Page 13
III − REFRIGERANT SYSTEM
Refer to figure 12 and 13 for refrigerant flow in the heat-
ing and cooling modes. The reversing valve is energized
during cooling demand and during defrost.
FIGURE 12
HPXA12 COOLING CYCLE (SHOWING MANIFOLD GAUGE CONNECTIONS)
OUTDOOR
COIL
EXPANSION/CHECK
VALVE
BIFLOW
FILTER / DRIER
TO
R410A
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
INTERNAL
COMPRESSOR
LIMIT
DISTRIBUTOR
INDOOR
COIL
COIL SENSOR
FIGURE 13
HPXA12 HEATING CYCLE (SHOWING MANIFOLD GAUGE CONNECTIONS)
OUTDOOR
COIL
EXPANSION/CHECK
VALVE
BIFLOW
FILTER / DRIER
TO
R−410A
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
INTERNAL
COMPRESSOR
LIMIT
DISTRIBUTOR
INDOOR
COIL
COIL SENSOR
