Daikin Altherma 3 GEO Series - Page 185

10 | Configuration
Installer reference guide
185
EGSAH/X06+10UDA9W
Daikin Altherma 3 GEO
4P598592-1A – 2019.12
Operation
# Code Description
[9.3.8] [4‑00] Backup heater operation:
▪ 0: Restricted
▪ 1: Allowed
▪ 2: Only DHW Enabled for domestic hot water,
disable for space heating
Maximum capacity
During normal operation the maximum capacity is:
▪ 3kW for a 230V, 1N~unit
▪ 6kW for a 400V, 3N~unit
The maximum capacity of the backup heater can be limited. The set value depends
on the used voltage (see table below) and is then the maximum capacity during
emergency operation.
# Code Description
[9.3.5] [4-07]
(1)
0~6kW when voltage is set to 230V, 1N~
0~9kW when voltage is set to 400V, 3N~
(1) If the value [4-07] is set lower, then the lowest value will be used in all operation
modes.
Emergency
Emergency
When the heat pump fails to operate, the backup heater can serve as an
emergency heater. It then takes over the heat load either automatically or by
manual interaction.
▪ When Emergency is set to Automatic and a heat pump failure occurs, the
backup heater automatically takes over the domestic hot water production and
space heating.
▪ When Emergency is set to Manual and a heat pump failure occurs, the
domestic hot water heating and space heating stops.
To manually recover it via the user interface, go to the Malfunctioning main
menu screen and confirm whether the backup heater can take over the heat load
or not.
▪ Alternatively, when Emergency is set to:
- auto SH reduced/DHW on, space heating is reduced but domestic hot
water is still available.
- auto SH reduced/DHW off, space heating is reduced and domestic hot
water is NOT available.
- auto SH normal/DHW off, space heating operates as normally but
domestic hot water is NOT available.
Similarly as in Manual mode, the unit can take the full load with the backup
heater if the user activates this via the Malfunctioning main menu screen.
To keep energy consumption low, we recommend to set Emergency to auto SH
reduced/DHW off if the house is unattended for longer periods.