I don't call this concealed installation. Concealed means hiding the connections and pipes so it cannot be seen.

In my personal preference, I would prefer to use PVC trunking and conduits instead of concealed for easy maintenance and upgrades.

after we paid for this "conceal installation" charges, do we need to pay another charges for him to fix the aircond?

I've never done concealed installation before. Not sure about this one.

Anyway do take note of the following when your aircon tech comes to install your aircon.

I have noticed a lot of aircon techs didn't do a good job. They should at least vacuum pump the refrigerant lines + each fan coil unit and check for leaks before releasing the refrigerant. Without doing the vacuum pump evacuation, the moisture in the air will contaminate the system and the compressor will not function efficiently. It will also lead to premature wear and tear. The vacuum evacuation process should last at least 30 minutes for a thorough moisture and air evacuation.

On the other hand, a lot of technicians tried to save materials costs by using thinner copper tubings, brazing it with soft solder. The thinner tubings will cause more flow resistance and thus wasting the power. Thinner tubings also have the potential to starve the compressor of refrigerant and lubrication, leading to overheating and premature wear and tear.

Make sure they use at least a 80 core cable (not the very thin type) when wiring up the system. They should connect the aircon to a dedicated circuit breaker, not sharing it with other power plugs or lightings.

The temperature of the system should be measured after it has been running for at least 15 minutes in cooling mode with high fan speed and lowest temperature setting. Measure the temperature on the fan coil air intake and air outtake. The temperature difference should be at least 8 deg.C for Panasonic models. Different models come with different specifications.

Make sure your aircon tech does the above - otherwise they're not doing a good job. Another thing, offer the aircon tech a cold drink. This will give them some motivation for a good job.

This post has been edited by tiger1986sg: Mar 23 2009, 01:28 PM

does anybody have good electrician who does good sealing of copper pipping for aircons.....heard a lot on shoddy work by air con shops installer

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Added on March 23, 2009, 3:09 pmtoshiba aircon vs panasonic which 1 better ?

This post has been edited by qsil: Mar 23 2009, 03:09 PM

Johor Bahru:
Zhi Sheng Sdn Bhd
Add : 56, Jalan Nakhoda 2, Taman Ungku Tun Aminah, 81300 Skudai, Johor.
P.I.C : Tee Tian Chua
Tel : +607 5548 388
Fax : +607 5541 388

Alternative Solution: Install yourself

Toshiba vs Panasonic: I choose Panasonic. But if you give me more choices. I choose Daikin.

This post has been edited by tiger1986sg: Mar 23 2009, 08:55 PM

u have to look for the c.o.p. coefficient of performance. the higher the better because it consumes less energy. but of course it is more expensive.

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Added on March 23, 2009, 8:59 pmall brands are same. the COP is one that is important.

This post has been edited by EastSoil: Mar 23 2009, 08:59 PM

York air-con has the worst remote control, have to point directly & closely to the sensor.

The best remote control is National/Panasonic, very sensitive in every direction.

*nods*

My one the buttons are also very hard to press. since new already like that.

yeah..i tot the batt. always weak..so, have to point it closely to the unit..

do you guys know how much Mitsubishi Mr.Slim 1hp price on the market..how does the performance?

This post has been edited by iwan_smtk: Mar 25 2009, 01:40 AM

even my new sharp controller also no sensitive but cooling wise i think is fine. still love my pana remote very sensitive

Get a York, the BTU is higher and it cools your rooms fast with higher BTU.

Any idea of cooling an entire floor in an office? I am planning to cool a office floor, and install those suction fan on each room. Will this in return save me money and be more energy saving? And the A/C will turn on almost 24/7.

Some of the water cooled system that are used for outdoor function or at restaurant, how good are they?

How big is your office?

I will recommend Daikin VRV III systems if your office is big and has multiple rooms or zones. My friend just got it installed in his office. If you're staying in Johore, I can recommend you a contractor.

For chilled water system, it is good for extremely large installation exceeding 200HP like shopping malls. However the drawback is the risk of water leakages. In this case I would go with Daikin VRV if I were you.

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Added on March 29, 2009, 11:01 amYork is noisy I just threw away mine and got a new Daikin

This post has been edited by tiger1986sg: Mar 29 2009, 11:01 AM

my office is using york & my gf's office also uses york, lousy remote

my home using Panasonic & a great remote love it!

Hello guys, I was offered RM280 for the normal A/C conceal work while RM560 for the Inverter type.

Does anyone here know whether this price is reasonable or expensive?

Thanks for your advice in advance.

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Added on April 12, 2009, 5:07 pmAnyone using Daikin brand?

I heard Daikin Inverter conceal charges is same as any brand's non inverter A/C from one of the contractor.

Not sure whether how true it is..anybody has experience on this?



This post has been edited by KingHenry14: Apr 12 2009, 05:07 PM

Anyone can recommend an aircond installer needed urgently....
But of course seeking the best price.
Got 3 units to install at home.
My location PJ OTown.

hitachi air-cond reliable? durable?

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Added on May 9, 2009, 4:26 pmhitachi air-cond reliable? durable?

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Added on May 9, 2009, 4:43 pmhitachi air-cond reliable? durable?

This post has been edited by yon325: May 9 2009, 04:43 PM

PM me if u need a good aircon man.

I've used Daikin since age of 5 (That's 18 years ago) and it is a very good brand. I'm using Daikin Inverter now. The installation cost should be the same as there is nothing much too complicated. For an effective installation, ensure the contractor vacuum (remove air) the refrigerant lines and check for leaks before opening the valves at the outdoor unit. Some of them don't have the correct size of tubings and they just downsize/upsize it. This is not an effective way. They should also use a pipe bender to bend the copper tubings. Bending it by hand can cause a sharp 90 degree blockage.

I recommend that you visit www.daikin.com.my to search their authorised contractors at your area.

maybe u can consider Mitsubishi Mr Slim

RM1.3k for 1.5hp
RM980 for 1hp

energy savvy.. my whole house using this model and brand.
the only disadvantage, it takes a while to produce cool air. other than that, it works perfectly.

just my suggestion.