Daikin Altherma EHVZ04S18DA6V, Руководство по установке для специалистов

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8 Configuration
Installer reference guide
51
ERGA04~08DAV3(A) + 08S18+23DA
Daikin Altherma – Low temperature split
4P495249-1 – 2017.12
User interface at
indoor unit
User interface used
as room thermostat at
main zone
External room
thermostat at
additional zone
When [C‑07]=1 (Ext RT control)
User interface at
indoor unit
External room
thermostat at main
zone
External room
thermostat at
additional zone
NOTICE
If an external room thermostat is used, the external room
thermostat will control the room frost protection. However,
the room frost protection is only possible if the leaving
water temperature control on the unit's user interface is
turned ON.
# Code Description
[2.A] [C‑05] External room thermostat type for the
main zone:
▪ 1: 1 contact: The used external room
thermostat can only send a thermo
ON/OFF condition. There is no
separation between heating or cooling
demand. The room thermostat is
connected to only 1 digital input
(X2M/35).
Select this value in case of a
connection to the heat pump convector
(FWXV).
▪ 2: 2 contacts: The used external room
thermostat can send a separate
heating/cooling
thermo ON/OFF
condition. The room thermostat is
connected to 2 digital inputs (X2M/35
and X2M/34).
Select this value in case of a
connection to the wired (EKRTWA) or
wireless (EKRTR1) room thermostat
Leaving water temperature: Delta T
The target delta T in heating for the main zone depends on the
emitter type for the main zone selected above. In heating, this
setting indicates the temperature difference between the leaving
water setpoint and entering water.
The unit is designed to support under floor loops operation. The
recommended leaving water temperature for under floor loops is
35°C. In such case, the unit will be controlled to realize a
temperature difference of 5°C which means that the unit entering
water temperature is around 30°C. Depending on the installed
application (radiators, heat pump convector, under floor loops) or
situation, it can be possible to change the difference between
entering and leaving water temperature. Note that the pump will
regulate its flow to keep the delta T. In some special cases, the
measured delta T can be different from the set value.
INFORMATION
When only the backup heater is active in heating, delta T
will be controlled according to the fixed capacity of the
backup heater. It is possible that this delta T is different
from the selected target delta T.
INFORMATION
In heating, the target delta T will only be achieved after
some operation time, when the setpoint is being reached,
because of the big difference between leaving water
temperature setpoint and inlet temperature at startup.
INFORMATION
If the main zone or the additional zone has a heating
demand, and this zone is equipped with radiators, then the
target delta T that the unit will use in heating operation will
be 10°C fixed.
If the zones are not equipped with radiators, then in
heating the unit will give priority to the target delta T for the
additional zone, if there is a heating demand in the
additional zone.
# Code Description
[2.B.1] [1‑0B] Delta T heating: A minimum temperature
difference is required for the good
operation of heat emitters in heating
mode.
▪ If [2-0C]=2, this is fixed to 10°C
▪ Else: 3°C~10°C
Leaving water temperature: Modulation
Only applicable in case of room thermostat control. When using the
room thermostat functionality, the customer needs to set the desired
room temperature. The unit will supply hot water to the heat emitters
and the room will be heated. Additionally, also the desired leaving
water temperature must be configured: when turning on the
modulation, the desired leaving water temperature will be calculated
automatically by the unit (based on the preset temperatures, if
weather-dependent is selected, modulation will be done based on
the desired weather-dependent temperatures); when turning off the
modulation, you can set the desired leaving water temperature on
the user interface. Moreover, with the modulation turned on, the
desired leaving water temperature is lowered or raised in function of
the desired room temperature and the difference between the actual
and the desired room temperature. This results in:
▪ stable room temperatures exactly matching the desired
temperature (higher comfort level)
▪ less on/off cycles (lower noise level, higher comfort and higher
efficiency)
▪ water temperatures as low as possible to match the desired
temperature (higher efficiency)