Mitsubishi Electric Mr. Slim PUHZ-SHW230YKA Service Manual page 4

1-3. CAUTIONS FOR REFRIGERANT PIPING WORK
Tools for R410A (The following table shows whether conventional tools can be used or not.)
Tools and materials Use
Gauge manifold Air purge, refrigerant charge
Charge hose and operation check
Gas leak detector Gas leak check
Refrigerant recovery equipment
Refrigerant recovery
Refrigerant cylinder Refrigerant charge
Safety charger Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Charge valve Prevent gas from blowing out
when detaching charge hose
Vacuum pump Vacuum drying and air
purge
Bend the pipes
Bender
Pipe cutter Cut the pipes
Welder and nitrogen gas cylinder Weld the pipes
Refrigerant charging scale Charge refrigerant
Vacuum gauge or thermis- Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refri-
tor vacuum gauge and
gerant to thermistor vacuum gauge)
vacuum valve
Charging cylinder Refrigerant charge
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
OCH534
R410A tools Can R22 tools be used?
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adap-
ter for reverse flow check
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants
can be used
Tool exclusive for R410A
4
Can R407C tools be used?
(Usable if equipped (Usable if equipped
with adapter for rever- with adapter for rever-
se flow)
se flow)