There are a few details to pay particular attention to.
First, have a chat with the local health department. Since the cooler will be used for (unpackaged) food, it's likely they will want the piping stood off from the surfaces inside. Maybe Mineralacs will be enough; more likely they will want you to use the plastic stand-offs the HVAC guys use, that hold the pipe more than an inch away from the wall. This space is to facilitate cleaning.
If it's a freezer, you will need receptacles near the doors (inside) to power the heat tape that keeps the doors from freezing shut.
You do NOT need 'explosion proof' seals. Just stuff the conduit with a bit of duct seal or squirt in spray foam.
The cooling unit will need a disconnect switch, and you'll need to run power and t-stat cable from the inside 'evaporator' to the compressor outside. Of course, you'll need to mount a t-stat somewhere. The condenser outside will need a timer -the HVAC guys can tell you which one - to control the defrost cycle.
Just drill through the walls in the usual way; your boxex will close off the holes.
Lights are the usual vapor-tight ones, and Bell boxes work well. Teks screws will mount it all. There's usually a piolt light ot lit switch outside to tell everyone that the light is on.
Last edited by renosteinke; 05/24/11 09:18 AM.
