Device settings → Service → Hot water → Additional heating
After compressor
The electric heater will switch on if:
1. DHW tank temperature is below +5 °C (freezing protection).
2. An alarm prevents the compressor from starting (backup operation).
3. The target temperature for the DHW tank is not reached, and the compressor
reaches its operating limits and switches off.
There is a short delay between switching off the compressor and switching on the
heater.
Select this option, if the fuse for the heat pump power supply is not to run both the
compressor and the heater at the same time.
With compressor (parallel operation)
The electric heater will switch on if:
1. DHW tank temperature is below +5 °C (freezing protection).
2. An alarm prevents the compressor from starting (backup operation).
3. The target temperature for the DHW tank is not reached, and the compressor
reaches its operating limits and switches off.
4. The target temperature for the DHW tank has not been reached, and the start
delay for the electric heater has elapsed.
There is a short delay between switching off the compressor and switching on the
heater.
Select this option, if the fuse for the heat pump power supply is rated to run both the
compressor and the heater at the same time.
Nominal output of
power stages
The rated output for the power stages in the condenser circuit’s in-line heater.
There can be three power stages. The value is used for assessing electrical power
consumption and for functions that restrict the heat pump’s electrical current.
4.7 Pump settings
Device settings → Service → Pump → Brine pump
Usually, it is advisable to set heat source pump in the
Constant speed
mode, and its speed should be set
to 100%.
Control low limit
The minimum speed for the brine circuit pump.
●
Typical setting: 50% or higher
Control high limit
The maximum speed for the brine circuit pump.
●
Typical setting: 100%.
Control
The current speed control setting for the brine circuit pump.
Stop
The brine pump will continue to run only as long as the compressor is on. When the
compressor is on, the operating mode determines how the pump is controlled.
Operation on
standby
Idle
The brine pump will continue to run after the compressor has stopped at a speed
corresponding to the
Control low limit
setting.
Measurement
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.
Pump not in use
There is no brine circuit pump connected to the heat pump.
Outlet temperature
The system will control the speed of the brine circuit pump to keep the return line
temperature at a level determined by the
Speed control setpoint
.
●
Typical speed control setpoint: –3 °C
Operating mode
Temperature difference
The system will control the speed of the brine circuit pump to keep the difference
between the brine circuit flow and return temperature at the level determined by the
Speed control setpoint
.
●
Typical speed control setpoint: 2–4 °C
28 (49)
M8004 2308EN
