Bill 260391

..Title Amending Title 4 of The Philadelphia Code, entitled "The Philadelphia Building Construction and Occupancy Code," by amending Subcode "M" (The Philadelphia Mechanical Code) and adopting the 2021 edition of the "International Mechanical Code," as published by the International Code Council, with amendments thereto, as authorized by the Pennsylvania Uniform Construction Code Act, all under certain terms and conditions. ..Body THE COUNCIL OF THE CITY OF PHILADELPHIA HEREBY ORDAINS: SECTION 1. The contents of Subcode "M" of Title 4 of The Philadelphia Code, entitled "The Philadelphia Mechanical Code," are hereby deleted and replaced with the following: SUBCODE "M" (THE PHILADELPHIA MECHANICAL CODE) Article M-1.0 Adoption of the "2021 International Mechanical Code," pursuant to the Pennsylvania Uniform Construction Code Act ("Act"), with state amendments and local amendments that were in effect prior to enactment of the Act or approved pursuant to Section 503 of the Act. � M-1.1 The "2021 International Mechanical Code," as published by the International Code Council, is hereby adopted as the Mechanical Code of the City of Philadelphia and is incorporated as if fully set forth herein, subject to the amendments provided in this Subcode M. � M-1.1.1 The numbers of all local amendments shall be preceded with the prefix "M-". � M-1.1.2 Throughout the code, references to "International" codes or "ICC" codes shall be deemed to refer to the "Philadelphia" codes of the same name. * * * CHAPTER 1 SCOPE AND ADMINISTRATION [Delete contents of entire Chapter and replace as follows:] SECTION M-101 GENERAL M-101.1 Title. These provisions shall be known as the Philadelphia Amendments to the International Mechanical Code, and will be referred to herein as the "Philadelphia Mechanical Code" or "this code". M-101.2 Scope. The Philadelphia Mechanical Code shall regulate the design, installation, maintenance, alteration and inspection of mechanical systems that are permanently installed and utilized to provide control of environmental conditions and related processes within buildings. This code shall also regulate those mechanical systems, system components, equipment and appliances specifically addressed herein. The installation of fuel gas distribution piping and equipment, fuel gas-fired appliances and fuel gas-fired appliance venting systems shall be regulated by the Philadelphia Fuel Gas Code (Subcode G). Exception: Detached one- and two-family dwellings and multiple single-family dwellings (townhouses) not more than three stories high with separate means of egress and their accessory structures shall comply with the Philadelphia Residential Code (Subcode R). M-101.3 Appendices. No appendices are adopted as a part of this code. M-101.4 Intent. The purpose of this code is to provide minimum standards to safeguard life or limb, health, property and public welfare by regulating and controlling the design, construction, installation, quality of materials, location, operation and maintenance or use of mechanical systems. M-101.5 Administrative provisions. This Chapter contains those provisions that are unique to the administration of this code. All other administrative provisions applicable to this code are as set forth in the Administrative Code. M-101.6 Conflicts. Pursuant to the Pennsylvania Uniform Construction Code Act, a provision of the "'International Mechanical Code" does not apply if the provision conflicts with the Boiler and Unfired Pressure Vessel Law (35 P. S. �� 1331.1 - 1331.9). SECTION M-102 INSPECTIONS AND