how to evacuate a loadef reefer.

[qmed]

I wonder if it's possible to evacuate a frozen loaded refer to change txv.

[chillerman2006]

if its flared keep it positive and be quick

brazed , flow of nitrogen

both change drier and will be ok

R's chillerman

[cadwaladr]

no,never enter a loaded reefer to mess with refrigerant based issues it can be fatal! get it unloaded!!!!

[chillerman2006]

I was thinking reefer = sea going container

these have panels on the outside giving access to fans tev ect

[qmed]

Yes, it's a seagoing container ( thermo king magnum) on a ship right now. It's braized.

[qmed]

I don't have nitrogen either.

[chillerman2006]

if you can access the valve

pump her down, push pull the charge out, flow of nitrogen when brazing and new drier your be ok

or in international waters with no regs

just pump her down, dont breath the phosgene when brazing, new drier and purge

learned that last one from supermarket engineers ;)

R's chillerman

[qmed]

Thanks, guys, really appreciate it.

[Magoo]

When you get to port get custom seals replaced by customs people on hatch covers. Saves a lot of grief, but will be a mountain of paper work

[mad fridgie]

Un-roll it or smoke it. The most common ways to unload a reefer!

[mad fridgie]

it is a reefer then you can pump it down, remove the refrigerant form the low side and after the reciever outlet valve. No need to decant.
As far as brazing, if you are on board , you are likely to have CO2 or Argon, either will do for a bleed, to stop oxidization. Vacuum, open up reciever valve.
No purging agent at all, braze it in, then flush through with the refrigerant, to atmosphere. )YES YES, kick my arse for purging to atmosphere.

[waterskidog]

Truck and trailer refrigeration, get out the hoist, do a low side pump down and replace TXV. Daikin container perform an outomatic pump down and replace TXV.