5 Configuration
Installation manual
16
EHBH/X04+08DA
Daikin Altherma – Low temperature split
4P495266-1 – 2017.06
Configuration
The backup heater can be configured in different ways. It can be
chosen to have a 1-step only backup heater or a backup heater with
2 steps. If 2 steps, the capacity of the second step depends on this
setting. It can also be chosen to have a higher capacity of the
second step in emergency.
#
Code
Description
[9.3.3]
[4‑0A]
▪ 0: Relay 1
▪ 1: Relay 1 / Relay 1+2
(a)
▪ 2: Relay 1 / Relay 2
(a)
▪ 3: Relay 1 / Relay 2 Emergency Relay
1+2
(a)
(a)
Not available for 3V models.
INFORMATION
During normal operation, the capacity of the second step of
the backup heater at nominal voltage is equal to
[6‑03]+[6‑04].
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.
5.2.5
Configuration wizard: Main zone
The most important settings for the main leaving water zone can be
set here.
Emitter type
Depending on the system water volume and the heater emitter type
of the main zone, the heat up or cool down of the main zone can
take longer. This setting can compensate for a slow or a quick
heating/cooling system during the heat up/cool down cycle. The
target delta T for the main zone will depend on this setting.
In room thermostat control, this setting will influence the maximum
modulation of the desired leaving water temperature, and the
possibility for usage of the automatic cooling/heating changeover
based on the indoor ambient temperature.
Therefore it is important to set this correctly and in accordance with
your system layout.
#
Code
Description
[2.7]
[2‑0C]
▪ 0: Underfloor heating
▪ 1: Fancoil unit
▪ 2: Radiator
The setting of the emitter type has an influence on the space heating
setpoint range and the target delta T in heating as follows:
Description
Space heating
setpoint range
Target delta T in
heating
0: Underfloor heating Maximum 55°C
Variable
1: Fancoil unit
Maximum 55°C
Variable
2: Radiator
Maximum 65°C
Fixed 10°C
NOTICE
For radiators, the average emitter temperature will be
lower compared to underfloor heating, due to the fixed
delta T of 10°C. To compensate, you can:
▪ Increase the weather dependent curve desired
temperatures [2.5].
▪ Enable leaving water temperature modulation and
increase the maximum modulation [2.C].
Control
In Leaving water control, unit operation is decided based on the
leaving water temperature regardless the actual room temperature
and/or heating or cooling demand of the room.
In External room thermostat control, unit operation is decided by the
external thermostat or equivalent (e.g. heat pump convector).
In Room thermostat control, unit operation is decided based on the
ambient temperature of the user interface used as a room
thermostat.
#
Code
Description
[2.9]
[C‑07]
▪ 0: Leaving water
▪ 1: External room thermostat
▪ 2: Room thermostat
Setpoint mode
In Fixed mode, the desired leaving water temperature does NOT
depend on the outdoor ambient temperature.
In WD heating, fixed cooling mode, the desired leaving water
temperature:
▪ depends on the outdoor ambient temperature for heating
▪ does NOT depend on the outdoor ambient temperature for cooling
In Weather dependent mode, the desired leaving water temperature
depends on the outdoor ambient temperature.
#
Code
Description
[2.4]
N/A
▪ 0: Fixed
▪ 1: WD heating, fixed cooling
▪ 2: Weather dependent
If you choose WD heating, fixed cooling or Weather dependent, the
next screen will be the detailed screen with weather-dependent
curves. Also see
"5.2.7 Detailed screen with weather-dependent
curve" on page 17
.
Schedule
Indicates if the desired leaving water temperature is according to a
schedule. Influence of the LWT setpoint mode [2.4] is as follows:
▪ In Fixed LWT setpoint mode, the scheduled actions consist of
desired leaving water temperatures, either preset or custom.
