Keston Thermomatic RSM20/FB, Инструкция по установке и обслуживанию, Страница: 44 / 46

Page 44 (A4)
PRESSURE RELIEF VALVE:
-Remove the front and the right panels. Then empty the boiler.
-Unscrew and remove the pressure relief valve.
HONEYWELL GAS CONTROL VALVE:
-Close the gas cock in the boiler.
-Remove the front panel.
-Unscrew the fixing screw and remove the electronic control box from the electrical connector on
the gas control valve.
-Unscrew the gas inlet and outlet connections from the gas control valve and remove the valve.
-If the valve needs to be replaced, unscrew the small flanges at the gas inlet and outlet, and fit
them to the new valve.
Warning:
When fitting the small flanges back, take care to fit the flange with calibrated hole at the gas outlet
side of the gas control valve.
WATER CIRCULATING PUMP:
-Remove the front and the right panels, then empty the boiler.
-Unscrew the specific screws and open the electrical contact cover on the pump.
-Disconnect the electrical contacts, included the earth contact.
-If necessary, unscrew the two screws that fix the pump body.
Important:
Check that the pump be set at a velocity that suits the system.
EXPANSION TANK:
-Remove the front panel and empty the boiler.
-Unscrew the connection and remove the tank, taking care to cause no damage to the washer.
HONEYWELL ELECTRONIC CONTROL BOX:
-Remove the front panel.
-Unscrew the fixing screw and remove the box from the electrical connector on the gas valve.
-Disconnect the electrical connector of the control box.
Important:
When fitting the box back, do not forget the insulating washer which must be fitted underneath
the box.
ANTI-CON DENS ATE THERMOSTAT:
-Remove the front and the right panels.
-Disconnect the electrical contacts.
-Remove the thermostat probe (see drawing at page 15).
-Unscrew the two fixing screws and remove the thermostat.
Important:
When fitting the thermostat back, take care to carry out the electrical connections following
exactly the wiring diagram (see page 9).
HOT DOMESTIC WATER PRIORITY THERMOSTAT:
-Remove the front panel and disconnect the electrical contacts.
-Unscrew the two fixing screws and remove the thermostat.
AUTOMATIC AIR VENT VALVE:
-Remove the front panel and, if necessary, also the top cover.
-Unscrew and remove the vent valve.