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APPENDIX C — CONTROLS OPERATION (CONT)
Fig. E — Mounted Thermostat Connection and Controls
Fig. F — Thermostat Control Board (By Others or Remote Mounted)
NOTE: Image depicts thermostat wired to control board.
Table E — 3-Speed ECM or PSC
CONNNECTION FUNCTION/DESCRIPTION
(+) 10V Not Used
(-) COM Ground Control Power
G3/HI Fan High Speed
G2/MED Fan Medium Speed
G1/LOW Fan Low Speed
W1/HTG Heat
Y1/CLG Cool
W2/HT2 Heat Stage 2
Y2/CL2 Cool Stage 2
R/24V 24V Controller Power
COS Changeover Sensor
RAS Room Air Sensor
Table F — 0-10 Variable Airflow ECM
CONNNECTION FUNCTION/DESCRIPTION
(+) 10V
Apply 0-10V signal for proportional fan
speed control
(-) COM Ground Control Power
G3/HI Not Used
G2/MED Not Used
G1/LOW Not Used
W1/HTG Apply 24V for Stage 1 Heat
Y1/CLG Apply 24V for Stage 1 Cool
W2/HT2 Apply 24V for Stage 2 Heat
Y2/CL2 Apply 24V for Stage 2 Cool
R/24V 24V Controller Power
COS Changeover Sensor
RAS Room Air Sensor
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