Condensing Units

[klhitman]

i have a buddy that just bought a food truck. for those that don't know what a food truck is, it a truck that sells food on the side of the road.

well he has a R12 Condensing Units that is way low on charge, it runs on 120vac. but while he is driving it runs on r134 by the way of a separate system.

i want to know if i can convert the R12 system to R134 and what is the down sides?

i told him that i will get prices on new Condensing Units that are set up for R134 or other refrigerants. but what do i have to change if i change the Condensing Unit, i think the TXV will have to be changed?

i am not to bright on this side of the industry so any help will be appreciated

 

[Jack Burton]

i have a buddy that just bought a food truck. for those that don't know what a food truck is, it a truck that sells food on the side of the road.

well he has a R12 Condensing Units that is way low on charge, it runs on 120vac. but while he is driving it runs on r134 by the way of a separate system.

i want to know if i can convert the R12 system to R134 and what is the down sides?

i told him that i will get prices on new Condensing Units that are set up for R134 or other refrigerants. but what do i have to change if i change the Condensing Unit, i think the TXV will have to be changed?

i am not to bright on this side of the industry so any help will be appreciated

The truck sounds like it's been retrofitted. R12 is a superior refrigerant to R134a but it's harmful to the environment, or so they say. If you want to change this thing over, I'd be suspect of all seals, all hoses, and I'd expect the expander valve to be different as well because the pressures are gonna be different. When you refer to a condenser "unit" I'm not sure whether you're referring to a set of coils or some kind of standard industry "compressor/condenser" unit.

In all honesty, I'd ask a guy who does this routinely for food trucks or ask an HVAC engineer. I'm a design ME and I would call in for someones help.

 

[Basskiller]

Get some R409. It's a drop in replacement for R12