Installation manual

Installation and servicing instructions strictly reserved for qualified gas installers
35
Attach combustion analyser to the
combustion test point.
Turn on the mains electrical supply and
turn on the gas service clock. Switch
the boiler on.
Fully open a hot water tap.
W
ait for 2 minutes or so, until the CO2
reading has stabilized.
Adjust the screw (2) to obtain the CO2
value stated in the following table using
the following principal:
-
To increase the CO2 value, turn the
screw anti-clockwise.
- To decrease the CO2 value, turn the
screw clockwise.
Note: After re-fitting the inner front case,
the CO2 values must correspond to that
given in the following table.
9.2 Minimum rate
Remove the front panel and the inner
panel
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Ensure that the gas analyser is set to
the correct fuel setting - Propane.
Attach combustion analyser to the
combustion test point.
T
urn on the mains electrical supply and
turn on the gas service cock. Switch
the boiler on.
Adjust the heating output to minimum
using menu 1 described in the chapter
‘
‘Access to the boilers technical data’’.
Wait for 2 minutes or so, until the CO2
reading has stabilized.
Adjust the screw (1) to obtain the CO2
value stated in the following table using
the following principal:
-
To increase the CO2 value, turn the
screw clockwise.
- To decrease the CO2 value, turn the
screw anti-clockwise.
Note:
After re-fitting the inner front case,
the CO2 values must correspond to that
given in the following table.
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Gas changing adjustment Unit G20 G31
Heating output max. hot water kW 34.2
Heating
output min. heating kW 8
CO2
case on % 9
+/- 0.2 10.1 +/- 0.2
CO2 case off % 9.2
+/- 0.3 10.3 +/- 0.3
9.3 Reactivation
After setting and reassembly, restore
the maximum heating power to its initial
value (20 kW).
Stick the gas data label close to the
nameplate.
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