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Thread: Refrigerant compressed air dryer
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18-07-2019, 08:08 PM #1
Refrigerant compressed air dryer
Dear Colleagues
In a refrigerant air dryer R22, I would like to replace the High Pressure Switch, setting in 28Bar (CUT OUT), with a thermostat and I would like to know at what temperature must be set (CUT OUT).
Thanks a lot.
Best Regards
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18-07-2019, 11:49 PM #2
Re: Refrigerant compressed air dryer
Set the same temperature as the original pressure setting was at.
Same switch, different dial.Brian - Newton Abbot, Devon, UK
Retired March 2015
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19-07-2019, 06:54 AM #3
Re: Refrigerant compressed air dryer
Hi kaskiris
If it is a HP safety I would not replace it with a thermostat.
Regards
PaulBorn to fish, forced to work
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19-07-2019, 08:20 PM #4
Re: Refrigerant compressed air dryer
why replace a high pressure safety switch with a thermostat
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20-07-2019, 03:37 PM #5
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20-07-2019, 11:22 PM #6
Re: Refrigerant compressed air dryer
This sounds a very strange idea and potentially dangerous . For a thermostat to work, 1) it’s bulb would need to be fitted in one particular position on the system ,2) the bulb would need to be insulated from air movement etc , 3) the thermal lag of the thermostat would need to be taken into consideration.
The thermostat setting would be approx 70 deg C . provided the bulb was fitted to the correct position in the system.
In theory an HP pressure switch will work anywhere on the high side of the system from the discharge pipe through to the liquid line. A thermostat though would only work correctly in one area only .
Perhaps Kashmiris can tell us specifically where he would fit the thermostat bulb as this would need to be correct for correct functionality of the stat to take place.
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20-07-2019, 11:35 PM #7
Re: Refrigerant compressed air dryer
Is Cyprus really that isolated you can’t get parts overnight, or in a few days?
http://etapol.com/index.php/thermostats-controls
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21-07-2019, 06:46 AM #8
Re: Refrigerant compressed air dryer
dose Cyprus come under f gas regs with regards to working on old R22 equipment
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21-07-2019, 12:57 PM #9
Re: Refrigerant compressed air dryer
Is the OP going to reply or are we wasting our time here
Brian - Newton Abbot, Devon, UK
Retired March 2015