7 Del. Admin. Code § 1353-14.0 - Gas Water Heaters Suitable For Potable Water And Space Heating

14.1 Units Covered

14.1.1 Gas water heaters, which are suitable for potable water and space heating, shall be covered by this Section provided the water heater does not exceed any of the following limitations:

14.1.1.1 Maximum heat input of 200,000 BTU per hour or 58,600 watts;

14.1.1.2 Maximum water temperature limit of 210 degrees Fahrenheit (99 degrees Celsius); or

14.1.1.3 Nominal water containing capacity of 120 gallons (454.2 L).

14.1.2 This Section shall cover the water heater, heat exchanger, coil or any other device connected directly or indirectly to the water heater and used to supply potable hot water and space heating.

14.2 Gas Water Heaters Suitable for Potable Water and Space Heating with Input Ratings of 75,000 BTU per Hour or less. In addition to the requirements in section 14.1 of this Section, gas water heaters suitable for potable water and space heating with input ratings of 75,000 BTU per hour or less shall also be constructed and installed in accordance with the American National Standard for Gas Water Heaters, Volume 1, ANSI Z21.10.1, current edition and addenda, including, but not limited to Z21.10.la, current edition and addenda, as well as all applicable Federal, State and local laws and regulations. Water heaters covered by this Section are not required to be constructed to the standards set forth in Section IV, ASME Boiler and Pressure Vessel Code, except to the extent required by ANSI Z21.10.1, current edition and addenda.

14.3 Gas Water Heaters Suitable for Potable Water and Space Heating with Input Ratings in excess of 75,000 BTU per Hour but with a Maximum of 200,000 BTU per Hour. In addition to the requirements of 14.1 of this Section, gas water heaters suitable for potable water and space heating, with input ratings in excess of 75,000 BTU per hour, but not more than 200,000 BTU per hour, shall be constructed and installed in accordance with the American National Standard for Gas Water Heaters, Volume III, ANSI Z21.10.3 current edition and addenda, as well as applicable Federal, State and local laws and regulations.

14.4 Limitations

14.4.1 All units covered by this Section shall not be connected to any existing nonpotable water heating system.

14.4.2 No more than one (1) unit covered by this Section shall be connected to a circulating system.

14.4.3 This Section shall not apply to closed loop systems.

14.5 Inspection

14.5.1 Exemption from field inspection of units covered by this Section shall be governed by 29Del.C.§ 8210.

14.5.2 These exempt water heaters shall be equipped with ASME Code approved pressure/temperature relief valves.

14.6 Oil fired combination service water heating or space-heating equipment shall meet the requirements of the ASHRAE/IES 90.1, current edition and addenda.

Notes

7 Del. Admin. Code § 1353-14.0