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VR 250 ECH/B
Operation and maintenance instructions
206610 (16-11-2010)
4
Systemair
AB
GB
Operation
Signal
airflow
Switches airflow
Signal supply air temperature
Switches supply air temperature
Signal filter change
Signal summer operation
Reset of operation time after filter change
Signal heater battery ON
Fig. 2
The unit is controlled from a separate controller, with the following functions:
Airflow (Fan speed)
Buttons to increase or decrease airflow in 3 steps (4) and (5)
(fig.2)
. Lamp signals (1), (2) and (3) show
set airflow.
Min(1)
Minimum ventilation.
To be used during holidays or when the building is not in use.
Norm(2)
Normal ventilation adapted to the building.
Airflow for normal ventilation can be chosen by means of a potentiometer on the main print
card (see installation instructions-Commissioning).
Max(3)
Forced ventilation.
Is used when extra airflow is required.
