wiring ammonia refrigerant plant
wiring ammonia refrigerant plant
(OP)
I am trying to find out what the wiring requirements are for an industrial ice manufacturing plant using ammonia as a refrigerant. The vendor seems to think no special "hazardous" methods apply. Any other thoughts??





RE: wiring ammonia refrigerant plant
RE: wiring ammonia refrigerant plant
RE: wiring ammonia refrigerant plant
RE: wiring ammonia refrigerant plant
I had a personal experience when leak testing a large ammonia system. The systems are leak tested with a burning sulfur stick. Leaks are indicated by clouds of white smoke. I encountered a hole in a welded joint and the ammonia lit up into a flame about 12 inches long. Yes, DOT to the contrary, ammonia DOES burn.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: wiring ammonia refrigerant plant
RE: wiring ammonia refrigerant plant
This standard covers the design, construction, location, installation, and operation of anhydrous ammonia systems including refrigerated ammonia storage systems. Ammonia manufacturing plants and refrigeration plants where ammonia is used solely as a refrigerant are, however, not covered.
When I did freezer and chillers Material Handling Equip, I know the ammonia cooling had alarms on it in case of leaks. And it was common practice that you took these seriously due to the burn hazards chemical and fire dangers.
But as far as wiring, it was always a concern of 24vdc working in low temperatures, mainly if your using distributed networks. So basically all the wiring into the freezer areas (-20f) was 120vac. Any other areas could be distributed networks if above 0f. The control panel for freezers was located in a heated area.
Biggest concern was always the right type of oil in gearboxes. No pneumatics being used in freezers. Just common sense items.
RE: wiring ammonia refrigerant plant