Assortment / System Description

Fan coil application
Serial or parallel control strategy
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Y Output signal TR Room temperature
SpH Effective heating setpoint SpC Effective cooling setpoint
YH Heating valve YC Cooling valve
FanSpMax
H
Max. fan speed heating FanSpMaxC Max. fan speed cooling
FanSpMinH Min. fan speed heating FanSpMinC Min. fan speed cooling
OfsFanSttH Offset for fan start heating OfsFanSttC Offset for fan start cooling
Q Fan signal
Figure: Example of a serial control strategy using a modulating fan
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
Serial
Parallel