Comfort Stat CDT901 - Manual (Page 95)

CDT900 Series Touchscreen Programmable Thermostata
Table 9. Sequence of Operation for Conventional Systems.
System Setting Fan Setting Call for Action Energize Terminals Screen Message
Off Auto None None None
Cool Auto None None None
Cool or Auto Auto Stage 1 Cooling Y, G Cool On
Cool or Auto Auto Stage 1 and Stage 2
Cooling
Y, Y2b, G Cool On
Heat Auto None None None
Heat or Auto Auto Stage 1 Heating W, Ga Heat On
Heat or Auto Auto Stage 1 and Stage 2
Heating
W, W2c, Ga Heat On
a
G energizes only if Installer Setup number 0180 is set to Electric.
b
If Installer Setup System type is set to two stages of cooling.
c
If Installer Setup System type is set to two stages of heating.
Table 10. Sequence of Operation for Power Open and Power Closed Valves or Normal
Open Valves.
System Setting Fan Setting Call for Action Energize Terminals Screen Message
Off Auto None None None
Heat N/A None Y None
Heat N/A Heat W Heat
On
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