Section 3-24

Refrigeration and Air Conditioning Equipment

  (a)    No new installation or replacement installation or refrigeration
      or air conditioning equipment requiring the use of water from the
      public water system shall be installed on any premises until a permit
      authorizing such installation has been issued by the department.
      Before a permit is issued the owner shall inform the department in
      writing of the make, type, horsepower and tonnage of installation, the
      minimum and maximum water requirements, the name and address of the
      applicant, the location of the premises where the unit is or is to be
      installed, and such additional information regarding the proposed
      installation as may be required by the department.
  (b)    No new installation or replacement installation of water-using
      refrigeration or air conditioning equipment having manufacturer's
      ratings of 5 tons of refrigeration capacity or more shall be served by
      the public water system unless such equipment includes water conserving
      devices whose net use of waste of water does not exceed 0.2 gallon per
      minute per ton of refrigeration capacity.  Water-using equipment whose
      capacities or ratings are lower than that mentioned above shall be
      provided with an automatic water-regulating device which limits the
      use of water to not more than 2 gallons per minute per ton of
      refrigeration.
  (c)    Where a consumer is served by more than one unit whose combined
      capacities or ratings total 5 tons of refrigeration or more, such
      installation shall be considered as one unit for the purposes of this
      section.
  (d)    All installations of water-using refrigeration and air conditioning
      equipment, regardless of capacity, which are to be served by the public
      water system will be required to provide backflow protection device in
      accordance with this Section and must conform with all other applicable
      pro visions of these rules and regulations.