18-29-607.1.2 Tempered water temperature control.

   Tempered water shall be controlled by one of the following:

   1.   A limiting device conforming to ASSE 1070/ASME A112.1070/CSA B125.70 and set to not greater than 100°F (43°C).

   2.   A thermostatic mixing valve conforming to ASSE 1017.

   3.   A water heater conforming to ASSE 1082.

   4.   A water heater conforming to ASSE 1084.

   This provision shall not supersede the requirement for protective shower valves in accordance with Section 18-29-424.

(Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 27)

18-29-607.1.2.1 Reserved.

Editor's note – Coun. J. 10-14-21, p. 37722, Art. VI, § 27, repealed § 18-29-607.1.2.1, which pertained to mixed water temperature.

18-29-607.2 Hot or tempered water supply to fixtures.

   The developed length of hot or tempered water piping, from the source of hot water to the fixtures that require hot or tempered water, shall not exceed 50 feet (15 240 mm). Recirculating system piping and heat-traced piping shall be considered to be sources of hot or tempered water.

(Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 27)

18-29-607.2.1 Circulation systems and heat trace systems for maintaining heated water temperature in distribution systems.

   For Group R-2, R-3, R-4 and R-5 occupancies that are four stories or less in height above grade plane, the installation of heated water circulation and temperature maintenance systems shall be in accordance with Section R403.5.1 of the Chicago Energy Conservation Code. For other than Group R-2, R-3, R-4 and R-5 occupancies that are four stories or less in height above grade plane, the installation of heated water circulation and heat trace systems shall be in accordance with Section C404.6 of the Chicago Energy Conservation Code.

(Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 27)

18-29-607.2.1.1 Pump controls for hot water storage system.

   The controls on pumps that circulate water between a water heater and a storage tank for heated water shall limit operation of the pump from heating cycle startup to not greater than 5 minutes after the end of the cycle.

(Added Coun. J. 10-14-21, p. 37722, Art. VI, § 27)

18-29-607.2.1.2 Demand recirculation controls for distribution systems.

   A water distribution system having one or more recirculation pumps that pump water from a heated water supply pipe back to the heated water source through a cold water supply pipe shall be a demand recirculation water system. Pumps shall have controls that comply with both of the following:

   1.   The control shall start the pump upon receiving a signal from the action of a user of a fixture or appliance, sensing the presence of a user of a fixture, or sensing the flow of hot or tempered water to a fixture fitting or appliance.

   2.   The control shall limit the temperature of the water entering the cold water piping to 104°F (40°C).

(Added Coun. J. 10-14-21, p. 37722, Art. VI, § 27)

18-29-607.2.1A Reserved.

Editor's note – Coun. J. 10-14-21, p. 37722, Art. VI, § 27, repealed § 18-29-607.2.1A, which pertained to piping insulation.