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Air conditioning - Any recommendations please??

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Old 22-07-2015, 10:52 AM   #6136
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Not Daikin,.... it's Toshiba (sorry forgot to mention)
Toshiba is quite hard to find parts and also phase out in sg markets already.

Just look at used or 2nd hand Aircon shop will do.
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Old 22-07-2015, 11:33 AM   #6137
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For system 4, I was told 1/2 inch insulator will make the trunking very thick, so 3/8 is preferred, is it true? and does it affect its reliability and performance?

I was also told 22 grade copper pipe although stronger, is very hard to twist, so 23 is actually adequate and preferred, true too?

Am very confused with all the info and where to buy... thanks.
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Old 22-07-2015, 02:48 PM   #6138
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For system 4, I was told 1/2 inch insulator will make the trunking very thick, so 3/8 is preferred, is it true? and does it affect its reliability and performance?

I was also told 22 grade copper pipe although stronger, is very hard to twist, so 23 is actually adequate and preferred, true too?

Am very confused with all the info and where to buy... thanks.
hm... thicker insulator would definitely be better at preventing condensation of the pipes. And it you're using the new 410A refrigerant which uses a higher pressure then a thicker Cu gauge would be better as well. both does add to installation cost. so you'll need to consider that...

paging Terumo for advise...
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Old 22-07-2015, 04:19 PM   #6139
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To thesingingbard,

I heard u...

To zeroboi,

1/2 insulation will make the trunking bigger.
G22 is thicker and harder to twist, this is better in terms of preventing gas leakage.
If the installers are using bender to twist, shouldn't be an issue, unless they are using bare hands.
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Old 22-07-2015, 08:52 PM   #6140
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Hi , normally for aircon quotation , they put 16mm drainage pipe or 16mm drainage pipe with Armaflex , is ther any diff ?
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Old 22-07-2015, 09:17 PM   #6141
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Hi,
My current aircon system was installed by Gain City 12 years with a junction box.
Consist of a system 4 (one outdoor compressor) with 5 indoor units.
They added a so-call Junction Box next to outdoor unit.
Gain City told me my master room unit is linked with my Dining area unit.
And the two bedrooms are linked with my Living area unit.
I should not turn on Living and Dining if all 3 bedrooms unit are running and vice versa.
So if we have visitors or guest , we turn on Living and Dining and don't turn on the bedrooms' units.

Is such Junction Box still avail nowadays and what are disadvantages ?

Cos one aircon guy told me such boxes will cause cooling capacity to be reduced.

Hi Kimsim,
The brand is Toshiba.
I am not thinking of repairing as already 12years old....planning to change to new ME Starmex.

What GainCity did 12years ago works well for me but many people don't mention such junction box or maybe called a distributor.
-- if I run two units in Living and Dining, I just don't turn on any 3bedrooms units.
-- if I run 3bedrooms, I just don't turn on Living+Dining units.
(the box just direct the cooling to the units been turned on first...)

I don't think I will run all 5 indoors at the same time so no point buying Sys5 or Sys3+2.

Does Mit Elec has such distributor box ? ( that means Sys 4 installed with 5 indoors units)

I will take a photo of the distributor box that is with my 12yr old Toshiba compressor and show you guys tomorrow.
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Old 22-07-2015, 09:33 PM   #6142
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Hi Kimsim,
The brand is Toshiba.
I am not thinking of repairing as already 12years old....planning to change to new ME Starmex.

What GainCity did 12years ago works well for me but many people don't mention such junction box or maybe called a distributor.
-- if I run two units in Living and Dining, I just don't turn on any 3bedrooms units.
-- if I run 3bedrooms, I just don't turn on Living+Dining units.
(the box just direct the cooling to the units been turned on first...)

I don't think I will run all 5 indoors at the same time so no point buying Sys5 or Sys3+2.

Does Mit Elec has such distributor box ? ( that means Sys 4 installed with 5 indoors units)

I will take a photo of the distributor box that is with my 12yr old Toshiba compressor and show you guys tomorrow.
Actually you not need what system 5, go with ME Starmex 4A38VA with full load without current limitation should be work well

At least 4A38Va outdoor still made in Japan
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Old 22-07-2015, 09:54 PM   #6143
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Actually you not need what system 5, go with ME Starmex 4A38VA with full load without current limitation should be work well
At least 4A38Va outdoor still made in Japan
You mean 4A38A with four indoors?
3 X GE10VA for three bedrooms and Living/Dining use what size?

One contractor suggested 4A28VA with 3 X GE10VA and GE24VA.

My place is a HDB.
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Old 22-07-2015, 10:02 PM   #6144
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You mean 4A38A with four indoors?
3 X GE10VA for three bedrooms and Living/Dining use what size?

One contractor suggested 4A28VA with 3 X GE10VA and GE24VA.

My place is a HDB.
10x3 + 24 or 26 should be prefect match
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Old 22-07-2015, 10:20 PM   #6145
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10x3 + 24 or 26 should be prefect match

Thks for yr advice.
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Old 23-07-2015, 04:39 AM   #6146
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Toshiba is quite hard to find parts and also phase out in sg markets already.

Just look at used or 2nd hand Aircon shop will do.
If Toshiba ac phase out of sg, meaning Carrier will exit as well?
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Old 23-07-2015, 05:29 AM   #6147
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If Toshiba ac phase out of sg, meaning Carrier will exit as well?
Nowadays still got Carrier Aircon?
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Old 23-07-2015, 10:16 AM   #6148
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Noted with thanks!

By the way, GainCity is the only firm that requires you to upgrade piping to Grade 22 when you upgrade the insulation to 1/2 inch. Cost about $240 for system 4.

To thesingingbard,

I heard u...

To zeroboi,

1/2 insulation will make the trunking bigger.
G22 is thicker and harder to twist, this is better in terms of preventing gas leakage.
If the installers are using bender to twist, shouldn't be an issue, unless they are using bare hands.
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Old 23-07-2015, 03:00 PM   #6149
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maybe need to chemical overhaul the FCU... and (how old yr unit?)
I think it is about 5-6 years already if I not wrong. Brought at Carfouer when they still around in Suntec.

Any quote for a chemical overhaul? Thanks.
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Old 24-07-2015, 10:27 AM   #6150
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Hi LittleBB,

I am also into replacing my old mit non-inverted air con. I have been looking around and I found a quote for a Mit Starmex system 3 for S$2800 including replacing the old piping from STL Air Conditioning. Check out their web site. They provide a link to "BCA Academy of the Built Environment" which contain a list of all qualified air con installers. Impressive, eh!! The Mit starmex has got 2 ticks rating for energy efficiency. I also check out on Dakin Inverter Multi-Split System 3 (R410A) which has a 3 ticks rating which translates to a annual energy cost of S$643 as compare to Mit Starmex of S$1060. Quoted for S$2680.

I am thinking of buying Dakin based of energy rating. Any kind soul out there can give comment whether it is a good choice?? TIA.
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