Equipment, refrigeration and valve definitions frequently referenced

Grounded in the retrieved California Mechanical Code — click a citation to read the verbatim passage:

• CMC § 5.508.1.2 High relevance — show source text

  5.508.1.2 Halons. Install HVAC, refrigeration and fire suppression equipment that do not contain Halons.

  5.508.2 Supermarket refrigerant leak reduction. New commercial refrigeration systems shall comply with the provisions of this section when installed in retail food stores 8,000 square feet or more conditioned area, and that utilize either refrigerated display cases, or walk-in coolers or freezers connected to remote compressor units or condensing units. The leak reduction measures apply to refrigeration systems containing high-global-warming potential (high-GWP) refrigerants with a GWP of 150 or greater. New refrigeration systems include both new facilities and the replacement of existing refrigeration systems in existing facilities.

  Exception: Refrigeration systems containing low-global warming potential (low-GWP) refrigerant with a GWP value less than 150 are not subject to this section. Low-GWP refrigerants are nonozone-depleting refrigerants that include ammonia, carbon dioxide (CO 2 ), and potentially other refrigerants.

  5.508.2.1 Refrigerant piping. Piping compliant with the California Mechanical Code shall be installed to be accessible for leak protection and repairs. Piping runs using threaded pipe, copper tubing with an outside diameter (OD) less than [1] / 4 inch, flared tubing connections and short radius elbows shall not be used in refrigerant systems except as noted below.

  5.508.2.1.1 Threaded pipe. Threaded connections are permitted at the compressor rack. 5.508.2.1.2 Copper pipe. Copper tubing with an OD less than [1] / 4 inch may be used in systems with a refrigerant charge of 5 pounds or less.

  5.508.2.1.2.1 Anchorage. One-fourth-inch OD tubing shall be securely clamped to a rigid base to keep vibration levels below 8 mils.

  5.508.2.1.3 Flared tubing connections. Double-flared tubing connections may be used for pressure controls, valve pilot lines and oil.

  Exception: Single-flared tubing connections may be used with a multiring seal coated with industrial sealant suitable for use with refrigerants and tightened in accordance with manufacturer’s recommendations.

  5.508.2.1.4 Elbows. Short radius elbows are only permitted where space limitations prohibit use of long radius elbows.

  5.508.2.2 Valves. Valves and fittings shall comply with the California Mechanical Code and as follows.

  5.508.2.2.1 Pressure relief valves. For vessels containing high-GWP refrigerant, a rupture disc shall be installed between the outlet of the vessel and the inlet of the pressure relief valve.

  5.508.2.2.1.1 Pressure detection. A pressure gauge, pressure transducer or other device shall be installed in the space between the rupture disc and the relief valve inlet to indicate a disc rupture or discharge of the relief valve.

  5.508.2.2.2 Access valves. Only Schrader access valves with a brass or steel body are permitted for use.

  5.508.2.2.2.1 Valve caps. For systems with a refrigerant charge of 5 pounds or more, valve caps shall be brass or steel and not plastic.

  5.508.2.2.2.2 Seal caps. If designed for it, the cap shall have a neoprene O-ring in place.

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 5-37

• CMC § 3.3.39 Medium relevance — show source text

  [NFPA 96:3.3.39]

  Plenum. An air compartment or chamber including uninhabited crawl space areas above a ceiling or below a floor, including air spaces below raised floors of computer/data processing centers or attic spaces, to one or more ducts are connected and that forms part of either the supply-air, return-air, or exhaust-air system, other than the occupiable space being conditioned.

  Plumbing Code. The Uniform Plumbing Code (UPC) promulgated by the International Association of Plumbing and Mechanical Officials (IAPMO), as adopted by this jurisdiction. [HCD 1 & HCD 2] Whenever the term “Plumbing Code” is used in this code, it shall mean the California Plumb- ing Code, Title 24, Part 5.

