ADJUSTMENTS/REPLACEMENTSOF
COMPONENTS
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.
DANGER-SHOCKHAZARD
Make sure electrical power to the heater is disconnect- ed to avoid potential serious injury or damage to com- ponents.
1.Gas Valve Replacement
a)Shut off electrical power and gas supply to the heater.
b)Remove gas piping to gas valve inlet.
c)Disconnect wiring connections, pilot tubing (when equipped).
d)Remove screws (2) holding the burner tray.
e)Slide burner tray out.
f)Remove gas valve bracket screws and bracket.
g)Unscrew gas valve from gas pipe.
h)Reverse above procedure to
2.Pilot Burner Cleaning or Replacement (Standing Pilot)
a)Shut off electrical power and gas supply to the heater.
b)Disconnect gas piping to gas valve.
c)Disconnect wiring connections to gas valve.
d)Remove screws (2) holding the burner tray.
e)Slide burner tray out.
f)Remove screw holding pilot lighter tube.
g)Remove screws (2) holding pilot bracket on the burner tray.
h)Disconnect thermocouple and pilot tubing from the gas valve.
i)Remove pilot burner from pilot bracket.
j)Remove pilot orifice and blow away lint or dirt. Clean with wire or small brush.
NOTE: Make sure pilot orifice is clear, but do not enlarge the hole.
k) Reverse above procedure to
HONEYWELL PILOT | ROBERTSHAW PILOT |
PILOTPILOT
AIR
OPENING
ORIFICE 
ORIFICE
3.Flame
a)Shut off electrical power to the heater.
b)Remove wiring connections to switch.
c)Remove screws (2) holding the switch.
d)Reverse above procedure to
4.Vent Thermal Switch Replacement
a)Shut off electrical power to the heater.
b)Remove wiring connections to switch.
c)Remove the screws (2).
d)Reverse above procedure to
5.Ignition Module Replacement
a)Shut off electrical power to the heater.
b)Remove control cover screws and open control compartment.
c)Disconnect wiring connections to module.
d)Remove screws (2) holding module.
e)Reverse above procedure to
6.Transformer Replacement
a)Shut off electrical power to the heater.
b)Remove control cover screws and open control compartment.
c)Disconnect wiring connections from transformer leads.
d)Remove screws (2) holding transformer.
e)Reverse above procedure to
7.Circulator Replacement
a)Shut off electrical power to the heater.
b)Shut off water supply and open drain valve to remove water in the piping at the pump level.
CAUTION: To avoid damage to electrical components keep water from getting into the control compartments and gas valve.
c)Disconnect wiring and conduit connections to the pump.
d)Remove the nuts and bolts at the inlet and outlet flanges. Remove old gaskets.
e)Remove the pump.
f)Reverse the above procedure to
Fig.# 8102.1
Fig.# 8045.2
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