasten 2” x 2” x 3/16” (or larger) angle iron frames to the building purlins. For proper spacing, retain .2.75” between for model MGJ, butt purlins together for model LGJ. See Figure 1.

OPERATOR PREPARATION

IMPORTANT SAFETY NOTES

2.75 for MGJ, butt together for LGJ

Model LGJ: Shipped from the factory for right hand mounting, refer to preparation instructions on page 4 for

Left hand mounting.

Model MGJ: Shipped from the factory for either left hand or right hand mounting. Refer to the last digit in the

model number for handing of your unit. If necessary, model MGJ may also be field modified to accommodate opposite handing. Refer to the conversion instructions below and on page 4.

KEYS

SPRING

DISC

HUB

E RING

SPROCKET

YOKE

BRACKET

SHAFT

DISC

LEVER

MGJ OPPOSITE HANDING PREPARATIONS

1. Remove Disconnect Assembly Components

Remove the master link from the limit chain, remove the chain and set it aside.

Remove the two E Rings securing the sprocket on the gear reducer shaft. Remove the screws securing the yoke to the disconnect shaft, set the yoke aside.

CAUTION

WARNING

Shaft Support Bracket with Bearing (Not Supplied)

Door Sprocket

2-1/4"

FIGURE 1

Remove the three cotter pins from the disconnect shaft. Do not discard the pins. Slide the disconnect shaft out of the support bracket. The release lever will now be free inside the motor frame. Remove the release lever and sash chain from the motor frame. Slide the disconnect hub, compression spring, and flatwasher

2. Re-assemble Disconnect Assembly

Remove the two screws on the opposite side of the gear reducer and mount the disconnect support bracket with the notched side facing the motor. For the remainder of the installation, follow the steps outlined above in

reverse order, referring to the illustration as necessary. from the end of the gear reducer shaft. Remove the disconnect support bracket by first removing the the two gear reducer housing screws. Replace the screws in the gear reducer and firmly tighten.

LGJ LEFT HAND MOUNTING PREPARATIONS

LGJ Operators are assembled at the factory to be installed in a right hand (motor side up) configuration. To install an LGJ Operator on the left hand side of your door (motor side down), complete the three steps described below.

1. Reconfigure Disconnect Chain Assembly

The default configuration for the disconnect chain assembly is shown in Figure 1. This configuration allows the chain to hang freely when the operator is mounted on right side only. To insure smooth operation of the disconnect chain assembly when mounted motor side down, reconfigure as

described below and as shown in figures 2 and 3.

1. Disconnect the key ring from the release cable.

2. Thread the release cable through the slot on the outermost edge of the support bracket, as shown in Figure

3. Re-attach the key ring and sash chain to the end of the loop of release cable.

FIGURE 1

HOUR GLASS CABLE SLEEVE

2. Set Limit Switch Direction

Locate Switch #1 on PCB in the electrical box. Place pole #2 of Switch #1 in the “OFF” position. With this setting limit switch labeled “A” is the close switch, limit switch labeled “B” is the open switch.

IMPORTANT: Refer to page 9 for for complete instructions on setting of limit switches.

3. Affix Electrical Box Cover Caution Label

Place the caution label on electrical box cover such that the text is read in the opposite direction of silkscreen.

SLOT

RELEASE CABLE

SUPPORT BRACKET

KEY RING

SASH CHAIN

Disconnect Cable as shipped from the factory

FIGURE 3

LABEL

SILK

SCREEN

HOUR GLASS CABLE SLEEVE

RELEASE CABLE

SUPPORT BRACKET

SLOT

SASH CHAIN

KEY RING

FIGURE 2

Disconnect Cable Re-routed for Left Hand Mounting

OPERATOR MOUNTING

Before your operator is installed, be sure the door has been properly aligned and is working smoothly. The operator may be wall mounted or mounted on a bracket or shelf. If necessary, refer to the operator preparations on page 3. Refer to the illustration and instructions below that suits your application.

1a. Wall Mounting

The operator should generally be installed below the door shaft, and as close to the door as possible. The optimum distance between the door shaft and operator drive shaft is between 12” - 15”. Refer to Figure 3.

1b. Bracket or Shelf Mounting

The operator may be mounted either above or below the door shaft. The optimum distance between the door shaft and operator drive shaft is between 12” - 15”. Refer to Figure 4.

OPTIONAL (LGJ) Mounting Bracket

OPTIONAL (MGJ) Mounting Bracket P/N 10-9098

Typical Right Hand Wall Mounted Operator

1c. Place door sprocket on the door shaft. Do not

insert the key at this time.

2. Wrap drive chain around door sprocket and join roller chain ends together with master link.

3. Raise operator to approximate mounting position and position chain over operator sprocket.

4. Raise or lower operator until the chain is slightly taut (not tight). Make sure the operator output shaft is parallel to door shaft and sprockets are aligned. When in position, secure the operator to wall or mounting bracket.

5. Align sprockets and secure, (see Figure 5).

IMPORTANT: The shelf or bracket must provide adequate support, prevent play between operator and door shaft, and permit operator to be fastened securely and with the drive shaft parallel to the door shaft.

FIGURE 4FIGURE 3

Be sure door sprocket is properly aligned with drive before securing to the shaft.

Chain Keeper

FIGURE 5

EMERGENCY MANUAL OPERATION

This operator a floor level disconnect chain to disconnect the door from the door operator allowing for manual operation of the door in case of emergency or power failure.

1. To disengage, pull the chain and secure in the disengaged position by slipping the end through the keyhole bracket mounted on the wall. Or if emergency egress device is used, pull handle to disengage operator from door.

2. The door may now be pushed up or pulled down manually. Release the disconnect chain to operate the door again electrically.

Keyhole Bracket

6. Mount Chain Keeper / Keyhole Bracket Using suitable hardware mount the chain keeper approximately 4 feet above the floor, near the free hanging chain. Remove disconnect sash chain from bag and place the end through the keyhole in the the chain keeper. Remove excess links if necessary.

TURN OFF POWER TO THE OPERATOR BEFORE MANUALLY OPERATING YOUR DOOR.

WARNING

CAUTION

WARNING

Pull sash chain and secure in bracket for manual operation of the door.

CAUTION

WARNING

ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL)

SENSING EDGES

All types of sensing edges with an isolated normally open (N.O.) output are compatible with your operator. This includes pneumatic and electric edges. If your door does not have a bottom sensing edge and you wish to purchase one, contact the supplier of your operator.

If not pre-installed by the door manufacturer, mount the sensing edge on the door according to the instructions provided with the edge. The sensing edge may be electrically 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

operator electrical box in accordance with local codes.

MGJ LIMIT SWITCH ADJUSTMENT

IT IS STRONGLY RECOMMENDED THAT A SENSING EDGE OR OTHER ENTRAPMENT PROTECTION DEVICE BE USED IN CONJUNCTION WITH THIS OPERATOR.

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.

MAKE SURE THE LIMIT NUTS ARE POSITIONED BETWEEN THE LIMIT SWITCH ACTUATORS BEFORE PROCEEDING WITH ADJUSTMENTS.

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 actuator. 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.

CLOSE Limit Switch

TO AVOID SERIOUS PERSONAL INJURY OR DEATH FROM ELECTROCUTION, DISCONNECT ELECTRIC POWER BEFORE MANUALLY MOVING LIMIT NUTS.

If other problems persist, call our toll-free number for assistance - 1-800-528-2806.

WARNING

OPEN Limit Switch

Actuator

SAFETY

(Aux. Close) Limit Switch

Retaining Plate

Aux. OPEN Limit Switch

+ 16 hidden pages