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10
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Configuration
Emergency
Installer reference guide
206
#
Code
[9.4.4]
[4-03]
9.4.4
[4-03]
9.4.4
[4-03]
Emergency
When the heat pump fails to operate, the backup heater and/or booster 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 heat load, and the booster heater in
the optional tank takes over the domestic hot water production.
▪
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 and/or booster heater can
take over the heat load or not.
Description
▪
2 Overlap: 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
<[5‑03] or T
a
The booster heater is only allowed to operate
when T
<[5‑03] if space heating priority is
a
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
<[5‑03].
a
▪
3 Compressor
off: 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.
▪
4 Legionella
operation
is
NOT
"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
<[5‑03] and [5‑02]=1. The
a
domestic hot water temperature can be
maximum the heat pump OFF temperature.
>35°C
a
only: Booster heater
allowed
except
for
EPRA14~18D + ETBH/X16E
Daikin Altherma 3 H HT W
4P644736-1D – 2023.10
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