Checking; Temperature Control - Potterton Gold 24 HE Installation & Service Instructions Manual

Central Heating

Temperature Control

Display
Selector Switch
Reset
Central Heating
Temperature Control
Fig. 34
Fig. 37
30
Domestic Hot Water
Fig. 33
Temperature Control
bar
Domestic Hot Water
Temperature Control
Fig. 36
Fig. 38
9.0
9.3
1. The gas valve is factory set and the burner
x 2
pressure cannot be measured as it is altered by
suction of the fan and modulates as demand on the
boiler alters. The gas supply pressure should be
20mb.
2. If necessary the gas rate may be checked after
running the boiler for 10 minutes with any other
appliances and pilot lights turned off.
3. Ensure that the integral timer and any external
controls are calling for heat, and the selector switch is
in the central heating and hot water position (
The current boiler temperature is shown on the
display.
4. To check the gas rate it is necessary to set the
boiler to 'Calibration Mode'.
5. Turn both temperature control knobs fully
anticlockwise, then quickly turn the DHW temperature
2
knob
0 (Fig. 33).
GRASSLIN
6. The display will now alternate between 'SF' and
the current boiler temperature and both green LEDs
will flash (Figs. 34 & 35).
7. Turn CH temperature control knob fully clockwise.
As the knob is turned the display will change from '0'
to '00' (Fig. 36) indicating maximum rate, then revert
to 'P' alternating with the current boiler temperature
(Figs 37 & 38).
8. A gas rate measurement may now be made.
Approximate values are:-
Fig. 35
9. The 'Calibration Function' is active for 20 minutes
unless the maximum CH temperature is exceeded.
10. The function can be disabled at any time by
turning the DHW temperature knob.
COMMISSIONING

Checking

1 / clockwise twice and back fully anticlockwise
4
24 model - 2.6 m
28 model - 3.1 m
33 model - 3.6 m
Publication No. 5116282
).
3 /h
3 /h
3 /h