Minnesota Administrative Rules

4715.1960 REFRIGERATING UNIT CONDENSERS AND COOLING JACKETS.

Except where potable water provided for a refrigerator condenser or cooling jacket is entirely outside the piping or tank containing a toxic refrigerant, with two separate thicknesses of metal separating the refrigerant from the potable water supply, inlet connection shall be provided with an approved backflow preventer. Also, adjacent to and at the outlet side of the backflow preventer, an approved pressure relief valve set to relieve at 5 psi above the maximum water pressure at the point of installation shall be provided if the refrigeration units contain more than 20 pounds of refrigerants.

Statutory Authority:

MS s 16B.59; 16B.61; 16B.64; 326.37 to 326.45; 326B.101; 326B.106; 326B.13; 326B.43 to 326B.49

History:

28 SR 146; L 2007 c 140 art 4 s 61; art 6 s 15; art 13 s 4

Published Electronically:

May 14, 2012