YMGI VRFI-07EL-D2B(55)5, Руководство пользователя

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
Do not use mineral oil on the flared part.

Prevent mineral oil from getting into the system as this would reduce the life expectancy of the units.

Never use piping that has been used for previous installations. Only use parts which are delivered with the unit.

Never install a drier into this R410A unit, as the drying material may dissolve and damage the system and
decrease the life expectancy of the unit.

Poor flaring may cause a refrigerant gas to leak.
Connecting the refrigerant pipe
1. Use torque wrenches when tightening the flare nuts. This will prevent damage to the flare nuts and gas leaks.
2. Align the centers of both flares and tighten the flares. Tighten the flare nuts 3 or 4 turns by hand. Then full
tighten them with the torque wrenches.
3. To prevent gas leakage, apply refrigeration oil on both inner and outer surfaces of the flare.
(Use refrigeration oil for R410A.)
Flare Nut Tightening Torque
Gas side Liquid side
07/09 class 12/18 class 07/09/12/18 class
3/8 inch 1/2 inch 1/4 inch
32.7-39.9 Nm
(24.1-29.4 Ft.Lbs)
49.5-60.3 Nm
(36.5-44.5 Ft.Lbs)
14.2-17.2 Nm
(10.5-12.7 Ft.Lbs)
Piping Handling

Protect the open end of the pipe from dust and moisture.

All pipe bends should be as gentle as possible. Always use a pipe bender for bending.
(Bending radius should be 30 to 40mm or 1-1/4 to 1-9/16 inches or larger.)