LAARS IGE-199C-5(N,X) - Service Manual - Manual (Page 50)

IGE - 9. Removal of the Gas Valve Assembly:
CAUTION
120 volt potential exposure. Isolate the appliance
and reconfirm power has been disconnected
using a multimeter.
a. Remove the burner manifold, refer to
section 8-a,b,c.
b. Remove the four (4) Phillips screws that
hold the gas connection and gas control
valve in place at the bottom of the unit.
Pull the gas connection down to
disconnect it from the gas valve assembly.
Inspect o-ring for damage and/or defects.
Ensure o-ring is in place when
re-assembling this connection.
c. Disconnect connectors from solenoids,
note which connector goes to each
solenoid, along with the proper wire
colors. Pull gas valve assembly out of unit.
IGE - 10. Removal of Heat Exchanger:
CAUTION
120 volt potential exposure. Isolate the appliance
and reconfirm power has been disconnected
using a multimeter.
a. Remove PCB unit, refer to section 2-a.
b. Remove the heat exchanger water
connection lines, refer to section 3-a.
c. Remove the three (3) Phillip screws
securing the gas manifold assembly to the
gas control valve.
d. Remove the six (6) Phillip screws that
secure the heat exchanger assembly in
place.
e. Disconnect connectors B1, B5, B6, C1, C3,
F1and F8. These are the igniter, flame rod,
thermo-fuse, hot water inlet and outlet
thermistor, and the anti-freeze heater
connections.
f. Pull the heat exchanger out of the heater.
g. Transfer all components found on the old
heat exchanger over to the new exchanger.
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