Flaring Work And Connection Of Piping - AERMEC MGH R410A Manuel D'installation

FLARING WORK AND CONNECTION OF PIPING

Flaring work
Main cause for gas leakage is due to
defect in flaring work. Carry out correct
flaring work in the following procedure.
1. Cut the pipes and the cable.
Use the piping kit accessory 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 longer than the
pipe length.
Copper
pipe
90°
2. Burrs removal
Completely remove all burrs from the
cut cross section of pipe/tube.
Put the end of the copper tube/pipe in
a downward direction as you remove
burrs in order to avoid dropping burrs
into the tubing.
Point down
3. Putting nut on
Remove flare nuts attached to indoor
and outdoor unit, then put them on
pipe/tube having completed burr
removal.
(not possible to put them on after
flaring work)
Flare nut
Copper tube
Slanted Uneven Rough
Pipe
Reamer
4. Flaring work
Carry out flaring work using dedicated flaring
tool for R-410A as shown below.
Outside diameter
mm
ø6.35
ø9.52
ø12.7
ø15.88
Firmly hold copper pipe in a die in the
dimension shown in the table above.
Bar
Copper pipe
Clamp handle
5. 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.
Smooth all round
Inside is shiny without scratches
Inclined
Even length
all round
6
A
inch mm
1/4 0~0.5
3/8 0~0.5
1/2 0~0.5
5/8 0~1.0
Handle
Bar
Yoke
Cone
Red arrow mark
= Improper flaring =
Surface Cracked Uneven
damaged thickness