Chamberlain MGJ Owner's Manual

MODELS MGH & MGJ MEDIUM DUTY DOOR OPERATOR NOT FOR RESIDENTIAL USE 41B6 Serial # (located on electrical box cover) Installation Date Wiring Type www.liftmaster.com 2 YE A R WA R R A N T Y ...

CARTON INVENTORY Carton Inventory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Operator Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Operator Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 PREPARATION MGJ Opposite Handing Preparat ...

HANGING WEIGHT: 70-80 LBS. WEIGHTS AND DIMENSIONS - MGJ HANGING WEIGHT: 50-60 LBS. C A R T O N I N V E N T O R Y Before beginning your installation check that all components were provided. DESCRIPTION POWERHEAD ASSEMBLY OWNER’S MANUAL AND CAUTION LABELS HARDWARE BOX 3-BUTTON CONTROL STATION HOIST HAND CHAIN (MGH Model o ...

HORSEPOWER: . . . . . . . . . . . MGJ: 1/2 HP 1 or 3 Phase MGJ: 3/4 HP 1 Phase (only) MGH: 1/2 & 3/4Hp 1 Phase VOLTAGE:. . . . . . . . . . . . . . . . MGJ: 120V, 60Hz, 1Ph 230V, 50 or 60Hz, 3Ph 230V, 60Hz, 1Ph 380V, 50Hz, 3Ph 460V, 60Hz, 3Ph MGH: 120V, 60Hz, 1Ph CURRENT: See motor nameplate The ...

mounting. Refer to the last digit in the model number for handing of your unit. If necessary, the operators may also be field modified to accommodate opposite handing. MGJ OPPOSITE HANDING PREPARATIONS REMOVE DISCONNECT ASSEMBLY COMPONENTS Remove the master link from the limit chain, remove the chai ...

1. Remove snap ring from end of shaft on the hoist side. 2. Remove the washers, chain guide and chain wheel. 3. Remove drive pin from shaft and relocate to the opposite side. 4. Install chain wheel, chain guide, washers and snap ring. MGH LEFT HAND MOUNTING PREPARATIONS The operator may be mounted on either the right (sta ...

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 preparation on page 5. Refer to the illustration and instructions below that suits your application. OPTIONAL Mounting Bracket P/ ...

allow for manual operation of the door in case of emergency or power failure. MODEL MGJ 1. To disengage, pull the sash 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 h ...

NOTE: Make sure the limit nuts are positioned between the limit switches before proceeding with adjustments. 1. Depress retaining plate to allow nut to spin freely. After adjustment, release plate and move nut back and forth to ensure it is fully seated in slot. 2. To increase door travel, spin nut away from limit switch. To decreas ...

To reduce the risk of SEVERE INJURY or DEATH: • ANY maintenance to the operator or in the area near the operator MUST NOT be performed until disconnecting the electrical power and locking-out the power via the operator power switch. Upon completion of maintenance the area MUST be cleared and secured, at ...