Ariston GENUS 47-116-08 Service Manual - Page 2

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1. SERVICING INSTRUCTIONS

1.1 Replacement of Parts

1.2 To Gain General Access

- Removing the Front Panel

- Removing the Bottom Cover

- Removing the Side Panels

1.3 Access to the Combustion Chamber

- Removing the Sealed Combustion Chamber

- Removing the Burner and Injectors

- Removing the Electrodes

- Removing the Main Heat Exchanger

- Removing the Air Pressure Switch

- Removing the Venturi Device

- Removing the Fan

1.4 Servicing and Removal of the Gas Valve

- Setting Gas Pressure

- Removing the Spark Generator (SIT Sigma Gas Valve)

- Removing the Spark Generator (SIT Tandem Gas Valve)

- Removing the Gas Valve

1.5 Access to the Hydraulic Circuit

- Removing the D.H.W. (Secondary) Exchanger

- Removing the Safety Valve

- Removing the Automatic Air Vent

- Removing the Main Flow Circuit Switch

- Removing the Pump

- Removing the Pressure Gauge

- Removing the Expansion Vessel

- Removing the Overheat Thermostat

- Removing the Heating Temperature Sensor (N.T.C.)

- Removing the D.H.W. Temperature Sensor (N.T.C.)

- Removing the Diverter Valve (Genus 27 RFFI Only)

1.6 Access 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)

2.2 Fault Finding Using the Total Check System

3. ELECTRICAL DIAGRAMS

3.1 Electrical Connection

3.2 Functional Flow Connection

4. SHORT SPARE PARTS LIST

Page No.

B005

Ariston GENUS 47-116-08 Service Manual - Page 2

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