9 Operation
Installation and operation manual
30
EHYKOMB33A
Daikin Altherma hybrid heat pump – gas boiler module
4P353067-1K – 2020.10
12
Switch off the appliance by pressing the button and put the
sampling point back in its place. Make sure it is gastight.
13
Put the front panel back in its place.
CAUTION
Work on gas carrying parts may only be carried out by a
qualified competent person.
To adjust the CO
₂
setting
INFORMATION
Only adjust the CO
2
setting when you have checked it first
and are sure adjustment is necessary. In Belgium, any
modifications to the gas valve MUST be performed by a
certified representative of the manufacturer. For more
information, contact your dealer.
1
Remove the cap that covers the adjustment screw. In the
illustration, the cover cap is already removed.
2
Turn the screw (a) to increase (clockwise) or decrease
(counterclockwise) the CO
2
percentage. See the table below for
the desired value.
a
a
Adjusting screw with cover
Measured value at
maximum power
Adjustment values CO
2
(%) at
minimum power (front cover opened)
Natural gas 2H/2E
(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
10.0
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,
put the cover cap and the sampling point back in their place.
Make sure they are gastight.
4
Select High setting by simultaneously pressing
and twice.
Capital 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 indicating the CO
2
percentage at maximum power, contact your local dealer.
6
Press and simultaneously to exit the test program.
7
Put the front panel back in its place.
9
Operation
9.1
Overview: Operation
The gas boiler is a modulating, high-efficiency boiler. This means
that the power is adjusted in line with the desired heat requirement.
The aluminium heat exchanger has 2 separate copper circuits. As a
result of the separately constructed circuits for space heating and
domestic hot water, the heating and the hot water supply can
operate independently, but not simultaneously.
The gas boiler has an electronic boiler controller which does the
following when heating or hot water supply is required:
▪ starting the fan,
▪ opening the gas valve,
▪ igniting the burner,
▪ constantly monitoring and controlling the flame.
It is possible to use the domestic hot water circuit of the gas boiler
without connecting and filling the space heating system.
9.2
Heating
Heating is controlled by the indoor unit. The boiler will start-up the
heating process when there is a request from the indoor unit.
INFORMATION
For third-party gas boilers, prolonged boiler operation at
low outdoor temperatures might be temporarily interrupted
to protect the outdoor unit and water piping from freezing.
During this temporary interruption the boiler might appear
to be off.
9.3
Domestic hot water
Not applicable for Switzerland
Instant domestic hot water is supplied by the boiler. Because
supplying domestic hot water has priority over space heating, the
boiler will switch to domestic hot water mode whenever there is a hot
water demand. When a simultaneous space heating and domestic
hot water demand occurs:
▪ during heat pump only operation (space heating mode), the heat
pump will provide heat while the boiler is bypassed and switches
to domestic hot water mode to provide domestic hot water.
▪ during boiler only operation, and with the boiler in domestic hot
water mode, space heating will NOT be provided, but domestic
hot water will.
▪ during simultaneous heat pump and boiler operation, the heat
pump will provide heat and the boiler will be bypassed and switch
to domestic hot water mode to provide domestic hot water.
This manual only explains the domestic hot water making without
having a domestic hot water tank combined with the system. For the
operation and needed settings of domestic hot water in combination
with a domestic hot water tank needed for Switzerland, please see
the manual of the heat pump module.
INFORMATION
For EHY32AA, prolonged instant domestic hot
water operation at low outdoor temperatures might be
temporarily interrupted to protect the outdoor unit and
water piping from freezing.
9.4
Operation modes
The following codes on the service display indicate the following
operating modes.
