● Turn the gas valve “A” throttle screw (Ref fig. 6.1) fully clockwise.
● Turn the “A” throttle screw back anti-clockwise the required number of turns as stated in
table 9.1 for the boiler installed.
● Ensure the gas analyser is set to the correct fuel setting propane.
To obtain conversion follow the procedure as listed below.
● Ensure that the gas supply pressure is in the range 34 - 37mbar. The gas inlet working
pressure can be checked at the pressure test point on the gas valve (fig 5.3.).
● Turn gas supply on.
● Ensure there is an external heat demand.
● Enter the test programs by holding the “+” key, see fig 6.2. and turning power on.
● Press “+” until “P.1” is displayed for max rate.
● Press “ i ” to operate appliance in this mode.
● Allow appliance to stabilise.
● Measure the CO
2
at the combustion products test point, see fig 9.1.
● Check CO
2
value (for case off) as stated in table 6.1 for the boiler installed.
● If required, using a screwdriver, adjust the “A” throttle to obtain correct value. (rotating
anti-clockwise to increase).
● Appliance will remain in this mode for 15 minutes or exit by pressing “ i ” and “+”
simultaneously.
● Repeat the process above and select “P.2” for min rate.
● Press “ i ” to operate appliance in this mode.
● Allow appliance to stabilise.
● Check CO
2
value (for case off) as stated in table 6.1 for the boiler installed.
● If required, using a 2mm allen key, adjust the “B” offset to obtain correct value. (rotating
clockwise to increase)
● After checking the combustion, exit by pressing “ i ” and “+” simultaneously
● Refit the chassis panel and the inner case. (Note the CO
2
will increase slightly).
● Fit the LPG conversion label to the type plate.
● Lift the control box into place and fit the front casing.
● Commission the boiler as described in the Installation and Servicing Instructions
supplied with the boiler.
Fig. 6.1 Gas control valve
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