Filter
Top Products
iCOM
Controls Training and Service Manual
The example below is based on a temperature set point of 70°F with a control
band length of 4°F, which is ½ of the programmed temperature proportional band
value.
STAGE TEMPERATURE
Cool 1 ON
Set point plus 1°F
Cool 2 ON
Set point plus 2°F
Cool 3 ON
Set point plus 3°F
Cool 4 ON
Set point plus 4°F
Cool 4 OFF
Set point plus 3°F
Cool 3 OFF
Set point plus 2°F
Cool 2 OFF
Set point plus 1°F
Cool 1 OFF Set point
4 Stage Compressorized Cooling – With Dead Band
Temp Set Point: 70°F
Proportional Band: 8°F
Dead Band: 2°F
70 71 72 73 74 75
Increasin
g
Temperature
Cool 2 On
Cool 1 Off
Cool 4 On
Cool 3 Off
Temp Set Point + (1/2 Dead Band + 1/2 Proportional Band)
DB
Cool 1 On Cool 3 On
Cool 4 Off
Cool 2 Off
Note: in the above example that the control band begins at the 70°F temperature
set point and has a length of 5°F, which is ½ of the programmed temperature dead
band value plus ½ of the programmed temperature proportional band value.
16