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Air conditioning - Any recommendations please??

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Old 30-12-2016, 01:04 PM   #9106
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so any good and licensed honest installer to recommend?

Yes, I think this is good advise. Instead of having control over the dealer, ie the seller of the air conditioner who is actually acting just as a middleman, buy it from the installer who you have agreement and control of how you want your system to be installed and within what terms and conditions. It is ok to let the installer earn a little more as he is the one that the reliability of your system depends on, other than the product itself.

If you get it from the dealer, who may squeeze the profit margin of the installer, it is therefore likely that the installer may do short cuts to the way the system is installed.

I did not purchase my system from the dealer. I purchased it from the installer. I had 3 single splits. My first was vacuumed for only 5 mins and the pre-stored gas was released. I was not happy, the person installing it was not happy too as he had to redo it, release all the gas, vacuum it for 15 mins and realized that the manifold gauge reading changes after the vacuum pump was turned off. Confirming that there is leaking somewhere.

It was later found that the manifold gauge hose was leaking. Meaning that the initial 5 mins vacuuming that was done was not able to serve its purpose.

With new manifold gauge, the system was vacuum again for 15 mins and stand for 2 mins for checking the pointer position (whether the pointer moves or not). The gas was recharged into the system and the pressure level recorded by a photo before the system was sealed off. Soap bubbles was used to check all connections at the condenser.

In my opinion, the above can only happened when you deal directly with the installer.

Hope that the above are helpful.
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Old 30-12-2016, 01:05 PM   #9107
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York. Are u comparing materials to materials and FCU capacity to capacity? after i searched through comparing the smaller dealers, i realize gain is very competitive unless u going down to under $100 range.
i have looked into this brand as well, it is from usa. midea is from china
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Old 30-12-2016, 02:06 PM   #9108
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Another way is to change the whole outdoor unit rather then changing all the parts.
The indoor units & piping can remains (if they are of good condition)
Yes,
you are right again,
My wife and I have search about 2 compaines for the outdoor unit, pricing around $1500 and installation about $300 amount to $1800.
The total new whole set including installation is about $3600.
It is about 50% of new price. Not really worth it
My system is only about 3.5 years old, if get back same system and LAST ONLY another 3.5 years. I think it is really really bad bad bad deal.

Further more, we have no confidence and very disappointed with Mitshubishi heavy industrial air con.
I want to share my bad experience with those intend to buy Mitshubishi Heavy industrial air con.
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Old 30-12-2016, 02:17 PM   #9109
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Heard that MHI no good. ME better

Yes,
you are right again,
My wife and I have search about 2 compaines for the outdoor unit, pricing around $1500 and installation about $300 amount to $1800.
The total new whole set including installation is about $3600.
It is about 50% of new price. Not really worth it
My system is only about 3.5 years old, if get back same system and LAST ONLY another 3.5 years. I think it is really really bad bad bad deal.

Further more, we have no confidence and very disappointed with Mitshubishi heavy industrial air con.
I want to share my bad experience with those intend to buy Mitshubishi Heavy industrial air con.
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Old 30-12-2016, 03:14 PM   #9110
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Yes,
you are right again,
My wife and I have search about 2 compaines for the outdoor unit, pricing around $1500 and installation about $300 amount to $1800.
The total new whole set including installation is about $3600.
It is about 50% of new price. Not really worth it
My system is only about 3.5 years old, if get back same system and LAST ONLY another 3.5 years. I think it is really really bad bad bad deal.

Further more, we have no confidence and very disappointed with Mitshubishi heavy industrial air con.
I want to share my bad experience with those intend to buy Mitshubishi Heavy industrial air con.
I understand in your other posting that the other 3 FCUs are working fine until the one having problem is turned on, and once the defective light blink, all FCUs are down.

If I am not wrong, this is because the system shut down by itself. Have you try just using the other three "good" FCUs for a long period without encountering the problem (ie without turning on the faulty FCU)?

If the other FCUs are working fine, then it is likely that the fault is within the faulty FCU system. Common components are likely not affected.

If this is so, instead of tracing for faulty components, you may wish to shut down the faulty FCU and connect a new single split. You have the choice of using Mitsubishi H I without the need to change the FCU (This can be checked by swapping FCUs) or another brand with new condenser and FCU.

