The counterbalance system is an option for opening the door in
the case of a power outage.
1.
Operate door to the full open position and turn off power.
Make sure the power source has been locked and tagged
out according to OSHA regulations and approved local
codes. Barricade door to prevent vehicle traffic entry.
2.
Mount the counterbalance channel at 2 3/4” from the non-
drive sideframe,
Figure 37.
The centerline of the channel
should be in line with the centerline of the pulley on the
end of the roller tube shaft.
3.
Check that the number of pre-wraps of the counter weight
belt is 1 1/2 turns. The belt should be routed off the front
of the counterbalance pulley. Route the belt behind the
idle pulley and drop to the floor.
4.
Position the counterweight on a block in front of the
counterbalance channel and remove the clevis pin from
the top of the counterweight. Route the belt through the
buckle as shown to create a loop and locate as close to
the weight as possible. Connect the strap to the
counterweight using the clevis pin and clip.
5.
Reconnect the power to the door and run to the closed
position. Watch so the counterweight buckle does not
contact the idle pulley, if it appears that it will, stop the
door immediately and adjust the buckle downward. With
the door in the full closed position, mark the idle pulley
position on the belt and adjust the buckle to rest as close
as possible to the idle pulley, weight may hit floor before
fully opening on certain size doors.
6.
Adjust limit switches as required and cycle door 10 times
to verify operation.
7.
With door in closed position and power off, slide the pvc
pipe over the counterweight and push it back into the
channel. Cable tie pipe into position through the rings in
the channel.
8.
Install the guard onto the channel using the 5/16”x3/4”
fasteners provided. DO NOT install top bolt at this time.
9.
Install the non-drive shroud.
10.
Pull brake release handle to check for proper operation, it
may be necessary to assist curtain.
FIGURE 38
Buckle
Counterweight
Channel
Clevis
Pin
Clip
Cable Ties
PVC Pipe
Counterweight
Channel
Be careful when running the door prior to
counterweight installation as the belting may
become entangled.
Be prepared to stop the door before
counterweight contacts the idle pulley or floor.
CAUTION !!!
!
2 3/4”
Wall
Counterbalance
Channel
Non-Drive Sideframe
1 1/2 Turns of the
Counterweight Belt
Idle Pulley
Counterbalance
Pulley
FIGURE 37
RH DRIVE SHOWN, LH OPPOSITE
26
Pub. No. 8000CLB FEBRUARY 2004
PROTECDOR® CL Model 8000CL
OPTIONAL COUNTERBALANCE SYSTEM
