Saunier Duval Semia Condens F24 E, Инструкция по использованию, установке и обслуживанию

Страница: 43 / 52

Installation and servicing instructions strictly reserved for qualifi
ed gas installers
41
15.3 To replace pump
- Drain down boiler heating circuit as fol-
lows:
- From below boiler, close isolating valves
on fl ow and return connections.
- Open boiler drain valve to right of
pump.
Note: It is not necessary to drain down entire
heating circuit to carry out this work.
- Gain access to the pump by lowering
the controls panel.
- Pull off electrical connection to pump.
- Supporting pump, unscrew pump con-
nection nuts at top and rear of pump.
Remove pump by lifting forward and
out of boiler.
- Fit replacement pump in reverse order
to removal.
- Open isolating valves on fl ow and return
connections,
- Refi ll, vent and pressurise boiler. Check
for leaks.
15.4 To replace gas valve
1
- Isolate boiler from gas supply.
- Gain access to the gas valve by lower-
ing the controls panel.
- Remove clear plastic sensing pipe from
gas valve.
- Unscrew and remove upper screw (1)
holding gas valve ignition box onto gas
valve body.
- Carefully pull off ignition box, leaving
electrical wiring connected, and move
clear of gas valve.
- Remove electrical connections to gas
valve modulating coil.
- Disconnect gas inlet cock from boiler.
- Undo nuts on gas valve to burner sup-
ply pipe and swing pipe clear of gas
valve.
- Unscrew and remove two screws secur-
ing gas valve to boiler lower frame.
- Fit replacement gas valve in reverse
order to removal.
Note: When refi tting electrical connections
to gas valve modulating coil, the polarity
is not important.