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Figure 7.2
Grounding Terminal Location
7. Using a 7/16" socket or open end wrench
remove the four 1/4"-20 nuts on the gas inlet
pipe flange at the burner (See Fig. 7.3).
8. Using two 9/16" wrenches remove the 3/8"-
16 hex nuts and bolts on the gas inlet pipe
flange at the air/fuel valve (See Fig. 7.3).
9. Loosen the hose clamp nearest the air/fuel
valve outlet on the air/fuel valve to burner
adapter (See Fig. 7.3).
10. Using a 1/2" socket wrench remove six 5/16-
18 hex nuts supporting the burner (See Fig.
7.3).
Figure 7.3
Burner Disassembly Diagram
11. Lower the burner while sliding the air hose
off the air/fuel valve. Remove the burner
through the rear of the unit.
12. Disconnect the exhaust temperature sensor
by unscrewing it from the exhaust manifold
(See Fig. 7.4).
Figure 7.4
Exhaust Sensor Connector Location
13. Disconnect the air/fuel valve wire harness,
the 12 pin connector, from the control panel.
14. Disconnect wires #24 and #17 from the
blower proof switch (See Fig. 7.5).
Figure 7.5
Blower Proof Switch Wire Locations
15. Loosen the hose clamp on the air/fuel valve
inlet and slide the clamp back towards the
blower (See Fig. 7.6).
35
MAINTENANCE
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