7
Read Before Installation
Tools/Materials
Use
Notes
Gauge Manifold
Evacuating,refrigerant charging
5.09MPa on the High-pressure side.
Charging Hose
Evacuating, refrigerant charging
Hose diameter larger than the concentional ones.
Refrigerant Recovery Equipment
Refrigerant recovery
Refrigerant Cylinder
Refrigerant charging
Write down the refrigerant type. Pink in color at the top of the cylinder.
Refrigerant Cylinder Charging Port Refrigerant charging
Hose diameter larger than the conventional ones.
Flare Nut
Connecting the unit to piping
Use Type-2 Flare nuts.
Tools/Materials
Use
Notes
Gas leak detector
Detection of gas leaks
The ones for HFC type refrigerant may be used.
Vacuum Pump
Vacuum drying
May be used if a reverse flow check adaptor is attached.
Refrigerant Recovery Equipment
Recovery of refrigerant
May be used if designed for use with R410A.
Flare Tool
Flare machining of piping
Chages have been made in the flare machining dimension.Refer to the next page.
Tools/Materials
Use
Notes
Vacuum Pump with a Check Valve
Vacuum drying
Bender
Bending pipes
Pipe Cutter
Cutting pipes
Torque Wrench
Tightening flare nuts
Only 12.70 (1/2'') and 15.88(5/8'') have a larger flare machining dimension.
Welder and Nitrogen Cylinder
Welding pipes
Refrigerant Charging Meter
Refrigerant charging
Vacuum Gauze
Checking vacuum degree
Tools/Materials
Use
Notes
Charging Cylinder
Refrigerant Charging
Must not be used with R410-type units.
CAUTION
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 service handbook for symptoms relating to the
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.
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 )
2. Tools and materials that may be used with R410 with some restrictions
3. Tools and materials that are used with R22 or R407C that can also be used with R410A
4. Tool and materials that must not used with R410A
Tools for R410A must be handled with special care, and keep moisture and dust from entering the cycle.
