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Air conditioning - Any recommendations please??

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Old 27-11-2013, 11:11 PM   #3976
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thanks to all bro for advices.

may I also know what's the difference between insulflex and armaflex piping? are they just different brand, and both are ok?
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Old 28-11-2013, 09:01 AM   #3977
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thanks to all bro for advices.

may I also know what's the difference between insulflex and armaflex piping? are they just different brand, and both are ok?
Different in quality, quality for Armaflex more better than Insuflex.
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Old 28-11-2013, 09:31 AM   #3978
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Hello Badkham07,

Supposedly both are just different brandings of insulation.
There are many brands available in the market.

You will be able to find more info via the specifications of the 2 brands below:

Armaflex

http://www.armacell.com/WWW/armacell...aflexUKROI.pdf


Insuflex
http://www.insulflex.com.my/specific...cification.pdf

The main concern for aircon insulation should be the water absorption and the water vapour diffusion resistance factor more then the fire retardency factors.

If you are to compare the specifications of Armaflex and Insulflex, you will find that basically in terms of water absorbtion and diffusion resistance, Armaflex has a slight advantage. However do note that both uses different test methods to derive their test results.

Personally I would prefer Armaflex as compared to other brands.
Good Luck in your sourcing.


Best Regards,

Jason Tham

thanks to all bro for advices.

may I also know what's the difference between insulflex and armaflex piping? are they just different brand, and both are ok?
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Old 28-11-2013, 11:48 PM   #3979
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hi guys!

I've engaged 'Acecool' for AC servicing last week, just wanna share their good services over here. They still cleaned up the floor after servicing even thou I stopped them bcos I've a helper at home. So, overall I had a great experience with them, no harm engaging their services in the future.
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Old 04-12-2013, 02:03 PM   #3980
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Hi guys,

I'm currently looking for Mit Starmex sys 4 inverter for my new BTO (3 rooms same size, living room bigger one).
Any recommendations on who I should go to and rough price gauge?
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Old 04-12-2013, 08:03 PM   #3981
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To eenick,

Bedrooms usually 9k is enough.
Living either 18 or 24k.
Ard $4k should be able to get it done.
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Old 05-12-2013, 08:47 AM   #3982
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Hi guys,

I'm currently looking for Mit Starmex sys 4 inverter for my new BTO (3 rooms same size, living room bigger one).
Any recommendations on who I should go to and rough price gauge?
9,000 BTU for bedroom
24,000 BTU for living room
Mitsubishi Starmex System 4 Inverter 4A28 compressor will be suitable.

Joevyis
9░▒░▒░▒░

Last edited by sunsetbay; 05-12-2013 at 09:45 AM.. Reason: Phone no. edited~ P.S. Any commercial solicited content will be removed
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Old 05-12-2013, 01:51 PM   #3983
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Exclamation why u need chemical cleaning and Top up gas ?

wmwmwm wrote:

Second that. By all means avoid this bloody tech v. Their package price is cheap, then second time came said need to top up gas to my newly installed Aircon. Although we suspected but didn't think too much. Third time said top up gas again and want to do chemical wash. Today they came and talk chemical wash again! I said my starmax only 1yr old already topup gas twice. Then they said no this time not topup gas, ish to use gas to wash outdoor unit. And quote us 380 for dunno what gas wash and chemical wash. If I continue engage them every year can buy a new set of Aircon already. Use tech v at your own risk.



Only air con not cool or got smell then need to chemical clean .( 3 year 1 time chemical clean ) Top up of gas also same every 3 year a time ( if u feel your air con is not cooling ).

Outside many contractor always recommend chemical clean and top up gas . so they can earn u more money
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Old 06-12-2013, 01:38 PM   #3984
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Question Mitsubisht "cleaning free, pipe reuse"

Hi, greetings to all,

Great forum!! hoping that I could get some advice from our bros from here. TIA.

Currently, my 10 years old daikin system 4 (R22) is beyong repair as daikin quoted abt 2k in repairing. All my pipings (tested no leak) and wirings are concealed, now wana consider to change MIt R410.

1) I came to know Mit Elec MXY-4A28VA have this call "cleaning free, pipe reuse" technology, dont what it is? but sound like it could just reuse the old pipes without special flushing/treatment, would some guru advise me?

2) I am also considering Mit HI SCM80zj system4 that quoted cheaper by abt $200 as compared to above, but did not mention the "pipe reuse" technology.

3) the aircond servicing technician told me, just vacum the piping will do, which i feel very uncomfortable with the remarks.

When google for the information, some said pipes need flusing with nitogen, I confused liao. would appreciate very much if any one could share their views of changing R22 to R140 using back existing pipings experiences.

Last edited by tspt88; 06-12-2013 at 02:52 PM..
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Old 06-12-2013, 02:56 PM   #3985
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Hello TSPT88,

1) Yes MIT Elec boasts a "Cleaning Free Pipe Reuse" technology whereby existing R-22 pipings can be reused with MIT Elec R410A Inverter system.

This is an excellent technology from MIT which reduces wastes and also promotes the use of the more environmental friendly R410A gas.

However there are several points that you might want to note.

- Even though the original pipings that you have is leak free (hopefully pressure tested to be sure), they are already 10 years of age. You will be installing a new unit that would last you for a minimum of 7 years which would mean that your existing pipings will have to last for 17 years minimum. That is a rather long time for pipings to hold even though it is still possible. However this would still be a risk that you would have to weigh.

- In my opinion, it is still encouraged to Flush with Nitrogen and Vacuum before installation as an added precaution as any residue left in the pipes might cause unwanted chemical reaction which could cause premature breakdown of your unit. Prior to that, it is important to ensure that the pump-down process is done in order to recover the refrigerant in the system.

