LiftMaster MGJ LGJ Manual - Page 11

CONTROL WIRING DETERMINE WIRING TYPE Refer to the wiring diagram located on the inside cover the electrical box to determine the type of control wiring. MODEL MGJ Standard C2 or B2 Wiring Model MGJ 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 in 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 the 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. SPECIAL CONTROL WIRING If your operator was shipped from the factory with non-standard control wiring or with optional accessories that require additional 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, contact the customer service department @ 1-800-528-2806. MODEL LGJ Standard G2 Wiring Model LGJ operators are supplied with type G2 control wiring. Study the control features list below to determine the features and type of control equipment that may be used with your operator. Entry Controls: OPEN control requiring maintained contact. OPEN control requiring only momentary contact. CLOSE control requiring maintained contact. CLOSE control requiring only momentary contact. OPEN/CLOSE single control requiring momentary contact.. STOP control requiring momentary contact. Safety Devices: External Interlock switch to disable all control pneumatic safety (N.C.) to STOP while closing Safety Device to REVERSE while closing Door Lock Sensing Circuit. Operational Features: REVERSE (if closing) with momentary contact on OPEN. AUTOMATIC TIMER to CLOSE from any device. AUTOMATIC TIMER to CLOSE from selected devices. DELAY REVERSE in either direction for 1 second. STOP after maximum run time is exceeded. Note: Refer to LGJ control connection diagrams on page 15. 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 CAUTION THE DOOR. FAILURE TO INSTALL A REVERSING EDGE UNDER THESE CIRCUMSTANCES MAY RESULT IN SERIOUS INJURY OR DEATH TO PERSONS TRAPPED BENEATH THE DOOR. WARMONUINNTGWARNING NOTICE IMPORTANT: Mount WARNING NOTICE beside or below the push button station. Control Station Push Buttons OPEN WARNING WARNING CLOSE TO PREVENT ENTRAPMENT DO NOT START DOOR DOWNWARD UNLESS DOORWAY IS CLEAR STOP WARNING Notice 11