Daikin EHYKOMB33AA3 [31/44] Commissioning
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Daikin EHYKOMB33AA3 [31/44] Commissioning

Daikin EHYKOMB33AA3 [31/44] Commissioning
10 Commissioning
Installation and operation manual
31
EHYKOMB33A
Daikin Altherma hybrid heat pump – gas boiler module
4P353067-1K – 2020.10
Off
The gas boiler is out of operation but is supplied with electric power.
There will be no response on space heating and/or domestic hot
water demands. Frost protection is active. This means that the
exchanger is heated up if the water temperature in the gas boiler is
too low. If applicable, the keep hot function will also be active.
If frost protection or keep hot function is activated, will be displayed
(heating the exchanger). In this mode, the pressure (bar) in the
space heating installation can be read on the main display.
Waiting mode (blank service display)
The LED at the button is lit and possibly also one of the LEDs for
the domestic hot water comfort function. The gas boiler is waiting for
a space heating and/or domestic hot water demand.
Pump overrun of space heating
After each space heating operation, the pump continues to run. This
function is controlled by the indoor unit.
Boiler shutdown when the required temperature is reached
The boiler controller can temporarily stop the requested space
heating demand. The burner will stop. The shutdown occurs
because the requested temperature is reached. When the
temperature drops too fast and the anti-cycle time has passed, the
shutdown will be cancelled.
Self-test
The sensors check the boiler controller. During the check-up, the
boiler controller does NOT perform any other tasks.
Ventilation
When the appliance is started, the fan goes to starting speed. When
the starting speed is reached, the burner is lit. The code will also be
visible when post-ventilation is taking place after the burner has
stopped.
Ignition
When the fan has reached its starting speed, the burner is ignited by
means of electric sparks. During ignition the code will be visible on
the service display. If the burner does NOT ignite, a new ignition
attempt occurs after 15 seconds. If after 4 ignition attempts the
burner is NOT yet burning, the boiler will go into fault mode.
Domestic hot water operation
Not applicable for Switzerland
The domestic hot water supply has priority over space heating
performed by the gas boiler. If the flow sensor detects a domestic
hot water demand of more than 2 l/min, space heating by the gas
boiler will be interrupted. After the fan has reached speed code and
ignition is done, the boiler controller goes into domestic hot water
mode.
During the domestic hot water operation, the fan speed and hence
the appliance power are controlled by the gas boiler controller so
that the domestic hot water temperature reaches the domestic hot
water temperature setting.
The domestic hot water supply temperature must be set on the user
interface of the hybrid module. See the user reference guide for
more details.
Domestic hot water comfort function/Frost protection/Keep
hot function
Not applicable for Switzerland
appears on the display when either the domestic hot water comfort
function, the frost protection function or the keep hot function is
active.
space heating operation
When a space heating request is received from the indoor module,
the fan is started, followed by the ignition, and the space heating
operation mode. During the space heating operation, the fan speed
and hence the appliance power are controlled by the gas boiler
controller so that the space heating water temperature reaches the
desired space heating supply temperature. During the space heating
operation, the requested space heating supply temperature is
indicated on the operating panel.
The space heating supply temperature must be set on the user
interface of the hybrid module. See the user reference guide for
more details.
10 Commissioning
INFORMATION
Protective functions – "Installer-on-site mode". The
software is equipped with protective functions, such as
room antifrost. The unit automatically runs these functions
when necessary. (If the user interface home pages are off,
the unit will not operate automatically.)
During installation or service this behaviour is undesired.
Therefore, the protective functions can be disabled:
▪ At first power-on: The protective functions are
disabled by default. After 36h they will be automatically
enabled.
▪ Afterwards: An installer can manually disable the
protective functions by setting [4‑0E]=1. After his work
is done, he can enable the protective functions by
setting [4‑0E]=0.
Especially for UK:
It is a requirement that the boiler is installed and commissioned to
the manufacturer’s instructions and the data fields on the
commissioning checklist completed in full.
To instigate the boiler guarantee the boiler needs to be registered
with the manufacturer within one month of the installation.
To maintain the boiler guarantee it is essential that the boiler is
serviced annually by a Gas Safe registered engineer who has been
trained on the boiler installed. The service details should be
recorded on Service Interval Record and left with the householder.
10.1 To perform a gas pressure test
1 Connect a suitable gauge on the gas valve. Static pressure
MUST be 20mbar.
2 Select test program " ". See "10.2To perform a test run on the
gas boiler" [4 32]. Static pressure MUST be 20 mbar (+ or –
1 mbar). If the working pressure is <19 mbar, the gas boiler

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