Cautions For Refrigerant Piping Work; Additional Refrigerant Charge; Service Tools - Mitsubishi Electric PUHZ-SHW230YKA2 Service Manual

[2] Additional refrigerant charge

When charging directly from cylinder
· Check that cylinder for R410A on the market is a syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Electronic weighing scale

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name
Gauge manifold
1
Charge hose
2
Electronic weighing scale
3
Gas leak detector
4
Adaptor for reverse flow check
5
Refrigerant charge base
6
Refrigerant cylinder
7
Refrigerant recovery equipment
8

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
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment Refrigerant recovery
Refrigerant cylinder
Safety charger
Charge valve
Vacuum pump
Bender
Pipe cutter
Welder and nitrogen gas
cylinder
Refrigerant charging scale
Vacuum gauge or thermistor
vacuum gauge and vacuum
valve
Charging cylinder
×
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
Δ: Tools for other refrigerants can be used under certain conditions.
○
: Tools for other refrigerants can be used.
OCH594B
· Only for R410A
· Use the existing fitting specifications . (UNF1/2)
· Use high-tension side pressure of 5.3 MPa·G or over.
· Only for R410A
· Use pressure performance of 5.09 MPa·G or over.
· Use the detector for R134a, R407C or R410A.
· Attach on vacuum pump.
· Only for R410A
Use
Air purge, refrigerant charge
and operation check
Gas leak check
Refrigerant charge
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air purge
Bend the pipes
Cut the pipes
Weld the pipes
Charge refrigerant
Check the degree of vacuum.
(Vacuum valve prevents back
flow of oil and refrigerant to
thermistor vacuum gauge)
Refrigerant charge
Specifications
Top of cylinder (Pink)
Cylinder with syphon
R410A tools
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
adapter 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
Unit
—
—
—
Can R22 tools be used? Can R407C tools be used?
×
×
×
×
×
×
×
Δ(Usable if equipped Δ(Usable if equipped
with adapter for with adapter for
reverse flow) reverse flow)
○
○
○
○
○
×
×
×
○
×
×
×
×
○
○
○
○
○
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