Daikin Altherma 3 H F, Installer'S Reference Manual

Page: 107 / 216

10 | Configuration
Installer reference guide
107
EPGA11~16DAV3(7) + EA23DA6V(7)+9W
Daikin Altherma 3 H F
4P556075-1A – 2021.09
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 operation –if
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 [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.
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.
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.