Envirco MAC 10 IQ - Manual (Page 17)

MAC 10
®
IQ
Fan Filter Unit
17 Innovators in Clean Air Technology | www.envirco.com | Operation & Maintenance
I n s t a l l a t i o n & S e r v i c e M a n u a l
■ Service: Standard and RSR Motor Removal and Installation
Tools Required: Phillips Head Driver, Battery Operated Drill, (2) 8” adjustable wrenches, 10 mm hex head wrench,
#2 screwdriver, and slip joint pliers
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. Loosen the electrical box cover screws (2), and slide/lift off cover.
Step 4. Make note of all wire routing and locations for later reinstallation.
Step 5. Disconnect 5-pin and 16-pin wire harnesses from the electrical box housing and remove the tubing for test port, if
installed.
Step 6. Remove the eight mounting screws to free 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. Carefully remove housing assembly, paying
attention to wire routing.
Step 7. Using an adjustable wrench loosen the two set screws that attach the blower wheel to the motor shaft.
Step 8. Mark the location of the motor support bracket (belly band), then loosen the bolt just enough to allow the motor
support bracket to slid off the motor.
Step 9. Using the removed motor, mark the new motor with the location of the motor support bracket.
Step 10. Replace with the new motor and reassemble by reversing the above steps 1-8. Set the spacing at 0.25” (6.35 mm)
clearance between the blower and the upper motor plate/prefilter frame. This will give a 0.11” overlap between the venturi
ring and the blower.
WARNING
DISCONNECT THE UNIT FROM THE ELECTRICAL
POWER SOURCE BEFORE ATTEMPTING
ANY SERVICE
WARNING
ELECTRICAL SERVICE SHOULD ONLY
BE PERFORMED BY A LICENSED
OR QUALIFIED ELECTRICIAN.
Motor/Electrical Removal
MAC 10 IQ VE5 SERVICE MANUAL
PAGE 13
Figure 6 – Motor Replacement
Blower Wheel
Venturi Ring
Motor
Prefilter
ON/OFF Switch
Power Entrance