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Speed control
setpoint
The preferred mode setting for the condenser pump is Temperature difference. The temperature
difference should be set to 5...15 °C (depending on the heating system). During domestic water heating,
the pump runs in Constant speed mode at 100% speed.
Low limit
High limit
Control
Operation on
standby
Measurement
Mode for heating:
operating mode
selection for space
heating
Speed control
setpoint for heating
Control low limit for
heating
Control high limit for
heating
M8004 2308EN
Device settings → Service → Pump → Brine pump
Constant speed
The brine pump runs at a constant speed determined by the Speed control
setpoint.
Always on
The brine circuit pump will always run at a constant speed (determined by the Speed
control setpoint) regardless of the Operation on standby setting.
This speed setting is shared between all brine circuit pump operating modes.
However, the unit and number value used for the setting depends on the operating
mode.
● If you change the operating mode, this value will also change.
Device settings → Service → Pump → Condenser pump
Current low limit for the control value.
Current high limit for the control value.
The current speed control value for the condenser pump.
Stop
The condenser pump will continue to run only as long as the compressor is
on. When the compressor or the electric heater is on, the type of control will be
determined by the current operating mode.
Idle
The condenser pump will continue to run after the compressor has stopped at a
speed corresponding to the Control low limit for space heating.
Specifies which measurement will be used for adjusting the pump (depending on
the pump's operating mode). Examples include the brine circuit's temperature
difference or the brine circuit flow (or brine circuit return) temperature, depending on
the operating mode.
Pump not in use
The pump will not be used in space heating.
Outlet temperature
The system adjusts the speed of the condenser pump to keep flow temperature at
the level determined by the Speed control setpoint.
Temperature difference
The system adjusts the speed of the condenser pump to keep the difference
between the condenser circuit inlet and outlet temperature at the level determined
by the Speed control setpoint.
● Typical Speed control setpoint setting: 5...15 °C
Constant speed
The condenser pump runs at a constant speed (at the speed determined by the
Speed control setpoint).
● Set the Speed control setpoint so that the temperature difference at the start of
the heating season is approximately 5 °C when the heat pump is on.
Always on
The condenser pump will always run at a constant speed (at the speed determined
by the Speed control setpoint) regardless of the Operation on standby setting.
● Set the Speed control setpoint so that the temperature difference at the start of
the heating season is approximately 5 °C when the heat pump is on.
This speed setting is shared between all condenser pump operating modes. The
unit and number value used for the setting depends on the operating mode. If you
change the operating mode, this value will also change.
The minimum speed for the condenser pump.
● Typical setting: 30% or higher
The maximum speed for the condenser pump. Usually, the value should be set to
100%. If a high flow rate causes noise in the pipes, reduce the noise by lowering this
setting.
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