Central Heating System Pressure; To Shut Off The Boiler; Boiler Frost Protection Mode - Potterton Gold 24 HE Installation & Service 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
Selector Switch
Reset
Fig. 16
OFF Position
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 at least 0.5 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
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.
15). Error Code E119 will be shown on the
display.

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 there is
additional 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 will require resetting once
the selector switch is set to either Position (i) or
Position (ii).

Boiler Frost Protection Mode

1. The frost protection feature will operate when
the selector switch is in the central heating and
domestic hot water mode.
The gas and electrical supplies to the boiler must
be on and the system pressure must be within the
range described above.
2. If the system temperature falls below 5°C, then
the boiler will operate until the water temperature
has been raised.
Publication No. 5116283