About The System; About Freeze Protection; Components In A Typical System Layout - Daikin Intergas Altherma Hybrid User Reference Manual

3 About the system

3.1 About freeze protection

3.2 Components in a typical system layout

EJHA04AAV3 + NHY2KOMB28+32AA
Daikin Altherma Hybrid hydrosplit heat pump
4P556862-1A – 2020.10
Depending on the system layout, the system can:
▪ Heat up a space
▪ Produce domestic hot water
NOTICE
Filling the water circuit. Must be done by the installer to make sure that the system
can cold start up.
NOTICE
During holidays. Do NOT turn OFF the power supply. The power is needed for the
frost protection functions of the outdoor unit. Use the holiday mode instead.
Frost can damage the system. To prevent the hydraulic components from freezing,
the heat pump's software is equipped with special frost protection functions.
These functions activate the pump, the heat pump and the gas boiler when the
temperature becomes too low.
However, in case of a power failure, these functions cannot guarantee protection.
Therefore the installer provided extra protection by doing one of the following:
▪ The installer added glycol to the water circuit. Glycol lowers the freezing point of
the water.
▪ The installer installed freeze protection valves. Freeze protection valves drain the
water from the system before it can freeze.
Gas boiler (NHY2KOMB28+32AA) + instant domestic hot water (not for
Switzerland)
C
a
b c
d
B A
e
f
3 About the system
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User reference guide
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