Additional heating, space heating
Power increase
delay
Whe the first power stage is activated, the
Power increase delay
takes effect. After
the delay, the next power stage will switch on.
●
Typical setting: 40–120
● Increase the delay to move forward the point at which the next power stages will
be switched on to provide supplementary heating (for the compressor and the
first stage).
The delay is based on degree minutes, and it applies when the compressor is
running, the electric heater’s first power stage is active, and the flow temperature is
below its setpoint. Once the measured temperature is above the setpoint, the delay
will be reset.
● Delay calculation: flow setpoint – measured flow temperature.
Power decrease
delay
The stages are switched off one by one, with the Power decrease delay in between.
The stage that was switched on last will be switched off first.
●
Typical setting: 0–2
● Decrease the delay to have the power stages switch off earlier after the flow
temperature exceeds its setpoint.
● If the delay is greater than 0, the heater power stages will remain switched on
even after the flow temperature has exceeded the setpoint.
● For a more stable flow temperature, use a setting slightly above zero.
The delay is based on degree minutes, and it applies when the compressor is
running, the electric heater is active, and the flow temperature is above its setpoint.
Once the measured temperature is below the setpoint, the delay will be reset.
● Delay calculation: flow setpoint – measured flow temperature.
Freezing protection only
The electric heater will be switched on only when heating water temperature falls
below +5 °C. The freezing protection function monitors the temperature in the
condenser, buffer tank, and the heating circuits. Once the temperature exceeds
+10 °C, the electric heater will be switched off. In freezing protection, space heating
has priority over domestic hot water heating.
●
If this option is selected, the electric heater won’t be switched on during a
fault unless the temperature falls below the Freezing protection limit.
Backup use only
The electric heater will be switched on if:
1. The outdoor temperature is below +5 °C (freezing protection).
2. An alarm prevents the compressor from starting (backup operation).
In backup use, space heating has priority over domestic hot water heating. Select
this option, if the fuse for the heat pump power supply is not rated for running the
compressor and the electric heater in parallel.
Mode for heating:
operating mode
selection for space
heating
With compressor (parallel operation)
The electric heater will be switched on if:
1. The outdoor temperature is below +5 °C (freezing protection).
2. An alarm prevents the compressor from starting (backup operation).
3. The target temperature for flow water from the heat pump has not been
reached, and the start delay for the electric heater has elapsed.
Select this option, if the fuse for the heat pump power supply is rated for running the
compressor and the electric heater in parallel.
40 (59)
M8006 2314EN
