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

3
INSTALLATION OF NEW REFRIGERANT AIR
CONDITIONER
• The R410A refrigerant is more susceptible to impurities such as water, oxide membranes, oils, and fats.
With the adoption of the new refrigerant, the refrigerating oil has also been changed.
Be careful not to let water, dust, conventional refrigerant, and/or conventional refrigerating oil enter the refrigerating
cycle of the new refrigerant air conditioner.
• To prevent different refrigerant or refrigerating oil from becoming mixed, the sizes of the charging port of the unit
and the installation tool connection sections are different from those of the conventional refrigerant. Accordingly, the
following exclusive tools are required for the new refrigerant R410A.
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
Flare tool Flare machining of pipes
Bender Bending pipes
Refrigerant recovery equipment Refrigerant recovery
Torque wrench Tightening flare nuts
EN-11
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)
Usable if dimensions are adjusted.
R22 (Conventional tools)
For R410A only
Exclusive for Ø12.7 mm and Ø15.9 mm
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 kit
• When using the conventional piping kit with no indication of applicable refrigerant types, be sure to use it with a wall
thickness of 0.8 mm for Ø9.5 mm and with a wall thickness of 1.0 mm for Ø15.9 mm. Do not use the conventional
piping kit 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 Ø9.5 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".
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R22 (Conventional tools)
R22 (Conventional tools)
R22 (Conventional tools)
EN-12