The Refrigerant Side of Heat Pump Water Heaters
(Room 208 A & B)
14 Oct 26
10:00 AM
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11:15 AM
Tracks:
Specialty/Fire Systems
With the use of heat pump water heaters increasing, plumbing engineers need to understand the refrigerant requirements of ASHRAE 15, 15.2, the Uniform Mechanical Code, and the International Mechanical Code. Heat pump water heater installations are more complex than non-heat pump water heaters. Depending on the refrigerant used in the system, the design and installation requirements will vary. The common refrigerants used fall into the category of either Group A1 or Group A2L, and this session will identify the difference between them. It also will address the refrigerant concentration limits (RCL), effective dispersal volume (EDV), effective dispersal volume charge (EDVC), mitigation measures, connected spaces, ventilation requirement options, and safety shutoff valves (SSOV). The difference between self-contained and split systems regarding installation requirements will be reviewed. The possible listing of ETRS water heaters in the future and their impact on design will also be discussed.