YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
YMGI: Your Modern Green Idea
33
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
Mod
el
Liquid / Gas
Line
Min - Max
Length/
+/-Elevation
Power Wire Min.
Disconnect Switch Box to
Outdoor Unit
Power/ Control Wire Min.
Outdoor Unit to Indoor Unit
Recommended HVAC
Circuit Breaker/Fuse
AMP (to Outdoor Unit)
09K
1/4" & 3/8"
15 - 49.2 / 16.4
L1/L2/G, 115V/1/60, 12AWG
1/2/3/G, 115V/1/60Hz, 4×AWG18
20
12K
1/4" & 3/8"
15 - 49.2 / 16.4
L1/L2/G, 115V /1/60, 10AWG
1/2/3/G, 115V/1/60Hz, 4×AWG18
30
18K
1/4" & 1/2"
15 - 49.2 / 16.4
L1/L2/G, 208-230/1/60, 12AWG
1/2/3/G, 208-230V/1/60Hz, 4×AWG18
20
24K
3/8" & 5/8"
15 - 49.2 / 16.4
L1/L2/G, 208-230/1/60, 10AWG
1/2/3/G, 208-230V/1/60Hz, 4×AWG18
30
30K
3/8" & 5/8"
15 - 49.2 / 16.4
L1/L2/G, 208-230/1/60, 10AWG
1/2/3/G, 208-230V/1/60Hz, 4×AWG18
30
36K
3/8" & 5/8"
15 - 49.2 / 16.4
L1/L2/G, 208-230/1/60, 10AWG
1/2/3/G, 208-230V/1/60Hz, 4×AWG18
30
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 24 inches, as illustrated below.