  Portable Cooling Unit. A self-contained refrigerating system, not over 3 horsepower (hp) (2.2 kW) rating that has been factory assembled and tested, installed without supply-air ducts and without connecting any refrigerant-containing parts. This definition shall not include an absorption unit.

  Portable Evaporative Cooler. An evaporative cooler that discharges the conditioned air directly into the conditioned space or zone without the use of ducts and can be readily transported from place to place without dismantling any portion thereof.

  Portable Ventilating Equipment. Ventilating equipment that can be readily transported from place to place without dismantling a portion thereof and that is not connected to a duct.

  2025 CALIFORNIA MECHANICAL CODE 43

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  DEFINITIONS

  Power Boiler Plant. One or more power steam boilers or power hot water boilers and connecting piping and vessels within the same premises.

  Power Ventilator, Dryer Exhaust Duct. A fan used to boost airflow through a clothes dryer duct.

  PP. Polypropylene.

  Pressure, Design. The maximum allowable pressure for which a specific part of a system is designed. Pressure, Design (Refrigeration). The maximum allowable pressure for which a specific part of a refrigeration system is designed.

  Pressure, Field Test. A test performed in the field to prove system tightness.

  Pressure-Imposing Element. A device or portion of the equipment used for the purpose of increasing the pressure of the refrigerant vapor.

  Pressure-Limiting Device. A pressure-responsive mechanism designed to automatically stop the operation of the pressure-imposing element at a predetermined pressure.

  Pressure-Relief Device. A pressure-actuated valve or rupture member or fusible plug designed to automatically relieve excessive pressure.

  Pressure Test. The minimum gauge pressure to which a specific system component is subjected under test condition. Pressure Vessel (Unfired). A closed container, having a nominal internal diameter exceeding 6 inches (152 mm) and a volume exceeding 1 [1] ⁄ 2 cubic feet (0.04 m [3] ), for liquids, gases, vapors subjected to pressures exceeding 15 psi (103 kPa), or steam under a pressure.

  Pressure Vessel, Refrigerant. A refrigerant-containing receptacle that is a portion of a refrigeration system, but shall not include evaporators, headers, or piping of certain limited size and capacity.

• CMC § 3.3.15 Medium relevance — show source text

  [NFPA 96:3.3.15] For the purpose of the definition, it specifically includes the exhaust compartment of hoods and welded joints of exhaust ducts, yet specifically does not include filter support frames or appendages inside hoods.

  Conversion Burner, Gas. A unit consisting of a burner and its controls utilizing gaseous fuel for installation in an appliance originally utilizing another fuel. [NFPA 54:3.3.16.2]

  Cooling. Air cooling to provide a room or space temperature of 68°F (20°C) or above.

  Cooling System. All of the equipment, ducts and components, including associated refrigeration, intended or installed for the purpose of cooling air by mechanical means and discharging such air into any room or conditioned space. This definition shall not include an evaporative cooler.

  Cooling Unit. A self-contained refrigeration system that has been factory assembled tested, and installed with or without conditioned air and ducts, without connecting any refrigerant-containing parts. This definition shall not include a portable cooling unit or an absorption unit.

  Copper Alloy. A homogenous mixture of two or more metals in which copper is the primary component, such as brass and bronze.

  Crawl Space. In a building, an area accessible by crawling, having a clearance less than human height, for access to plumbing or wiring, storage, etc.

  CSST. An acronym for corrugated stainless steel tubing.

  2025 CALIFORNIA MECHANICAL CODE 35

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  DEFINITIONS

  206.0 – D –

  Damper. A valve or plate for controlling draft or the flow of gases, including air. [NFPA 211:3.3.52]

  Ceiling Radiation Damper. A listed device installed in a ceiling membrane of a fire-resistance-rated floorceiling or roof-ceiling assembly to automatically limit the radiative heat transfer through an air inlet/outlet opening. [NFPA 5000:3.3.140.1]

  Combination Fire/Smoke Damper. An automaticclosing metal assembly consisting of one or more louvers, blades, slats, or vanes that closes upon detection of heat or smoke as to restrict the passage of flame and smoke.

