No refrigeration equipment or air-conditioning
equipment requiring the use of water supplied by the village shall
be installed by any user unless a permit authorizing such installation
is issued by the Superintendent.
All installations of any individual or collective
system of refrigeration or air conditioning in any premises being
supplied with water shall be made only in accordance with the following
specifications:
A. Installations with a capacity of three tons or more
shall be equipped with a water-conserving device, such as an economizer,
evaporative condenser, water-cooling tower or similar apparatus, which
device shall not consume for makeup purposes in excess of 5% of the
consumption that would normally be used without such a device.
B. Installations of such equipment under the capacity
of three tons shall be provided with an automatic water supply regulating
device so as to limit the flow of water in relation to the condenser
temperature reduction requirements of the apparatus, and in no case
shall the equipment use in excess of two gallons per minute for each
ton of capacity.
C. Each direct water connection to any such equipment
shall be equipped with a backflow preventing device, except in installations
where the water supply piping has no contact with the refrigerant.
D. Any such refrigeration or air-conditioning unit with
a capacity of 20 or more pounds of refrigerant shall be provided with
a relief valve installed on the outlet side of the check valve of
the water supply connection, which relief valve shall be set at five
pounds above the maximum water pressure at the point of installation.