American Standard ACONT203AS42MA Installation And User Manual - Page 13
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Cooling with GAF2-S
Thermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
Pub. No.
11-HD19D1-1D-EN
Indoor Unit
R
G
W1
B
09/2020
Part No. 37-7777006
American Standard 203 Programmable Thermostat
Outdoor Unit
NOTES:
1) Wire third party condensate over ow
switches between Y of the thermostat
and Y1 of the air ow control board
2) X2 is required to energize aux heat
during defrost
Y
B
13