UNIT MAINTENANCE &
SER
VICE GUIDE
INST
ALLER'S
INSTRUCTION
P29 OF 40
P30 OF 40
Heat insulator (indoor unit)
Interconnection cable
Sealing tape
Ribbon vinyl
Heat
insulator
(connection
pipe)
Sealing tape
Join the tubes insulators and refrigerating
connection so as there is no space.
Interconnection cable
Drain hose
Drain hose
PiPe
PiPe
Clamp
Pipe
Interconnection cable
RIibbon viyl
Wall
Out
Outdoor screw
Putty
Overlap nylon ribbon
or similar wrap.
Pipe of indoor unit
Connecting pipe
Seal Copper Line Set/Wire Cable/Drain Hose Line Combination
* Run cables along with the refrigerating copper line sets and secure them with tapes at 6 feet apart.
* Wrap tape closely (cover a third of the width of the nylon ribbon tape applied early) to get good seal.
* Tape to seal the end of taping.
* Shape the pipe combination gently, without causing kinking, sharp bending, or other damage to it.
* Fix the pipe combination securely on the external wall with proper clamps, as drafted below, at 6 feet apart.
* Fill the gap between the wall hole and wall sleeve with putty to keep from rain or dust getting inside.
CONNECT REFRIGERANT PIPES BETWEEN INDOOR AND OUTDOOR UNITS
PIPING GUIDE
To keep the allowed bending
radius, please make the
packed soft pipes vertical for
expanding.
Please do not expand
only one side of the
packed soft pipes.
Please make use of
semicircle pulley to keep
the allowed bending
radius.
Please use twisting
wheel to avoid improper
bending.
Please use rigid elbow
to keep the bending
radius while soft pipes
operating.
Please keep the
minimum bending
radius while installing.
Extremely bending could
damage the pipes.
Over length soft pipes
will lead to irregular
bending.
Undersize bending will
damage the soft pipe.
Short soft pipes will
have them bending
undersize, it's not
allowed.
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
CONNECT REFRIGERANT PIPES BETWEEN INDOOR AND OUTDOOR UNITS
Firstly, connect copper tubes at indoor unit. Bend
pipes by tools but not by hands. Extra length is
needed for future service.
REFRIGERANT PIPES:
For distance other than 25' between indoor and
horizontal venting condensing units, refer to the
following table for copper sizes.
Make sure the pipe section where is to be cut is
straight and smooth. Apply cutting blade straightly
perpendicular to the pipe surface. Don't cut too fast
or too hard. Turn and tighten the tube cutter slowly.
Remove residual left at the cutting edge. The cutting
edge should be clear and clean and smooth.
Running Interconnection Refrigerant Lines:
Use clean refrigeration grade of copper tubing only.
Keep the copper lines from kinking and transmitting
noise to walls, cabinets, etc. Not to exceed 100' with
35' of vertical lift included. Insulate the suction line
with at least 3/8" thick insulation tubes. Band and
tape and secure refrigerant lines. Support copper
lines at proper distance apart to keep tubes from
sagging.
CUT REFRIGERANT PIPE:
Connect Copper Pipes-Flare/nut Connection at Both Indoor and Outdoor Units
Proper torque shall be applied to make good connection at female nut, flare and male nut, as recommended in
the following table. Too much torque may damage and break flare/nut seal. Too less torque may not ensure
good seal. ALWAYS use a pair of wretches.
Flare Nut
1/4-3/8"
1/4-1/2"
1/2-3/4"
7/8-1 1/8"
Tightening Torque
25 Ft. LBs (350 Kgf.cm)
40 Ft. LBs (560 Kgf.cm)
60 Ft. LBs (840 Kgf.cm)
110Ft. LBs (1540 Kgf.cm)
Refrigerant Pipe Flare/Nut Connection Tightening Torque
Refrigerant Pipe Length and Height
CONNECT REFRIGERANT PIPES
In this case, put wet rag to protect valves or other components from being overheated. When using flux, rub the
tube surface using steel wool to shine and clean to dry as so to keep to-be-sealed system from any possible
contamination.
Connect Copper Pipes-Sweat Connection
Refrigerant Valve and Pipe Size/Length
K
Btu/h
09
12
18
Valve Size
Liq, Gas
1/4", 3/8"
1/4", 3/8"
1/4", 1/2"
15-30ft
1/4", 3/8"
1/4", 3/8"
1/4", 1/2"
31-60ft
1/4", 3/8"
1/4", 3/8"
1/4", 1/2"
Line Sizes at Different Length
1,000 Btu/h
09
12
18
Height (Ft.)
3.82
3.6
3.8
Length (Ft.)
23
24.3
31.4
