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 Aircon Discussion V3, Home Appliance

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SUSadvocado
post Jan 1 2018, 08:17 AM

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QUOTE(pjpeople @ Jan 1 2018, 02:23 AM)
LG AirCon or Panasonic AirCon Better?
For compressor, LG offer 10 years warranty and Panasonic 5 years warranty.
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Panasonic i hear people talking about reliability issue.

LG is ok, but the shopkeepers keep telling me that Korean Inverters are rather sensitive, so ensure your house power supply voltage is stable.

i'm looking at the LG with mosquito away function.
SUSadvocado
post Jan 1 2018, 08:20 AM

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QUOTE(halcyon27 @ Dec 31 2017, 10:33 AM)
Not all AC installers do that at least not those I use. Doesn't make sense also.
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just wondering. does the pipe & cable have to run from a hole behind the indoor unit, or is it possible for the pipe & cable to run on the same wall the indoor unit is sitting on so i can route them directly upwards on the same wall?

i know if do this means there needs to be more space between the indoor unit & the wall?

also by doing so the bend upwards would be sharper & very short due to clearance between indoor unit & wall?

reason doing so is i want to run the pipes higher so it can be hidden with plaster, if only go upwards after tru the hole there will be 1 section that cannot be covered due to being too low (close to height of door frame).
SUSadvocado
post Jan 1 2018, 09:31 AM

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QUOTE(halcyon27 @ Jan 1 2018, 09:24 AM)
What you suggest is fine although bending the pipe upwards must be within the installation manual and kink free. The part outside can be hidden in a PVC casement. This is prevalent in SG and over here. Even if it's above the door you can run the pipes and electrical ok the side with greater clearance. Otherwise create a false box 8" deep above the door and have the AC mount on the false box with a 6" rectangular man hole for the pipes.

What you suggested is great as it means you're taking the precaution to ensure that it's not accidentally drilled into.

A friend had an a ex-colleague with a dud AC. Everything was never used at all as it is unusable because the indoor cable was drilled where they extended a wall to make way for a storage room as an after thought (very dangerous esp in situations like this). The AC was never used since day 1 for decades because it would be messy to hack the wall and not to mention take out and redo the partition. Complicating matters that dissuaded them to rectify was that the affected AC compressor is not located on the same floor.
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___|
|__| Wall

hi, i mean something like above, the pipe & cable straight go up on the same wall the Indoor is sitting, is there enough clearance between the Indoor & Wall for the pipe & cable? from my observation most indoor units are kissing to the wall and no gaps between wall & AC.

because if i go tru the hole 1st 1 unit will need to to a U-Turn, the other will end up with a section exposed as it's near the door frame (it's still indoor so using a pipe casing will still look ugly and it's too low to hide in plaster).

i'm not fancy false box though it was recommended i don't like the idea of the Indoor unit hanging onto the plaster box instead of wall. even though the indoor unit is less than 10kg i don't believe plaster box are designed to hold onto weight more than 2kg. it also makes the AC unit protruding from the rest of the wall.

This post has been edited by advocado: Jan 1 2018, 09:34 AM
SUSadvocado
post Jan 3 2018, 05:29 PM

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anyone know where i can get stainless steel support bracket for compressors?
SUSadvocado
post Jan 3 2018, 08:09 PM

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QUOTE(halcyon27 @ Dec 30 2017, 02:06 PM)
If you're in PJ, Kelana Jaya Allco Parts or SS2 Sri Siam row or Paramount (where Wong lighting and Giant is) intersection traffic light turning right on the way downslope towards the junction where the mosque is there's one on the row of shops (amidst lots of electrical supply and curtain shop) on the left before the Caltex station.

Might as well try one jacket per pipe.
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bro, forgot if i asked this question, but are pipe bender standard for 1hp & 1.5hp (0.6mm-0.8mm) or do they require 2 different sets? and Inaba pipe are glued together so you will need to bend them together?


same question for flaring tool, do they need dedicated tool or the same tool irregardless pipe thickness?

just wondering how your contractor did it last time.
SUSadvocado
post Jan 3 2018, 09:35 PM

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QUOTE(VeeJay @ Jan 3 2018, 09:33 PM)
I think its gonna be expensive, if its gonna withstand the weight. Like for those auto gates, etc, are not heavy duty and hollow inside. Solid SS, gonna cost much higher.

There are couple of fabricators at sg buloh, could check it out there.
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the standard brackets are like 2 pieces of flat metal welded together to L shape, so if stainless steel it's always tube like either hollow or solid? there is not Stainless Steel plates?
SUSadvocado
post Jan 3 2018, 09:45 PM

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QUOTE(halcyon27 @ Jan 3 2018, 09:38 PM)
I didn't observe as I was working whilst they installed at my home. Search and see. A Paircoil is soft enough to bend together but if it's bent to do a u turn, I think the tool I linked in the your AC thread may come in handy.
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ah i overlooked the link can you repost? you did mention bend with hand before just wondering how to do it safe.

also about the flaring tool, is it standard tool for 1hp & 2hp irregardless of pipe thickness?

also if the pipe length is long (but still within AC limit), do we need to add more refrigerant or any extra stuff or things like pump to be installed?

btw do you know how to do vacuum test on installed pipe? what do we need?

