Manual code 75803707A.0708
Page 43 of 64
8.2.3 CONTROL OF AIR FLOW RATE ACCORDING TO COOLING CAPACITY
The pCO controls the fans so as to modulate the air flow rate in accordance with the cooling capacity requested
by the system. This can make for significant energy savings and a reduction in noise levels, particularly when operating
with partial loads.
The minimum and maximum speed limits applied are defined by Tecnair LV according to the type of unit and
thus the fan model installed. The minimum speed will in any case never be below 30%.
This solution can be applied on chilled water coil machines. On direct expansion machines, it is only suitable
with modulating control of cooling capacity.
Example speed control from 50% to 100%
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