Refrigerant System - Lennox HPXA12 Series Unit Information

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.
HPXA12 COOLING CYCLE (SHOWING MANIFOLD GAUGE CONNECTIONS)
EXPANSION/CHECK
VALVE
LOW HIGH
PRESSURE PRESSURE
GAUGE MANIFOLD
TO
LIQUID LINE
R410A
SERVICE
DRUM
PORT
HPXA12 HEATING CYCLE (SHOWING MANIFOLD GAUGE CONNECTIONS)
EXPANSION/CHECK
VALVE
LOW HIGH
PRESSURE
PRESSURE
GAUGE MANIFOLD
TO
LIQUID LINE
R−410A
SERVICE
DRUM
PORT
OUTDOOR UNIT
DISTRIBUTOR
COIL SENSOR
BIFLOW
OUTDOOR
FILTER / DRIER
COIL
INTERNAL
COMPRESSOR
LIMIT
MUFFLER
COMPRESSOR
NOTE − ARROWS INDICATE DIRECTION OF REFRIGERANT FLOW
FIGURE 12
OUTDOOR UNIT
DISTRIBUTOR
COIL SENSOR
BIFLOW
OUTDOOR
FILTER / DRIER
COIL
INTERNAL
COMPRESSOR
LIMIT
MUFFLER
COMPRESSOR
NOTE − ARROWS INDICATE DIRECTION OF REFRIGERANT FLOW
FIGURE 13
Page 13
REVERSING VALVE
SUCTION
SERVICE
VAPOR
PORT
LINE
VALVE
EXPANSION/CHECK
VALVE
REVERSING VALVE
SUCTION
SERVICE
VAPOR
PORT
LINE
VALVE
EXPANSION/CHECK
VALVE
INDOOR UNIT
INDOOR
COIL
INDOOR UNIT
INDOOR
COIL