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Air conditioning - Any recommendations please??

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Old 18-07-2012, 04:20 PM   #2956
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As above... looking into air conditioning 3 bedrooms and the living room.. my contractor quoted me $3.7k for a 4:1(2 compressors inside) toshiba system with inverter.

is it expensive?

any lobang/recommendations?

is daikin or mitsubishi better?

Try to look for energy savings aircon unit with the tick sign.

No matter how good is your aircon system it is still important to service your unit and condenser to maintain good working condition.

Check out this article to know more about aircon condenser.
Do We Need to Service Our Air-con Condenser?
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Old 19-07-2012, 01:23 AM   #2957
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To Printy,

I do not suggest Samsung aircon.
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Old 19-07-2012, 11:10 AM   #2958
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Anybody installed aircon back in 2010 June? Are your systems still working fine today?
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Old 19-07-2012, 01:44 PM   #2959
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Anybody installed aircon back in 2010 June? Are your systems still working fine today?
Ermm.. 2010 June till now is 2 yrs only.. so fast got problem?
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Old 19-07-2012, 10:53 PM   #2960
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Ermm.. 2010 June till now is 2 yrs only.. so fast got problem?
Yeah... 2 rooms out of 3 is without aircon. Seems that the electrical wiring has some defects. Now has to spend time/$$$ to change the electrical wiring.

Headache is some of the trunking is concealed.
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Old 23-07-2012, 06:02 PM   #2961
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Anyone recommend me a good company to buy PanasonIc air con? Need experienced n reliable ppl for installations.

Thanks
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Old 23-07-2012, 08:24 PM   #2962
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Hi Terumo
Can recommend aircon model and make for sys 4?
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Old 23-07-2012, 10:06 PM   #2963
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I just got a quote for a System 3 Panasonic at $1870.

Is that cheap?? Its replacing my old unit..Just change the compressor and blower unit.. Rest retain..

So good deal?
mind sharing where you got the quote from? Gain City quoted me 2.7k for a 3 split inverter system and they mentioned this is promo price.
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Old 23-07-2012, 10:06 PM   #2964
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Yes .... Was quoted 1870 for 3 unit and compresser cheap?
mind sharing where you got the quote from? Gain City quoted me 2.7k for a 3 split inverter system and they mentioned this is promo price.
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Old 24-07-2012, 11:12 AM   #2965
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Any suggestion/recommendation?

Hi everyone,

My existing setup is 3-bdrm aircond running all at the same time at night. Using Mit Starmex with 38,000btu. Main bdrm is 12k FCU & 2 other smaller bdrm is 9k FCUs. The isolator allows 20amps.

Now, the Main bdrm is not cold. The Main bdrm size is about 3.5m x 6m. Base on this size, an estimate calculation come to (3.5 x 6 x 650 = 13,650btu), initially thought that the 12k FCU will be good enough.
Question 1: Did I under-estimate the cooling capacity of the Main bdrm FCU?

But through various setting, example, selecting the room temperature on the remote control all the way down to 16 deg C, but can only achieve 24 to 25 deg C. Room temperature did reach 23 deg C once on a night that was raining.
Question 2: Could this be due to low refrigant in the compressor? How can we check or need to specialist to check. Any recommendation or contacts?

The other 2 bdrms do not have any problem with the temperature setting, one being set at 24 deg C & other at 26 deg C. Both occupants said that their rooms are cold enough. Both these bdrms are halve the size of the Main bdrm.
Question 3: Could the setting of the other 2 bdrms cause the compressor output to reduce and affect the Main bdrm cooling? Could it be that the is some cross wiring or cross connection of the piping?

I do not think it is the Outdoor unit that is not able to achieve the cooling, but rather is the Main bdrm FCU too "small"? I am hoping that the room temperature can come down to about 21-22 deg C.
Now, I want to "upgrade" the Main bdrm FCU to either 18k or 24k FCU (prefer 24k FCU). But I understand that the existing pipe size will need to change as well.
Question 4: Will this help with the cooling requirement? Will using the 24k FCU now affect the 2 smaller bedrms cooling capacity?


