CLEANING OUT THE REFRIGERATION SYSTEM AFTER BURNOUT (CONT.)
An unused filter-drier or other suitable medium may be used as the
Fill reservoir with fluorocarbon refrigerant, (Item 10, table D-1)
and start the pump.
Continue filling the reservoir with refrigerant,
until it begins to pour out of the return line.
Continue flushing for
at least 15
pump connections, replace the filter with a new filtering
back-flush the system for an additional 15 minutes.
Remove the pump, reservoir, filter and filter-drier jumper.
Place an empty container below the compressor connection, and connect
a cylinder of dry nitrogen (Item 8, table D-1) to each filter-drier
connection in turn.
Blow down each leg of the system at 50 psig (3.5
kg/cm 2) for at least 30 seconds.
Disassemble both expansion valves and re-install the valve cages. In-
stall new gaskets, and assemble the valves, making sure that projections
on valve cages fit in notches in valve bodies.
Disconnect the dry nitrogen cylinder, and immediately install a new
filter-drier, making sure that the direction of flow arrow points up.
Cap or plug compressor connections if compressor is not to be installed
Replace compressor in accordance with paragraph 5-35.