Backflow preventer
Backflow preventer
(OP)
A small constant-temperature room air-conditioner condenser unit will usually be cooled with about 5 gpm chilled water. I am providing domestic-water backup connection which would be higher flow due to higher temp. I know I need backflow preventer. Question is will double check valve be sufficient or is reduced pressure type needed? Rephrased, would a refrigerant leak into domestic water be considered a health hazard taking into account refrigerant type/pressure/quantity?





RE: Backflow preventer
Water makeup to chilled water or condenser water systems are always supplied from a backflow prevented source - a reduced pressure, double check type - it doesn't sound like this application is much different.
RE: Backflow preventer
RE: Backflow preventer
RE: Backflow preventer
I always spec a similar piece of equipment when I supply water to a piece of HVAC equipment unless the equipment has an integral air gap, then I just supply the water.