Typical Specification for Lochinvar Hot Water Generator Systems
Water to Water
The Water to Water Generator System shall be a Lochinvar Model no. _____________ with ____________ tube
bundle heating element. The hot water generator shall be constructed of a (vertical) (horizontal) storage tank. The storage tank shall be ________” diameter x _______” (length) (height) with a ________ gallon capacity. The tube bundle heating element will be single wall designed to recover ____________ GPH for a temperature rise of ________ degrees F to ________ degrees F when supplied with ________ degrees F boiler water. The interior of the storage tank shall be glass lined and fired to 1600 degrees F to ensure a molecular fusing of glass and steel and furnished with magnesium anode(s) to provide protection against corrosion. The storage tank shall be constructed in accordance with the ASME Boiler and Pressure Vessel Code requirements, stamped and registered with the National Board of Boiler and Pressure Vessel Inspectors. The storage tank shall have a 125 psi (optional 150 psi) working pressure and be supplied with an ASME temperature and pressure relief valve. The storage tank shall be furnished with a factory installed heavy steel jacket finished with a baked acrylic enamel finish. The storage tank shall be completely encased in a minimum of 2” thick, high density polyurethane foam insulation to meet the energy efficiency requirements of the latest edition of
the ASHRAE 90.1 Standard. The tank shall be supplied with a drain valve and lifting lugs. The tank includes water recirculation piping with a pump and a ?” drain connection.
The tube bundle heating element shall be constructed and stamped according to section VIII of ASME code. The tube bundles shall be constructed of 3/4” O.D. 20 GA. deoxidized drawn copper tubing. A .75 amp @ 115 volt, 60 Hz, 1/25 HP integral bronze circulator pump with copper soldered recirculation line shall be provided. The heating coils shall be installed in the tank by bolted connection to the collar flange and tube head.
Optional Tube Bundle Construction: Double Wall
Optional Tube Bundle Material: Cupro-Nickel, Stainless Steel.
Optional Control Package: The Water to Water Generator shall be equipped with an isolation valve, direct sense self-actuated temperature control valve, tank temperature sensor and an inlet wye strainer.
Optional Equipment: Manual reset high limit, temperature & pressure gauge, solenoid valve, electric controls, pneumatic controls, manway.
Tank Lining Options: Cement tank lining designed to provide effective corrosion resistance against the chemicals and conditions experienced in the storage of potable water at elevated temperatures. 6/13 – Printed in U.S.A.