Grifco Fire Shutter - Limit Switch Connections; Setup and Adjustment; Limit Setup

11
Limit Switch Connecon
The limit switches are connected to the control gear being used via the NORMALLY CLOSED (N/C) and COMMON (COM) of the
microswitch:
Limit seng procedure
 ISOLATE MAINS BEFORE SETTING LIMITS
 AVOID CRAMMING WIRES INTO LIMIT ENCLOSURE AS IT MAY AFFECT CAM MOVEMENT
Follow the steps below:
1. Manually posion the door in the centre of the opening.
2. Posion one cam to depress a switch and the other so that it is well clear of the switch (note which switch it is that you have
depressed).
For controls with up and down funcons:
 Supply power and acvate control in the upward direcon.
 If the door travels up, then the limit switch which is engaged by the cam is the CLOSED limit.
 If the door doesn't move it is at the OPEN limit.
 Connue to Step 3 below
For single buon controls:
 Supply power and push the buon.
 If the door travels up, then the limit switch which is engaged by the cam is the CLOSED limit.
 If the door travels down, then the limit switch which is engaged by the cam is the OPEN limit.
 Connue to Step 3 below
3. Isolate power and adjust the limit cams to depress the switches when the shuer reaches its OPEN and CLOSED posions.
4. Supply power and cycles the door between the OPEN and CLOSED posions. Adjust cam posion if necessary.
WARNING
Limits are extremely sensive, a small cam movement may correspond to a large amount of shuer travel.
Limit micro switches
Limit cams
INSTALLATION
SETUP AND ADJUSTMENT
Limit Cam System
Limit Microswitch Terminals