Envirco MAC 10 Original - Manual (Page 13)

MAC 10 ORIGINAL VE5 SERVICE MANUAL
PAGE 12
6 SERVICE: Removal and Installation of the Motor (Standard
and RSR models)
WARNING!
Disconnect the unit from the electrical power source before attempting any
service.
WARNING!
Electrical service should be performed by licensed electricians or authorized
ENVIRCO service technicians.
Tools Required: Phillips Head Driver
3/8” (10mm) Hex Head Wrench
Pliers
5/32”(0.40 cm) Allen wrench
Step 1. To gain access to the motor, remove the ceiling panel next to the unit, if
applicable.
Step 2. Switch the ON-OFF switch to the off position.
Step 3. Remove the prefilter off the prefilter frame. (See Section II)
Step 4. Loosen the electrical box cover screws (2), and slide/lift off cover. (Figure 5)
Step 5. Make note of all wire locations for reinstallation later.
Step 6. Disconnect the two brown wires from the capacitor, using a pair of pliers.
Step 7. Disconnect the motor wiring from the rotary switch and rocker switch or speed
control and rocker switch and remove the grommet from the motor leads. Save
this grommet for reinstallation.
Step 8. Remove the six screws to free the venturi ring and remove the motor/blower
assembly from the lid assembly. If using power drivers, set the unit to a low
torque setting to avoid stripping the sheet metal screws. (See Figure 6)
Step 9. Using a 5/32”(0.40 cm) Allen wrench remove the blower wheel from the motor
shaft. Remove motor from the venturi ring using a hex wrench.
Step 10. Replace with the new motor and reassemble by reversing the above steps. Set
the spacing between the venturi ring and the blower wheel at 0.06”(0.15 cm)
clearance.