  Corridor Damper. An automatic closing metal assembly consisting of one or more louvers, blades, slats, or vanes that closes upon detection of heat or smoke as to restrict the passage of flame and smoke used where air ducts penetrate horizontal openings in fire-resistancerated corridors.

  Fire Damper. An automatic-closing metal assembly consisting of one or more louvers, blades, slats, or vanes that closes upon detection of heat so as to restrict the passage of flame.

  Smoke Damper. A damper arranged to seal off airflow automatically through a part of an air duct system so as to restrict the passage of smoke.

  Volume Damper. A device that, when installed, will restrict, retard, or direct the flow of air in any duct, or the products of combustion in any heat-producing equipment, its vent connector, vent, or chimney.

  Department. [HCD 1 & HCD 2] “Department” means the Department of Housing and Community Development.

• CMC § 8.13.6.2 Medium relevance — show source text

  (1) Refrigerant compressors

  (2) Refrigerant pumps

  (3) Normally closed automatic refrigerant valves

  (4) Other unclassified electrical sources of ignition with apparent power rating greater than 1 kVA, where the apparent power is the product of the circuit voltage and current rating. [ASHRAE 15:8.13.6.2] 1106.11.7 Mechanical Equipment Control. Remote control of the mechanical equipment in the refrigerating machinery room shall be provided immediately outside the machinery room door solely for the purpose of shutting down the equipment in an emergency. Ventilation fans shall be on a separate electrical circuit and have a control switch located immediately outside the machinery room door. [ASHRAE 15:8.13.7] 1106.11.8 Refrigerant Detectors. Each refrigerating machinery room in accordance with Section 1106.11 shall contain one or more refrigerant detectors in accordance with Section 1106.11.9. The detector(s) sensing element shall be located in areas where refrigerant from a leak will concentrate, with one or more set points that activate responses in accordance with Section 1106.11.10 for alarms and Section 1106.11.11 for mechanical ventilation. Multiport-type devices shall be prohibited. {ASHRAE 15:8.13.8} 1106.11.9 Refrigerant Detectors Requirements. Refrigerant detectors required by Section 1106.11 shall meet all of the following conditions:

  (1) A refrigerant detector shall be capable of detecting each of the specific refrigerant designations in the machinery room.

  (2) The refrigerant detector shall activate responses within a time not to exceed a limit specified in Section 1106.11.10 and Section 1106.11.11 after exposure to refrigerant concentration exceeding a limit value specified in Section 1106.11.10 and Section 1106.11.11.

  (3) The refrigerant detector shall have a set point not greater than the applicable Occupational Exposure Limit (OEL) value in accordance with Table 1102.3. The applicable OEL value shall be the lowest OEL value for any refrigerant designation in the machinery room. For refrigerants that do not have an OEL value in Table 1102.3, use a value determined in accordance with the OEL as defined by ASHRAE 34 where approved by the Authority Having Jurisdiction.

  (4) The refrigerant detector shall have a set point not more than the applicable Refrigerant Concentration Limit (RCL) value in accordance with Table 1102.3. The applicable RCL value shall be the lowest RCL value for any refrigerant designation in the machinery room. For refrigerants that do not have a RCL value in Table 1102.3, use a value determined in accordance with the RCL as defined by ASHRAE 34 where approved by the Authority Having Jurisdiction.

  (5) The refrigerant detector shall provide a means for automatic self-testing and shall be in accordance with Section 1106.11.10.4. The refrigerant detector shall be tested during installation and annually thereafter in accordance with the fire code, or at an interval not exceeding the manufacturer’s installation instructions, whichever is less. Testing shall verify compliance with the alarm set points and response times per Section 1106.11.10 and Section 1106.11.11. [ASHRAE 15:8.13.9]

• CMC § 3.3.34 Medium relevance — show source text

  (3) The air passages of listed self-contained systems.

