19
CATUION
■ Execute proper grounding. Do not connect the ground wire to a gas pipe, water pipe, lightening rod or a
telephone ground wire.
■ Improper placement of ground wires can result in electric shock.
■ The installation of an earth leakage breaker is necessary depending on the established location of the unit.
■ Not installing an earth leakage breaker may result in electric shock.
■ Do not install the unit where there is a concern about leakage of combustible gas. The rare event of leaked gas
collecting around the unit could result in an outbreak of re.
■ For the drain pipe, follow the installation manual to insure that it allows proper drainage and thermally insulate it
to prevent condensation. Inadequate plumbing can result in water leakage and water damage to interior items.
8.2 Refrigerant piping
Outdoor
Indoor 1
Indoor 2
Indoor 3
Indoor 4
a. Pipe "a" diameter (between indoor and branch pipe) (depends on indoor pipe)
Indoor(×100W) 07~09 Gas pipe φ9.52 Liquid pipe φ6.35
12~18 φ12.7 φ6.35
24 φ15.88 φ9.52
b. Pipe "b" diameter (between branch pipe)
The branch pipe diameter depends on the total capacity of indoors connected with it. If indoor capacity is more than
outdoor capacity, it is conrmed by the outdoor capacity.
Total indoor capacity after the branch pipe (100W) Gas pipe Liquid pipe
<112 φ15.88 φ9.52
112<X<234 φ19.05 φ9.52
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