Replacement for R502

[bellg]

I am working on a Thermo-King SB11 that has lost its refrigerant charge.In the past I have successfully used 408a as drop-in replacement.This is no longer available - what can I use instead?

[clivemtk]

try R 69L which was the replacment for r502 the suction vibrasorber and rubber pipe on throttling valve must be replaced by braided hoses

[bellg]

try R 69L which was the replacment for r502 the suction vibrasorber and rubber pipe on throttling valve must be replaced by braided hosese

Thanks for the quick reply,Clivemtk but is 69l not also on the banned list since the start of the year?

[DaButcher]

I am working on a Thermo-King SB11 that has lost its refrigerant charge.In the past I have successfully used 408a as drop-in replacement.This is no longer available - what can I use instead?

Are you sure it had R502? I never saw R502 until the SBIII Max.

404A can be used as a 502 replacement if you flush and change to the correct oil. HP80 is what Thermo King recommends, at 90% of original charge.

[abbsnowman]

We use HP80 for R502.

[bellg]

Are you sure it had R502? I never saw R502 until the SBIII Max.

404A can be used as a 502 replacement if you flush and change to the correct oil. HP80 is what Thermo King recommends, at 90% of original charge.

Yes definetly R502. Thanks to both you and Abbs for your helpful suggestions.