  Duct, Environmental Air. Ducting used for conveying air at temperatures not exceeding 250°F (121°C) to or from occupied areas of any occupancy through other than heating or air-conditioning systems, such as ventilation for human usage, domestic kitchen range exhaust, bathroom exhaust ducts, locker room exhaust ducts, shower room exhaust ducts, janitor’s closet exhaust ducts, and domestic-type clothes dryer exhaust ducts.

  Duct, Grease. A containment system for the transportation of air and grease vapors that is designed and

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  DEFINITIONS

  Electrical Code. The National Electrical Code promulgated by the National Fire Protection Association, as adopted by this jurisdiction. [HCD 1 & HCD 2] Whenever the term “Electrical Code” is used in this code, it shall mean the Cal- ifornia Electrical Code, Title 24, Part 3.

  Emergency Alarm System. A system intended to provide notification and warning of abnormal conditions and summon appropriate aid.

  Emergency Control Station. An approved location on the premises where signals from emergency equipment are received.

  Enforcing Agency. [HCD 1, HCD 2, SFM, OSHPD 1, 1R, 2, 3, 4, 5 & 6] “Enforcing Agency” is the designated department or agency as specified by statute and regulation.

  Energy Recovery Ventilation (ERV) System. A device intended to provide outdoor ventilation air, and in the process transfer energy between the intake and exhaust airstreams for the purpose of preheating, precooling, humidifying, or dehumidifying outdoor ventilation air prior to supplying such air to a conditioned space.

  Engineering Methods. Design methods that rely on the application of mathematics, sciences, empirical evidence, and engineering principles. [NFPA 54:3.3.34]

  Equipment. A general term including materials, fittings, devices, appliances, and apparatus used as part of or in connection with installations regulated by this code.

  Evaporative Cooler. A device used for reducing the sensible heat of air for cooling by the process of evaporation of water into an airstream.

  Evaporative Cooling System. Equipment intended or installed for the purpose of environmental cooling by an evaporative cooler from which the conditioned air is distributed through ducts or plenums to the conditioned space or zone.

  Evaporator. Part of a refrigeration system in which liquid refrigerant is vaporized to produce refrigeration.

  Excess Flow Valve (EFV). A valve designed to activate when the fuel gas passing through it exceeds a prescribed flow rate. [NFPA 54:3.3.98.3]

  Expansion Tank. A vessel used to protect closed systems from excessive pressure.

  208.0 – F –

  Fabrication Area (Fab Area). An area within a Group H Occupancy semiconductor fabrication facility and related research and development areas in that there are processes involving hazardous production materials. Such areas are allowed to include ancillary rooms or areas such as dressing rooms and offices that are directly related to the fab area

  processes.

