Work on gas carrying parts may only be carried out by
a qualified competent person.
If a different type of gas is connected to the appliance than that for which the
appliance has been set by the manufacturer, the gas metering ring should be
replaced. Conversion sets for other types of gas are available to order.
1.1.1 Converting the gas restriction.
B. Switch the boiler off and isolate the boiler from the mains power.
C. Close the gas tap.
D. Remove the front panel from the appliance.
E. Unscrew the coupling (A) above the gas valve and twist the gas mixing tube
towards the rear (B).
F. Replace the O-ring (C) and the gas restriction (D) with the rings from the
conversion set.
G. Re-assemble in reverse sequence.
H. Open the gas tap.
I. Check the gas connections before the gas valve for gas-tightness.
J. Switch on the mains power.
K. Check the gas connections after the gas valve for gas-tightness (during
operation).
L. Now check the setting of the CO
2
percentage at high setting (H in display) and
low setting (L in display).
It is not possible to adjust the CO
2
percentage at high
setting. When the CO
2
percentage at high setting is not
within the prescribed tolerance band please contact your
suppliers.
For adjusting CO
2
percentage at low setting see § 8.9 .
Place a sticker for the gas type set over the existing sticker next to the gas valve.
Place a sticker for the gas type set next to the identification plate.
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