25
T2GY INSTALLER’S GUIDE
Heating
Cooling
Hot Water
Mode
STG1
STG2
STG3
EMERG
STG1
STG2
Compressor
On
On
On
Off
On
On
Stg 2 On
Reversing Valve
Off
Off
Off
Off
On
On
Off
Loop Pump
On
On
On
Off
On
On
On
Load Pump
Off
Off
Off
Off
Off
Off
On
Aux Heater
Off
Off
Staged
Staged
Off
Off
Off
Acc Relay
On
On
On
Off
On
On
Off
Diverting Valve
Off
Off
Off
Off
Off
Off
On
ECM Speed
On
On
On
On
On
On
Off
T-Stat Signal
Y1
Y1, Y2
Y1, Y2, W
W
Y1, O
Y1, Y2, O
HW
Damper
Off
Off
Off
On
Off
Off
Off
Auxiliary 1 - Out
On
On
On
Off
On
On
On
Operation Logic
Summary of Contents for T2GY
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