This approach would likely be lesser cost than to change the complete system 4.

The above are my opinion and hope that they are helpful

Last edited by dachee; 31-12-2016 at 08:40 AM..
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Old 30-12-2016, 03:41 PM   #9111
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Hi expert, do you think the the piping run like that feasible?

https://imageshack.com/i/poPUH1j6j
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Old 30-12-2016, 05:52 PM   #9112
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Hi expert, do you think the the piping run like that feasible?

https://imageshack.com/i/poPUH1j6j
HI, why do you place your FCUs above the room doors?
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Old 30-12-2016, 05:58 PM   #9113
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HI, why do you place your FCUs above the room doors?
Neater
The contractor suggest the following

https://imageshack.com/i/pnRPm8ZXj

Anyway I was inform by my id that the new 5 tick model starmex fcu is bigger..don't know for sure or smoke me..
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Old 30-12-2016, 06:50 PM   #9114
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Neater
The contractor suggest the following

https://imageshack.com/i/pnRPm8ZXj

Anyway I was inform by my id that the new 5 tick model starmex fcu is bigger..don't know for sure or smoke me..
You may wish to ask your ID why he selected the location above the door for the FCUs. Yes, the new 5 ticks StarMEX is longer.

Ask for some technical answers and references for the answers he provided.
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Old 30-12-2016, 06:56 PM   #9115
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You may wish to ask your ID why he selected the location above the door for the FCUs. Yes, the new 5 ticks StarMEX is longer.

Ask for some technical answers and references for the answers he provided.

Above the door is what I planned. The air conditioning contractor recommend the second pictures. And give me option on locating dinning fcu in p1 2 and 3
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Old 30-12-2016, 07:21 PM   #9116
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Above the door is what I planned. The air conditioning contractor recommend the second pictures. And give me option on locating dinning fcu in p1 2 and 3
The contractor's placement is bad!

Why do you choose above the doors for the two bedrooms?
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Old 30-12-2016, 07:40 PM   #9117
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The contractor's placement is bad!

Why do you choose above the doors for the two bedrooms?
May I know why not....? Cos I planning to put there too

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Old 30-12-2016, 07:53 PM   #9118
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The contractor's placement is bad!

Why do you choose above the doors for the two bedrooms?
No preference anyway. Just thought above the door would look neater. What your take?
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Old 30-12-2016, 07:53 PM   #9119
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Hi,

Why do you decide to use MUY-GE24 condenser and 1x MSY-GE24VA but not one GE24 with 2 FCUs?
We preferred to have two compressors, one for living room system 1, the other for all bedrooms System 3. Just in case, if one compressor not working. Any best alternatives?
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Old 30-12-2016, 09:42 PM   #9120
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No preference anyway. Just thought above the door would look neater. What your take?
Hi,

Above the door in my opinion may not be an ideal place for the following reasons:

1. The door is normally offset from the centre of the room. As such, the FCU is not able to suck in warm air equally from all corners of the room. This create some hot spots.

2. Having the FCU on one corner of the room, will limit effectiveness of cooling the bed which is where people spend most of the time in the bedroom.

3. Door normally open and close. When door open, warm air, including humid air enters the room. When humid air is in contact with the cold surface of the FCU, water condensation may happen.

4. When the door below the FCU is opened, the FCU fan will suck in the warm air from outside towards the place where it is intended to cool.

5. With the FCU above the door, the drain pipe would need to run horizontally from the FCU to clear the door width before it can run straight down. This allows the accumulation of scum in the slow flowing horizontal pipe. It is good practice to run drain pipe vertically down from the FCU before it is slanted horizontally. This allowed the flow to increase as it drop vertically from the FCU.

6. With the wider 5 ticks FCU, you may have problem centralizing it to the door.

7. Never place a FCU above a toilet door or against a hot wall.

I feel that it is good to place the FCU in such position that it is blowing along the length of the room, able to blow towards the bed, at the centre of the shorter wall, away from the door.

However, there are conflicting understanding if you refer to the geomancy of FCU placement.

The above are my opinion and hope that they are helpful.

Last edited by dachee; 30-12-2016 at 09:55 PM..
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