Best Air Conditioning Units?

[soundman]

I have no degrees in pyhsics or anything, although I have just a smidgen of an understanding about electricity, sound waves, properties of different materials along with advanced construction & application techniques of advanced composites as well as EMF applications of magnets, coils & whatnot and the list goes on....... for ever ........

& now I have that off my chest I just want to add that I have been very happy with the Mitsu air units. Bought an 8000, 13000 & 18000 for the living room. The 18000 is a little on the noisy side but the 8000 & 13000 wouldn't wake a newborn gecko.

Cheers,

Soundman.

[JetsetBkk]

& now I have that off my chest I just want to add that I have been very happy with the Mitsu air units.

I have two Mitsuwhatsits. One of them started playing up a few months ago - wouldn't respond to the remote control. I figured out it was something wrong with the receiving circuit inside the unit, so took the unit apart and swapped the circuit with the one from the other unit. Not surprisingly, the unit with the working circuit started responding again, but amazingly the unit with the faulty circuit also responded to the remote. So now they both work. Very strange.

[jackr]

& now I have that off my chest I just want to add that I have been very happy with the Mitsu air units.

I have two Mitsuwhatsits. One of them started playing up a few months ago - wouldn't respond to the remote control. I figured out it was something wrong with the receiving circuit inside the unit, so took the unit apart and swapped the circuit with the one from the other unit. Not surprisingly, the unit with the working circuit started responding again, but amazingly the unit with the faulty circuit also responded to the remote. So now they both work. Very strange.

Dirty terminals and dry solder

[jayjayjayjay]

I am just building a new house and am at the stage where I need to choose the air conditioning. Does anyone know what is a very good make to install - it must be very quiet, both inside and the outside compressor. would be grateful for any advice

there's is hardly any difference and any advice you might get is biased and based most probably on the experience of the brand owned.

Naam, totally agree, which is why I would like to know if there is any decent report on aircondition comparisons/ reviews by consumer groups.

Cooling ability, cost of operation (cooling and R&M) and longevity are three basic components that would interesting to see... Any consumer groups in Thailand??

[JetsetBkk]

& now I have that off my chest I just want to add that I have been very happy with the Mitsu air units.

I have two Mitsuwhatsits. One of them started playing up a few months ago - wouldn't respond to the remote control. I figured out it was something wrong with the receiving circuit inside the unit, so took the unit apart and swapped the circuit with the one from the other unit. Not surprisingly, the unit with the working circuit started responding again, but amazingly the unit with the faulty circuit also responded to the remote. So now they both work. Very strange.

Dirty terminals and dry solder

Yes, quite likely - especially as the circuits are forever getting cold and then warm. The next time it stops working I'll get the soldering iron out and start melting things!

[MrSquigle]

a tiny -perhaps slightly demented- lesson on aircons with compressors driven via converters:

the energy savings are achieved as the rotations of the DC-driven compressor are regulated by a thermostat and cooling demand is therefore better met than by the conventional on/off method. electricity consumption might be reduced to a maximum of 30%, any savings beyond this is a fairy tale and belongs to the famous collection of fairy tales compiled by the Grimm Brothers.

So Mr Naam, any chance of a comment on this ?? only if you have the time or inclination or desire to help and share knowledge.

http://www.coolthaihouse.com/forum/viewtopic.php?t=1045

[Naam]

So Mr Naam, any chance of a comment on this ?? only if you have the time or inclination or desire to help and share knowledge.

http://www.coolthaihouse.com/forum/viewtopic.php?t=1045

short comment: anybody who claims that the length of suction and pressure pipes does not effect efficiency and therefore energy consumption has no "freaking idea" but possesses a wealth of said "no freaking idea"

[MrSquigle]

How long till we can anticipate the long answer ??

[Naam]

How long till we can anticipate the long answer ??

do you have any specific question MrSquigle? i am not inclined to write a dissertation which is of no interest to anybody.

[MrSquigle]

If I knew what a disertation was, it may be of interest to me !

My question is the same as the one I pointed you towards.

Is there a loss in performance over a certain length from the split units, the inside unit and the outside unit. If there is, what is that distance where it kind of starts to effect the performance.

And if htere is a loss, is it in the cooling loss or the increase in workload on the machine and hense the electrical bill.

Could aircon units be placed on a roof of a condo building for the upper half of the units and on the ground for the lower half ? I have heard 2 different and conflicting versions on this.

[Naam]

If I knew what a disertation was, it may be of interest to me !

dissertation: A lengthy, formal treatise, especially one written by a candidate for the doctoral degree at a university; a thesis.

