Design of 3WAY VRF SYSTEM
2 - 50
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8. Optional Parts
How to use the fittings
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Tapping screw (L=15/32"(12mm) : supplied )
Never use a long screw
other than the accessory screw.
This may bore a hole through
the tube surface, causing
refrigerant leakage.
Nut (field supplied) (3/8" or M10)
Suspension bolt (3/8" or M10) (field supplied)
Suspension hook
Washer (supplied)
Install the Suspension hook with supplied 4 screws (L=15/32" (12mm)) taking care of the positioning.
CAUTION
Wrong positioning will become unfitted center of gravity position,
causing injuries or product damage.
8-3-4. Wiring, Tubing and Heat Insulation
8-3-4-1. Refrigerant tubing
Cool with damp cloth or other means when brazing the joint with a torch.
Otherwise, the solenoid valve will be damaged.
Discharge tube
Liquid tube
Liquid tube
Suction tube
Gas tube
NOTE
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When brazing, be sure to perform nitrogen replacement inside the tube so that oxidation coating does not form
inside the tube. Then stop performing when nitrogen replacement is completed. The solenoid valve, however,
will be damaged if nitrogen is applied during while brazing.
Heat sensitive components, protect from flame and heat conduction.
Comply with all Local Code Requirements.
8-3-4-2. Heat Insulation
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Be sure to insulate the tubing after finishing leakage inspection.
Wrap insulators (field supplied) with the heat resistance of 248°F or more around the discharge tubes and gas
tubes, and 176°F or more around the suction tubes and liquid tubes.
Wrap around the each tube not to make gaps between the thermal insulation.
Failure to conduct shielding gaps and thermal insulation will cause water leakage.
TD831183-00_北米向け3WAY.indb 50 15/12/17 16:05:22
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