44
INSTALLER
ENGLISH
FILLING AND EMPTYING THE SYSTEM
MI
RI
1
THC V E OIL BLU
boilers require a filling pipe connect-
ed to the central heating circuit return pipe.
b
See Appendix II for further information on water tre-
atment for the central heating system.
FILLING THE CENTRAL HEATING SYSTEM
- Make sure that the boiler’s drain cock (1) is closed
before you start filling the system.
- Open any non-return valves in the CH circuit to facilitate
filling.
- Slacken off the cap of the automatic vent valve (2) to let
air out of the system.
- Open the central heating circuit shut-off cocks and
slowly fill the system until the pressure gauge (3) reads
out value of
1 .5 bar
(cold).
- Close the shut-off cocks and tighten down the cap on
the automatic vent valve (2).
- Close the CH circuit's non-return valves.
2
3
THC V 35 E OIL BLU
3
2
THC V 55 E OIL BLU