Mitsubishi Electric PUHZ-W90VHA Service Manual page 3

Gravimeter
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No.
Gauge manifold
Charge hose
Electronic scale
Gas leak detector
Adaptor for reverse flow check
Refrigerant charge base
Refrigerant cylinder
Refrigerant recovery equipment
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
and operation check
Charge hose
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.
·Only for R410A
·Use the existing fitting specifications . (UNF1/2)
·Use high-tension side pressure of 5.3MPa·G or over.
·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
·Use the detector for R134a, R407C or R410A.
·Attach on vacuum pump.
·Only for R410A Top of cylinder (Pink)
Cylinder with syphon
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 (Usable if equipped
be used if equipped with adop-
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
3 3
Unit
Specifications
Can R407C tools be used?
(Usable if equipped
with adopter for rever- with adopter for rever-
se flow) se flow)