Flaring Work And Connection Of Piping; Flaring Work - Heat Controller DMH18DB-1 Service Manual

Flaring Work and Connection of Piping

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.
Cut the pipes and the cable.
1. Use the piping kit accessory or the pipes purchased
locally.
2. Measure the distance between the indoor and the out-
door unit.
3. Cut the pipes a little longer than measured distance.
4. Cut the cable 1.5m (5.0ft) longer than the pipe length.
Burrs removal
1. Completely remove all burrs from the cut cross section
of pipe/tube.
2. 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.
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)
Flaring work
• Carry out flaring work using flaring tool as shown below.
• Firmly hold copper pipe in a Bar in the dimension shown
in the table below.
Outside diameter
mm inch
Ø6.35 1/4
Ø9.52 3/8
18 Multi type Air Conditioner
A
mm
1.1~1.3
1.5~1.7
Copper
pipe
90°
Point down
Flare nut
Copper tube
Bar
Bar
Copper pipe
Clamp handle
Slanted Uneven Rough
Pipe
Reamer
Handle
Yoke
Cone
Red arrow mark