Daikin ERGA08DAV3 Installer's Reference Manual page 53

NOTICE
▪ When adjusting the leaving water temperature ranges,
all desired leaving water temperatures are also
adjusted to guarantee they are between the limits.
▪ Always balance between the desired leaving water
temperature with the desired room temperature and/or
the capacity (according to the design and selection of
the heat emitters).
temperature is the result of several settings (preset
values, shift values, weather dependent curves,
modulation). As a result, too high or too low leaving
water temperatures could occur which lead to
overtemperatures or capacity shortage. By limiting the
leaving water temperature range to adequate values
(depending on the heat emitter), such situations can be
avoided.
Example: Set the minimum leaving water temperature to 28°C to
avoid NOT to be able to heat up the room: leaving water
temperatures MUST be sufficiently
temperatures (in heating).
# Code
Leaving water temperature range for the main leaving water
temperature zone (= the leaving water temperature zone with the
lowest leaving water temperature in heating operation)
[2.8.1] [9-01] Heating minimum 15°C~37°C
[2.8.2] [9-00] Heating maximum
▪ [2‑0C]=2 (emitter type main zone =
radiator)
37°C~65°C
▪ Otherwise: 37°C~55°C
Control
Defines how the operation of the unit is controlled. There are 3
possibilities:
Control
Leaving water Unit operation is decided based on the leaving
water temperature regardless the actual room
temperature and/or heating demand of the
room.
External room Unit operation is decided by the external
thermostat or equivalent (e.g. heat pump
thermostat
convector).
Room thermostat Unit operation is decided based on the ambient
temperature of the user interface used as a
room thermostat.
# Code
[2.9] [C‑07] ▪ 0: Leaving water
▪ 1: External room thermostat
▪ 2: Room thermostat
Thermostat type
Only applicable in external room thermostat control.
Following combinations are possible to control the unit (not
applicable when [C‑07]=0):
When [C‑07]=2 (RT control)
ERGA04~08DAV3(A) + EHVZ04+08S18+23DA +
EHVZ04+08S18+23DJ
Daikin Altherma 3 R F
4P495249-1B – 2019.06
The desired leaving water
higher than the room
Description
In this control...
Description
User interface at User interface used
indoor unit as room thermostat at
main zone
When [C‑07]=1 (Ext RT control)
User interface at External room
indoor unit thermostat at main
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 [C.2] Space
heating/cooling is turned ON.
# Code
[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
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
room thermostat can send a separate
heating/cooling
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 underfloor loops operation. The
recommended leaving water temperature for underfloor 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, underfloor loops) or
situation, it can be possible to change the difference between
8 Configuration
External room
thermostat at
additional zone
External room
thermostat at
zone additional zone
Description
condition. There is
contacts: The used external
thermo ON/OFF
Installer reference guide
no
53