Heat Controller B-MMH09FA-1, B-MMH12FA-1, B-MMC12FA-1, B-MMC09FA-1, A-MMH24FA-1, A-MMH36FA-1 manual

Flaring Work and Connection of Piping

Flaring Work and Connection of Piping

Flaringwork

The main cause for gas leakage is due to defects in flaring work. Carry out correct flaring work using the following procedures.

Cut the pipes

1.Use the copper pipe purchased locally.

2.Measure the distance between the indoor and the outdoor 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.

Adding the Flare Nut

•Remove flare nuts attached to the indoor and outdoor unit, then put them on the end of the copper pipe once you hav completed burr removal (it is not possible to put them on after the flaring work)

Flaring work

•Carry out flaring work using flaring tool as shown below.

•Firmly hold copper pipe in the proper size hole dimension of the bar as shown in the table below.

Copper		Slanted	Uneven Rough
pipe	90°
		Pipe
		Reamer

Point down

Flare nut

Copper tube

Outside diameter		A
mm	inch	mm
Ø6.35	1/4	0~0.5
Ø9.52	3/8	0~0.5

	"A"		Handle
Bar		Bar
			Yoke
			Cone
	Copper pipe
		Clamp handle	Red arrow mark

- 23 - Service Manual