8 | Configuration
Installer reference guide
125
ERGA04~08DAV3(A) + EHBH/X04+08DA*V7
Daikin Altherma 3 R W
4P618958-1 – 2020.03
Main zone unit control method [2.9] Description
External room thermostat control
([C‑07]=1)
Allow for the external room thermostat to
take care of room frost protection:
▪ Set [C.2] Space heating/
cooling=On.
Room thermostat control
([C‑07]=2)
Allow for the user interface used as room
thermostat to take care of room frost
protection:
▪ Set antifrost [1.4.1] Activation=Yes.
▪ Set the temperature of the antifrost
function in [1.4.2] Room setpoint.
INFORMATION
If a U4 error occurs, room frost protection is NOT guaranteed.
NOTICE
Room frost protection. Even if you turn OFF space heating/cooling operation ([C.2]:
Operation > Space heating/cooling), room frost protection –if enabled– will
remain active.
For more detailed information about room frost protection in relation to the
applicable unit control method, see the sections below.
Leaving water temperature control ([C‑07]=0)
Under leaving water temperature control, room frost protection is NOT
guaranteed. However, if room antifrost [1.4] is activated, limited frost protection
by the unit is possible:
If... Then...
Space heating/cooling is OFF and
the outdoor ambient temperature
drops below 4°C
The unit will supply leaving water to the
heat emitters to heat up the room
again, and the leaving water
temperature setpoint will be lowered.
Space heating/cooling is ON and
the operation mode is "heating"
The unit will supply leaving water to the
heat emitters to heat up the room
according to normal logic.
Space heating/cooling is ON and
the operation mode is "cooling"
There is no room frost protection.
External room thermostat control ([C‑07]=1)
Under external room thermostat control, room frost protection is guaranteed by
the external room thermostat, provided that Space heating/cooling [C.2] is
turned ON and the emergency setting [9.5] is set to automatic.
In case of one leaving water temperature zone:
If... Then...
Space heating/cooling is OFF and
the outdoor ambient temperature
drops below 4°C
The unit will supply leaving water to the
heat emitters to heat up the room
again, and the leaving water
temperature setpoint will be lowered.
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