Technical information

Make sure there is sufficient heat removal
by turning on the central heating system.
Activate the chimney sweeper function
(See Section 24. The burner will now
operate at maximum capacity.
Read the CO
2
value displayed on the
exhaust gas analysis equipment. If this
value does not agree with the correct value
as specified in the following table, you must
carefully adjust the screw (1) (Fig. 5.1).
Turn it counter clockwise in order to
increase the CO
2
value and clockwise in
order to reduce it.
Set the burner to minimum capacity
(See Section 23).
Read the CO
2
value displayed on the
exhaust gas analysis equipment. If the
value does not agree with the correct value
specified in the following table you must
carefully adjust the Torx-Screw (2) with aid
of a Torx screwdriver.
For this purpose you must temporarily
remove the plug (3). Turn it clockwise in
order to increase the CO
2
value and counter
clockwise in order to reduce it.
Switch off the output test function again and
adjust the central heating capacity to the
original value. See Section 23.
CO
2
natural gas propane gas
maximum
capacity
8.8% 9.8%
minimum
capacity
8.2% 9.2%
Remember to allow 2 minutes for the
analyser to respond to any adjustments.
Figure 21 Gas valve adjustments
EC 25 Compact Installation/User Manual page
35