YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
29
PIPING GUIDE
Set the packed pipes in a
vertical position and then
unwind them slowly.
Do not unwind only one end of
the coiled pipes.
Use pulley or a bending tool
to ensure a safe bending
radius.
Do not make any sharp or small
radius bends.
May also use rolling wheel to
reduce internal pipe tension
and avoid possible
deformation.
Do not bend long sections of
pipe without using bending
tools.
Use an elbow tool for
consistent bending radius.
Do not make bends that are
less than 90 degrees.
Maintain the minimum
bending radius.
Do not bend shot pipes.
PIPING AND WIRING SIZES-UNITS
Unit
Connection Copper
Pipe Sizes
Min. / Max.
/-
Elevation
Wires from
Outdoor to Indoor
Unit
Min. Wire Size
Outdoor
– Indoor
Units
Fuse is Factory
Installed
09K
1/4” Liq. / 3/8” Gas
15/50/30/15
N(1)/2/3/G
18AWG
At Indoor
Control Board
12K
1/4 Liq. / 1/2” Gas
15/50/30/15
N(1)/2/3/G
18AWG
At Indoor
Control Board
18K
1/4 Liq. / 1/2” Gas
15/75/30/15
N(1)/2/3/G
16AWG
At Indoor
Control Board
24K
3/8 Liq. / 5/8” Gas
15/75/30/15
N(1)/2/3/G
16AWG
At Indoor
Control Board
The indoor unit and the outdoor unit can be at different heights either above or below each other. The height for
the difference must follow the stated requirements shown in the table below.
Keep bending of the piping line to a minimum to avoid any possible negative impacts on the performance of the
units.
Make a P-trap if the elevation drop difference is more than 25 inches, as illustrated below.
Refrigerant Pipe Min/Max. Length, Rise and Drop Height
Btu/h
Min. Length (ft.)
Max. Length (ft.)
Max Rise Height (ft.)
Max. Drop Height (ft.)
09K - 12K
15
50
20
28
18K - 24K
15
75
25
35
