User manual

230V 400V
Step 5 15
Step +4 12
Step +5 15
3.1.10 Speed (rpm) control
A heat pump requires optimum conditions in the heating system in
order to be able to run as efficiently as possible. The temperature differ-
ence between the heating system’s supply line and return line must be
constant between 7–10°C. If the differences are greater or less, the heat
pump is less efficient and savings are lower.
The speed controlled circulation pump in DHP-AQ always ensures that the
temperature difference is retained. The control equipment detects if the
balance is upset and increases or decreases the speed of the circulation
pump as necessary.
User manual VUGFB102 – 11