15
FIGURE I
Torque Arm (No. 2082 Curtains Only)
The torque arm drive must be installed and positioned as described in step # 8. Before proceeding with the test, verify that the torque arm
drive is properly positioned (i.e. torque arm is in horizontal position, approximately ninety degrees to floor surface). After verifying the
torque arm drive position, the assembly is ready to be operated. First, operate the curtain in the “up” direction while observing the rotation
direction of the torque arm belt. The torque arm belt must be wrapping in the direction shown for the curtain “up” direction of travel. See
Figure J. If the rotation is not correct, reverse the “up” and “down” wires at the key switch terminals. The curtain is now ready for limit
switch setting. Refer to the limit switch setting section.
FIGURE J
16. LIMIT SWITCH SETTING
The torque motor limits are quickly and easily set by simply depressing and releasing the torque motor limit switches, but first it will be
necessary to determine which limit switch stops a direction of operation. This is accomplished by performing the following test. Remove
the limit switch protective cover. Depress one switch and release it (switch is now up). Turn the key switch key in one direction. If the
curtain does not operate, the switch released controls that direction of travel. On the other hand if the curtain operates, the other limit
switch controls that direction of travel. Reset the limit previously released by pushing it down (switch is now down). Now, the limits are
ready to be set. To set the “up” limit, carefully raise the curtain to the desired up position or before the curtain comes in contact with the
overhead structure or hardware, then simply depress the switch (switch is now up) that controls the “up” direction of travel. To set the
“down” limit, lower the curtain until the curtain is completely down (batten tube slots are vertical), then depress the switch (switch is now
up) that controls the “down” direction of travel. The limits are now set. Reinstall the limit switch protective cover.
BELT ROUTES ABOVE
FIRST SPACER
S
O
M
F
Y
BELT ROUTES BETWEEN
THE TWO SPACERS
BELT WRAPS FROM
TOP OF HUB WITH
2 TO 3 DEAD WRAPS
BELT ROUTES UNDER
PRIMARY ROLLER AND
UP (BETWEEN PRIMARY
& SECONDARY ROLLERS)
BELT TO ROUTE DIRECTLY
UP TO TIE-OFF POINT
BELT DIRECTION
(CURTAIN UP)
Summary of Contents for Center-Roll 2081
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