CEMP-E
TI 810-11
30 November 1998
DECISION
OUTPUT
INPUT
MAKING
TT
TC
TEMPERATURE
CONTROLLER
VLV
(DECISION
(INPUT)
MAKING)
VALVE RESPONDS
TO CONTROLLER
NO
OUTPUT
Figure 2-7. Control loop.
NO FEEDBACK
OUTSIDE
THERMOSTAT
T
RADIATOR
RETURN
SUPPLY
ZONE VALVE
Figure 2-8. Open control loop.
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