Repressurising - Baxi Combi 133 HE Plus Operating Instructions Manual

3.0 Repressurising System
3.1 Central Heating System Pressure
1. The normal operating water pressure is in the green area
between 1 and 2.5 bar (Fig. 1). If the pressure exceeds 3 bar
normal pressure
the safety pressure valve will operate and a fault is indicated.
Contact your installer.
1 2
0 3
2. It may be necessary to repressurise the system occasionally
Fig. 1
(Fig. 2). A filling device (the 'filling loop') will be fitted on the
system. This may be on the boiler itself, or on pipework near
to the boiler.
3. If you are unsure of its position, or cannot identify it, consult
the installer who fitted the boiler.
4. The filling loop consists of two taps and a separate metal
requires
1 2
braided hose pipe (Fig. 3).

repressurising

3
0
5. Only when repressurising should the hose be connected
Fig. 2
between the two taps. No tools are necessary for this, but
ensure that the wing nuts on the hose pipe ends are tightened
onto the taps.
6. Fully open one of the taps first, and then while watching the
pressure gauge, carefully open the second tap.
Copper Pipe
7. When the needle on the gauge is into the green zone and
indicating 1 (Fig. 1) or more turn both taps off.
8. Disconnect the hose from the taps (a small amount of water
may be present) and remove it. Keep the hose in a safe place
for future use.
Taps
Copper Pipe
Hose
Fig. 3 Typical Filling Loop
Wing Nut
6
© Baxi Heating UK Limited 2005