PDA

View Full Version : Vacuuming in foggy and cold weather



matrix72
11-11-2011, 01:59 PM
Hi all.

Anyone has experience in vacuuming the cobber tubes in foggy and cold weather, or should one avoid such condition?

Please share your experience.

Regards

M

Grizzly
11-11-2011, 04:46 PM
Sometimes you have no choice.
But the lower the ambient and the wetter the atmosphere that any install may of been subjected to.
The lower the vacuum needed to eradicate any moisture.
Grizzly

hyperion
11-11-2011, 05:46 PM
Purge the tubing with OFN and then carry out a triple evacuation, breaking the vacuum with OFN at each stage.

chemi-cool
11-11-2011, 10:33 PM
You can also heat the system with hot water or even with a torch.

install monkey
11-11-2011, 10:48 PM
link the lp switch,compressor overheat stat and run the new system to push the moisture out-speeds up the vaccing process

chemi-cool
12-11-2011, 10:28 AM
link the lp switch,compressor overheat stat and run the new system to push the moisture out-speeds up the vaccing process

That will require an experienced engineer or the compressor will burnout.

stufus
12-11-2011, 04:16 PM
You will need a hat,scarf ,warm jacket and a pair of gloves.
And a torch with a yellow lens.:D

Cheers
Stu

Contactor
03-01-2012, 01:02 AM
Hello

You should use a steam chart and read off the depth of vacuum for the ambient temperature at the coldest part of the system. You wont be able to pull a satisfactory vacuum if any pipework is below 0c.

There's no need to pull such a deep vacuum in hot weather, its a waste oftime.

Triple vac just speeds the process up, it wont increase the depth of the vacuum.

Regards