This post has been edited by advocado: Jan 3 2018, 09:49 PM
SUSadvocado
post Jan 3 2018, 10:27 PM

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can someone clarify for AC wiring not recommended using multicore cables as it will cause voltage instability, as claimed by this vendor?

https://www.11street.my/productdetail/york-...hp-air-52009316

it's written under "specification":

Product Installation Work Details

Premium quality materials inclusive of;

1) Up to 8ft of Copper pipe with 0.61mm thickness (the best copper pipe in market)
2) Insulation with 6mm thickness (the best insulation in market)
3) 2.5mm SIRIM-certified wiring (not 3 core wiring because it will cause instability in the incoming voltages for air conditioner)
SUSadvocado
post Jan 3 2018, 11:16 PM

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QUOTE(halcyon27 @ Jan 3 2018, 10:54 PM)
Bend with hand is possible with paircoil but not to the extent of u turn without specialise tool. Just go to your control panel and search for your topics will do.

Wah...😁 you look me too up (over estimated my abilities). I'm just an informed user not an AC installer. I'm not sure about the tools. The flaring nut depends on the pipe sizes. The manual will state what to use. Best is to leave that to the installer.

Pre-charged length stated in spec and top up rate per extra length all in installation manual.
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somebody mention about vacuum pump during installation do you know what it is for?

so you don't know how they do vacuum test?

i got watch youtube how to do flaring but i don't know the tool is standard just use different head for different pipe?

1 important question i forgot to ask, the copper pipe run, does it have to be exact length, cannot leave extra length to be safe like wires?
SUSadvocado
post Jan 4 2018, 12:04 AM

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QUOTE(halcyon27 @ Jan 4 2018, 12:00 AM)
I've mention what it's for and described it briefly how it's done. The installer is the who carries it out.
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yes you mention pressure test. close 1 end of pipe and pump air into the pipe and close off the end come back in 1 week to test the pressure.

but i asked the installer they say now they are doing vacuum test and it's only 5 minutes. so i was wondering how they do it actually.

also regarding the copper length, must be exact length or can i leave some excess length just to be safe like how electricians leave some longer wires just in case?
SUSadvocado
post Jan 5 2018, 10:30 PM

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QUOTE(toonny @ Dec 29 2017, 02:05 PM)
Most likely is separate. I just bought a 2.5HP unit and opted self-collection at the warehouse.
A 1hp unit should be able to fit into sedan car as like what Halcyon mentioned.
[attachmentid=9468393]
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need help with anyone owning 1hp & 1.5hp modern inverter AC.

Can you folks help me measure the distance for the compressors bottom mount legs, the distance between the front bolt hole & the rear hole? something like Wheel Base of a car but hole to hole (end to end of hole). also are they open ended (meaning the holes looks like a U open ended or are they closed ended "O")

I need the measurements to make sure the brackets bottom mounting hole locations can fit the compressor's track.
SUSadvocado
post Jan 7 2018, 09:05 AM

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QUOTE(IvanWong1989 @ Jan 6 2018, 11:30 PM)
Hi All,,

Just a question regarding Panasonic Aircond(nothing fancy, just most basic non inverter).

When you guys on the aircond(from remote control, press On, mode is Cool, fan auto, temp 20c)
Does the blower(the indoor fac) immediately start? Or did it take like, 10s before the thing start to move. Meanwhile outdoor unit may have started
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i have a Panasonic non-inverter but not sure what model you using got air right after i turn it on.

have you tried putting the fan on manual instead to see if same thing happens?

10s is way too long.

when you say outdoor may have started means you not sure? can hear the sound esp start up sound is louder if just behind a wall.
SUSadvocado
post Feb 4 2018, 11:04 PM

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QUOTE(glauncher @ Feb 4 2018, 09:34 PM)
Hi all,  newbie never used aircond at home b4.

any possible issue/disadvantage if i buy online and find installer myself?

like claiming warranty or more expensive installation?

Thanks
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online pros: cheaper, more choices

cons: delivery charge or self pickup, warranty direct lias with manufacturer.

installation generally standard whether you use shop contractors or find outside contractors.

to find outside contractors just go to aircon shop (not those selling aircon but those repair/install). price is standard and starts with 10ft copper. usually around rm200-250.

just make sure you have everything (copper pipe +insulator/wires/power switch/brackets/drain pipes) included. if you don't have AC before, chances are the installer gonna tap power from existing 13A socket, which is not a good choice. best is run dedicated 4mm2 wires from DB using 20A MCB to a 20A switch. but that would add more cost. and for inverter AC you need 4 wires from indoor blower to compressor.

also request the wires not to be wrapped together with copper pipe inside insulator. this may cause condensation in the wires and problems.
SUSadvocado
post Feb 4 2018, 11:08 PM

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QUOTE(dkxinj7 @ Jan 28 2018, 11:26 AM)
Hi guys, I'm currently in the midst of installing
2.5hp for hall
1.5hp for master bedroom
1.0hp for small room

Still hesitating between Daikin and LG (all inverter)

I have heard of the recent LG inverter series seem to have a much higher power saving capability than Daikin inverter series.