TESTING M-102.1 Evaluation and follow-up inspection services. Prior to the approval of a prefabricated construction assembly having concealed work and the issuance of a permit, the code official shall require the submittal of an evaluation report from an approved agency on each prefabricated construction assembly. The report shall indicate the complete details of the mechanical system, including a description of the system and its components, the basis upon which the system is being evaluated, test results and similar information and other data as necessary for the code official to determine conformance to this code. Exception: Manufactured and Industrialized housing pursuant to Section A-102.12 of the Administrative Code. M-102.1.1 Follow-up inspection. Except where ready access is provided to mechanical systems, service equipment and accessories for complete inspection at the site without disassembly or dismantling, the code official shall conduct in-plant inspections to ensure conformance to the approved evaluation report or shall accept inspection reports from an approved independent inspection agency. The inspection agency shall furnish the code official with the follow-up inspection manual and a report of inspections upon request. The mechanical system shall have an identifying label permanently affixed to the system indicating that factory inspections have been performed. M-102.1.2 Test and inspection records. Required test and inspection records shall be available to the code official at all times during the fabrication of the mechanical system and the erection of the building; or such records as the code official designates shall be filed. M-102.2 Testing. Mechanical systems shall be tested as required in this code and in accordance with Sections M-102.2.1 through M-102.2.3. Tests shall be made by the permit holder after notifying the code official, who shall have the authority to observe the tests. M-102.2.1 New, altered, extended or repaired systems. New mechanical systems and parts of existing systems, which have been altered, extended, renovated or repaired, shall be tested as prescribed herein to disclose leaks and defects. M-102.2.2 Apparatus, instruments, material and labor for tests. Apparatus, instruments, material and labor required for testing a mechanical system or part thereof shall be furnished by the permit holder. M-102.2.3 Reinspection and testing. Where any work or mechanical system does not pass an initial test or inspection, the necessary corrections shall be made so as to achieve compliance with this code. The work or system shall then be reinspected or re-tested and the results resubmitted to the code official as appropriate. * * * CHAPTER 3 GENERAL REGULATIONS * * * SECTION 307 CONDENSATE DISPOSAL * * * [Delete Section 307.2.1.1, and replace as follows:] M-307.2.1.1 Disposal into Clothes Washer Box. Condensate shall be permitted to discharge into a clothes washer box with dual drainage outlets with one outlet dedicated to the clothes washer discharge and one outlet dedicated to condensate discharge. Condensate shall also be permitted to discharge into a clothes washer box with a single drainage outlet where the inlet of the clothes washer box outlet is sized to accommodate both the clothes washer discharge and the condensate discharge. * * * CHAPTER 11 REFRIGERATION * * * SECTION 1101 GENERAL * * * [Add Section 1101.2.1 as follows:] M-1101.2.1 Group A2L, A2, A3, and B1 high-probability equipment. High-probability equipment using Group A2L, A2, A3, or B1 refrigerant shall comply with UL 