Is there a loss in performance over a certain length from the split units, the inside unit and the outside unit. If there is, what is that distance where it kind of starts to effect the performance.

yes there is. factory specifications (cooling capacity, energy consumption, etc.) are based on outside temperature, outside relative humidity, inside temperature, inside relative humidity, inside desired temperature, rated voltage (not actual voltage!) and last not least on a maximum length of the piping. this length varies depending on the manufacturer but in general talk was and still is 7 to 8 meters. the second part of your question is a tricky one because it depends on the factors i listed above. also, performance does not decrease linear with longer piping but exponentially.

as an example i am using arbitrary values!: if additional 5 meters of piping reduce efficiency by 5%, respectively consume 5% more energy adding additional 5 meters might reduce total efficiency by 15% and not only by 10%.

And if there is a loss, is it in the cooling loss or the increase in workload on the machine and hense the electrical bill.

beyond a certain piping length the answer is BOTH.

Could aircon units be placed on a roof of a condo building for the upper half of the units and on the ground for the lower half ? I have heard 2 different and conflicting versions on this.

both conflicting versions can be right. you cannot install the compressor/condenser unit above the evaporator without making a simple loop in the piping. the reason for this is that the compressor is lubricated by oil (like a car engine). without the "oil catch loop" most of this oil would accumulate in the lower part of the piping, affect the function of the expansion valve in the evaporator (inside unit) and last not least the compressor would fail due to the lack of lubricant.

addendum: if for optical or technical reasons very long piping is required, the disadvantage can be compensated by increasing the diameter of the pressure pipe.

[soundman]

both conflicting versions can be right. you cannot install the compressor/condenser unit above the evaporator without making a simple loop in the piping. the reason for this is that the compressor is lubricated by oil (like a car engine). without the "oil catch loop" most of this oil would accumulate in the lower part of the piping, affect the function of the expansion valve in the evaporator (inside unit) and last not least the compressor would fail due to the lack of lubricant.

Who says you never learn anything on TV?

I has an argument with the AC man on the positioning of the compressor for aesthetic reasons & he couldn't explain why, just said that was the way it had to be.

Now I know.

[zeusbheld]

if you graduated in '71 it's probably dementia. that'd explain a lot.

dear diary,

today i was told by a learned friend that the cooler and less humid air in my fridges are caused by my dementia.

and today you were told that it's a remarkable achievement, graduating from a famous university without being able to read. congratulations!

[zeusbheld]

a tiny -perhaps slightly demented- lesson on aircons with compressors driven via converters:

the energy savings are achieved as the rotations of the DC-driven compressor are regulated by a thermostat and cooling demand is therefore better met than by the conventional on/off method. electricity consumption might be reduced to a maximum of 30%, any savings beyond this is a fairy tale and belongs to the famous collection of fairy tales compiled by the Grimm Brothers.

true...

except in context of replacing older, less efficient, poorly maintained aircons. in the case of the OP, comparing with other brand new aircons, almost certainly wouldn't be more than 30 percent.

[Naam]

a tiny -perhaps slightly demented- lesson on aircons with compressors driven via converters:

the energy savings are achieved as the rotations of the DC-driven compressor are regulated by a thermostat and cooling demand is therefore better met than by the conventional on/off method. electricity consumption might be reduced to a maximum of 30%, any savings beyond this is a fairy tale and belongs to the famous collection of fairy tales compiled by the Grimm Brothers.

true...

except in context of replacing older, less efficient, poorly maintained aircons. in the case of the OP, comparing with other brand new aircons, almost certainly wouldn't be more than 30 percent.

good that you mentioned that fact. prevents that some readers have too high expectations on possible energy savings.

[Naam]

if you graduated in '71 it's probably dementia. that'd explain a lot.

dear diary,

today i was told by a learned friend that the cooler and less humid air in my fridges are caused by my dementia.

and today you were told that it's a remarkable achievement, graduating from a famous university without being able to read. congratulations!

learned reading and writing years later but managed that none of my lecturers noticed my shortcoming

[MrSquigle]

and developed a sense of humour during physics classes, truly a stand out in the crowd kinda guy.

I have a reply to your reply to my reply, but need to wait till I can write it proper like....sometime in the new year.

[Tung_Thaid]

Have YORK and MITSUBISHI here. Had Daikin at previous address.

Would definitely stick with Mitsubishi. I particularly like the Economy / Auto setting with timer for bedroom. Very quiet unit.