EKHBRD011~Y1
Indoor unit for air to water heat pump system and options
4P402192-1A – 2015.04
Operation manual
6
Selecting weather dependent set point operation
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 remote
controller room thermostat or external room thermostat.
1
Press the
button 1 time to select weather dependent set
point operation (or 2 times when the remote controller room
thermostat function is used).
Icon
appears on the display as well as the shift value. The
shift value is not shown in case it is 0.
2
Use the
and
buttons to set the shift value.
Range for the shift value: –5°C to +5°C
Icon
will be displayed as long as the weather dependent set
point operation is enabled.
3
Press the
button to deactivate weather dependent set point
operation.
The
and
buttons are used to set the leaving
water temperature.
Field settings define the parameters for the weather dependent
operation of the unit. Refer to the chapter
"Field settings" on page 16
for a detailed description how to set one or more field settings.
■
[3-00] Low ambient temperature (Lo_A): low outdoor
temperature.
■
[3-01] High ambient temperature (Hi_A): high outdoor
temperature.
■
[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.
Automatic setback function
Setback function provides the possibility to lower the room
temperature. The setback function can for instance be activated
during the night because the temperature demands during night and
day are not the same.
The setback function is configured through field settings. Refer to the
chapter
"Field settings" on page 16
for a detailed description how to
set one or more field settings.
■
[2-00] Status: defines whether the setback function is turned ON
(1) or OFF (0)
■
[2-01] Start time: time at which setback is started
■
[2-02] Stop time: time at which setback is stopped
■
[5-02] Leaving water setback temperature (temperature drop)
NOTE
During this operation, instead of showing the water
temperature set point, the controller shows the shift
value which can be set by the user.
T
t
Target water temperature
T
A
Ambient (outdoor) temperature
= Shift value
Lo_Ti
Lo_A
Hi_A
T
A
T
t
+ 05
00
– 05
Hi_Ti
Shift value
NOTE
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.
NOTE
■
Remark that the icon will be flashing during
setback operation.
■
By default the setback function is enabled.
■
The setback function can be combined with the
automatic weather dependent set point operation.
■
Setback function is an automatic daily scheduled
function.
A
Normal leaving water temperature set point
B
Leaving water temperature, including the leaving water setback
temperature
t
Time
T
Temperature
[2-01]
[2-02]
B
A
T
t
65
°
C
60
°
C
5
°
C [5-02]
