I took down the pictures of my aircon installer.

I am using mitsubishi inverter, 23SWG.

I am not sure if it is 1/2" insulation or 3/8".

My aircon installer insist it is 1/2".

There are 2 trunking.

1 is labelled Armacell class 1 armaflex H-010 (3/8")

Another one is labeeled Armacell class 1 armaflex H-006 (1/2")

Can anyone recall?

Thanks

Edited March 16, 201115 yr by zacksg73

Armacell class 1 armaflex is class "1" armaflex insulation

F stand for 3/8 inch thick

H stand for 1/2 inch thick

M stand for 3/4 inch thick

The 1/4 (0.8cm) or 3/8 (1cm) or 1/2 (1.5cm) indication on the insulation stand for the diameter of the holes.

Thank you Aaron. I thought the 3/8 is = 3/8inch, and keep arguing with my aircon installer LOL...

I guess I owe him an apology

May I know is that the standard way of running insulated piping above false ceiling? As in no trunking? Thanks

I thought the 3/8 is = 3/8inch, and keep arguing with my aircon installer LOL...

I think so, it's my thinking.

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Edited March 18, 201115 yr by yellowpin

Please see following for armaflex insulation details :

http://www.armacell.com/www/armacell/ACwww...strialUKROI.pdf

Please see following for armaflex insulation details :

http://www.armacell.com/www/armacell/ACwww...strialUKROI.pdf

I am new here.. lucky i saw this thread and will be installing my aircon in May.. So as long as i see a "H" mean i am safe?

I got a panasonic inverter system 3 from GC and upgraded the insulation to 1/2" and Gauge22 copper...

I am planning to get a Toshiba System 4..

Asked for a quote and was given class "1" armaflex insulation F-3/8 inch thick and copper pipes G23 - 0.61mm.

Is that gd enough? Should I upgrade any or both? Pls advise...

sorry for digging up this thread.

anyone know if when I upgrade the insulation to 1/2 it is possible to to squeeze all the trunking into a 3x 2 trunking or

alternatively can I dun upgrade the return coolant pipe - leave it as 3/8 and only upgrade the forward coolant pipe to 1/2? - will this configuration be able to let all the trunking for a system 4 go into a 3x 4 trunking?

Hi everyone, 

I have been doing some research about aircon and got my aircon installed.

I am sketical about their installation skill after I saw my copper pipe being exposed. The installer from g**n ***y assure me thats it's fine to have the copper wire exposed, since I am no expert in this, i can only take his words.

A month later, I realised my insulation pipe for the aircon is peeling and chipping off like the attached image.

It brings me to 2 conclusion, armacell's insulation pipe is of bad quality or the installer used fake armacell insulation pipe.

Anyone has similar experience? 

Yes It's usual practise for the wires to be expose. Based on my experience for the insulation foam, it's normal for wear and tear as it's exposed to the outdoor weather and sun. As times goes by, the insulation will sort of degrade and if there is a heavy rain, it may even peel off due to the rainwater hitting onto the insulation. For myself, I diy a plastic board and stick it above the insulation hoping to reduce the wear & tear. 

I've seen some contractors wrapping aluminium tape onto the insulation for the expose part and i believe it's also a protective measure.

Edited August 5, 201610 yr by Brandon Xue