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48
SYSTEM OPERATION
EXPANSION VALVE/CHECK VALVE ASSEMBLY IN
COOLING OPERATION
EXPANSION VALVE/CHECK VALVE ASSEMBLY IN
HEATING OPERATION
RESTRICTOR ORIFICE ASSEMBLY IN
COOLING OPERATION
RESTRICTOR ORIFICE ASSEMBLY IN
HEATING OPERATION
Most expansion valves used in current Daikin Heat Pump products
use an internally checked expansion valve.
This type of expansion valve does not require an external check valve as shown above.
However, the principle of operation is the same.
In the cooling mode, the orifice is pushed into its seat,
forcing refrigerant to flow through the metered hole in
the center of the orifice.
In the heating mode, the orifice moves back off its seat,
allowing refrigerant to flow unmetered around the outside
of the orifice.
Summary of Contents for DAR09
Page 59: ...59 SERVICING Table 1 Quick Reference Table...
Page 81: ...81 AIRHANDLERS...
Page 96: ...96 REM OTE SPLITS...