Connecting Copper Pipes - Friedrich MR24UY3J Manuel D'installation

Connecting Copper Pipes

Preparation of Piping
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the fol-
lowing procedure.
Cut the pipes and the cable.
• Use the accessory piping kit or the pipes
purchased locally.
• Measure the distance between the indoor
and the outdoor unit.
• Cut the pipes a little longer than measured
distance.
• Cut the cable 1.5m (5ft) longer than the
pipe length.
Burr removal
• Completely remove all burrs from the cut
cross section of pipe/tube.
• Ensure that the tube/pipe is in the down-
ward position to keep burrs and other cont-
aminants from entering the system.
Installing flare nut
• Remove flare nuts attached to indoor and
outdoor units, than put them on pipe/tube
having completed burr removal.
(Not possible to put them on after flaring work)
Flaring work
• Carry out flaring work using dedicated flar-
ing tool for R-410A as shown below.
Outside diameter
mm
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
Check
• Compare the flared work with figure below.
• If flare is noted to be defective, cut off the
flared section and do flaring work again.
"A"
inch mm
1/4 1.1~1.3
3/8 1.5~1.7
1/2 1.6~1.8
5/8 1.6~1.8
Connecting Copper Pipes
Copper
tubing
90
Point down
Flare nut
Copper tubing
Bar
Bar
"A"
Copper tubing
Clamp handle
Smooth all round
Inside is shining without scratches
Inclined
Even length
all round
Slanted Uneven Rough
Pipe
Reamer
Handle
Yoke
Cone
Red arrow mark
= Improper flaring =
Surface Cracked Uneven
damaged thickness
Installation Manual 11