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Necessary Apparatus And Materials And Notes On Their Handling - Mitsubishi Electric PEH-P8YE Technical & Service Manual

Air-cooled heat pump type packaged air conditioners, indoor unit
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[3] Necessary Apparatus and Materials and Notes on Their Handling

The following tools should be marked as dedicated tools for R407C.
<<Comparison of apparatus and materials used for R407C and for R22>>
Apparatus Used
Gauge manifold
Charging hose
Charging cylinder
Gas leakage detector
Refrigerant collector
Refrigerant cylinder
Vacuum pump
Vacuum pump with a check valve
Flare tool
Bender
Application oil
Torque wrench
Pipe cutter
Welder and nitrogen cylinder
Refrigerant charging meter
Vacuum gauge
Symbols:
To be used for R407C only.
Tools for R407C must be handled with more care than those for conventional refrigerants. They must not come into contact
with any water or dirt.
Use
Evacuating, refrigerant filling
Operation check
Refrigerant charging
Gas leakage check
Refrigerant collection
Refrigerant filling
Vacuum drying
Flaring of pipes
Bending of pipes
Applied to flared parts
Tightening of flare nuts
Cutting of pipes
Welding of pipes
Refrigerant charging
Checking the vacuum degree
Can also be used for conventional refrigerants.
–4–
R22
Current product
Current product
Current product
Current product
Shared with R134a
R22
For R407C use only
R22
Identification of dedi-
cated use for R407C:
Record
name and put brown
belt on upper part of
cylinder.
Current product
Can be used by attach-
ing an adapter with a
check valve.
Current product
Current product
Current product
Current product
Ester oil or Ether oil or
Alkybenzene (Small
amount)
Current product
Current product
Current product
Current product
Current product
R407C
Do not use
refrigerant

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