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Tool Preparation - Mitsubishi Electric PURY-HP72 Service Handbook

R410a
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[1-1 Preparation for Piping Work ]
1-1-2

Tool Preparation

Prepare the following tools and materials necessary for installing and servicing the unit.
Tools for use with R410A (Adaptability of tools that are for use with R22 or R407C)
1. To be used exclusively with R410A (not to be used if used with R22 or R407C)
Tools/Materials
Gauge Manifold
Charging Hose
Refrigerant Recovery Cylinder
Refrigerant Cylinder
Charging Port on the Refrigerant Cylinder Refrigerant charging
Flare Nut
2. Tools and materials that may be used with R410A with some restrictions
Tools/Materials
Gas Leak Detector
Vacuum Pump
Flare Tool
Refrigerant Recovery Equipment
3. Tools and materials that are used with R22 or R407C that may also be used with R410A
Tools/Materials
Vacuum Pump with a Check Valve
Bender
Torque Wrench
Pipe Cutter
Welder and Nitrogen Cylinder
Refrigerant Charging Meter
Vacuum Gauge
4. Tools and materials that must not be used with R410A
Tools/Materials
Charging Cylinder
Tools for R410A must be handled with special care to keep moisture and dust from infiltrating the cycle.
HWE13080
Use
Evacuation and refrigerant charging
Evacuation and refrigerant charging
Refrigerant recovery
Refrigerant charging
Connection of the unit with the pipes
Use
Gas leak detection
Vacuum drying
Flare processing
Refrigerant recovery
Use
Vacuum drying
Bending pipes
Tightening flare nuts
Cutting pipes
Welding pipes
Refrigerant charging
Vacuum level check
Use
Refrigerant charging
- 4 -
Notes
Higher than 5.09MPa[738psi] on the
high-pressure side
The hose diameter is larger than the
conventional model.
The refrigerant type is indicated. The
cylinder is pink.
The charge port diameter is larger
than that of the current port.
Use Type-2 Flare nuts.
Notes
The ones for use with HFC refrigerant
may be used.
May be used if a check valve adapter
is attached.
Flare processing dimensions for the
piping in the system using the new re-
frigerant differ from those of R22. Re-
fer to the following page(s). [1-2-1
Piping Materials](page 5)
May be used if compatible with
R410A.
Notes
Only the flare processing dimensions
for pipes that have a diameter of
ø12.7 (1/2") and ø15.88 (5/8") have
been changed.
Notes
Prohibited to use
GB

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