484, UL/CSA 60335-2-40, or UL/CSA 60335-2-89. * * * SECTION 1103 REFRIGERATION SYSTEM CLASSIFICATION * * * [Delete Table 1103.1 and replace as follows:] TABLE M-1103.1 REFRIGERANT CLASSIFICATION, AMOUNT, AND OEL Chemical Refrigerant Formula Chemical Name of Blend Refrigerant Safety Group Classification Amount of Refrigerant Per Occupied Space [F] Degrees of Hazarda RCL LFLf OELd Pounds per 1000 cubic feet ppm g/m3 Pounds per 1000 cubic feet ppm g/m3 ppm R-11 c CCI3F trichlorofluoromethane A1 0.39 1,100 6.1 - - - 1000 2-0-0b R-12 c CCI2F2 dichlorodifluoromethane A1 5.6 18,000 90 - - - 1000 2-0-0b R-13 c CCIF3 chlorotrifluoromethane A1 - - - - - - 1000 2-0-0b R-13B1 c CBrF3 bromotrifluoromethane A1 - - - - - - 1000 2-0-0b * * * R-32 CH2F2 difluoromethane (methylene fluoride) A2L 0.8 36,000 77 19.1 144,000 306 1,000 1-4-0 * * * R-50 CH4 methane A3 - - - - 50,000 - 1000 - R-113 c CCI2FCCIF2 1,1,2-trichloro-1,2,2-trifluoroethane A1 1.2 2,600 20 - - - 1000 2-0-0b R-114 c CCIF2CCIF2 1,2-dichloro-1,1,2,2-tetrafluoroethane A1 8.7 20,000 140 - - - 1000 2-0-0b * * * R-141b CH3CCI2F 1,1,-dichloro-1-difluororethane - 0.78 2,600 12 17.8 60,000 287 500 2-1-0 R-142b CH3CCIF2 1-chloro-1,1-difluoroethane A2 5.1 20,000 82 20.4 80,000 329 1,000 2-4-0 R-143a CH3CF3 1,1,1-trifluoroethane A2L 4.4 21,000 70 17.5 82,000 282 1,000 2-0-0b R-152a CH3CHF2 1,1-difluoroethane A2 2.0 12,000 32 8.1 48,000 130 1,000 1-4-0 R-170 CH3CH3 ethane A3 0.54 7,000 8.6 2.4 31,000 38 1,000 2-4-0 R-E170 CH3OCH3 Methoxymethane (dimethyl ether) A3 1.0 8,500 16 4 34,000 64 1,000 - * * * R-290 CH3CH2CH3 propane A3 0.59 5,300 9.5 2.4 21,000 38 1,000 2-4-0 R-C318 (CF2)4 octafluorocyclobutane A1 41 80,000 650 - - - 1,000 - R-400c zeotrope R-12/114 (50.0/50.0) A1 10 28,000 160 - - - 1,000 2-0-0b R-400c zeotrope R-12/114 (60.0/40.0) A1 11 30,000 170 - - - 1,000 - * * * R-403B zeotrope R-290/22/218 (5.0/56.0/39.0) A1 18 68,000 290 - - - 1,000 2-0-0b * * * R-406A zeotrope R-22/600a/142b (55.0/4.0/41.0) A2 4.7 21,000 75 18.8 82,000 301.9 1,000 - * * * R-408A zeotrope R-125/143a/22 (7.0/46.0/47.0) A1 21 94,000 330 - - - 1,000 2-0-0b * * * R-411A zeotrope R-127/22/152a (1.5/87.5/11.0) A2 2.9 14,000 46 11.6f 55,000f 185.6f 970 - R-411B zeotrope R-1270/22/152a (3.0/94.0/3.0) A2 2.8 13,000 45 14.8f 70,000f 283.3f 940 - R-412A zeotrope R-22/218/142b (70.0/5.0/25.0) A2 5.1 22,000 82 20.5f 87,000f 328.6f 1,000 - R-413A zeotrope R-218/134a/600a (9.0/88.0/3.0) A2 5.8 22,000 93 23.4f 88,000f 376.9f 1,000 - * * * R-415A zeotrope R-22/152a (82.0/18.0) A2 2.9 14,000 47 11.7g 56,000g 187.9g 1,000 - R-415B zeotrope R-22/152a (25.0/75.0) A2 2.1 12,000 34 8.4 47,000 135.1 1,000 - * * * R-417A zeotrope R-125/134a/600 (46.6/50.0/3.4) A1 3.5 13,000 55 - - - 1,000 2-0-0b R-417B zeotrope R-125/134a/600 (79.0/18.3/2.7) A1 4.3 15,000 69 - - - 1,000 - R-418A zeotrope R-290/22/152a (1.5/96.0/2.5) A2 4.8 22,000 77 19.2g 89,000g 308.4g 1,000 - R-419A zeotrope R-125/134a/E170 (77.0/19.0/4.0) A2 4.2 15,000 67 16.7g 60,000g 268.6g 1,000 - R-419B zeotrope R-125/134a/E170 (48.5/48.0/3.5) A2 4.6 17,000 74 18.5g 69,000g 297.3g 1,000 - R-420A zeotrope R-134a/142b (88.0/12.0) A1 12 44,000 180 - - - 1,000 2-0-0b * * * R-423A zeotrope R-134a/227ea (52.5/47.5) A1 19 59,000 300 - - - 1,000 2-0-0b * * * R-429A zeotrope R-E170/152a/600a (60.0/10.0/30.0) A3 0.81 6,300 13 3.2 25,000 83.8 1,000 - R-430A zeotrope R-152a/600a (76.0/24.0) A3 1.3 8,000 21 5.2 32,000 44 1,000 - R-431A zeotrope R-290/152a (71.0/29.0) A3 0.68 5,500 11 2.7 22,000 38.6 1,000 - R-432A zeotrope R-1270/E170 (80.0/20.0) A3 0.13 1,200 2.1 2.4 22,000 39.2 