Ariston CLAS HE R 12 Installation And Servicing Instructions page 59

4.5 GAS VALVE
Tools
1
Remove the combustion
assembly (see 4.3)
1
2
Gas inlet
1. Venturi
. Gas valve
3. Solenoids
Twist the gas valve anti-clockwise to
disengage it from the fan
Gas outlet
3
LEGEND
MAINTENANCE GUIDE
Time
Replacement Gas Valves are
not factory set and will need to
be set up ( see page 39)
4. Inlet test niple
5. Offset adjustment
6. Throttle adjustment
15 min
4
5
6
59