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1. SERVICING INSTRUCTIONS
1.1 REPLACEMENT OF PARTS
1.2 TO GAIN GENERAL ACCESS
- Lowering the control panel and removing the front panel
- Removing the side panels
1.3 A
CCESS TO THE COMBUSTION CHAMBER
- Removing the sealed chamber front cover
- Removing the fan
- Removing the burner
- Removing the electrodes
- Removing the heat exchanger inspection panel
- Removing the condensate collector
- Removing the condensate trap
- Removing the injector
1.4 A
CCESS TO THE GAS VALVE
- Removing the gas valve
1.5 A
CCESS TO THE WATER CIRCUIT
- Removing the D.H.W. (secondary) exchanger
- Removing the safety valve
- Removing the automatic air vent
- Removing the main circuit flow switch
- Removing the diverter valve actuator
- Removing the D.H.W. flow switch
- Removing the pump
- Removing the pressure gauge
- Removing the expansion vessel
- Removing the D.H.W. temperature sensor (N.T.C.)
- Removing the C.H. flow temperature sensor (N.T.C.)
- Removing the C.H. return temperature sensor (N.T.C.)
1.6 A
CCESS TO THE CONTROL SYSTEM
- Checking the fuses
- Removing the time clock
- Removing the P.C.B.s
2. FAULT FINDING
2.1 FAULT FINDING GUIDE (FLOW-CHART)
3. ELECTRICAL DIAGRAMS
4. SHORT SPARE PARTS LIST
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