550 - R-433A zeotrope R-1270/290 (30.0/70.0) A3 0.34 3,100 5.5 2.4 20,000 32.4 760 - R-433B zeotrope R-1270/290 (5.0-95.0) A3 0.39 3500 6.3 2.0 18,000 32.1 950 - R-433C zeotrope R-1270/290 (25.0-75.0) A3 0.41 3,600 6.5 2.0 18,000 83.8 790 - * * * R-435A zeotrope R-E170/152a (80.0/20.0) A3 1.1 8,500 17 4.3 34,000 68.2 1,000 - R-436A zeotrope R-290/600a (56.0/44.0) A3 0.5 4,000 8.1 2.0 16,000 32.3 1,000 - R-436B zeotrope R-290/600a (52.0/48.0) A3 0.51 4,000 8.1 2.0 16,000 32.7 1,000 - * * * R-439A zeotrope R-32/125/600a (50.0/47.0/3.0) A2 4.7 26,000 76 18.9 104,000 303.3 990 - R-440A zeotrope R-290/134a/152a (0.6/1.6/97.8) A2 1.9 12,000 31 7.8h 46000h 124.7h 1,000 - R-441A zeotrope R-170/290/600a/600 (3.1/54.8/6.0/36.1) A3 0.39 3,200 6.3 2.0 16,000 31.7 1,000 - * * * R-443A zeotrope R-1270/290/600a (55.0/40.0/5.0) A3 0.19 1,700 3.1 2.2 20,000 35.6 580 - R-444A zeotrope R-32/152a/1234ze(E) (12.0/5.0/83.0) A2L 5.0 21,000 80 19.9 82,000 319.4 850 - R-444B zeotrope R-32/152a/1234ze(E) (41.5/10.0/48.5) A2L 4.3 23,000 69 17.3 93,000 277.3 890 - R-445A zeotrope R-744/134a/1234ze(E) (6.0/9.0/85.0) A2L 4.2 16,000 67 2.7 63,000 347.4 930 - R-446A zeotrope R-32/1234ze(E)/600 (68.0/29.0/3.0) A2L 2.5 16,000 39 13.5 62,000 217.4 930 - R-447A zeotrope R-32/125/1234ze(E) (68.0/3.5/28.5) A2L 2.6 16,000 42 18.9 65,000 303.5 900 - R-447B zeotrope R-32/125/1234ze(E) (68.0/8.0/24.0) A2L 2.6 16,000 42 19.5 121,000 312.7 970 - * * * R-451A zeotrope R-1234yf/134a (89.8/10.2) A2L 5.0 18,000 81 20.3 70,000 326.6 520 - R-451B zeotrope R-1234yf/134a (88.8/11.2) A2L 5.0 18,000 81 20.3 70,000 326.6 530 - * * * R-452B zeotrope R-32/125/1234yf (67.0/7.0/26.0) A2L 4.8 30,000 77 19.3 119,000 310.5 780 - * * * R-454A zeotrope R-32/1234yf (35.0/65.0) A2L 3.2 16,000 52 18.3 63,000 293.9 690 - R-454B zeotrope R-32/1234yf (68.9/31.1) A2L 3.1 19,000 49 22 77,000 352.6 850 - R-454C zeotrope R-32/1234yf (21.5/78.5) A2L 4.4 19,000 71 18 62,000 289.5 620 - R-455A zeotrope R-744/32/1234yf (3.0/21.5/75.5) A2L 4.9 22,000 79 26.9 118,000 432.1 650 - * * * R-457A zeotrope R-32/1234yf/152a (18.0/70.0/12.0) A2L 3.4 15,000 54 13.5 60,000 216.3 650 - * * * R-459A zeotrope R-32/1234yf/1234ze(E) (68.0/26.0/6.0) A2L 4.3 27,000 69 17.4 107,000 278.7 870 - R-459B zeotrope R-32/1234yf/1234ze(E) (21.0/69.0/10.0) A2L 5.8 16,000 92 23.3 99,000 373.5 640 - * * * R-462A zeotrope R-32/125/143a/134a/600 (9.0/42.0/2.0/44.0/3.0) A2 3.9 16,000 62 16.6f 105000f 265.8f 1,000 - * * * R-500c zeotrope R-12/152a (73.8/26.2) A1 7.4 29,000 120 - - - 1,000 2-0-0b R-501c zeotrope R-22/12 (75.0/25.0) A1 13 54,000 210 - - - 1,000 - R-502c zeotrope R-22/115 (48.8/51.2) A1 21 73,000 330 - - - 1,000 2-0-0b R-503c zeotrope R-23/13 (40.1/59.9) - - - - - - - 1,000 2-0-0b R-504c zeotrope R-32/115 (48.2/51.8) - 28 140,000 450 - - - 1,000 - * * * R-507A zeotrope R-125/143a (50.0/50.0) A1 32 130,000 510 - - - 1,000 2-0-0b * * * R-509A zeotrope R-22/218 (44.0/56.0) A1 24 75,000 380 - - - 1,000 2-0-0b R-510A zeotrope R-E170/600a (88.0/12.0) A3 0.87 7,300 14 3.5 29,000 56.1 1,000 - R-511A zeotrope R-290/E170 (95.0/5.0) A3 0.59 5,300 9.5 2.4 21,000 38 1,000 - R-512A azeotrope R-134a/152a (5.0/95.0) A2 1.9 11,000 31 7.7 45,000 123.9 1,000 - * * * R-516A azeotrope R-1234yf/134a/152a (77.5/8.5/14.0) A2 3.2 13,000 52 13.1 50,000 210.1 590 - R-600 CH3CH2CH2CH3 butane A3 0.15 1,000 2.4 3.0 20,000 48 1,000 1-4-0 R-600A CH(CH3)2CH3 2-methylpropane (isobutane) A3 0.59 4,000 9.5 2.4 16,000 38 1,000 2-4-0 R-601 CH2CH2CH2CH2CH3 pentane A3 0.18 1,000 2.9 2.2 12,000 35 600 - R-601A (CH3)2CHCH2CH3 2-methylbutane (isopentane) A3 0.18 