Mitsubishi Electric Mr.Slim PUHZ-SHW230YKA2, Service Manual

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4
OCH594B
[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
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1
Gauge manifold · Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3 MPa·G or over.
2
Charge hose · Only for R410A
· Use pressure performance of 5.09 MPa·G or over.
3
Electronic weighing scale —
4
Gas leak detector · Use the detector for R134a, R407C or R410A.
5
Adaptor for reverse flow check · Attach on vacuum pump.
6
Refrigerant charge base —
7
Refrigerant cylinder · Only for R410A Top of cylinder (Pink)
Cylinder with syphon
8
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 R410A tools Can R22 tools be used? Can R407C tools be used?
Gauge manifold Air purge, refrigerant charge
and operation check
Tool exclusive for R410A × ×
Charge hose Tool exclusive for R410A × ×
Gas leak detector Gas leak check Tool for HFC refrigerant × ○
Refrigerant recovery equipment Refrigerant recovery Tool exclusive for R410A × ×
Refrigerant cylinder Refrigerant charge Tool exclusive for R410A × ×
Safety charger Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Tool exclusive for R410A
× ×
Charge valve Prevent gas from blowing out
when detaching charge hose
Tool exclusive for R410A
× ×
Vacuum pump Vacuum drying and air purge Tools for other refrigerants
can be used if equipped with
adapter for reverse flow check
Δ(Usable if equipped
with adapter for
reverse flow)
Δ(Usable if equipped
with adapter for
reverse flow)
Bender Bend the pipes Tools for other refrigerants can be used ○ ○
Pipe cutter Cut the pipes Tools for other refrigerants can be used ○ ○
Welder and nitrogen gas
cylinder
Weld the pipes Tools for other refrigerants can be used
○ ○
Refrigerant charging scale Charge refrigerant Tools for other refrigerants can be used ○ ○
Vacuum gauge or thermistor
vacuum gauge and vacuum
valve
Check the degree of vacuum.
(Vacuum valve prevents back
flow of oil and refrigerant to
thermistor vacuum gauge)
Tools for other refrigerants can be used
○ ○
Charging cylinder Refrigerant charge Tool exclusive for R410A × -
×
: 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.