Intergas Heating Ltd
39
Examples :
CO
2
adustment at low setting for natural gas
The CO
2
percentage low setting must be equal to or max. 0.3 % lower than the
percentage at high setting. Important: The CO
2
percentage at low setting must never
be under 8.6%.
Example 1:
CO
2
percentage at high setting is 9.2 %
then CO
2
percentage at low setting
must be 8.9 – 9.2 % .
Example 2:
CO
2
percentage at high setting is 8.7 %
then CO
2
percentage at low setting
must be 8.6 – 8.7 % .
CO
2
adjustment at low setting for propane (G31)
The CO
2
percentage at low setting must be between 0.3 % and 0.6 % lower than
the percentage at high setting. Important: The CO
2
percentage at low setting must
never be under 9.3 %.
Example 1:
CO
2
percentage at high setting is 10.5 %
then CO
2
percentage at low
setting must be 9.9 – 10.2 %
Example 2:
CO
2
percentage at high setting is 9.8 %
then CO
2
percentage at low setting
must be 9.3 – 9.5 % .
10.9 Conversion to different gas type
CAUTION
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.
10.9.1 Converting to L.P.G
1. Switch the boiler off and isolate the boiler from the mains power.
2. Close the gas tap.
3. Remove the front panel from the appliance.
4. Unscrew the coupling (A) above the gas valve and twist the gas mixing tube
towards the rear (B).
5. Replace the O-ring (C) and the gas restriction (D) with the rings from the
conversion set.(5.05 for 18SB. 5.50 for 24,30,and 40SB)
6. Re-assemble in reverse sequence.
7. Open the gas tap.
8. Check the gas connections before the gas valve for gas-tightness.
9. Switch on the mains power.
10. Check the gas connections after the gas valve for gas-tightness (during
operation).
11. Now check the setting of the CO
2
percentage at high setting (H in display) and
low setting (L in display).
CAUTION
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 Intergas Heating.
For adjusting CO
2
percentage at low setting see § 10.8
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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