Toshiba RAV-SM402MUT-E Installations-Handbuch Seite 16

5
REFRIGERANT PIPING AND EVACUATING
Piping with outdoor unit
• Shape of valve differs according to the outdoor unit.
For details of installation, refer to the Installation
Manual of the outdoor unit or twin Kit.
Air purge
Using a vacuum pump, perform vacuuming from the
charge port of valve of the outdoor unit.
For details, follow to the Installation Manual attached
to the outdoor unit.
• Never use the refrigerant sealed in the outdoor unit
for air purge.
REQUIREMENT
For the tools such as charge hose, etc., use those
manufactured exclusively for R410A.
Refrigerant amount to be added
For addition of the refrigerant, add refrigerant
"R410A" referring to the attached Installation Manual
of outdoor unit.
Be sure to use a scale to charge the refrigerant of
specified amount.
REQUIREMENT
• Charging an excessive or too little amount of
refrigerant causes a trouble of the compressor.
Be sure to charge the refrigerant of specified
amount.
• A personnel who charged the refrigerant should
write down the pipe length and the added refriger-
ant amount in the nameplate attached to the
service panel of the outdoor unit.
It is necessary to troubleshoot the compressor and
refrigeration cycle malfunction.
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Open the valve fully
Open the valve of the outdoor unit fully.
A 4mm-hexagonal wrench is required for opening the
valve.
For details, refer to the Installation Manual attached
to the outdoor unit.
Gas leak check
Check with a leak detector or soap water whether gas
leaks or not, from the pipe connecting section or cap
of the valve.
REQUIREMENT
Use a leak detector manufactured exclusively for
HFC refrigerant (R410A, R134a, etc.).
Thermal insulation process
Apply thermal insulation for the pipes separately at
liquid side and gas side.
For the thermal insulation to the pipes at gas side, be
sure to use the material with heat-resisting tempera-
ture 120°C or higher.
Using the attached thermal insulation material, apply
the thermal insulation to the pipe connecting section
of the indoor unit securely without gap.
REQUIREMENT
Apply the thermal insulation to the pipe connecting
section of the indoor unit securely up to the root
without exposure of the pipe.
(The pipe exposed to the outside causes water leak.)
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