Lennox 12HPB Series

Page 9
FIGURE 12
12HPB COOLING CYCLE (SHOWING MANIFOLD GAUGE CONNECTIONS)
OUTDOOR
COIL
DEFROST THERMOSTAT
EXPANSION/CHECK
VALVE
BIFLOW
FILTER / DRIER
TO
R−22
DRUM
LOW
PRESSURE
HIGH
PRESSURE
COMPRESSOR
REVERSING VALVE
VAPOR
LINE
VALVE
MUFFLER
NOTE − ARROWS INDICATE DIRECTION OF REFRIGERANT FLOW
SERVICE
PORT
SUCTION
EXPANSION/CHECK
VALVE
INDOOR UNIT
OUTDOOR UNIT
LIQUID LINE
SERVICE
PORT
GAUGE MANIFOLD
THERMOMETER
WELL
DISTRIBUTOR
INDOOR
COIL
FIGURE 13
12HPB HEATING CYCLE (SHOWING MANIFOLD GAUGE CONNECTIONS)
OUTDOOR
COIL
DEFROST THERMOSTAT
EXPANSION/CHECK
VALVE
BIFLOW
FILTER / DRIER
TO
R−22
DRUM
LOW
PRESSURE
HIGH
PRESSURE
COMPRESSOR
REVERSING VALVE
VAPOR
LINE
VALVE
MUFFLER
NOTE − ARROWS INDICATE DIRECTION OF REFRIGERANT FLOW
SERVICE
PORT
SUCTION
EXPANSION/CHECK
VALVE
INDOOR UNIT
OUTDOOR UNIT
LIQUID LINE
SERVICE
PORT
GAUGE MANIFOLD
THERMOMETER
WELL
DISTRIBUTOR
INDOOR
COIL