Older copper pipes esp those extant before 1995 should be ok as their quality are much higher grade but just that the safety margin is much less due to thinner walls. But if redoing and willing to hack get good insulated pipes.

Did I say that? AC Pipes are almost pure copper. Brass is meant for water plumbing fixtures.

This post has been edited by halcyon27: Oct 11 2017, 12:30 PM

sorry i mean brass. so all ac old or new all use brass copper, the difference is whether the diameter & thickness meets the requirement?

so the pipe follows gas used whether inverter or non-inverter right?

I think you're confusing yourself. AC piping use almost pure copper. In certain countries Aluminium is available but needs specialised fitting tools. Brass is an alloy of copper and zinc mostly with lead and tin forming the trace and its used for plumbing like stop cocks, water taps, etc.

Thickness is a safety factor to withstand operating pressure imposed by the refrigerant. R32 and R410a operates at 1.7/1.6 times higher than R22 respectively. For better peace of mind use pipes rated for R410a unless hacking and replacement is cost prohibitive and impractical. In that case if the pipes are installed before 1995, the previous AC suffered no blowout, vacuum clean, pressure seal test (2 weeks) and if ok you may reuse. But here, most likely the insulation covers both pipes. The proper way is to insulate each pipe individually.

Inverter refers to the mechanism by which a motor operates. They are variable rather than fixed frequency. See the YouTube above.

This post has been edited by halcyon27: Oct 11 2017, 03:54 PM

To be safe, a thicker pipe offers a better safety margin. Not wrong to use the thin ones. Don't stinge on piping and insulation. I've pm-ed you a contact.

This post has been edited by halcyon27: Oct 11 2017, 04:22 PM

Hi everyone... I am having issues with my daikin 1.5hp. I got swindled by the installer as he used the wrong piping and undersize electrical wiring... he used 1hp specs for my aircon.

Can anyone recommend a good installer who can reinstall my aircon.. it has been 7 months and the warranty only covers the condenser and parts.. they asked me to call back the original installer but the guy claims there's nothing he can do.

Would really appreciate your feedback.

Thanks

Thanks buddy, got the ones I need from a friend who is renovating his place. Sorted your a life savior

From the field.

Is it normal for my Panasonic ac (econavy, inverter with iauto x) turns on 1 hour before the timer set for it to turn on ( set timer on 7pm, turn on and off at 6pm) for a few seconds and then turns off
This is the ac model


This post has been edited by yongtjunkit: Oct 13 2017, 06:56 PM

What does the manual say? But why your timing so weird? It sounds like it's to be on for 23 hours?

The timer is for it to be on for bedtime to make sure that the room is cold, will turn it off the next morning

This post has been edited by yongtjunkit: Oct 13 2017, 10:14 PM

Perhaps to precool the room or heat up the refrigerant. I think you meant to write 7pm-6am? Otherwise 7pm-6pm sounds long.

This post has been edited by halcyon27: Oct 13 2017, 10:32 PM

I set the timer on 8pm.. I turn it off manually.(In the morning)

But I noticed that 1 hour before the timer set turns the ac on, it turns on for a few seconds then turns off.

This post has been edited by yongtjunkit: Oct 13 2017, 10:37 PM

Dear sifu,

I'm wondering, which brand should I buy:

1. YORK 1.5HP Inverter Air Conditioner YWM5J13AAS-W/YSL5J13AAS = RM 1,343.00 (Shopee)
2. TOSHIBA Inverter Aircond 1.5HP RAS-H13BKCV-M = RM 1,399.00 (Shopee)
3. Panasonic 1.5hp Premium Inverter + Econavi + Nanoe-G Air Conditioner CS/CUS13TKH = RM 1,675.00 (11street)

Which one is the best in terms of nationwide warranty, maintenance (spare part etc) and energy consumption?

I do prefer the York model due to new model is really attractive (LED DISPLAY TEMPERATURE) which is so nice for me.

But some shop (I went there juz to ask for their advice before making online purchase) said that Toshiba/Panasonic is much better than York brand.. York new model (inverter) easily got broken and spare part is hard to find & quite expensive..is it true?

Panasonic got the highest price but higher price doesnt means best quality, am I right sifu?

Which brand do u prefer dear sifu?

//I do prefer purchasing online due to the best price offered. but first I have to get certain which brand should I buy..

Thanks dear sifu...

This post has been edited by mdsn: Oct 15 2017, 09:08 PM

Is Sharp inverter a reliable model? What about parts availability and price? How does Sharp compare to Daikin or Panasonic?

my 5 yr old panasonic inverter 2HP cs-s18nkh (bedroom 10-hr daily use) no longer cooling everytime after 1hr running. The compressor shutsdown even though the indoor unit still running.

authorized panasonic technician already troubleshoot; replaced sensor and pcb (based on error code).. still same problem. So next suspected the outdoor unit (pcb or compressor), but did not proceed with repair because above RM500 cost. Have to say parts are readily available, but didnt expect such costly repair before 10yrs

Plan to get daikin as replacement. Disappointed with panasonic, expected it to last longer than 5yrs (ngam2 compressor warranty period). I still have 2 units Panasonic non-inverters (in living room, seldom use), but no more Panasonic for me

This post has been edited by gp2stroker: Oct 16 2017, 10:33 AM

Just like few posts above, I am wondering what brand of air-cond is considered reliable these days though I understand people would have to buy and use them for a considerable period say >5 years before they can share their experience. I have been using York air-conditioners for most part of my life. In my current house, the York air-conditioners (5 units) are still working good after 12 years. One unit, also York, was removed from an older house and installed in the current house and it's now 25 years. Surprisingly it's also still working without any breakdown or change of spare parts etc. Just the normal servicing only.

It's now 2017 and I was reading some responses here reporting breakdowns. Any thoughts or experience on the brands that are reliable (no breakdowns) and brands that are not so reliable? I'm only interested in the old-school non-inverters.

Thanks.

I would take Panasonic out and put in Sharp AHXP12aaa where aaa=SHV1 (2015-line up) or UHD (2017 line up). Toshiba, see RAS-13N3KCV.

Toshiba pioneered inverter and air purification from which all other AC manufacturer were influenced one way or another. Sharp is a hidden jewel in terms of healthy air delivery with their gentle cool feature. The new Johnson Controls acquired York inherited Hitachi technology (through their later acquisition) with York marketing and local distributor network. I kinda like the new York line-up having seen it in use. My personal preference is towards the Sharp for it's Plasmacluster and clean feature where after use, it redirects the Plasmacluster to rid the cooling fins and drain of mould. The indirect cooling
(Gentle or Coanda cool) feature is best combined with ceiling fan such that 28°C AUTO and 2 speed ceiling fan can simulate as if it's 26°C. Healthier for kids and elderly parents.

This post has been edited by halcyon27: Oct 16 2017, 03:19 PM

Only if i have seen halcyon thread much more earlier, my a/C pipes, big and small are wrapped in one black insulation loosely, that's pretty common everywhere...

Can redo if you want esp if AC is placed near above window and compressor is outdoor. Fastest way is to use Insulflex (locally manufactured) if you want to retain piping. Paircoil have to change piping but their pipes are very solid so long as bending is done correctly. Gas capture and refill will cost. Perhaps time this when general servicing is due.

This post has been edited by halcyon27: Oct 16 2017, 07:00 PM

thanks.

unfortunately all are burried inside the wall and ceiling for 2 rooms

can probably redo for my 2hp room. Aircond vendor will know the insuflex right?