Robinair 342000 Refrigerant Service Solution - Manual (Page 23)

21
342000 Refrigerant Service Solution
FLUSHING PROCESS
The 342000 provides a method of removing oil by forcing liquid refrigerant
through the A/C system or components of the A/C system. A special flushing
adapter to access the system at the compressor block is available as an acces-
sory. After flushing, the refrigerant is recovered by the 342000 and is filtered
by the recycling circuit, returning it to SAE purity levels. A/C system configu-
rations vary and may require adapting and flushing of individual components.
NOTE: The 342000 must have at least 7 lbs. of refrigerant available for
charging in the internal storage vessel.
Use the following procedure which works with an orifice tube system:
1. Locate the 342000 MAIN MENU on the control panel and do the following:
a. Press the SCROLL MENU key.
b. Press the OIL FLUSH key.
2. Follow the on-screen instructions and consult any service bulletins as
needed:
a. Recover refrigerant as described under RECOVER on page 16 of this
manual.
b. Make sure the 342000 oil drain bottle on the side of the unit
is empty and in place at this time.
c. Close service coupler valves and disconnect hoses from the vehicle
access ports.
d. Close the valve on the external source tank.
NOTE: During flushing, most of the refrigerant is charged into the ve-
hicle A/C system. If you exit the flushing cycle prior to completion without
having closed the valve, the 342000 will automatically add refrigerant to
the internal storage vessel and there will be no room to recover the refrig-
erant used for flushing.
e. Remove the A/C system orifice tube and reconnect the fittings to create
a bypass.
f. Disconnect the compressor block at the rear of the compressor.
g. Attach the compressor block adapter (provided in the flushing kit) to
the system side of the compressor block.
h. Configure the block connectors as desired to provide forward or back
flushing of the refrigerant. The red high side connection hose from the
342000 is the refrigerant source and refrigerant flows through it into
the system. Open the red service coupler.
i. Connect the filter housing to the desired return side of the adapter block
and to the blue low side hose. Open the blue service coupler.
j. Make sure a flushing filter is properly installed in the flushing filter
housing. Open the isolation valve on the hose.
Operating Instructions
The orifice
tube must be
removed and a
TXV needs to
be bypassed.
IMPORTANT!
Always follow
vehicle
manufacturer’s
instructions
for flushing.