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 dif‐
ference 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 Atec 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 circu‐
lation pump as necessary.
User manual 086L0130 Rev. 1 EN – 11
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