8 Configuration
Installation and operation manual
29
EHYKOMB33A
Daikin Altherma hybrid heat pump – gas boiler module
4P353067-1K – 2020.10
a
b
c
d
a
Coupling
b
Gas mixing tube
c
O-ring
d
Gas metering ring
INFORMATION
The gas boiler is configured for operation with gas type
G20 (20 mbar). However, if the gas type present is G25
(25 mbar), the gas boiler can still be operated without
modification.
About the CO
₂
setting
The CO
2
setting has been set in the factory and in principle requires
no adjustments. The setting can be checked by measuring the CO
2
percentage in the combustion gases. In case of possible disturbance
of the adjustment, replacement of the gas valve or conversion to
another gas type the adjustment must be checked and if necessary
set according to the instructions below.
Always check the CO
2
percentage when the cover is open.
To check the CO
₂
setting
1
Switch off the heat pump module with the user interface.
2
Switch off the gas boiler with the button. appears on the
service display.
3
Remove the front panel from the gas boiler.
4
Remove the sampling point (a) and insert a suitable flue gas
analyser probe.
a
INFORMATION
Make sure the start-up procedure of the analyser is
completed before inserting the probe into the sampling
point.
INFORMATION
Allow the gas boiler to operate steadily. Connecting the
measuring probe before stable operation can give incorrect
readings. It is recommended to wait at least 30 minutes.
5
Switch on the gas boiler with the button and create a space
heating demand.
6
Select High setting by simultaneously pressing
and twice.
Capital will appear on the service display. The user interface
will display
Busy
. Do NOT test when lowercase is displayed. If
this is the case, press
and again.
7
Allow readings to stabilise. Wait for at least 3 minutes and
compare the CO
2
percentage with the values in the table below.
CO
2
value at maximum
power
Natural gas
G20
Natural gas
G25
Propane P
G31
Maximum value
9.6
8.3
10.8
Minimum value
8.6
7.3
9.8
8
Note down the CO
2
percentage at maximum power. This is
important with regard to the next steps.
CAUTION
It is NOT possible to adjust the CO
2
percentage when test
program is running. When the CO
2
percentage deviates
from the values in the table above, please contact your
local service department.
9
Select Low setting by simultaneously pressing
and buttons
once. will appear on the service display. The user interface
will display
Busy
.
10
Allow readings to stabilise. Wait for at least 3 minutes and
compare the CO
2
percentage with the values in the table below.
CO
2
value at minimum
power
Natural gas
G20
Natural gas
G25
Propane P
G31
Maximum value
(a)
Minimum value
8.4
7.4
9.4
(a)
CO
2
value at maximum power recorded at High setting.
11
If the CO
2
percentage at maximum and minimum power is
within the range expressed in the tables above, the CO
2
setting
of the boiler is correct. If NOT, adjust the CO
2
setting according
to the instructions in the chapter below.
