Daikin Altherma 3 WS EWSAH06UD 9W Series Installer's Reference Manual page 159

EWSAH/X06UD
Daikin Altherma 3 WS
4P675765-1 – 2022.04
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 [2‑06] is activated, limited frost protection
by the unit is possible:
If...
Space heating/cooling is OFF and
the outdoor ambient temperature
drops below 4°C
Space heating/cooling is ON and
the operation mode is "heating"
Space heating/cooling is ON and
the operation mode is "cooling"
External room thermostat control ([C‑07]=1)
Under external room thermostat control, room frost protection is guaranteed by
the external room thermostat, provided that:
▪ [C.2] Space heating/cooling=On, and
▪ [9.5.1] Emergency=Automatic or auto SH normal/DHW off.
However, if [1.4.1] Antifrost is activated, limited frost protection by the unit is
possible.
In case of one leaving water temperature zone:
If...
Space heating/cooling is OFF and
the outdoor ambient temperature
drops below 4°C
Space heating/cooling is ON, the
external room thermostat is "Thermo
OFF" and the outdoor temperature
drops below 4°C
Space heating/cooling is ON and
the external room thermostat is
"Thermo ON"
In case of two leaving water temperature zones:
If...
Space heating/cooling is OFF and
the outdoor ambient temperature
drops below 4°C
Space heating/cooling is ON, the
external room thermostat is "Thermo
OFF", the operation mode is "heating"
and the outdoor temperature drops
below 4°C
11
|
Then...
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.
The unit will supply leaving water to the
heat emitters to heat up the room
according to normal logic.
There is no room frost protection.
Then...
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.
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.
Room frost protection is guaranteed by
the normal logic.
Then...
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.
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.
Configuration
Installer reference guide
159