Daikin Altherma 3 H MT W, Installer'S Reference Manual

Page: 199 / 296

10 | Configuration
Installer reference guide
199
EPRA08~W1 + ETBH/9W
Daikin Altherma 3 H MT W
4P634885-1 – 2021.03
# Code Description
[9.4.4] [4-03] ▪ 0 Restricted : Booster heater operation is
NOT allowed except for "Disinfection function"
and "Powerful domestic water heating".
Only use this in case the heat pump capacity
can cover the heating requirements of the
house and domestic hot water during 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.
[9.4.4] [4-03] ▪ 1 Allowed : Booster heater operation is
allowed when required.
[9.4.4] [4-03] ▪ 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
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 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.
9.4.4 [4-03] ▪ 4 Legionella only : 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.