Daikin VRV IV HXY080A8V1B Installation And Operation Manual page 22

T
A
21°C
B 18°C
[2-01]
A Normal room temperature set point
B Room setback temperature [5-03]
t Time
T Temperature
T
A
45°C
5°C [5-02]
B 40°C
[2-01]
A Normal leaving water temperature set point
B Leaving water setback temperature =A–[5-02]
t Time
T Temperature
Refer to "[5] Automatic setback" on page 20
points.
[3] Weather dependent set point (Heating)
When weather dependent operation is active, the leaving water
temperature is determined automatically depending on the outdoor
temperature: colder outdoor temperatures will result in warmer water
and vice versa. The unit has a floating set point. Activating this
operation will result in a lower power consumption than use with a
manually fixed leaving water set point.
During weather dependent operation, the user has the possibility to
shift up or down the target water temperature by a maximum of 5°C.
This "Shift value" is the temperature difference between the
temperature set point calculated by the controller and the real set
point. E.g. a positive shift value means that the real temperature set
point will be higher than the calculated set point.
It is advised to use the weather dependent set point because it
adjusts the water temperature to the actual needs for space heating.
It will prevent the unit from switching too much between thermo ON
operation and thermo OFF operation when using the user interface
room thermostat or external room thermostat.
T
t
Lo_Ti
Hi_Ti
Lo_A
T Target water temperature
t
T Ambient (outdoor) temperature
A
Shift value = Shift value
[3-00] Low ambient

temperature.
[3-01] High ambient

temperature.
Installation and operation manual
20
t
[2-02]
[2-02]
for temperature set
+ 05
00 Shift value
– 05
Hi_A T
A
temperature (Lo_A): low
temperature (Hi_A): high
[3-02] Set point at low ambient temperature (Lo_Ti): the target

outgoing water temperature when the outdoor temperature
equals or drops below the low ambient temperature (Lo_A).
Note that the Lo_Ti value should be higher than Hi_Ti, as for
colder outdoor temperatures (i.e. Lo_A) warmer water is
required.
 [3-03] Set point at high ambient temperature (Hi_Ti): the target
outgoing water temperature when the outdoor temperature
equals or rises above the high ambient temperature (Hi_A).
Note that the Hi_Ti value should be lower than Lo_Ti, as for
warmer outdoor temperatures (i.e. Hi_A) less warm water
suffices.
INFORMATION
If by mistake the value of [3-03] is set higher than the value
of [3-02], the value of [3-03] will always be used.
[4] Settings are not applicable
[5] Automatic setback
[5-00] Setting is not applicable.

[5-01] Setting is not applicable.

[5-02] Leaving water setback temperature.

t
[5-03] Room setback temperature.

[5-04] Setting is not applicable.

[6] Option setup
[6-01] External room thermostat.

If the optional external room thermostat is installed, its operation
must be enabled by field setting. Default [6-01]=0, which means
no external room thermostat is installed.
 Set [6-01]=2 if the optional external room thermostat is
installed. The external room thermostat only gives an
ON/OFF signal to the heat pump based on the room
temperature.
 Set [6-01]=1 in case a heating thermostat ON or cooling
thermostat ON function is required (when using optional
EKRTWA or EKRT1). The processing of thermostat ON will
depend on the system's operation mode. Room thermostat
input 1 = heating input, room thermostat input 2 = cooling
input.
Because the external room thermostat does not give continuous
feedback information to the heat pump, it is supplementary to
the user interface room thermostat function. To have a good
control of the system and avoiding frequent ON/OFF it is
advised to use the automatic weather dependent set point
operation.
Room thermostat input 1 = operation ON (1)/OFF (0).
Room thermostat input 2 = operation ON (1)/OFF (0).
See "14.2. Wiring diagram" on page 41
The operation mode of the unit is subject in the master VRV DX
indoor remote controller.
[6-02] Heater kit option.

To activate the heater kit as an option of the HXY(080/125) heat
pump, change field setting [6-02]=1 (default value is "0").
From that moment on, the heat pump system will take the heater
kit into account whilst deciding operation. When the heater is
actually operating, the heater symbol is shown on the remote
controller of the hydrobox. Refer to
EKBUHAA(6V3/6W1) heater kit" on page
[6-03] Setting is not applicable.

[8] Option setup
[8-00] User interface temperature control.

 [8-00]=0 the unit operates in leaving water temperature
control. This is the default setting.
 [8-00]=1 the unit operates in room temperature control. This
outdoor
means that the user interface is used as room thermostat, so
the user interface can be placed in the living room to control
the room temperature.
outdoor
[8-01] Setting is not applicable.

for connection details.
"9. Installing the optional
26.
HXY080+125A8V1B
VRV IV System indoor unit
4P405267-1B – 2016.02