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Read Before Installation
Items to Be Checked
(1). Verify the type of refrigerant used by the unit to be serviced. Refrigerant Type: R410A
(2). Check the symptom exhibited by the unit to be serviced. Look in this
refrigerant cycle.
(3). Be sure to carefully read the safety precautions at the beginning of this document.
(4). If there is a gas leak or if the remaining refrigerant is exposed to an open flame, a noxious gas hydrofluoric acid may
form. Keep workplace well ventilated.
CAUTION
Install new pipes immediately after removing old ones to keep moisture out of the refrigerant circuit.
Chloride in some types of refrigerants such as R22 will cause the refrigerating machine oil to deteriorate.
Necessary Tools and Materials
Prepare the following tools and materials necessary for installing and servicing the unit.
Necessary tools for use with R410A(Adaptability of tools that are for use with R22 and 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 Equipment
Refrigerant Cylinder
Refrigerant Cylinder Charging Port
Flare Nut
2. Tools and materials that may be used with R410 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 can 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 Gauze
4. Tool and materials that must not used with R410A
Tools/Materials
Charging Cylinder
Tools for R410A must be handled with special care, and keep moisture and dust from entering the cycle.
Use
Evacuating,refrigerant charging
Evacuating, refrigerant charging
Refrigerant recovery
Refrigerant charging
Refrigerant charging
Connecting the unit to piping
Use
Notes
Detection of gas leaks
The ones for HFC type refrigerant may be used.
Vacuum drying
May be used if a reverse flow check adaptor is attached.
Flare machining of piping
Chages have been made in the flare machining dimension.Refer to the next page.
Recovery of refrigerant
May be used if designed for use with R410A.
Use
Notes
Vacuum drying
Bending pipes
Tightening flare nuts
Only
Cutting pipes
Welding pipes
Refrigerant charging
Checking vacuum degree
Use
Notes
Refrigerant Charging
Must not be used with R410 type units.
service
handbook for symptoms relating to the
Notes
5.09MPa on the High pressure side.
Hose diameter larger than the concentional ones.
Write down the refrigerant type. Pink in color at the top of the cylinder.
Hose diameter larger than the conventional ones.
Use Type 2 Flare nuts.
12.70 (1/2'') and
15.88(5/8'') have a larger flare machining dimension.
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