Checking correct functioning

  1. Switch on unit and perform the following checks: D = detailed check, N = close inspection, S = visual inspection

Test schedule

D

N

S

I

Direction of rotation / air flow direction.

 

 

II

Ensure correct power consumption The rating current (rating plate) may be higher or lower depending on local conditions (duct distance, altitude, temperatures).

Imax may be exceeded at nominal voltage due to ageing or a reduction in terminal voltage (e.g. transformer).

 

 

III

Thermal safety is ensured by the PTC thermistor triggering system.