Potterton Performa 24 User Manual page 7

Central Heating System Pressure
1. The water pressure in the central heating system is
indicated by the pressure gauge.
2. With the system cold and the boiler not operating
the pressure should be between 0.5 and 1.0 bar.
During operation the pressure should not exceed 2.5
bar, and will normally be between 1.0 and 2.0
(Figs. 10 & 11).
3. A pressure of 3 or greater indicates a fault. The
safety pressure relief valve will operate, at a pressure
of 3 (Fig. 12). It is important that your Installer or
Service Engineer is contacted as soon as
possible.
4. The minimum pressure for correct operation is 0.5.
If the pressure falls below 0.5, this may indicate a
leak on the central heating system (Fig. 13).
To Shut Off the Boiler
1. For short periods: Turn the selector switch to the
Off position (Fig. 14).
2. For long periods: Turn off the selector switch
(Fig. 14), electricity and gas supplies.
If your home is to be left unoccupied for long
periods during cold weather the boiler and whole
system should be drained unless equipped with
frost protection.
3. Your installer will advise you about frost protection
and draining the system.
IMPORTANT: When the selector switch is in
the '0' (Off) position the electrical supply to the
boiler is isolated. The boiler will not operate and
the integral timer (if fitted) will require resetting
once the selector switch is set to either
Position (i) or Position (ii).
© Baxi Heating UK Ltd 2007
Pressure Gauge
2
bar
Fig. 10
Normal Pressure (when cold)
2
bar
Fig. 11
Normal Pressure (operating)
2
bar
Fig. 12
Fault
2
bar
Fig. 13
Below Minimum
ON/OFF/RESET
Selector Switch
Reset
Fig. 14
OFF Position
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