CHAPTER 4 APPLIED OPERATION
4.4 Executing Heating and Cooling Control
JHeating and
cooling control
F Dead band
Output
Heating side
0
F Cooling
coefficient
4–10
Setting
Direct/reverse
Control Method
operation
standard control
Reverse operation
standard control
Direct operation
Heating and cooling
Reverse operation
control
Heating and cooling
Direct operation
control
Dead band:
dead band width = positive
Cooling side
Set point
Control output 1
Control output (heat)
Control output (cool)
Control output (heat)
Control output (cool)
Output
Heating side
PV
0
Set point
j jjj
Output
Control output 2
-
-
Control output (cool)
Control output (heat)
j jj
Overlap band:
dead band width = negative
Cooling side
PV