Midea Ducted Series - Step 4: Connect Pipes

NOTICE
MINIMUM BEND RADIUS
Connect the copper pipes to the indoor unit first,
then connect it to the outdoor unit. You should
first connect the low-pressure pipe, then the
highpressure pipe.
When connecting the flare nuts, apply a thin
coat of refrigeration oil to the flared ends of
the pipes.
Align the center of the two pipes that you will
connect.
Tighten the flare nut snugly by hand.
Using a wrench, grip the nut on the unit tubing.
While firmly gripping the nut, use a torque
wrench to tighten the flare nut according to
the torque values in above table.
32-39 N.m
49-59 N.m
57-71 N.m
67-101 N.m
85-110 N.m
(180-200kgf.cm)
(320-390kgf.cm)
(490-590kgf.cm)
(570-710kgf.cm)
(670-1010kgf.cm)
(850-1100kgf.cm)
Flare shape
Tightening
torque
Pipe
gauge
Min. Max.
Flare dimension(A)
(Unit:mm/lnch)
CAUTION
Ensure to wrap insulation around the piping.
Direct contact with the bare piping may
result in burns or frostbite.
• Make sure the pipe is properly connected.
Over tightening may damage the bell
mouth and under tightening may lead to
leakage.
PIPING EXTENSION BEYOND FLARE FORM
Step 4: Connect pipes
•
•
•
•
•
Clamp flare from on the end of the pipe. The end
of the pipe must extend beyond the flare form.
•
Place flaring tool onto the form.
Turn the handle of the flaring tool clockwise
until the pipe is fully flared.
•
After connecting the copper pipes to the
indoor unit, wrap the power cable, signal
cable and the piping together with
binding tape.
•
•
•
Flare form
Pipe
Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and even
flaring.
Outdoor unit
Liquid side piping
(Smaller diameter)
(Bigger
Torque wrench
NOTICE
Use both a spanner and a torque wrench
when connecting or disconnecting pipes to/from
the unit.
Carefully bend the tubing in the middle
according to the diagram below.
DO NOT bend the tubing more than 90°
or more than 3 times.
NOTICE
DO NOT intertwine signal cable with other
wires. While bundling these items together.
DO NOT intertwine or cross the signal cable
with any other wiring.
Use appropriate tool
min-radius 10cm(3.9 )
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