Greenheck Fan Modutrol IV Motors 81 - Manual (Page 9)

SERIES 41 AND 81 MODUTROL IV™ MOTORS
9 63-2187—3
CAUTION
Equipment Damage Hazard.
Can damage the motor beyond repair.
Never turn the motor shaft by hand or with a wrench.
Forcibly turning the motor shaft damages the gear
train and stroke limit contacts.
NOTES:
— Auxiliary switches can only be added to motors
that include auxiliary switch cams. (These cams
cannot be field-added.)
— Normally Closed motors are shipped in the closed
position (counterclockwise, viewed from the
power end) with auxiliary switch cams set to
operate switches 30° from closed position with a
1° differential. With motor in fully closed position,
the N.C. auxiliary switch contacts are closed.
— Normally Open motors are shipped in the open
position (clockwise, viewed from the power end).
— See Fig. 12 (or the auxiliary switch Instruction
Sheet) for auxiliary switch wiring.
— TRADELINE motors are shipped with auxiliary
switch cams that permit acceptance of 220736A,B
Internal Auxiliary Switch Kits. Refer to form 63-
2228 for kit installation instructions.
To rotate a cam, insert a small screwdriver (1/8 in. or 3 mm
blade) through the wiring box into the slot on the cam and
move the screwdriver at the top of the handle. The inner cam
actuates the right switch and the outer cam actuates the left
switch (viewed from the power end). Refer to Fig. 11. Each
division on the cam represents 15° of motor rotation.
1. Turn off the power and remove the wiring box cover.
2. Determine the amount of shaft rotation, in degrees,
desired before the switch is to be energized.
3. Note the cam slot positions.
4. With a screwdriver, rotate the cam to the desired angle
for switching action. As noted above, each cam division
represents 15° of motor rotation. Therefore, if 60° of
motor rotation is desired before the switch operates,
rotate the cam four divisions from the reference point.
5. Turn on the power.
6. Check for proper switch differential and switching of
auxiliary equipment by driving the motor though full
stroke (in both directions). If necessary, repeat steps 3
and 4 until correct switching action is obtained, turning
off the power before readjusting the cam.
7. When adjustments are complete, replace the wiring box
cover.
Table 5. Auxiliary Switch Position with Motor Shaft Rotated to Either Side of Auxiliary Switch Operating Point
Switch
Differential
Auxiliary Switch Contact Positions (Viewed from the Power End)
N.O. Contact N.C. Contact
Shaft Rotated ccw of
Switch Point
Shaft Rotated cw of
Switch Point
Shaft Rotated ccw of
Switch Point
Shaft Rotated cw of
Switch Point
1° Open Closed Closed Open
10° Closed Open Open Closed