1,000 2.9 2.4 13,000 38 600 - * * * R-744 CO2 carbon dioxide A1 3.4 30,000 54 - - - 5,000 2-0-0 R-1130 (E ) CHCI=CHCI trans-1,2-dichloroethene B2 0.25 1,000 4.0 16 65,000 258 200 - R-1132A CF2=CH2 1,1-difluoroethene A2 2.0 13,000 33 8.1 50,000 131 500 - R-1150 CH2=CH2 ethene (ethylene) B3 - - - 2.2 31,000 36 200 1-4-2 * * * R-1234yf CF3CH=CH2 2,3,3,3-tetrafluoro-1-propene A2L 4.5 16,000 75 18 62,000 289 500 - R-1234ze(E) CF3CH=CFH trans-1,3,3,3-tetrafluoro-1 -propene A2L 4.7 16,000 76 18.8 65,000 303 800 - * * * R-1336mzz(Z) CF3CHCHCF3 cis-1,1,1,4,4,4-hexaflouro-2-butene A1 5.2 13000 84 - - - 500 - For SI: 1 pound = 0.454 kg, 1 cubic foot = 0.0283 m3. a. Degrees of hazard are for health, fire, and reactivity, respectively, in accordance with NFPA 704. b. Reduction to 1-0-0 is allowed if analysis satisfactory to the code official shows that the maximum concentration for a rupture or full loss of refrigerant charge would not exceed the IDLH, considering both the refrigerant quantity and room volume. c. Class I ozone depleting substance; prohibited for new installations d. Occupational Exposure Limit based on the OSHA PEL, ACGIH TLV-TWA, the TERA WEEL or consistent value on a time-weighed average (TWA) basis (unless noted C for ceiling) for an 8 hr/d and 40 hr/wk. e. LFL is based on the Worst Case of Formulation for Flammability (WCF) @ 73.4�F (23�C) unless otherwise noted. f. Worst Case of Fractionation for Flammability (WCFF) LFL @ 140�F (60�C). g. WCFF LFL @ 73.4�F (23�C) h. WCF LFL @ 212�F (100�C). * * * * * * SECTION 1104 SYSTEM APPLICATION REQUIREMENTS * * * [Delete Section 1104.3.1 and replace as follows:] M-1104.3.1 Air Conditioning for human comfort. High-probability systems used for human comfort shall use Group A1 and A2L refrigerant. Exceptions: 1. Equipment listed for and used in residential occupancies containing a maximum of 6.6 pounds (3 kg) of refrigerant. 2. Equipment listed for and used in commercial occupancies containing a maximum of 22 pounds (10 kg) of refrigerant. 3. Industrial occupancies. [Delete Section 1104.3.2 and replace as follows:] M-1104.3.2 Group A2, A3, and B3 refrigerants. Group A2 and B2 refrigerants shall not be used in high probability systems. Group A3 and B3 shall not be used except where approved. Exceptions: This section does not apply to: 1. Laboratories where the floor areas per occupant is not less than 100 square feet (9.3 m2). 2. Listed self-contained systems having a maximum of 0.331 pounds (150 G) of Group A3 refrigerant. 3. Industrial Occupancies. 4. Equipment listed for and used in residential occupancies containing a maximum of 6.6 pounds (3 kg) of Group A2 or B2 refrigerant. 5. Equipment listed for and used in commercial occupancies containing a maximum of 22 pounds (10 kg) of Group A2 or B2 refrigerant. [Delete Table 1104.3.2 in its entirety, without substitution.] * * * SECTION 1106 MACHINERY ROOMS, GENERAL REQUIREMENTS * * * [Delete Section 1106.3 and replace as follows:] M-1106.3 Class 2 and Class 3 refrigerants. Where refrigerants of Groups A2, A3 and B3 are used, the machinery room shall conform to the Class 1. Division 2, hazardous location classification requirements of NFPA 70. * * * [Delete Section 1106.4 in its entirety, including Table 1106.4.2, and replace as follows:] M-1106.4 Group A2L and B2L Refrigerant. Machinery rooms for Group A2L and B2L refrigerant shall comply with Sections 1106.4. through Section 1106.4.3. M-1106.4.1 Elevated Temperatures. Open flame-producing devices or continuously operating hot surfaces over 1290? (700�C) shall not be permanently