Assortment / System Description

Fan
-
Powered Box
Serial or parallel control strategy for the fan
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Y Output signal TR Room temperature
SpH Effective heating setpoint SpC Effective cooling setpoint
YH Heating valve YC Cooling valve
FanEndSpd
PrlH
Fan end speed for parallel
heating
FanEndSpd
PrlC
Fan end speed for parallel cooling
FanSpMinH Min. fan speed heating FanSpMinC Min. fan speed cooling
CoilVlVEnd
PrlH
Valve end position for parallel
heating
CoilVlVEnd
PrlC
Valve end position for parallel
cooling
CoilVlVSttP
rlH
Valve position start fan heating CoilVlVSttP
rlC
Valve position start fan cooling
Q Fan signal
Figure: Example of a parallel control strategy using a modulating fan
The control strategy can be configured on the fan powered box application for
the fan with the following parameters for the heating sequence.
Description Name Default value
Fan operation for cooling
0:Serial
1:Parallel
FanOp 1:Parallel
Fan operation for heating
0:Serial
1:Parallel
FanOp 1:Parallel
Parallel