• CMC § 104.2 Medium relevance — show source text

  PORTABLE

  Cooling unit . . . . . . . . . . . . . . . . . . . . . . . . 104.2, 218.0

  Evaporative cooler . . . . . . . . . . . . . . . . . . . 104.2, 218.0

  Fire extinguishers . . . . . . . . . . . . . . . . . . . 513.2, 513.11

  Heating appliance . . . . . . . . . . . . . . . . . . . 104.2, 203.0

  Ventilating equipment. . . . . . . . . . . . . . . . . 104.2, 218.0

  POSITIVE DISPLACEMENT COMPRESSOR

  Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1112.2

  POWER BOILER PLANT

  Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0

  PRESSURE

  Design, definition . . . . . . . . . . . . . . . . . . . . . . . . . 218.0

  Field test, definition . . . . . . . . . . . . . . . . . . . . . . . . 218.0

  Imposing element, definition . . . . . . . . . . . . . . . . . 218.0

  Limiting devices. . . . . . . . . . . . . . . . . . . . . 218.0, 904.5,

  926.4, 1111.0, 1308.9.6

  Relief devices . . . . . . . . . . . . . . . . 218.0, 904.7, 1112.0,

  1113.0, 1115.4, C 109.1

  Tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D 113.6.2

  Test, definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0

  Vessel . . . . . . . . . . . . . . . . . . . . . . . .218.0, Chapter 10,

  1113.0, 1117.0

  Vessel, refrigerant . . . . . . . . . . . . .218.0, 1113.0, 1117.0

  PRESSURE-RELIEF VALVE

  Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224.0

  Discharge . . . . . . . . . . 1005.2, 1112.10, 1112.11, 1206.2

  Hydronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1206.0

  Pressure vessels . . . . . . . . . . . . . . . . . . 1005.0, 1113.0,

• CMC § 608.9.1 Medium relevance — show source text

  608.9.1 Refrigerants other than ammonia. A detector, or a sampling tube that draws air to a detector, shall be provided at an approved location where refrigerant from a leak is expected to accumulate. The system shall be designed to initiate audible and visible alarms inside of and outside each entrance to the refrigerating machinery room and transmit a signal to an approved location where the concentration of refrigerant detected exceeds the lesser of the following:

  1. The corresponding TLV-TWA values shown in the California Mechanical Code for the refrigerant classification.
  2. Twenty-five percent of the lower flammable limit (LFL).

  Detection of a refrigerant concentration exceeding the upper detection limit or 25 percent of the lower flammable limit (LFL), whichever is lower, shall stop refrigerant equipment in the machinery room in accordance with Section 608.10.1.

  608.10 Remote controls. Where flammable refrigerants are used and compliance with Section 1106 of the California Mechanical Code is required, remote control of the mechanical equipment and appliances located in the machinery room as required by Sections 608.10.1 and 608.10.2 shall be provided at an approved location immediately outside the machinery room and adjacent to its principal entrance.

  608.10.1 Refrigeration system emergency shutoff. A clearly identified switch of the break-glass type or with an approved tamperresistant cover shall provide off-only control of refrigerant compressors, refrigerant pumps and normally closed automatic refrigerant valves located in the machinery room. Additionally, this equipment shall be automatically shut off when the refrigerant vapor concentration in the machinery room exceeds the vapor detector’s upper detection limit or 25 percent of the LEL, whichever is lower.

  608.10.2 Ventilation system. A clearly identified switch of the break-glass type or with an approved tamper-resistant cover shall provide on-only control of the machinery room ventilation fans.

  608.11 Emergency pressure control system. Permanently installed refrigeration systems in machinery rooms containing more than 6.6 pounds (3 kg) of flammable, toxic or highly toxic refrigerant or ammonia shall be provided with an emergency pressure control system in accordance with Sections 608.11.1 and 608.11.2.

  608.11.1 Automatic crossover valves. Each high- and intermediate-pressure zone in a refrigeration system shall be provided with a single automatic valve providing a crossover connection to a lower pressure zone. Automatic crossover valves shall comply with Sections 608.11.1.1 through 608.11.1.3.

  608.11.1.1 Overpressure limit set point. Automatic crossover valves shall be arranged to automatically relieve excess system pressure to a lower pressure zone if the pressure in a high- or intermediate-pressure zone rises to within 90 percent of the set point for emergency pressure relief devices.

  608.11.1.2 Manual operation. Where required by the fire code official, automatic crossover valves shall be capable of manual operation.

  608.11.1.3 System design pressure. Refrigeration system zones that are connected to a higher pressure zone by an automatic crossover valve shall be designed to safely contain the maximum pressure that can be achieved by interconnection of the two zones.

  608.11.2 Automatic emergency stop. An automatic emergency stop feature shall be provided in accordance with Sections 608.11.2.1 and 608.11.2.2.