- As R410A gas has a higher running pressure, the pipes used are generally thicker therefore it is important to ensure that your current existing piping flare/diameter/thickness matches MIT specs for your model MXY-4A28VA. Your installer should be able to help you with this part.

2) Both MIT Elec and MHI are good brands. Personally I would prefer the MIT ELEC over the MHI

My take is that there is no right or wrong for the re-use of existing pipings. Most importantly is to ensure that the piping specifications meet your newly selected system requirements and also do a proper/thorough flushing of your exisitng pipings.


Best Regards,

Jason Tham

Hi, greetings to all,

Great forum!! hoping that I could get some advice from our bros from here. TIA.

Currently, my 10 old daikin system 4 (R22) is beyong repair as daikin quoted abt 2k in repairing. All my pipings (tested no leak) and wirings are concealed, now wana consider to change MIt R410.

1) I came to know Mit Elec MXY-4A28VA have this call "clearing free, pipe reuse" technology, dont what it is? but sound like it could just reuse the old pipes without special flushing/treatment, would some guru advise me?

2) I am also considering Mit HI SCM80zj system4 that quoted cheaper by abt $200 as compared to above, but did not mention the "pipe reuse" technology.

3) the aircond servicing technician told me, just vacum the piping will do, which i feel very uncomfortable with the remarks.

When google for the information, some said pipes need flusing with nitogen, I confused liao. would appreciate very much if any one could share.
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Old 06-12-2013, 07:32 PM   #3986
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Hi Jason,

Thank you so much for your professional views, your advice has enlightened me on the technical aspect.

I too, would like to change all the pipes, because the discount given by the installer for using back old piping is not significant, however, the process will be a messy once, as it involves dismantling almost all the false ceiling.

After considering, I will take the risk to use back the old piping for ME, and inform the installer to flush the pipes.

1) BTW, what is "Pump-down process" ?
2) About how much will it cost (just indicative) to flush the piping with nitrogen? and
3) Would you share your experiences of old pipes failure (in term of %) for changing R22 to R410 you have encountered?

Regards and my apology for my ignorance.

Last edited by tspt88; 06-12-2013 at 07:55 PM..
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Old 06-12-2013, 08:44 PM   #3987
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Hi Jason,

Thank you so much for your professional views, your advice has enlightened me on the technical aspect.

I too, would like to change all the pipes, because the discount given by the installer for using back old piping is not significant, however, the process will be a messy once, as it involves dismantling almost all the false ceiling.

After considering, I will take the risk to use back the old piping for ME, and inform the installer to flush the pipes.

1) BTW, what is "Pump-down process" ?
2) About how much will it cost (just indicative) to flush the piping with nitrogen? and
3) Would you share your experiences of old pipes failure (in term of %) for changing R22 to R410 you have encountered?

Regards and my apology for my ignorance.
Why u want to using back the old piping ?
Are your old piping concealed ?
410A gas model air con need to us 22 gauge piping by agent . ( if not air con got any gas leaking agent don't give any warranty )
After 2-3 year your old piping sure can t take it . coz 10 year also not must contractor using 22 gauge piping.


Don't take the risk
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Last edited by mrairc; 06-12-2013 at 08:47 PM..
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Old 06-12-2013, 10:04 PM   #3988
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Hello Tspt88,

1) Pump down process is whereby the gas in your existing system is drawn back into the compressor. The compressor has this function whereby it can draw the existing gas in the pipes back to the compressor. After the draw back is completed, the outdoor condenser can be disconnected and the flushing and vacuuming can be performed.

This is only possible when the compressor is functioning. For scenerios whereby the compressor is no longer functioning, a gas recovery machine will come into play. This machine works in the same manner by drawing gas from the pipes however instead of storing the gas in the compressor, an empty cylinder is used for containment.

Of course there will be some that will release the R22 back into the air however this is not encouraged as HCFC is harmful to the environment.

As for point 2 and 3, let me drop you a PM instead.

Best Regards,

Jason Tham


Hi Jason,

Thank you so much for your professional views, your advice has enlightened me on the technical aspect.

I too, would like to change all the pipes, because the discount given by the installer for using back old piping is not significant, however, the process will be a messy once, as it involves dismantling almost all the false ceiling.

After considering, I will take the risk to use back the old piping for ME, and inform the installer to flush the pipes.

1) BTW, what is "Pump-down process" ?
2) About how much will it cost (just indicative) to flush the piping with nitrogen? and
3) Would you share your experiences of old pipes failure (in term of %) for changing R22 to R410 you have encountered?

Regards and my apology for my ignorance.
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Old 07-12-2013, 12:49 AM   #3989
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Hi Jason,

wow... your respond is fast , appreciate your efforts of explaining the pump-down process. thank you!! thank you!!
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Old 07-12-2013, 01:59 AM   #3990
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Why u want to using back the old piping ?
Are your old piping concealed ?
410A gas model air con need to us 22 gauge piping by agent . ( if not air con got any gas leaking agent don't give any warranty )
After 2-3 year your old piping sure can t take it . coz 10 year also not must contractor using 22 gauge piping.


Don't take the risk
Hi Mrairc,

Yes, my is a condo, all the pipes are concealed, that is why I resist to change the old piping. If renew piping, the false ceilings will need to be cut or dismantled, and ....the reinstatement as well . Moreover, if the new installed piping not perfectly done, it will be a nightmare to reopen the ceiling....

Considering my existing piping were well done by the main building contractor, which 10 over years still service me well without problem, that make me thinking of retaining the old pipes.

You hit the right spot of my heart that is what I worry most if the old pipes will to give problem in just a few years due to the additional pressure induced by R410.

if this problem is concern, will it be better for me to use back Daikin system like 4MKD75 that uses R22 with the old piping?

TIA.
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