Service Manual

VIII - Service Procedure

NOTE: Before proceeding with dismantling, be sure to follow the CAUTION instructions before

each explanation. Always disconnect the electrical supply, turn off water and gas supply

service valves, and drain all water from the unit before proceeding.

Only trained and qualified

service agencies should attempt to repair this product.

Service Procedure

IGI – 1. Removal of the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

IGI – 2. Removal of the

PC Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

IGI – 3. Removal of the

Water Flow Control and Sensor . . . . . . . . . . . . . . . . . . . . 49

IGI – 4. Removal of the

Ignition Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

IGI – 5. Removal of the Combustion Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

IGI – 6. Removal of the

Water Temperature Thermistor . . . . . . . . . . . . . . . . . . . . 50

IGI – 7. Removal of the

Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

IGI – 8. Removal of the

Burner and Burner Manifold . . . . . . . . . . . . . . . . . . . . . . 51

IGI – 9. Removal of the Gas Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

IGI – 10. Removal of the

Heat Exchanger Assembly. . . . . . . . . . . . . . . . . . . . . . . . 52

IGI – 11. Removal of the Thermal Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Re-assembly in all tasks listed above in the reverse order of dismantling (unless stated otherwise).