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Configuration
Installer reference guide
154
EWSAH/X06D
Daikin Altherma 3 WS
4P675764-1 – 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...
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:
▪
[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...
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, the
external room thermostat is "Thermo
OFF" and the outdoor 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 external room thermostat is
"Thermo ON"
Room frost protection is guaranteed by
the normal logic.
In case of two leaving water temperature zones:
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, the
external room thermostat is "Thermo
OFF", the operation mode is "heating"
and the outdoor 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.