Daikin EHYHBH05AAV3 Service Manual page 28

Functionality
1 1
Domestic hot water
and space heating
mode
3
4
5
Part 1 – System Outline
Depending on the mode (heat pump only / hybrid / gas boiler only) we can generate domestic hot water
and heating as follows:
During heat pump only operation, the heat pump remains operational and the gas boiler is
bypassed / domestic hot water will be generated by boiler only on demand. Both can happen
parallel.
During hybrid operation, the system will automatically switch one or both units to ON for heating
accordantly to the settings in ecological / economical / domestic hot water will be generated by
boiler only on demand. Both can happen parallel.
During gas boiler only operation, the internal pump is running and the gas boiler will serve heating
/ domestic hot water will be generated by boiler only on demand. Only one mode can be in time.
a b
c
a
b
c
d
e
d e c
PUMP
RADIATOR
Outdoor unit
Indoor unit
Plate heat exchanger
Gas boiler
3-way valve
28
ESIE13-02A