Beckett CG4 - Manual (Page 25)

25 CG4 Burner Manual
Section: MAINTENANCE AND SERVICE
Figure 16 – Blower wheel assembly
Use a Feeler Gauge to set
the gap to 0.030 ±1/64 inch
Replace the Blower Wheel
1. Turn off all power to the burner before servicing.
2. Disconnect the burner motor wires.
3. Remove the bolts securing the motor to the
burner housing.
4. Remove the motor and blower wheel.
5. Remove the existing blower wheel.
6. Referring to the illustration to the left, slide the
new blower wheel onto the shaft.
○ Use a feeler gauge to set the wheel-to-motor
gap, 0.030 ±1/64 inch.
○ Slide blower wheel toward motor until it
contacts feeler gauge.
○ Rotate the blower wheel until the setscrew is
centered on the flat of the motor shaft. Tighten
the set screw 45 to 80 in.-lbs. to secure the
wheel.
7. DO NOT use a motor that has endshield
openings outside the blower wheel circumference
(represented by the dashed line).
8. Install the motor on the burner housing. Tighten
screws. Reconnect wires.
9. Restore power, start the burner and perform
combustion tests. Refer to the section
“Recommended Combustion Adjustment
Procedure” on page 22.
Figure 17 – Gas Gun Assembly
Electrode
Gas Nozzle
Align electrode point
with nozzle point.
Ignition Electrode Adjustment Flame Rod Position
1/8”±1/32”
1-5/8” +1/16”
-0”
Delayed Ignition,
Explosion, and/or
Fire Hazard
DO NOT loosen or remove these screws.
They secure important factory settings.