Instruction manual

11
SYSTEM PRESSURE
6 720 643 356a (2010/10)
4SYSTEM PRESSURE
4.1 SEALED HEATING SYSTEMS
This boiler is fitted to a sealed heating system which is pre-pressurised. Your installer will advise you
of the minimum and maximum pressure indicated on the pressure gauge.
B Check regularly that the pressure is maintained.
Fig. 7 Optimum pressure when cold (area A)
B Contact your installer or maintenance engineer if a permanent significant decrease or increase in
pressure is indicated on the pressure gauge.
The filling method will be one of two types:
• Optional integral filling kit, which is supplied with a white T shaped filling key.
• An external filling loop, fitted valves and flexible hose.
6720643356-11.1Wo
2
3
1
04
bar
1
A
Min
1 bar
1.5 bar
Max