installed in the room. M-1106.4.2 Refrigerant detector. In addition to the requirements of Section 1105.3, refrigerant detectors shall signal an alarm and activate the ventilation system in accordance with the response time specified in Table 1106.4.2. Table M-1106.4.2 Group A2L and B2l Detector Activation Activation Level Maximum Response Time (seconds) ASHRAE 15 Ventilation Level Alarm Reset Alarm Type Less than or equal to the OEL in Table 1103.1 300 1 Automatic Trouble Less than or equal to the refrigerant concentration level in Table 1103.1 15 2 Manual Emergency M-1106.4.3 Mechanical Ventilation. The machinery room shall have a mechanical ventilation system complying with ASHRAE 15. * * * SECTION 1107 PIPING MATERIAL * * * [Delete Table 1107.4 and replace as follows:] TABLE M-1107.4 REFRIGERANT PIPE PIPING MATERIAL STANDARD Aluminum tube ASTM B210/ASTM B210M, ASTM B491M Brass (copper alloy) pipe ASTM B43 Copper linesets ASTM B280, ASTM B1003 Copper pipe ASTM B42, ASTM B302 Copper tubea ASTM B68, ASTM B75, ASTM B88, ASTM B280, ASTM B819 Steel pipeb ASTM A53, ASTM A106, ASTM A333 Steel tube ASTM A254, ASTM A334 a. Soft annealed copper tubing larger than 1 3/8-inch (35 mm) O.D. shall not be used for field assembled refrigerant piping unless it is protected from mechanical damage. b. ASTM A53, Type F steel pipe shall only permitted for discharge lines in pressure relief systems. * * * [Delate Table 1107.5 and replace as follows:] TABLE M-1107.5 REFRIGERANT PIPE FITTINGS FITTING MATERIAL STANDARD Aluminum ASTM B361 Copper and Copper Alloy (Brass) ASME B16.15, ASME B16.18, ASME B16.22, ASME B16.24, ASME B16.26, ASME B16.50 Steel ASTM A105, ASTM A181, ASTM A193, ASTM A234, ASTM A420, ASTM A707 * * * [Delete Section 1107.7 and replace as follows:] M-1107.7 Flexible connectors, expansion and vibration compensators. Flexible connectors and expansion and vibration control devices shall be listed and labeled for use in refrigerant systems and pressures for which the components are installed. * * * SECTION 1109 REFRIEGERANT PIPE INSTALLATION * * * [Delete Section 1109.2.2 and replace as follows:] M-1109.2.2 Refrigerant and pipe enclosure. Refrigerant piping shall be protected by locating it within the building elements or within protective enclosures. Exception: Piping protection within the building elements or protective enclosure shall not be required in any of the following locations: 1. Where installed without ready access or located more than 7 feet 3 inches (2210 mm) above the finished floor. 2. Where located within 6 feet (1829 mm) of the refrigerant unit or appliance. 3. Where located in a machinery room complying with Section 1105. 4. Outside the building: 1.1 Protected from damage from the weather, including but not limited to, hail, ice, and snow loads and 1.2 Protected from damage within the expected foot or traffic path or 1.3 Outside, underground, installed not less than 8 inches (200 mm) below finished grade and protected against corrosion. [Delete Section 1109.2.3 and replace as follows:] M-1109.2.3 Prohibited Locations. Refrigerant piping shall not be installed in any of the following locations: 1. Exposed within a fire resistance-rated exit access corridor. 2. Exposed within an interior exit stairway. 3. Within an interior exit ramp 4. Within an exit passageway 5. Within an elevator, dumbwaiter or other shaft containing a moving object. * * * [Delete Section 1109.2.5 and replace as follows:] M-1109.2.5 Refrigerant pipe shafts. Refrigerant piping that penetrates two or more floor/ceiling assemblies shall be enclosed in a fire resistance-rated shaft enclosure. The fire-resistance-rated shaft enclosure shall comply with Section 713 of the International Building Code. Exceptions: 1. Refrigeration systems using R-718 refrigerant (water). 