Daikin Altherma EHVH04S23DAV - Page 68

8 Configuration
Installer reference guide
68
ERGA04~08DAV3(A) + EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499573-1 – 2017.12
# Code Description
[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
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.
Emergency
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 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. 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 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
[9.6.3] [5-04] Offset BSH setpoint: Set point
correction for domestic hot water
temperature: set point correction for the
desired domestic hot water
temperature, to be applied at low
outdoor temperature when space
heating priority is enabled. The
corrected (higher) set point will make
sure that the total heat capacity of the
water in the tank remains
approximately unchanged, by
compensating for the colder bottom
water layer of the tank (because the
heat exchanger coil is not operational)
with a warmer top layer.
Range: 0°C~20°C
Final English - Tanslations in progress