Installation Conditions; Before Installation; Airtight Test - Toshiba RAV-GP1101AT8-E Manuel D'installation

Bender Bending pipes
Refrigerant recovery equipment Refrigerant recovery
Torque wrench Tightening flare nuts
Pipe cutter Cutting pipes
Refrigerant cylinder Charging refrigerant
Welding machine and nitrogen
Welding pipes
cylinder
Electronic refrigerant charging
Charging refrigerant
scale
Refrigerant Piping
R32 refrigerant
CAUTION
• Incomplete flaring may cause refrigerant gas leakage.
• Do not re-use flares. Use new flares to prevent refrigerant gas leakage.
• Use flare nuts that are included with the unit. Using different flare nuts may cause refrigerant gas leakage.
Use the following item for the refrigerant piping.
Material : Seamless phosphorous deoxidized copper pipe.
ø6.35, ø9.52, ø12.7 Wall thickness 0.8 mm or more
ø15.88 Wall thickness 1.0 mm or more
REQUIREMENT
When the refrigerant pipe is long, provide support brackets at intervals of 2.5 to 3 m to clamp the refrigerant pipe.
Otherwise, abnormal sound may be generated.
EN-149
- 75 -
Conventional tools (R410A)
Conventional tools (R32 or R410A)
Conventional tools (R410A)
Conventional tools (R410A)
Prepared newly (Use for R32 only)
Conventional tools (R410A)
Conventional tools (R32 or R410A)
4

INSTALLATION CONDITIONS

Before Installation

Be sure to prepare to the following items before installation.
Length of refrigerant pipe
Height difference
Length of refrigerant
(Indoor-outdoor)
pipe connected to
Indoor unit:
indoor/outdoor unit
Upper
3 to 75 m 30 m
* Caution during addition of refrigerant
Charge the refrigerant accurately. Overcharging may cause serious trouble with the compressor.
• Do not connect a refrigerant pipe that is shorter than 3 m.
This may cause a malfunction of the compressor or other devices.

Airtight Test

1. Before starting an airtight test, further tighten the spindle valves on the gas and liquid sides.
2. Pressurize the pipe with nitrogen gas charged from the service port to the design pressure (4.15 MPa) to conduct
an airtight test.
3. After the airtight test is completed, evacuate the nitrogen gas.
Air purge
• To purge air, use a vacuum pump.
• Do not use refrigerant charged in the outdoor unit to purge air. (The air purge refrigerant is not contained in the
outdoor unit.)
Electrical wiring
• Be sure to fix the power wires and indoor/outdoor connecting wires with clamps so that they do not come into
contact with the cabinet, etc.
Item
Outdoor unit:
Lower
Addition of refrigerant at the local site
is unnecessary for refrigerant pipe
lengths up to 30 m. If the refrigerant
30 m
pipe length exceeds 30 m, add
refrigerant in the amount given in
"Charging additional refrigerant".
EN-150