Daikin Altherma EHBH08DA6V7 - Emergency

8 | Configuration
Installer reference guide
166
ERGA04~08DAV3(A) + EHBH/X04+08DA*V7
Daikin Altherma 3 R W
4P618958-1 – 2020.03
# Code Description
[9.4.4] [4-03] ▪ 2: The booster heater is allowed outside the
operation range of the heat pump for domestic
hot water operation.
Booster heater operation is only allowed if:
- Ambient temperature is out of the operating
range: T
a
<[5‑03] or T
a
>35°C
The booster heater is only allowed to operate
when T
a
<[5‑03] if space heating priority is
enabled ([5‑02]=1).
- Domestic hot water temperature is 2°C lower
than the heatpumpOFF temperature.
If bivalent operation is enabled ([C‑02]=1) and
permission signal for auxiliary boiler is ON, the
booster heater will be restricted even when
T
a
<[5‑03].
9.4.4 [4-03] ▪ 3: The booster heater is allowed when the heat
pump is NOT active in domestic hot water
operation.
Same as setting1, but simultaneous heatpump
domestic hot water operation and booster
heater operation is not allowed.
9.4.4 [4-03] ▪ 4: Booster heater operation is NOT allowed
except for "Disinfection function".
Only use this in case the capacity of the
heatpump can cover the heating requirements
of the house and domestic hot water over the
complete heating season.
The booster heater will not be allowed to
operate when T
a
<[5‑03] and [5‑02]=1. The
domestic hot water temperature can be
maximum the heat pump OFF temperature.
Emergency
Emergency
When the heat pump fails to operate, the backup heater and/or booster heater
can serve as an emergency heater and take 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 heat load,
- the booster heater in the optional tank automatically takes over the domestic
hot water production.
▪ When Emergency is set to Manual and a heat pump failure occurs, the
domestic hot water operation 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 and/or booster heater can
take over the heat load or not.
We recommend to set Emergency to Automatic if the house is unattended for
longer periods.