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FIELD
RELAY
C2
C1
2
4
O/W2
Y1
R
G
Y/Y2
W/W1
C
B
L
S1
S2
COMMERCIAL
THERMOSTAT
RC
RH
W1
W2
Y1
Y2
G
C
X
11
FIELD RELAY
DO NOT USE
TB2
542J150 and 180
NOTES:
1. Field relay P/N HN61KK224.
2. Set switch A to OFF (air conditioning). The 542J units do not have an
‘‘O’’ terminal.
O/W2
Y1
R
G
Y/Y2
W/W1
C
B
L
S1
S2
COMMERCIAL
THERMOSTAT
W1
W2
Y1
Y2
G
C
X
DO NOT USE
R
TB3
558G,H240-360
580G,H240-360
Fig. 4 — Thermostat Wiring (558G,H240-360 and 580G,H240-360)
Fig. 3 — Thermostat Wiring (542J150 and 180)
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