Would like to know how many horsepower needed for my living + dining area.

The aircon location is at dining and currently I've ordered Panasonic non-inverter 1.5hp only, which I'm worry might be not enough..

Area: 24ft x 14ft x 9ft (2 ppls at most of the time, living facing west & lake which I think during afternoon - evening generate quite lots of heat.)
Entrance -> Dining -> Living.

I'm thinking whether should I change it to 2.0hp, need sifus here to give comments.

Thanks!!

kimsim cable wire for aircon 3 wires 2*1.5 enough?

2x1.5 meter ?

mm lah........ ....keke

yes, certain aircond has a feedback sensor cable to the compressor and there will be 4 cables, if it is not done during installation, you might need to hack the wall and get the cables out and put in another cable

so best way is to find the feedback sensor from indoor unit only such as Panasonic or Daikin

for your living room, you can still go for 2.5hp, but the installer must know how to connect the copper hose to the smaller concealed hose

regarding the refrigerant R410A, is that special requirement on the piping (if I'm not going to use inverter aircon)?

I've asked so many times to the management office & project office of my new condo, no one can give me clear answer whether the pipe installed is able to cope with R410A aircon.

I read over the internet it seems R410A will output higher pressure to the pipe so if the piping is not strong enough that will cause leaking issue?

struggling now whether to get a R410A aircon and hopefully someone here can help me on that.

Anyway just asking around the block new neighbors and see they had done the Aircon already, otherwise you need Aircon man come on site and check for u

I use 2 wire cable type for my aircon r22 no problem

Just inverter on DC voltage more sensitive only.
Wire do not connected at half way.. The issue would be few months later

Sadly to say, most condo still come with concealed R22 piping, as far as I encountered.
So high probability yours one may be for R22.

It is not some "special piping" but thicker.

If the piping is catered for R22, then advisable to install R22 air-cond, if not remove it, or install a new piping.

Get installer to inspect the piping if cannot confirm the piping type.

This post has been edited by cherroy: Jun 24 2015, 05:46 PM

no issue at all for my toshiba and daikin lor

You saw them connected wires meh?

If wire too short just back to back, where got such thing

Instead the installer ask me to ask management, more accurate. Then management ask me to ask installer.. very bagus....

You are lucky not to hire this kind of installer.
Experienced installer should able to identify it easily through visibly and measurement of the pipe.

Management office only doing admin work on building management, they generally do not know technical stuff one.
You are better off to ask the developer engineer instead of management office personnel.

No, I'm not lucky. Coz I already made full payment to the shop for the R22 model. Anyway I just called to the developer engineer office and they will revert to me tomorrow. If they confirm R410A can be used then I'll change the model.

Grade (or gauge): thickness of the copper pipe, generally a thicker copper pipe is able to withstand a higher operating pressure. The grade varies from the lowest SWG (standard working gauge) or G25 (0.51mm) to G21 (thickest). For inverter owners, the G23 (0.61mm) is usually recommended. If you have concealed piping, then G22 (0.71mm) is a better option. Another thing you should take note is the bending of the copper piping. To lower the odds of condensation or poor refrigerant flow (which will make the air-conditioner less cold), make sure that the piping is bent with a proper pipe bender (thus ensuring a pipe bent of about 90 degrees).

Developer engineer office has reverted to me that it can use R410A, then neightbour said he bring "aircon expert" to see the piping cannot use R410A.

Memang headache.

If the piping are new, you can always use R410A in R22 piping, the problem will not arise immediately, it will take a few years before the pipe burst and you can change new piping by then

The problem is R410A has higher pressure gas comparing with R22 thus it will make the piping crack if the wall of the pipe is less than 0.6mm.

If you cut the insulator out, you can see the thickness of the copper pipe printed on. Best is check it yourself

Can use is one matter.
While the pipe is purposely cater for R410a spec is another matter.

You don't ask the engineer can use or not.
You ask what is the spec of the pipe.

What spec should I concern on? The thickness of the pipe?