2. Piping in a direct refrigeration system where the refrigerant quantity does not exceed the limits of Table 1103.1 for the smallest occupied space through which the piping passes. 3. Piping located on the exterior of the building where vented to the outdoors. * * * [Delete Section 1109.2.6 and replace as follows:] M-1109.2.6 Exposed piping surface temperature. Exposed piping with ready access to nonauthorized personnel having surface temperatures greater than 120? (69�C) or less than 5? (-15�) shall be protected from contact or shall have thermal insulation that limits the exposed insulation surface temperature to a range of 5? (-15�C) to 120? (69�C). * * * [Delete Section 1109.2.7 and replace as follows:] M-1109.2.7 Pipe identification. Refrigeration pipe located in areas other than the room or space where the refrigerating equipment is located shall be identified. The pipe identification shall be located at intervals not exceeding 20 feet (6096 mm) on the refrigerant piping or pipe insulation. The minimum height of lettering of the identification label shall be 1/2 inch (12.7 mm). The identification shall indicate the refrigerant designation and safety group classification of refrigerant used in the piping system. For Group A2L and B2L refrigerants, the identification shall also include the following statement: "WARNING - Risk of Fire. Flammable Refrigerant." For Group A2, A3, B2 and B3 refrigerants, the identification shall also include the following statement: "DANGER - Risk of Fire or Explosion. Flammable Refrigerant." For any Group B refrigerant, the identification shall also include the following statement: "DANGER - Toxic Refrigerant." * * * [Delete Section 1109.3 and replace as follows, but leave Table 10.9.3.2 unchanged:] M-1109.3 Installation requirements for Group A2L, A2, A3, B2L, B2, or B3 refrigerant. Piping systems using Group A2L, A2, A3, B2L, B2, or B3 refrigerant shall comply with the requirements of Section 1109.3.1 and 1109.3.2. M-1109.3.1 Pipe Protection. In addition to the requirements of Section 305.5, aluminum, copper, and steel tube used for Group A2, A3, B2L, B2, and B3 refrigerants and located in concealed locations where tubing is installed in studs, joists, rafters or similar member spaces, and located less than 11/2 inches (38 mm) from the nearest edge of the member, shall be continuously protected by shield plates. Protective steel shield plates having a minimum thickness of 0.0575 inch (1.46 mm) (No. 16 gage) shall cover the area of the tube plus the areas extending not less than 2 inches (51 mm) beyond both sides of the tube. M-1109.3.2 Shaft ventilation. Refrigerant pipe shafts with systems using Group A2L or B2L refrigerant shall be naturally or mechanically ventilated. Refrigerant pipe shafts with one or more systems using any Group A2, A3, B2, or B3 refrigerant shall be continuously mechanically ventilated and shall include a refrigerant detector. The shaft ventilation exhaust outlet shall comply with Section 501.3.1. Naturally ventilated shafts shall have a pipe, duct or conduit not less than 4 inches (102 mm) in diameter that connects to the lowest point of the shaft and extends to the outdoors. The pipe, duct or conduit shall be level or pitched downward to the outdoors. Mechanically ventilated shafts shall have a minimum airflow velocity in accordance