Record the following information on the commissioning sheet.
• Fan motor size
• Drive type
• Is the rotation correct
• Motor currents (L1, L2 and L3)
• Fan speed
• Overload settings
• Phase voltage
As standard the air flow fail switch is set for the fans to operate at the standard design
airflow and external static.
However in instances where the operating conditions are to be varied from the standard
then the following procedure to set up the switch(s) must be followed:
1 Set airflow to required airflow (dehumidification mode) with the use of
microprocessor.
2 Open only doors to the control panel section ensure blanking plate is in place.
3 Turn air flow switch to maximum setting causing failure at the design air flow
4 Adjust switch downwards until the control circuit is reactivated.
5 Switch off fan(s), input to the controller should switch off.
6 Turn on fan and reset unit.
Ensure that the filter change switch is operating. Check that at reduced air volume
(dehumidification) the filter alarm does not cause nuisance alarms.
If the air flow failure switch is not set up in dehumidification mode (reduced air volume)
nuisance alarms can be generated.
Commissioning
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