O/W2
Y1
R
G
Y/Y2
W/W1
C
B
L
DO NOT USE
S1
S2
COMMERCIAL THERMOSTAT
CONNECTION
BOARD
R
Y1
Y2
W1
W2
G
C
X*
*Does not apply to 558D and
NOTES:
1.558D and
2.For 548D and 549B heat pump applications, set switch A to OFF (air conditioning). The 548D and 549B units do not have an ``O'' terminal.
Fig. 1 Ð Thermostat Wiring (548D036-120; 549B036-120; 551B036-150;
558D036-150; 580D036-150; 581B036-150)
O/W2
Y1
R
G
Y/Y2
W/W1
C
B
L DO NOT USE S1 S2
TB2
W2
W1
R
C
Y1
Y2
G
X
COMMERCIAL
THERMOSTAT