Maintenance
GMND-SVX01B-EN
33
Installation Instructions for Field
Replacement of Power Venter Motor
Important:
This replacement must be performed only
by a qualified technician.
Note:
All hardware (screws, nuts, washers) that will be
removed from the unit will be reused for this motor
replacement. DO NOT LOSE ANY OF THESE
PARTS.
Tools and Parts Needed
Wire Stripper and Crimper; Slotted Head and #2 Phillips
Head Screwdriver; 3/8-in. Wrench; 1/8-in. Allen Wrench
(long handle); marker; (1) 1/4-in. push on terminal for Wire.
Notes:
•
Remove the cover from the Relay Junction Box (Item 1)
by removing two screws (Item 2) top and bottom.
Disconnect both wires from the motor lead ends. One
is connected to terminal #4 on the venter relay, and the
other is connected with a wire nut to a black wire.
•
Remove the sensing tube (Item 3) from the Pressure
Switch/Mounting Bracket (Item 3) at motor end only.
Separated Combustion Units: Remove both tubes at
motor end only—note location.
•
Mark locations of the Relay Junction Box and Pressure
Switch Mounting Brackets along with the Motor (Item
10) mounts on the Mounting Adapter Plate (Item 4)—
using a marker.
•
Remove nut (Item 5) that secures the Motor Support
Shipping Bracket (Item 6) to the Mounting Adapter
Plate. Pull this bracket away from the Motor Mounting
Adapter Plate.
•
Remove three phillips head screws (Item 7) on the
Motor mounting Adapter Plate. Remove the Motor/
Blower Wheel/Adapter Plate assembly from the Power
Venter Blower Housing (Item 8).
•
Remove the Blower Wheel (Item 9) from the motor
shaft by removing the set screw (Item 14) using a 1/8-in.
Allen Wrench.
•
Remove the three Motor Mounting Nuts (Item 5),
Space Washers (Item 11), and Screws (Item 12). Do not
lose these parts! Using caution—the motor will
disengage from the Mounting Adapter Plate, along
with the Relay Junction Box and Pressure Switch
Mounting Brackets will also disengage.
•
Reverse order to install the new Power Venter Motor.
•
TEST FIRE THE UNIT FOR A FEW CYCLES, MAKING
SURE THAT THE UNIT IS OPERATING
SATISFACTORILY.
Figure 21. Identification of parts
Ref. No.
Description
1
Relay Junction Box/Mounting
Bracket Assembly
2
#8 Drill Screws (2 required)
3
Pressure/Mounting Bracket
Assembly
4
Mounting Plate Adapter
5
Keps Nut w/External Tooth
Lockwasher (4 required)
6
Motor Support Shipping Bracket
7
Phillips Head Screws (3 required)
8
Power Venter Blower Housing
9
Blower Wheel
10
Motor
11
Space Washers (3 required)
12
Machine Screw (3 required)
13
Sensing Tube
14
Set Screw
