8 Configuration
Installer reference guide
62
EPGA11~ EAVH/9W
Daikin Altherma – Low temperature split
4P556070-1 – 2019.02
INFORMATION
If [4‑0A]=3 and emergency mode is active, the power
usage of the backup heater is maximal and equal to
2×[6‑03]+[6‑04].
INFORMATION
Only for systems with integrated domestic hot water tank: If
the storage temperature set point is higher than 50°C,
Daikin recommends NOT to disable the backup heater
second step because it will have a big impact on the
required time for the unit to heat up the domestic hot water
tank.
Capacity step 1
#
Code
Description
[9.3.4]
[6‑03]
▪ The capacity of the first step of the
backup heater at nominal voltage.
Additional capacity step 2
#
Code
Description
[9.3.5]
[6‑04]
▪ The capacity difference between the
second and first step of the backup
heater at nominal voltage. Nominal
value depends on backup heater
configuration.
Equilibrium
#
Code
Description
[9.3.6]
[5-00]
Equilibrium: Is backup heater operation
allowed above equilibrium temperature
during space heating operation?
▪ 1: NOT allowed
▪ 0: Allowed
[9.3.7]
[5-01]
Equilibrium temperature: Outdoor
temperature below which operation of
the backup heater is allowed.
Range: –15°C~35°C
INFORMATION
Above 10°C ambient temperature, the heat pump will
operate until 55°C. Configuring a higher setpoint with an
ambient temperature that is higher than the set equilibrium
temperature will prevent the backup heater from assisting.
The backup heater will ONLY assist if you increase the
equilibrium temperature [5‑01] to the required ambient
temperature you need to reach the higher setpoint.
Operation
#
Code
Description
[9.3.8]
[4‑00]
Backup heater operation:
▪ 0: Restricted
▪ 1: Allowed
▪ 2: Only DHW Enabled for domestic hot
water, disable for space heating
INFORMATION
Only for systems with integrated domestic hot water tank: If
backup heater operation during space heating needs to be
limited but can be allowed for domestic hot water
operation, then set [4‑00] to 2.
Emergency
Emergency
When the heat pump fails to operate, the backup 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 backup heater will automatically take over the heat
load and 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 backup 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 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.
For optimal operation and lowest power
consumption, it is strongly
recommended to keep the default
setting (
0
).
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: Used for
calculation of anti-recycling timer. If
[5‑02]=1, it defines the outdoor
temperature below which the backup
heater will assist during domestic hot
water heating.
[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].
Summary of Contents for Altherma EAVX-D9WG
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