Performance Requirements for Electrically Heated or Cooled Water Dispensers
|Publication Date:||1 September 2020|
Scope and Purpose
Device shall consist of an accumulator vented to atmosphere when a heater is included, a thermal element or cooler, connection to an electrical outlet, and a dispensing fitting.
Pipe threads and other connections shall conform to the applicable standards.
• Tapered pipe threads shall comply with ASME B1.20.1.
• Dry seal pipe threads shall comply with ASME B1.20.3.
• Compression connections shall comply with SAE J512.
• Soldered connections shall comply with ASME B16.18 or ASME B16.22.
• Push fit connections shall comply with ASSE 1061.
• Press connections shall comply with ASME B16.51.
Storage Tank Vent
For devices that heat water, the storage tank shall be continuously vented to the atmosphere.
Dispensing Nozzle or Tip
The dispensing nozzle, or tip, shall not be threaded or serrated to accept a tube or pipe to convey water to any location other than intended.
Connections to the potable water supply shall not be smaller than ¼-inch (DN 6) nominal size.
Devices that heat water shall be able to dispense hot water at a minimum temperature of 165 °F (73.9 °C).
Devices that cool water shall be able to dispense cold water at a maximum temperature of 50 °F (10 °C).
Devices shall operate at a static pressure range of 20 to 125 psi (138 to 862 kPa).
Devices that cool, or both cool and heat water, for dispensing shall comply with UL 399. Devices that only heat and dispense heated water shall comply with UL 499.
Carbonation Backflow Protection
Where there is a connection to a carbonator, potable water shall be protected from dissolved CO2 by way of a device compliant with ASSE 1022.
Devices that cool water shall be rated in accordance with ASHRAE 18.
The dispenser fitting shall be compliant with ASME A112.18.1 / CSA B125.1.