ROTEX Heating Systems GmbH
44
11 If the CO
2
percentage at maximum and minimum power is within the reach stated in the
above tables, the CO
2
setting of the boiler is correct. If NOT, adjust the CO
2
setting in
accordance with the instruction in the following chapter.
12 Switch off the unit by pressing the button and return the sample point to its position.
Make sure it is gas tight.
13 Return the front panel to its place.
CAUTION
Work on gas carrying parts may ONLY be carried out by
qualified, competent individuals.
Adjusting the carbon dioxide setting
IMPORTANT
Only adjust the CO
2
setting when you have first checked it and you have made
sure the adjustment is necessary. No adjustments may be made to the gas
valve without prior permission from your
local Rotex distributor. In Belgium, the gas valve may NOT be adjusted and/or
the seal may NOT be removed or broken. Contact your distributor.
1 Remove the cap (A) which covers the adjuster screw.
2 Turn the screw (B) to the right to increase the CO
2
percentage, and to the left to
decrease it. See the following table for the desired value.
Measured value at
maximum power
Set values CO
2
(%) at minimum power (front lid open)
Natural gas 2H
(G20, 20 mbar)
Propane 3P
(G31,30/50/37 mbar)
10.8
-
10.5±0.1
10.6
10.3±0.1
10.4
10.1±0.1
10.2
9.9±0.1
10
9.8±0.1
9.8
9.6±0.1
9.6
9.0±0.1
-
9.4
8.9±0.1
9.2
8.8±0.1
9.0
8.7±0.1
8.8
8.6±0.1
8.6
8.5±0.1
3 After measuring the CO
2
percentage and adjusting the setting, replace the cover
cap and the cap of the sample point. Make sure they are gas tight.
4 Select the High setting by twice pressing the and buttons simultaneously.
A capital letter will appear on the service display.
5 Measure the CO
2
percentage. If the CO
2
percentage still deviates from the
values in the table which indicates the CO
2
percentage at maximum power,
contact your local distributor.
6 Press + and - simultaneously to leave the test program.
7 Return the front panel to its place.
