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United Facilities Criteria CD 1
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> Figure 2-9. Closed control loop.
Figure 2-7. Control loop.
Figure 2-10. Two loops controlling one device (humidity control with high limit).
Heating, Ventilating, and Air Conditioning (HVAC) Control Systems - index
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CEMP-E
TI
810-11
30
November
1998
TT
TRANSMITTER
TEMPERATURE-SENSING
ELEMENT
H
AIR
FLOW
AIR
FLOW
C
HWR
TC
CONTROLLER
HWS
NO
COIL
VALVE
Figure
2-9.
Closed
control
loop.