18-29-312.9 Cross connection control device inspections.

   The department of water management shall inspect backflow prevention assemblies to determine proper installation including testing by a licensed Cross Connection Control Device Inspector. Reduced pressure principle backflow preventer assemblies, double check- valve assemblies, double-detector check-valve assemblies and pressure vacuum breaker assemblies shall be tested at minimum, annually, the results of annual tests shall be reported within 30 days of tests to the department of water management. In the event of test failure, immediate notification must be made to the department of water management and remedial action taken to prevent the contamination of the potable water supply. The testing procedure shall be performed in accordance with one of the following standards:

   ASSE 5010-1013-1, Sections 1 and 2
   ASSE 5010-1015-1, Sections 1 and 2
   ASSE 5010-1015-2
   ASSE 5010-1015-3, Sections 1 and 2
   ASSE 5010-1015-4, Sections 1 and 2
   ASSE 5010-1020-1, Sections 1 and 2
   ASSE 5010-1047-1, Sections 1, 2, 3 and 4
   ASSE 5010-1048-1, Sections 1, 2, 3 and 4
   ASSE 5010-1048-2
   ASSE 5010-1048-3, Sections 1, 2, 3 and 4
   ASSE 5010-1048-4, Sections 1, 2, 3 and 4
   CSA B64.1.

(Amend Coun. J. 3-27-02, p. 82090, § 3; Amend Coun. J. 11-8-12, p. 38872, § 334)

18-29-313 Equipment Efficiencies.

18-29-313.1 General.

   Equipment efficiencies shall be in accordance with the Chicago Energy Conservation Code.

(Added Coun. J. 10-14-21, p. 37722, Art. III, § 23)

18-29-314 Condensate Disposal.

18-29-314.1 Fuel-burning appliances.

   Liquid combustion byproducts of fuel-burning condensing appliances shall be collected and discharged to a plumbing fixture or disposal area in accordance with the manufacturer's instructions and Section 18-29-803. Condensate piping shall be of corrosion-resistant material and shall not be smaller than the drain connection on the appliance. Such piping shall maintain a horizontal slope in the direction of discharge of not less than one-eighth unit vertical in 12 units horizontal (1-percent slope).

(Added Coun. J. 10-14-21, p. 37722, Art. III, § 24)

18-29-314.2 Evaporators and cooling coils.

   Condensate drain systems shall be provided for equipment and appliances containing evaporators or cooling coils. Condensate drain systems shall be designed, constructed and installed in accordance with Sections 18-29-314.2.1 through 18-29-314.2.5.

(Added Coun. J. 10-14-21, p. 37722, Art. III, § 24)

18-29-314.2.1 Condensate disposal.

   Condensate from all cooling coils and evaporators shall be conveyed from the drain pan outlet to an appropriate place of disposal. Such piping shall maintain a horizontal slope in the direction of discharge of not less than one-eighth unit vertical in 12 units horizontal (1-percent slope). Condensate shall not discharge into a street, alley or other area so as to cause a nuisance.

(Added Coun. J. 10-14-21, p. 37722, Art. III, § 24)

18-29-314.2.2 Drain pipe materials and sizes.

   Components of the condensate disposal system shall be cast iron, galvanized steel, copper and copper alloy, cross-linked polyethylene, polyethylene, CPVC, PVC or polypropylene pipe or tubing. Components shall be selected for the pressure and temperature rating of the installation. Joints and connections shall be made in accordance with the applicable provisions of Chapter 7 relative to the material type. Condensate waste and drain line size shall be not less than 3/4-inch (19.1 mm) internal diameter and shall not decrease in size from the drain pan connection to the place of condensate disposal. Where the drain pipes from more than one unit are manifolded together for condensate drainage, the pipe or tubing shall be sized in accordance with Table 18-29-314.2.2.

Table 18-29-314.2.2
Condensate Drain Sizing

 

EQUIPMENT CAPACITY	MINIMUM CONDENSATE PIPE DIAMETER
Up to 20 tons of refrigeration	3/4 inch
Over 20 tons to 40 tons of refrigeration	1 inch
Over 40 tons to 90 tons of refrigeration	1 1/4 inch
Over 90 tons to 125 tons of refrigeration	1 1/2 inch
Over 125 tons to 250 tons of refrigeration	2 inch

 

For SI: 1 inch = 25.4 mm, 1 ton of capacity = 3.517 kW.

(Added Coun. J. 10-14-21, p. 37722, Art. III, § 24)

18-29-314.2.3 Auxiliary and secondary drain systems.

   In addition to the requirements of Section 18-29-314.2.1, where damage to any building components could occur as a result of overflow from the equipment primary condensate removal system, one of the following auxiliary protection methods shall be provided for each cooling coil or fuel-fired appliance that produces condensate:

   1.   An auxiliary drain pan with a separate drain shall be provided under the coils on which condensation will occur. The auxiliary pan drain shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary drain. The pan shall have a depth of not less than 1 1/2 inches (38 mm), shall be not less than 3 inches (76 mm) larger than the unit or the coil dimensions in width and length and shall be constructed of corrosion-resistant material. Galvanized sheet metal pans shall have a thickness of not less than 0.0236-inch (0.6010 mm) (No. 24 gage) galvanized sheet metal. Nonmetallic pans shall have a thickness of not less than 0.0625 inch (1.6 mm).

   2.   A separate overflow drain line shall be connected to the drain pan provided with the equipment. Such overflow drain shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary drain. The overflow drain line shall connect to the drain pan at a higher level than the primary drain connection.

   3.   An auxiliary drain pan without a separate drain line shall be provided under the coils on which condensate will occur. Such pan shall be equipped with a water-level detection device conforming to UL 508 that will shut off the equipment served prior to overflow of the pan. The auxiliary drain pan shall be constructed in accordance with Item 1 of this section.

   4.   A water-level detection device conforming to UL 508 shall be provided that will shut off the equipment served in the event that the primary drain is blocked. The device shall be installed in the primary drain line, the overflow drain line or in the equipment-supplied drain pan, located at a point higher than the primary drain line connection and below the overflow rim of such pan.

   Exception: Fuel-fired appliances that automatically shut down operation in the event of a stoppage in the condensate drainage system.

(Added Coun. J. 10-14-21, p. 37722, Art. III, § 24)