So, now I have the following 2 options and am hoping that anyone can help to advise:

1. I am thinking of replacing my existing piping, which are mostly "hidden" in the false ceiling. This will require the false ceiling to be cut open or some portion of the false ceiling remove for access to the exisitng piping.
Question 5: Not sure if any aircond installer does this "cutting" and re-patching of the false ceiling. This is the tricky part as my previous aircond installer advised that it is very difficult to be done. So I am hoping that if any of you have any contacts of aircond installer have the skill & resources + willing to do this "extra" job, pls pm me. Thks.

2. Alternative, if not able to get the aircond installer willing to "cut" false ceiling, then will need to run the piping+trunking outside and along the false ceiling, of cos this will not look good but may be good enough for the interim until re-renovate the house again. Also, some length of the "old" pipe may need to remove to free up the space within for the new piping, so that there will not be 2 trucking running next to each other.
Question 6: So, if you know of any aircond installer that have done similar job or willing to at least do this, pls do pm me.

Preferably, if the aircond installer can come by my place and view the existing setup, he may then be able to provide a better advise and recommendation? For info, if can come by on Saturday or weekdays evening, it will help alot. The actual work will be on weekdays only, between 9am to 5pm.

Sorry for the lenghty writing. Thanks for reading and in advance for any advise/inputs.
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Old 24-07-2012, 06:42 PM   #2966
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To ulupandan,
How old is ur existing MIT aircon?

Factor of 650 is quite high for btu conversion, 500 should be enough.
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Old 24-07-2012, 06:43 PM   #2967
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To localgod,
Can consider MIT electric 4a28 or Daikin 4mkd75.
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Old 25-07-2012, 08:57 AM   #2968
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Hi terumo, my MIT is about 1-month old...

Looks like I'd used the wrong figure in my estimation, so with this current FCU (I think the model is 13va for the Main bdrm [12k btu?]) works out as = 3.5 x 6 x 500 = 10,500 btu, seems like this FCU should be enough.

But, again "trial" last night, with remote control setting at 16 deg C + Fan = Auto (3-circle symbol) + Vane = Auto (also 3-circle symbol), check the temperature in the morning was reading 24 deg C.

I also did a "trial" on one of the smaller bdrm last night, just running one AirCond for that one-room with temperature set to 16 deg C + Fan set at Auto + Vane set at Auto, I found out that in slighly less than 45-minutes, the room temperature has come down from 28 deg C to 21 deg C.

A shorter "Trial" was also done for the 3rd bdrm, with the same setting as the 2nd bdrm, temperature come down from 28 deg C to 24 deg C in about 15-minutes.

Any one can advise?

Thanks in advance.

To ulupandan,
How old is ur existing MIT aircon?

Factor of 650 is quite high for btu conversion, 500 should be enough.
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Old 25-07-2012, 10:41 AM   #2969
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To ulupandan,

Since its under warranty, get ME guys to come and check.
I suspect,
expansion valve faulty, or cross wiring or piping or bent piping.
Just my guess...

If u on your master room one unit alone and off the other 2. Is it cold?

Last edited by terumo; 25-07-2012 at 10:42 AM.. Reason: Typo
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Old 25-07-2012, 04:50 PM   #2970
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Hi terumo,

I did try the Main bdrm alone with remote control setting at 16 deg C + Fan = Auto + Vane = Auto. But room temperature come down from 28 deg C to about 26 deg C after about 45-minutes. Kinda long but I thought that was due to the bigger room size. And if run the AC from night till morning, lowest temperature seems is 24-25 deg C.

Also, will the ME guys able to tell if the wire or piping is cross or bent? Do they use some test equipment to identify these problem? My worries is that they may want to put the blame on something else by using these as the cause of the problem, and as I am not able to "open" and check the pipes to see if it is bent nor do I have the equipment to test whether if the wire or pipe is cross connected...

Okay, I will get the ME guys to check out the system.

Thank you for the pointers. Will ask them to look into these as well. I hope that these problems will be easy to be fix.

To ulupandan,

Since its under warranty, get ME guys to come and check.
I suspect,
expansion valve faulty, or cross wiring or piping or bent piping.
Just my guess...

If u on your master room one unit alone and off the other 2. Is it cold?
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