Vacuum air conditioner gas pipe when fitting, new air conditioner install / service
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 May 28 2013, 11:50 AM
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#1
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All Stars
12,019 posts Joined: Jan 2003 
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From my experience, they will vaccum for interter type gas. The R22 some installer do some don't.
My in-law National A/C 2HP still running strong about 10 years now. The installer did not vaccume it. |
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May 30 2013, 11:53 PM
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#2
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All Stars
12,019 posts Joined: Jan 2003
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If worry too much, buy the tools and DIY. This is common in Europe, US and Australia because labour cost are expensive.
My friend living in Perth build his own house. Need about two years with some help from church friends. |
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May 31 2013, 01:02 AM
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#3
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All Stars
12,019 posts Joined: Jan 2003
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QUOTE(platinum_12 @ May 31 2013, 12:36 AM) Its not practical and financially viable to buy all those tools just to install an aircond. All you need to do is observe d work and tell them the right things to do if you have d knowledge. However, If you dont know, just keep silence and let the installer do d job and just accept what ever the result will be. More resources will shorten the time. Ive an uncle, he is an ex army. He built his own home in less then 1 year, in malaysia. Seems like malaysian know how to built house better.   Anyway back to the topic, R22 usually they don't vaccum. R410a required to vaccum, my installer came and Diagnos and refill my inverter a/c 3x for the last 12 months and each time he vaccum it. For R22 he did not vaccum. R410a need to vaccum, and can't over fill the gas else not cold or compressor will trip. |
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May 31 2013, 01:06 AM
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#4
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All Stars
12,019 posts Joined: Jan 2003
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vacuum pump not that expensive la. Can use for other things like service car a/c. China mali 500 can get already.
If got time and house got many a/c can consider. Saving is there if service twice a year. |
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May 31 2013, 10:53 AM
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#5
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All Stars
12,019 posts Joined: Jan 2003
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QUOTE(platinum_12 @ May 31 2013, 10:34 AM) So, what the diff between R410a and R22 that make one need to be vacuum and the other don't? Don't know not the HVAC expert, the installer told me from his experience. Is similar to Car a/c, the R12 don't required vacuum and can reach its peak performance while the R134a need to be vacuum else is not going to be performnin. That I am sure because I had R12 and R134a in the same car difference engine, even do the car a/c myself for few time and cannot skip the vacuum when dealing with R134a. |
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