Daikin DCG Series Service Instructions Manual page 27

SYSTEM OPERATION
Typical Package Cooling or Package Gas
Either a thermostatic expansion valve or restrictor orifice assembly may be used
depending on model. Refer to the parts catalog for the model being serviced.
Restrictor Orifice Assembly in Cooling Operation
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.
DCG/DCC***XXX**XXX
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