Greenheck Fan 41, 81 specifications Equipment Damage Hazard Can damage the motor beyond repair

SERIES 41 AND 81 MODUTROL IV™ MOTORS

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

	Auxiliary Switch Contact Positions (Viewed from the Power End)
	N.O. Contact		N.C. Contact
Switch	Shaft Rotated ccw of	Shaft Rotated cw of	Shaft Rotated ccw of	Shaft Rotated cw of
Differential	Switch Point	Switch Point	Switch Point	Switch Point
1°	Open	Closed	Closed	Open
10°	Closed	Open	Open	Closed

9 63-2187—3