Lift-master LIMIT SWITCH User Manual

Limit Switch Assembly

APPLICATION REQUIREMENTS:

Replacement of Limit Switch and/or its components for a Model FDC Operator.

INSTALLATION INSTRUCTIONS

NOTE: Refer to the Owner’s Manual supplied with the operator for all mounting and wiring instructions.

REMOVE EXISTING LIMIT SWITCH ASSEMBLY:

Disconnect the wire connections to the limit switches. Remove the six screws from the nut plates. Remove the limit switches, back-up plates and standoffs from the electrical box and discard.

Remove the two 1” screws from the locknuts. Remove the depress plate and depress plate springs and discard.

INSTALLING NEW LIMIT ASSEMBLY:

To install the new limit assembly, follow the steps outlined above in the reverse order. Reconnect the wires to the new limit switches, referring to the owners manual and illustration below.

NOTE: Other components not

shown in box for easier viewing.

DISCONNECT POWER AT THE FUSE BOX BEFORE PROCEEDING. IF NECESSARY REMOVE THE OPERATOR FROM ITS MOUNTED POSITION.

OPERATOR MUST BE PROPERLY GROUNDED AND CONNECTED 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.

WIRE CONNECTIONS

OPEN

LIMIT

NC NO

(WH)

Replacement Kit for

FDC-Line Operators

WARNING

(BL)

(YE)

(WH)

(RD)

NC NO

SAFETY

LIMIT

J3 CONNECTOR