Installation Of New Refrigerant Air Conditioner - Toshiba RAV-SP1104AT-A Installation Manual

3
INSTALLATION OF NEW REFRIGERANT AIR
CONDITIONER
CAUTION
New Refrigerant Air Conditioner Installation
• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY
OZONE LAYER.
R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working
pressure of R410A refrigerant is approx. 1.6 times as that of refrigerant R22. Accompanied with the adoption of the
new refrigerant, the refrigerant oil has also been changed. Therefore, during installation work, be sure that water, dust,
former refrigerant, or refrigerant oil does not enter the new type refrigerant R410A air conditioner cycle.
To prevent mixing of refrigerant or refrigerant oil, the sizes of connecting sections of charging port on main unit and
installation tools are different from those of the conventional refrigerant units. Accordingly, special tools are required
for the new refrigerant (R410A) units. For connecting pipes, use new and clean piping materials with high pressure
fittings made for R410A only, so that water and/or dust does not enter.
Required Tools/Equipment and Precautions for Use
Prepare the tools and equipment listed in the following table before starting the installation work.
Newly prepared tools and equipment must be used exclusively.
Legend
: Prepared newly (Use for R410A only. Do not use for refrigerant R22 or R407C etc..)
: Conventional tools/equipment are available
Tools/equipment
Gauge manifold
Vacuuming/charging refrigerant
and operation check
Charging hose
Charging cylinder Can not be used
Gas leak detector Gas leak check
Vacuum pump Vacuum drying
Vacuum pump with backflow
Vacuum drying
prevention function
EN-5
Use How to use tools/equipment
Prepared newly for R410A only
Prepared newly for R410A only
Unusable (Use the refrigerant charging measure
instead.)
Prepared newly
Unusable
R22 (Conventional tools)
- 3 -
Tools/equipment
Flare tool Flare machining of pipes
Bender Bending pipes
Refrigerant recovery equipment Refrigerant recovery
Torque wrench Tightening flare nuts
Pipe cutter Cutting pipes
Welding machine and nitrogen
Welding pipes
cylinder
Refrigerant charging measure Charging refrigerant
Refrigerant Piping
New refrigerant (R410A)
When using the conventional piping
• When using the conventional piping with no indication of applicable refrigerant types, be sure to use it with a wall
thickness of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, and with a wall thickness of 1.0 mm for Ø15.9 mm. Do
not use the conventional piping with a wall thickness less than these thicknesses due to insufficient pressure
capacity.
When using general copper pipes
• Use general copper pipes with a wall thickness of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, and with a wall
thickness of 1.0 mm for Ø15.9 mm.
Do not use any copper pipes with a wall thickness less than these thicknesses.
Flare nuts and flare machining
• The flare nuts and flare machining are different from those for the conventional refrigerant.
Use the flare nuts supplied with the air conditioner or those for R410A.
• Before performing flare machining, carefully read "REFRIGERANT PIPING".
Use How to use tools/equipment
Usable if dimensions are adjusted.
R22 (Conventional tools)
For R410A only
Exclusive for Ø12.7 mm and Ø15.9 mm
R22 (Conventional tools)
R22 (Conventional tools)
R22 (Conventional tools)
EN-6