Operating mode: Here you set whether the brine pump
is to be regulated automatically, manually or with fixed
delta.
Fixed delta: Here you set whether the brine pump will
be controlled with fixed delta, e.g. for ground water
systems.
Manual: If you have opted to control the brine pump
manually, you set the desired pump speed here.
Speed during active cooling: Here, you set the speed at
which the brine pump is to operate during active cooling.
Speed in passive cooling: Here you set the speed at
which the brine pump is to operate during passive
cooling.
Speed in standby mode, cooling: Here, you set the
speed at which the brine pump is to operate in standby
mode when passive cooling is permitted.
Speed in standby mode: The speed the brine pump is
to have in standby mode is set here. Standby mode oc-
curs when active cooling is permitted at the same time
as there is no need for compressor operation.
MENU 7.1.7 - COOLING
Heating/cooling sensor
Alternative: Which sensors can be selected differs
depending on the installation.
Set point value, heating/cooling sensor
Setting range: 5 – 40 °C
Heating at room sub temp
Setting range: 0,5 – 10,0 °C
Cooling at room over temp
Setting range: 0,5 – 10,0 °C
Stepping diff compressor
Setting range: 10 – 150
Max. compressors in active cooling
Setting range: 0 – 18
Shunt amplification for cooling dump
Setting range: 0,1 – 10,0
Shunt amplification for heat dump
Setting range: 0,1 – 10,0
Shunt waiting time for cooling dump (QN41)
Setting range QN41: 10 – 300 s
Shunt waiting time for heat dump (QN41)
Setting range QN41: 10 – 300 s
You can use the heat pump to cool the building during
the warm part of the year.
Caution
When heating/cooling sensors BT74) have been
connected and activated in menu 7.4, no other
sensor can be selected.
Heating/cooling sensor
An extra temperature sensor can be connected to the
installation in order to determine when it is time to
switch between heating and cooling operation.
When several heating/cooling sensors have been in-
stalled, you can select which sensor should be in control.
If BT74 is installed, this is always in control and no set-
ting can be made.
Set point value, heating/cooling sensor
Here, you can set the indoor temperature at which the
installation is to shift between heating and cooling oper-
ation.
Heating at room sub temp
Here, you can set how far the room temperature can
drop below the desired temperature before the installa-
tion switches to heating operation.
Cooling at room over temp
Here, you can set how high the room temperature can
increase above the desired temperature before the in-
stallation switches to cooling operation.
Stepping diff compressor
The degree minute difference for controlling when the
next compressor is to start is set here.
Max. compressors in active cooling
Set the max number of compressors that may be used
for cooling in those cases where several compressors
are available here.
Shunt amplification and Shunt waiting time
Caution
This setting option only appears if passive
cooling is activated in menu 7.2.1.
Shunt reinforcement and shunt wait time for the cooling
system are set here.
MENU 7.1.10.2 - AUTO MODE SETTINGS
Start cooling
Setting range: -20 – 40°C
You can also select start temperature for cooling.
When the operating mode is set to "Auto", the installa-
tion selects when start and stop of additional heat and
cooling/heat production are permitted, depending on
the average outdoor temperature. You can also select
start temperature for cooling.
27ACS 45 | GB
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