Pressure Test

[Langdellt]

I am just about to start my own company and have only really worked with R407c. Does any one have info on R410, i need to know what sort of running pressures and what pressure is used to test the system with

Thanks

[Brian_UK]

Do you have a safe handling certificate and if so your handbook should give you the legal required test pressures?

Other than that I would suggest downloading some material from websites such as Daikin or Mitsubishi to gather more information.

[taz24]

I am just about to start my own company and have only really worked with R407c. Does any one have info on R410, i need to know what sort of running pressures and what pressure is used to test the system with

Thanks

Try useing a comparitor.
Or use the charts on coolpack

http://www.et.web.mek.dtu.dk/Coolpack/UK/download.html

taz

[Rotax100uk]

what pressure is used to test the system with

I test a R410a system to 300psi/20bar for 24 hours with OFN

[Argus]

.

There is a pressure testing procedure laid down in a European Standard, EN 378. - Refrigeration Safety.

It's in 4 parts and for pressure testing specifically, you need to read Part 2, though I recommend being familiar with it all.

.

[frank]

I test a R410a system to 300psi/20bar for 24 hours with OFN

300psig is not even sufficient for the HP control setting on an R22 system

Daikin, and others, recommend that R410a systems are pressure tested to 40Barg (600psig)

[davej]

isnt it 1.1 times operating pressure for leak testing?

[Rotax100uk]

Sorry i got confused about the R410a pressures:-

Correct figures are

STRENGTH TEST - - 43 BAR for 15 seconds
LEAKAGE TEST - - 33 BAR for 24 hours

[Brian_UK]

If you refer to Toshiba, as an example, you will find their requirements a useful schedule to follow:-

psi bar Period
50 3.45 5 mins
200 13.79 5 mins
450 31.00 5 mins
600 41.36 1 hour
500 34.47 24 hours

Do be aware that some manufacturers are not so confident of their isolation valves and require you to withdraw the refrigerant charge before strength/pressure testing. Read the instructions first.