Thermostat - Output Terminals; Wiring Guide - Conventional Systems (24Vac) - Emerson 810-1600 Installation And Operation Manual

2.4.4. Thermostat — Output Terminals
Y1 Cool Stage 1, relay output
Y2 Cool Stage 2, relay output
W1 Heat Stage 1, relay output
W2 Heat Stage 2, relay output
G Fan Control, relay output
O/B Reversing valve, relay output
ECO Economizer, relay output
AUX Dehumidification, relay output
Table 2-4 - Output Terminals

2.4.5. Wiring Guide - Conventional Systems (24VAC)

Shorting
Jumper
Wiring and Connections
Thermostat Outputs
R 24VAC Power Supply
Rc 24VAC Power Supply for Y1, Y2
C 24VAC Power Supply Common
Y1 Cool Stage 1, relay output
Y2 Cool Stage 2, relay output
W1 Heat Stage 1, relay output
W2 Heat Stage 2, relay output
G Fan Control, relay output
Table 2-5 - Single Transformer System
2H / 2C System with
1 Transformer
Installation • 7