with Table 1109.3.2. The mechanical ventilation shall be continuously operated or activated by a refrigerator. Systems utilizing a refrigerant detector shall activate the mechanical ventilation at a maximum refrigerant concentration of 25 percent of the lower flammable limit of the refrigerant. The detector, or a sampling tube that draws air to the detector, shall be located in an area where refrigerant from a leak will concentrate. The shaft shall not be required to be ventilated for double-wall refrigerant pipe where the interstitial space of the double-wall pipe is vented to the outdoors. * * * [Delete Section 1109.4 in its entirety, without substitution] * * * [Delete Section 1109.7 in its entirety, without substitution] * * * SECTION 1110 REFRIGERATION PIPING SYSTEM TEST * * * [Delete Section 1110.3 and replace as follows:] M-1110.3 Test gases. The medium used for pressure testing the refrigerant system shall be one of the following inert gases: oxygen-free nitrogen, helium, argon or premixed nonflammable oxygen-free nitrogen with a tracer of gas of hydrogen or helium. For R-744 refrigerant systems, carbon dioxide shall be allowed as the test medium, For R-718 refrigerant systems, water shall be allowed as the test medium. M-1110.3.1 Test gases not permitted. Oxygen, air, refrigerants other than those identified in Section 1110.3, combustible gases and mixtures containing such gases shall not be used as the pressure test medium. * * * [Delete Section 1110.5 and replace as follows:] M-1110.5 Piping system strength test. Refrigerating system components and refrigerant piping shall be tested in accordance with ASME B31.5 or this section. Separate tests for isolated portions of the system are permitted and provided that all required portions are tested at least once. Pressurize with test gas for a minimum of 10 minutes to not less than the lower of (a) the lowest design pressure for any system component, or (b) the lowest value of set pressure for any pressure relief devices in the system. The design pressures for determination of test pressure shall be the pressure identified on the label nameplate of the condensing unit, compressor, compressor unit, pressure vessel, or other system component with a nameplate. A passing test result shall have no rupture or structural failure of any system component or refrigerant piping. Refrigerant popping and tubing greater than 3/4 inches in diameter shall be tested in accordance with ASHRAE 15. [Delete Section 1110.6 in its entirety, without substitution] [Delete Section 1110.7 in its entirety, without substitution] * * * CHAPTER 15 REFERENCED STANDARDS * * * [Add ASHRAE reference as follows:] ASHRAE ASHRAE 1791 Tullie Circle NE Atlanta, GA 30329 15-2022 Safety Standard for Refrigeration Systems 34-2022 Designation and Safety Classification of Refrigerants * * * [Add ASTM reference as follows:] ASTM ASTM International 100 Bar Harbor Drive, P.O. Box C700 West Conshohocken, PA A333-18 Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service and other Applications with required Notch Toughness * * * [Add UL reference as follows:] UL UL, LLC 333 Pfingsten Road, Northbrook, IL 60062-2096 UL/CSA 60335-2-40 2022 Household and Similar Electrical Appliances-Safety- Part 2-40: Particular Requirements for Electrical Heat Pumps, Air Conditioners and Dehumidifiers UL/CSA 60335-2-89 2021 Household and Similar Electrical Appliances-Safety- Part2-89: Particular Requirements for Commercial Refrigerating Appliances with an Incorporated or Remote Refrigerant Unit or Compressor. * * * ..End 2