ADJUSTMENT/REPLACEMENTOF
COMPONENTS
DANGER - SHOCK HAZARD
Make sure electrical power to the boiler is disconnect- ed to avoid potential serious injury or damage to com- ponents.
1.Gas Valve Replacement
a)
boiler.
b)Remove gas piping to gas valve inlet.
c)Disconnect wiring connections, pilot tubing (when present).
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)
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 |
PILOT
PILOT
AIR
OPENING
ORIFICE
ORIFICE
Fig.# 8045.2 | Fig.# 8102.1 |
3.Flame
a)
b)Remove wiring connections to switch.
c)Remove screws (2) holding the switch.
d)Reverse above procedure to
4.Vent Thermal Switch Replacement
a)
b)Remove wiring connections to switch.
c)Remove the screws (2).
d)Reverse above procedure to
5.Ignition Module Replacement
a)
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)
b)Remove control cover screws and open control compartment.
c)Disconnect wiring connections from trans- former leads.
d)Remove screws (2) holding transformer.
e)Reverse above procedure to
7.Pump Relay Replacement
a)
b)Remove control cover screws and open control compartment.
c)Disconnect wiring to the relay.
d)Remove screws (2) holding relay.
e)Reverse above procedure to
8.High Limit Control
a)
b)Remove control cover screws and open control compartment.
c)The control is factory set at 180°F. To adjust setting, use a small screw driver and turn dial
clockwise 
to lower the temperature or
to raise the setting.
d)To replace the limit control, disconnect the wir- ing connections.
e)Remove screws (2) holding the limit control.
f)Remove upper access panel.
g)Remove the wedge or retaining clip holding the sensing bulb in the control well in the in/out header.
h)Pull out the sensing bulb carefully from the control well.
i)Remove the limit control with capillary from unit.
j)Reverse above procedure to
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