Snap-On Dual 3412 - Maintenance and Support; Equipment Tips and Filter Maintenance

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Use this chapter to maintain
DDuuaall 33441122
:
• Master filter,
• Pump, and
• When stored for prolonged periods.
Troubleshooting information and a list of parts and accessories
are also included.
Equipment Tips
pA stable scale weight reading, with the refrigerant not moving
around in the recovery tank, is needed at the beginning and
end of a recycle or charge program. Do not lean on or move
the unit at these times.
pNever attempt to change the recovery tank during unit
operation.
pAlways evacuate service hoses before disconnecting from
DDuuaall 33441122
or manifold gauge set. For additional information
refer to Chapter 2Evacuating Service Hoses.
pNever drop a recovery tank onto scale. This may damage
scale assembly.
pAlways oil seals before connection to any tank, filter or fitting.
A leaky connection or no-flow condition may result if
connection is assembled dry.
pAlways close all tank valves–clockwise–on both recovery
tanks when
DDuuaall 33441122
is not in use.
pNon-condensable gasses must be purged from the recovery
tank. For additional information refer to Chapter 2Purging
Non-condensable Gas.