Daikin EHBX08DA9W - Page 57

8 Configuration
Installer reference guide
57
ERGA04~08DAV3(A) + EHBH/X04+08DA
Daikin Altherma – Low temperature split
4P496758-1 – 2017.12
INFORMATION
When leaving water temperature modulation is enabled,
the weather‑dependent curve needs to be set to a higher
position than [8-06] plus the minimum leaving water
temperature setpoint required to reach a stable condition
on the comfort setpoint for the room. To increase
efficiency, modulation can lower the leaving water setpoint.
By setting the weather‑dependent curve to a higher
position, it cannot drop below the minimum setpoint. Refer
to the illustration below.
a
+[8-06]
−[8-06]
b
T
a
T
t
a Weather-dependent curve
b Minimum leaving water temperature setpoint required to
reach a stable condition on the comfort setpoint for the
room.
Shut off valve
The following is only applicable in case of 2 leaving water
temperature zones. In case of 1 leaving water temperature zone,
connect the shut-off valve to the heating/cooling output.
The shut off valve for the main leaving water temperature zone can
close under these circumstances:
INFORMATION
During defrost operation, the shut-off valve is ALWAYS
opened.
During thermo: If [F‑0B] is enabled, the shut off valve closes when
there is no heating demand from the main zone. Enable this setting
to:
▪ avoid leaving water supply to the heat emitters in the main LWT
zone (through the mixing valve station) when there is request from
the additional LWT zone.
▪ activate the ON/OFF pump of the mixing valve station ONLY when
there is demand.
# Code Description
[2.D.1] [F-0B] The shut off valve:
▪ 0 No: is NOT influenced by heating or
cooling demand.
▪ 1 Yes: closes when there is NO
heating or cooling demand.
INFORMATION
The setting [F‑0B] is only valid when there is a thermostat
or external room thermostat request setting (NOT in case
of leaving water temperature setting).
During cooling: If [F‑0B] is enabled, the shut off valve closes when
the unit is running in cooling operation mode. Enable this setting to
avoid cold leaving water through the heat emitter and the forming of
condensation (e.g. under floor heating loops or radiators).
# Code Description
[2.D.2] [F-0C] The shut off valve:
▪ 0 No: is NOT influenced by changing
the space operation mode to cooling.
▪ 1 Yes: closes when the space
operation mode is cooling.
8.4.4 Additional zone
Setpoint screen
You can set the leaving water temperature for the additional zone
using the setpoint screen. For more information about how to do this,
see "8.3.5Setpoint screen"on page49.
Schedule
Indicates if the desired leaving water temperature is according to a
schedule. Also see "8.4.3Main zone"on page53.
# Code Description
[3.1] N/A Schedule
▪ 0: No
▪ 1: Yes
Heating schedule
You can set the additional zone heating temperature schedule using
the schedule screen. For more information about this screen, see
"8.3.8Schedule screen: Example"on page50.
Cooling schedule
You can set the additional zone cooling temperature using the
schedule screen. For more information about this screen, see
"8.3.8Schedule screen: Example"on page50.
Setpoint mode
The setpoint mode of the additional zone can be independently set
from the setpoint mode of the main zone, see " Main zone" on
page53.
# Code Description
[3.4] N/A Setpoint mode
▪ 0: Fixed
▪ 1: WD heating, fixed cooling
▪ 2: Weather dependent
Heating WD curve
Set weather-dependent heating for the additional zone (if [3.4] = 1 or
2):
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