All inverter use minimal 4 wires. Live, neutral, ground, and data. Some have 2 data line. My Panasonic use 4 too.

Something new to me. What model is this? I like to download the installation diagram to study.

From http://www.mitsubishipro.com/media/214726/...h549b_12-10.pdf

page 10 - 14, S1 = Live, S2 = Neutral, and S3 = Data/Singnal. It still have data.

From the design, it look like the ground coming from the copper pipe to the indoor unit.

2 shops he is right, need total of 8-10 HP. My office 2k sqft we have total of 8hp. With two of these of 2.5hp each.

Pioneer is carrier but they focus in upper market and large scale.

Don't look like pipe leaking to me. Drain pipe is always on Tue bottom. Could be leaking from above/ behind.

You can't do such calculation. What is the BTU for both the model? Cooling is about BTU, not Watt. If Daikin have higher BTU, it will not need to run 2 hours full time to cool the room, and it reach optimum performance faster.

Need to know the BTU, and the BTU/Watt, only than need to know the efficiency of the unit. Putting partial number won't give true result.

Because that someone only see the world go around him

Hmm, didn't notice is dim-able, what button you use?

Thanks, will give it a try.

Thanks, tried and it work. Now need to find out if sharp have similar function or not.

If panasonic drive you crazy, wait till you see sharp. Is at least 2x brighter

2030

Do you know when Singapore stop using R22? Is also 2030 and they still have the most A/C per household compare to Malaysia. Majority are also R22

http://www.jandgassociates.co.uk/Downloads/R22PhaseOut.pdf

There is another more detail article about the phase out, you can google it. By 2030 is still a moving target. Just like Car with R12 gas, many country you still can buy it and still cheaper than R134a, and it was suppose to phase out 20 years ago.

No idea. The dateline is consistent to what I read on other HVAC site

It doesn't matter R12 or R410a, both operate similar, if you operate at open environment or short usage either type still the same. In fact some study show R410a degrade when operate in higher outdoor temperature. These were done by property scientific study with proper proof. Not even have any noise different. Unlike some claim expert who say R22 give noise and vibration, and r410a better performance without any scientific proof.

Ref:
R22 and R410A split air-conditioning systems were tested and compared as outdoor temperature ranged from 27.8 °C (82.0 °F) to 54.4 °F (130 °F). The R410A system tests were extended to 68.3 °C (155.0 °F) ambient temperature with a customized compressor. When outdoor temperature increased, the R410A system performance degraded more than the R22 system performance. While capacities of both systems were approximately equal at the 35.0 °C (95.0 °F) rating point, at the 54.4 °C (130.0 °F) outdoor temperature the R410A capacity was 9 % below that of R22. For the same test points, the R410A COP (EER) was 4 % and 15 % lower than the R22 COP (EER), respectively. The degradation trend was linear. Since both systems employed identical heat exchangers and similar design (scroll) compressors, the refrigerant and lubricant used in each system had the dominant effect on the measured results. Operation of the R410A system was stable during all tests, including those with the customized compressors extending up to the 68.3 °F (155.0 °F) outdoor temperature and resulting in a supercritical condition at the condenser inlet. No noticeable changes in noise level or operation of the system was noted.


http://fire.nist.gov/bfrlpubs/build02/PDF/b02186.pdf

Simply write won't cause much, the person that take that advice and used it may be in danger. Some people just never think when writing advice.

Next year you go indo and see got or not.