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Concealed Duct High Static Pressure
Installation Manual
EN
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 refrigerant amount in
the nameplate attached to the service panel of the
outdoor unit. It is necessary to fix the compressor and
refrigeration cycle malfunction.
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.).
Heat insulation process
Apply heat insulation for the pipes separately at liquid side
and gas side.
For the heat insulation to the pipes at gas side, be sure to use
the material with heat-resisting temperature 120°C or higher.
Using the attached heat insulation material, apply the heat
insulation to the pipe connecting section of the indoor unit
securely without gap.
REQUIREMENT
• Apply the heat 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.)
• Wrap heat insulator with its slits facing up (ceiling side).
Indoor unit
Union
Heat insulation
(Accessory)
Flare nut
Heat insulator of
the pipe
24-EN
+00EH99871101.book Page 24 Friday, April 23, 2010 6:05 PM
Summary of Contents for RAV-SM2242DT-E
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