Daikin ETSX16E Installer's Reference Manual page 164

10 | Configuration
Installer reference guide
164
NOTICE
Room frost protection. Even if you turn OFF space heating/cooling operation ([C.2]:
Operation > Space
enabled– can still activate. However, for leaving water temperature control and
external room thermostat control, the protection is NOT guaranteed.
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=Off,
and
▪ Outdoor ambient temperature drops
below 6°C
▪ Space heating/cooling=On, and
▪ Operation mode=Heating
▪ Space heating/cooling=On, and
▪ Operation mode=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 1 leaving water temperature zone:
If...
▪ Space heating/cooling=Off,
and
▪ Outdoor ambient temperature drops
below 6°C
▪ Space heating/cooling=On, and
▪ The external room thermostat is
"Thermo OFF", and
▪ Outdoor temperature drops below
6°C
▪ Space heating/cooling=On, and
▪ The external room thermostat is
"Thermo ON"
In case of 2 leaving water temperature zones:
heating/cooling), room frost protection operation –if
▪ The unit will supply leaving water to
the heat emitters to heat up the room
again, and
▪ the temperature setpoint of the
leaving water 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.
▪ The unit will supply leaving water to
the heat emitters to heat up the room
again, and
▪ the temperature setpoint of the
leaving water will be lowered.
▪ The unit will supply leaving water to
the heat emitters to heat up the room
again, and
▪ the temperature setpoint of the
leaving water will be lowered.
Room frost protection is guaranteed by
the normal logic.
Then...
Then...
EPRA14~18D + ETSH/X(B)16P30+50E
Daikin Altherma 3 H HT ECH₂O
4P679467-1D – 2023.11