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122.214.171.124 Water (R-718)
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Where water is the refrigerant, discharge to a floor drain shall be permitted where the following conditions are met:
- The pressure-relief device set pressure shall not exceed 15 psig (103 kPa).
- The floor drain shall be sized to handle the flow rate from a single broken tube in a refrigerant-containing heat exchanger.
- The Authority Having Jurisdiction finds it acceptable that the working fluid, corrosion inhibitor, and other additives used in this type of refrigeration system are permitted to infrequently be discharged to the sewer system, or a catch tank that is sized to handle the expected discharge shall be installed and equipped with a normally closed drain valve and an overflow line to drain. [ASHRAE 15:126.96.36.199.1]
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