Lennox Merit 13HPX Series Installation Instructions Manual page 22

THERMAL SWITCH (S173)
GROUND WIRE
(GREEN)
CRANKCASE HEATER
(HR1) (−060 ONLY)
Figure 17. Typical Unit Factory Wiring
506727−01
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HIGH PRESSURE SWITCH
(S4)
LOW PRESSURE SWITCH
(S87)
REVERSING VALVE (L1)
DEFROST THERMOSTAT (S6)
CRANKCASE THERMOSTAT
(S40) − −042, 048, AND −060
UNITS ONLY
Compressor with Thermal Protection Switch (S173)
Page 22
LIQUID LINE
SUCTION LINE