Toshiba HWS-802H-E Installations-Handbuch Seite 6

Air to Water Heat Pump
Required Tools/Equipment and Precautions for Use
Prepare the tools and equipment listed in the following table before starting 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
Charging hose
Charging cylinder
Gas leak detector
Vacuum pump with backflow
prevention function
Vacuum pump with backflow
prevention function
Flare tool
Bender
Refrigerant recovery equipment
Torque wrench
Pipe cutter
Refrigerant cylinder
Welding machine and nitrogen
cylinder
Refrigerant charging measure
Refrigerant Piping
New refrigerant (R410A)
When using the conventional piping kit
• When using the conventional piping kit that has 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. Never 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 Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, and with a
wall thickness of 1.0 mm for Ø15.9 mm.
Never 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 to Water Heat Pump or those for R410A.
• Before performing flare machining, carefully read "REFRIGERANT PIPING"
5-EN
Use
Vacuuming/charging
refrigerant and operation
check
Can not be used
Gas leak check
Vacuum drying
Vacuum drying
Flare machining of pipes
Bending pipes
Refrigerant recovery
Tightening flare nuts
Cutting pipes
Charging refrigerant
Welding pipes
Charging refrigerant
– 6 –
Outdoor Unit Installation Manual
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
R22 (Conventional tools)
For R410A only
Discriminated by the refrigerant name on the cylinder.
R22 (Conventional tools)
R22 (Conventional tools)