WarmFlow GS25A, Руководство пользователя

Страница: 51 / 66

MAINTENANCE INSTRUCTIONS
TR05A140.B1107 49
6.6.5 Gas valve
•
Isolate the electricity, water and gas supplies to the
appliance;
•
Disconnect and remove the gas pipe connecting the
gas valve to the venturi;
•
Disconnect the gas feed pipe and valve ring nut at
the bottom of the room sealed chamber;
•
Remove the couplings of the existing valve and fit to
the new valve using new cork gaskets;
•
Replace the gas valve and reassemble the
components following the above procedure in
reverse order, replacing all the gas seals;
•
Switch on the gas supply and check for any gas
leaks using soapy water or leak detector spray;
•
Switch on the electricity and water supplies, switch
on and fire the appliance and repeat the checks for
leaks.
6.6.6 Circulating pump motor body
•
Isolate the electricity, water and gas supplies to the
appliance;
•
Drain the central heating circuit of the boiler (see
Section 6.4);
•
Use a 5 mm Allen key to unscrew the four screws
securing the motor body to the impeller body;
•
Remove the motor body and check the condition of
the gasket. Replace if necessary;
•
Replace the pump motor body and reassemble the
components following the above procedure in
reverse order;
•
Switch on the electricity, water and gas supplies;
•
Refill the system (see Sections 5.2) and check for
any leaks.
Figure 43: Gas valve
Gas valve
Couplings
Figure 44: Circulating pump
Pump motor body Pump impeller body