SystemAir VR 300 ECV/B - Unit Operation; Airflow and Temperature Control

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VR 300 ECV/B Operation and maintenance instructions
206788 (12-02-2010)
4 Systemair AB
GB
Operation
Airflow can alternatively be controlled from fan speed control with external 3-step speed regulator or from the
cooker hood.
Airflow (fan speed)
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.
Max (3) Forced ventilation. Is used when extra airflow is required.
Supply air temperature
Supply air temperature within normal range can be set from a switch inside the unit (Fig.1). Supply air
temperature to be increased/lowered by turning clockwise/anti-clockwise respectively. The temperature
setting is pre set from factory in the middle of “Min.” and “Max”.
Fig.1
When heat recovery from the extract air is insufficient to obtain set supply air temperature, an electrical
heater battery will automatically be switched on. (In general it is recommended to set supply air temperature
as low as possible, avoiding the feeling of draught. This gives the ultimate energy and ventilation efficiency).
"Summer operation"
When supply air temperature exceeds set temperature, the rotor will stop and there will be no heat recovery
(summer operation).