Sterling QVEF User Manual
Page 24
1 - Identification
of Parts
24
NOTES:
1) 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.
2) Remove the sensing tube (Item 13) from the Pressure
Switch/Mounting Bracket (Item 3) at motor end only.
Separated Combustion Units: Remove both tubes at motor
end only - note location.
3) 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.
4) 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.
5) 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).
6) Remove the Blower Wheel (Item 9) from the motor shaft - by
removing the set screw (Item 14) using a 1/8" Allen Wrench.
7) Remove the three Motor Mounting Nuts (Item 5), Space
Washers (Item 11), and Screws (Item 12). Do not loose 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.
8) Reverse Order to install the new Power Venter Motor.
9) TEST FIRE THE UNIT FOR A FEW CYCLES, MAKING SURE
THAT THE UNIT IS OPERATING SATISFACTORY.
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
TOOLS AND PARTS NEEDED:
Wire Stripper and Crimper; Slotted Head and #2
Phillips Head Screwdriver; 3/8" Wrench; 1/8" Allen
Wrench (long handle); marker; (1) 1/4" push on
terminal for Wire
INSTALLATION INSTRUCTIONS FOR FIELD
REPLACEMENT OF POWER VENTER MOTOR
Never service any component
without first disconnecting all electrical and
gas supplies. Refer to unit’s wiring diagram.
This replacement must be performed only by a
qualifi ed technician.
NOTICE: 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!
Figure 18 - Identifi cation of Parts