BAS-PRC036-EN 3
Wire Terminals
Label Description
Non-Programmable Programmable
1Heat/
1Cool
3Heat/
2Cool
3Heat/
2Cool
Touch
Screen
(O/B)W (Changeover valve)
(a)
Heat relay
(Aux/E)W2 (Auxiliary or Emergency heat relay)
(a)
Second stage heat
(a) Text in parentheses applies to only heat pump systems.
(W1)W2 (Emergency heat relay)
(a)
Second stage relay
A Economizer relay
C Common
Dh Dehumidify relay
G Fan relay
Hp External humidity sensor power
Hs External humidity sensor input
(L) (Emergency heat indicator relay)
(a)
R 24 Vac heating
Rc 24 Vac cooling
S1 External temperature sensor
S2 External temperature sensor
Y Stage 1 compressor control relay
Y2 Stage 2 compressor control relay