(1) Commercail Heavy Duty Water Heater manufactured by A.O. Smith, State, Rheem, or equivalent rated at 50 gallons, 54 KW, 208 volts, 3 phase, 60 cycle AC, and listed by Underwriters' Laboratories and approved to the NSF Standard 5 by UL.All internal surfaces of the heaters exposed to water shall be glasslined with an alkaline borosilicate composition that has been fused to steel by firing at a temperature range of 1400 degrees F to 1600 degrees F. Electric heating elements shall be low watt density. Each element shall be controlled by an individually mounted thermostat and high temperature cut-off switch. All internal circuits shall be fused. The outer jacket shall be of baked enamel finish and shall be provided with full size control compartment for service and maintenance through hinged front door. Electrical junction box with heavy duty terminal block shall be provided.Heater tank shall have a 3 year limited warranty and 1 year on parts.
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