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Figure 19 Three-stage heating
0%
Heating
65 70
Heat 3
On
½ Dead-
band
66 67 68 69
Heat 2
On
Heat 1
On
Heat 3
Off
Heat 2
Off
Heat 1
Off
-100%
Heating
½ Proportional Band
Decreasing Temperature
Temp Setpoint: 70°F
Proportional Band: 8°F
Deadband: 2°F