All the sifu and otai please advise me
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how big is your hall? 2.5hp, quite big.

1.5hp is also quite big for master bedroom. if you have a ceiling or table fan 1.0 should be enough.

Daikin, LG, Mitsubishi Electric, Sharp are the better brands.

LG has the mosquito away tech. Sharp air also purifier have but not the AC.

in terms of function, Sharp has more at affordable price but power consumption is higher. Daikin, LG is on premium price. Mitsubishi Electric has the smallest compressor if space is an issue.
SUSadvocado
post Feb 5 2018, 06:09 PM

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QUOTE(ran_deep @ Feb 5 2018, 04:49 PM)
I contacted one supplier, and they said the R32 gas models are latest and much more saving. The gas is also cheaper than R410A.

But when I contacted my usual technician, he claims not many use R32 hence its much more expensive.

Also the same piping (0.6mm) is applicable to R32A rite?
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R32 is very new, it's more efficient but each brand only have like 1 R32 model.

R32 is more flammable than R410A, i doubt R32 gas is cheaper because less demand + new gas = higher cost.

if you have existing AC using R410A just follow to avoid confusion next time service.

but R32 model quite nice, the design. got glowing lights.

same piping in terms of diameter yes follow R410A (but check the specs). thickness, up to you. you want less problem go with 0.7mm or 0.8mm thickness. but installers will laugh at you but say easier for them to do their job.
SUSadvocado
post Feb 6 2018, 09:45 PM

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QUOTE(vampire411 @ Feb 6 2018, 05:36 PM)
Hi guys,

Wanted to ask, my new condo, it already has AC point dedicated plug, there is a place dedicated for compressor just outside where i should install my AC but it didnt have any hole for copper wire, should be ask a third party to come and drill a hole before i ask a aircond guy come for installation? or the aircond guy should know what to do?
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get aircon contractor, they will use rotary drill to hack holes. you want to conceal the pipes also can. copper pipe standard charge 1st 10ft around rm200-250 then per ft charge.

make sure you tell them exactly what you need (drill hole/conceal/new power point/new drain pipe/4 wires) etc. if hack, they might not want to cement back then you have to get indon worker to do...
SUSadvocado
post Feb 6 2018, 09:50 PM

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QUOTE(slimey @ Feb 5 2018, 07:21 PM)
r32 and r410a have the same pressure temperature curve.
so operating pressure is the same, so same thickness.
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there are 2 things, pipe size & thickness. 1 is fixed the other isn't.

the pipe size is decided by manufacturer even though you can say 1hp is 1 size, 1.5hp-2hp another size. the size cannot be changed.

pipe thickness is not standard. minimum is 0.6mm, but you can go 0.7 0.8 or 0.9 or even thicker as long contractors can bend them.

you can't use 1hp pipe on 2hp aircon, but you can use 0.6mm or 1mm thick pipe for 1hp pipe size.

if the pipe run involves lots of conceal and long run i would suggest get at least 0.7mm thick. but good luck finding contractors willing to quote it cheap.
SUSadvocado
post Feb 9 2018, 09:48 PM

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just install 2 AC. if 1 not enough turn on both. 1 AC won't be able to cover both areas efficiently.

install 1 1.5hp AC 1st but do piping for both AC. then test if the 1.5hp is enough. if enough get another 1.5hp for 2nd unit. if not enough, get a 2hp for 2nd unit.

having 2 AC is good anyway. you can switch between 2 AC to reduce their load.
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post Feb 9 2018, 09:51 PM

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QUOTE(GC 2014 @ Feb 7 2018, 06:12 PM)
when doing the conceil piping for aircond, normally we complete install with the aircond unit only start painting or the other way ?
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install piping & wiring & drain -> patch walls, install any plaster ceiling -> paint -> install AC.

if you install AC then paint, some areas will be hard to paint like near edges, or you end up getting paints on the AC units. which no problem can use thinner to clean the paint like some genius here says it.
SUSadvocado
post Feb 16 2018, 09:53 AM

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QUOTE(Vio @ Feb 15 2018, 03:42 PM)
hi guys, need some suggestions, currently, the place that im moving in has 1x mitsu, 2x midea aircond installed in the rooms,

should i get it changed to the newer models that is more power savings (those with 5-star rated ones)?
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Check if existing wire and pipe can support or not. We don't know how old ur ac.

If only 3 wires, inverter needs 4. So you can sacrifice the earth cable though not recommended.

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