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Thread: r407c
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18-06-2014, 12:45 PM #1
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Hey, I am new to : RE
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r407c
can i charge r407c in previous r22 ac unit
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18-06-2014, 12:57 PM #2
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Re: r407c
Hi ishtiaq ali,
the oil may be a problem - as it was using R22, it probably has mineral oil in it.
R407C will not work with the mineral oil - it has to have synthetic oil (POE).
Check what oil is in the unit.Tony
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18-06-2014, 02:15 PM #3
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Re: r407c
If it's mineral oil, you'll need to do a number of oil changes until the mineral oil content is acceptable (acceptable depends on the oil manufacturer).
You'll lose about 5% capacity with the R407c.
Yes, it's do-able, it was a common retrofit when I lIved in the UK.
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18-06-2014, 03:06 PM #4
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Re: r407c
.
It is do-able but also check any seals inside the system.
If there are any valves or fittings that have a seal on it,
be aware that the seal might not stand up to the new
refrigerant and oil mixture.
Regards
Rob
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