8 Configuration
Installer reference guide
67
ERGA04~08DAV3(A) + 08S23DAV
Daikin Altherma – Low temperature split
4P499573-1A – 2018.11
#
Code
Description
[9.4.4]
[4-03]
▪ 0: Anti-legionella 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 anti-legionella 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: Anti-legionella heater operation is
allowed when required.
[9.4.4]
[4-03]
▪ 2: The anti-legionella heater is allowed
outside the operation range of the heat
pump
for
domestic
hot
water
operation.
Anti-legionella heater operation is only
allowed if:
▪ Ambient temperature is out of the
operating
range:
T
a
<[5‑03]
or
T
a
>35°C
The anti-legionella 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 anti-legionella
heater will be restricted even when
T
a
<[5‑03].
9.4.4
[4-03]
▪ 3: The anti-legionella 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 anti-legionella heater
operation is not allowed.
9.4.4
[4-03]
▪ 4: Anti-legionella 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 anti-legionella 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 optional backup heater and
anti-legionella heater can serve as an emergency heater and either
automatically or non-automatically take over the heat load.
▪ When auto emergency is set to Automatic and a heat pump failure
occurs, the optional backup heater will automatically take over the
heat load, and the anti-legionella heater will automatically take
over the domestic hot water production.
▪ When auto emergency is set to Manual and a heat pump failure
occurs, the domestic hot water and space heating operation will
stop and need to be recovered manually via the user interface. To
recover operation manually, go to the Malfunctioning main menu
screen, where the user interface will then ask you to confirm
whether the optional backup heater or anti-legionella heater can
take over the heat load or not.
We recommend to set Emergency to Automatic if the house is
unattended for longer periods.
#
Code
Description
[9.5]
N/A
▪ 0: Manual
▪ 1: Automatic
INFORMATION
The auto emergency setting can be set in the menu
structure of the user interface only.
INFORMATION
If [4‑03]=1 or 3, then Emergency=Manual is not applicable
for the anti-legionella heater.
INFORMATION
If a heat pump failure occurs and Emergency is set to
Manual, the room frost protection function, the underfloor
heating screed dryout function, and the water pipe
antifreeze function will remain active even if the user does
NOT confirm emergency operation.
Balancing
Priorities
For systems with an integrated domestic hot water tank
#
Code
Description
[9.6.1]
[5‑02]
Space heating priority: Defines whether
backup heater (if applicable) will assist
the heat pump during domestic hot
water operation.
Enable this function to shorten tank
heating operation time and interruption
of the space heating cycle.
This setting MUST always be 1.
[5‑01] Equilibrium temperature and
[5‑03] Space heating priority
temperature are related to backup
heater (if applicable). So, you must set
[5‑03] equal or a few degrees higher
than [5‑01].
If the backup heater operation is limited
([4‑00]=0) and the outdoor temperature
is lower than setting [5‑03], the
domestic hot water will not be heated
with the optional backup heater.
[9.6.2]
[5‑03]
Priority temperature: Defines the
outdoor temperature which below the
domestic hot water will be heated by
anti-legionella heater only.
Range: –15°C~35°C
