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Expansion Valve Systems
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PDWFK XSV See table 3 for applicable check and ex-
pansion valve kits.
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FIGURE 7
HP23 COOLING CYCLE (SHOWING MANIFOLD GAUGE CONNECTIONS)
OUTDOOR
COIL
DEFROST THERMOSTAT
EXPANSION VALVE
FILTER / DRIER
WITH INTERNAL CHECK VALVE
STRAINER
TO
R--22
DRUM
LOW
PRESSURE
HIGH
PRESSURE
COMPRESSOR
REVERSING VALVE
VAPOR
LINE
VALVE
MUFFLER
CHECK
VALVE
NOTE -- ARROWS INDICATE DIRECTION OF REFRIGERANT FLOW
SERVICE
PORT
SUCTION
EXPANSION
VALVE
INDOOR UNIT
OUTDOOR UNIT
LIQUID LINE
SERVICE
PORT
GAUGE MANIFOLD
INDOOR
COIL
THERMOMETER
WELL
INTERNAL
COMPRESSOR
LIMIT
/,48,' 9$325 /,1( 6(59,&( 9$/9(6
The liquid line and vapor line service valves and
gauge ports are accessible by removing the compres-
sor access cover. Full service liquid and vapor line
valves are used. See figures 8 and 9. The service ports
are used for leak testing, evacuating, charging and
checking charge.
,03257$17
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