Technical question for aircon experts

[sacentre]

Can any aircon expert suggest what is the wall thickness of the tubing used in an aircon condenser? I'm referring to the tubing with all the alloy fins in the outdoor compressor unit.

I don't know if the tubing is copper or alloy (it's coated) but some idea of the wall thickness would help a lot.

I'm trying to repair a busted Sharp condenser which is part of a 2-split system running 2 x 9000 BTU indoor units. I'm not sure if the model number will be any help but it's a Sharp AUX3M24RV - Inverter.

It's a long shot, I realise, but any suggestions would be most helpful.

Thanks in advance
Trevor

[Rob White]

.

In what context are you want to know?

Are you attempting to repair a section or are you
wanting to replace a section?

The tubing in the coil is almost paper thin and has no
real structual stregnth without the aluminium fins, the
pipe is actually expanded into the fins to create a better
surface area contact and also to act as structual strength.

Normal pipe is about 22 gauge which works out at about
.75 mm (3/4mm) with high pressure refrigerants the pipe gauge
is about 16 gauge, about 1.25mm (1 1/4mm).

The pipe inside the coil will vary in gauge from manufacturer to
manufacturer but would be about 24 gauge .5mm (1/2mm)

Regards

Rob

.

[sacentre]

.

In what context are you want to know?

Are you attempting to repair a section or are you
wanting to replace a section?

The tubing in the coil is almost paper thin and has no
real structual stregnth without the aluminium fins, the
pipe is actually expanded into the fins to create a better
surface area contact and also to act as structual strength.

Normal pipe is about 22 gauge which works out at about
.75 mm (3/4mm) with high pressure refrigerants the pipe gauge
is about 16 gauge, about 1.25mm (1 1/4mm).

The pipe inside the coil will vary in gauge from manufacturer to
manufacturer but would be about 24 gauge .5mm (1/2mm)

Regards

Rob

.

Hi Rob
Thanks for the reply. I'm trying yo replace a short section about 3in long.

So the range could be .5 to .75mm. The refridgerant pressure the time it was charged was 150psi. Not sure if that counts as a high pressure system.
Thanks again
Trevor

[Rob White]

.

10barg (150psi) is quite low, newer systems are tested to nearly 50barg
thats about 750 ish psi.

What ever the coil is any refrigerant grade pipe you use will be thicker.

Where you will struggle is with the coil pipe being so thin you will need a
very delect touch when brazing to ensure you do not melt the coil pipes
or fins.

Leaks in coils are often repaired and sometimes it is easier to cut out the offending
loop and bypass it.

I don't need to remind you that in the UK and most other countries this type
of work needs to be done by a licenced fridgy and he would know all this.



Rob

.

[sacentre]

.

10barg (150psi) is quite low, newer systems are tested to nearly 50barg
thats about 750 ish psi.

What ever the coil is any refrigerant grade pipe you use will be thicker.

Where you will struggle is with the coil pipe being so thin you will need a
very delect touch when brazing to ensure you do not melt the coil pipes
or fins.

Leaks in coils are often repaired and sometimes it is easier to cut out the offending



loop and bypass it.

I don't need to remind you that in the UK and most other countries this type
of work needs to be done by a licenced fridgy and he would know all this.







Rob

.

Thanks again Rob. Much appreciated.