Central Heating System Pressure; To Shut Off The Boiler - Potterton Performa 24 User Operating Instructions Manual

Pressure Gauge
2
bar
Fig. 12
Normal Pressure (when cold)
2
bar
Fig. 13
Normal Pressure (operating)
2
bar
Fig. 14
Fault
2
bar
Fig. 15
Below Minimum
ON/OFF/RESET
Selector Switch
Reset
Fig. 16
OFF Position
6
2.0 Operating the Boiler
2.6

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. 12 & 13).
3. A pressure of 3 or greater indicates a fault.
The safety pressure relief valve will operate, at a
pressure of 3 (Fig. 14). It is important that your
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. 15).
5. The system must be re-pressurised by your
Service Engineer.
Fig. 18
2.7

To Shut Off the Boiler

1. For short periods: Turn the selector switch to
the Off position (Fig. 16).
2. For long periods: Turn off the selector switch
(Fig. 16), 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).
Fig. 20