• CMC § 1220.4.2 Medium relevance — show source text

  8|1220.4.2 – 1220.4.6| |1221.7|1221.6| |1308.2 – 1308.4.1|1308.3 – 1308.5.1| |Table 1308.3.1|Table 1308.4.1| |1308.4.2|1308.5.2| |1308.4.2.2 – 1308.6.4|1308.5.2.1 – 1308.7.3| |Table 1308.4.6.2|Table 1308.5.6.2| |1308.6.5 – 1308.13.1|1308.7.7 – 1308.14.1| |1312.1.2 – 1312.1.3|1312.1.1 – 1312.1.2| |Chapter 17|Appendix F| |Chapter 18|Chapter 17| |D 103.2|D 103.1| |E 503.5.6.7|E 503.5.6.6| |E 503.5.7.2 – E 503.5.7.6|E 503.5.7.1 – E 503.5.7.5| |Table E 503.5.7.2|Table E 503.5.7.1| |Table E 503.5.7.6|Table E 503.5.7.5| |Table E 503.5.10.1.2(1)|Table E 503.5.10(1)| |Table E 503.5.10.1.2(2)|Table E 503.5.10(2)| |E 503.5.10.1.2|E 503.5.10| |E 503.5.10.2 – E 503.5.10.2.2|E 503.5.10.1 – E 503.5.10.1.2| |E 503.5.12.1|E 503.5.12| |E 503.5.12.2|E 503.5.12.1| |E 503.6.5.4|E 503.6.5.4.1|

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  Uniform Mechanical Code – 2024 Edition:

  The Uniform Mechanical Code contains complete requirements for the installation and maintenance of heating, ventilating, cooking and refrigeration systems.

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• CMC § 608.1 Medium relevance — show source text

  SECTION 608—MECHANICAL REFRIGERATION

  [M] 608.1 Scope. Refrigeration systems shall be installed in accordance with the California Mechanical Code .

  608.1.1 Refrigerants other than ammonia. Where a refrigerant other than ammonia is used, refrigeration systems and the buildings in which such systems are installed shall be in accordance with ASHRAE 15.

  608.1.2 Ammonia refrigeration. Refrigeration systems using ammonia refrigerant and the buildings in which such systems are installed shall comply with IIAR 2 for system design; IIAR 6 for inspection, testing and maintenance; and IIAR 7 for operating procedures. Decommissioning of ammonia refrigeration systems shall comply with IIAR 8, and engineering practices for existing ammonia refrigeration systems shall be in accordance with IIAR 9.

  608.2 Permits. An operational permit shall be obtained for refrigeration systems as set forth in Section 105.5.46.

  [M] 608.3 Refrigerants. The use and purity of new, recovered and reclaimed refrigerants shall be in accordance with the California Mechanical Code .

  [M] 608.4 Refrigerant classification. Refrigerants shall be classified in accordance with the California Mechanical Code .

  [M] 608.5 Change in refrigerant type. A change in the type of refrigerant in a refrigeration system shall be in accordance with the California Mechanical Code .

  608.6 Access. Access to refrigeration systems having a refrigerant circuit containing more than 220 pounds (100 kg) of Group A1 or 30 pounds (14 kg) of any other group refrigerant shall be provided for the fire department at all times as required by the fire code official.

  608.7 Testing of equipment. Refrigeration equipment and systems having a refrigerant circuit containing more than 220 pounds (100 kg) of Group A1 or 30 pounds (14 kg) of any other group refrigerant shall be subject to periodic testing in accordance with Section 608.7.1. Records of tests shall be maintained. Tests of emergency devices or systems required by this chapter shall be conducted by persons trained and qualified in refrigeration systems.

  6-10 2025 CALIFORNIA FIRE CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  BUILDING SERVICES AND SYSTEMS

  608.7.1 Periodic testing. The following emergency devices or systems shall be periodically tested in accordance with the manufacturer’s instructions and as required by the fire code official.

  1. Treatment and flaring systems.
  2. Valves and appurtenances necessary to the operation of emergency refrigeration control boxes.
  3. Fans and associated equipment intended to operate emergency ventilation systems.
  4. Detection and alarm systems.

  608.8 Emergency signs. Refrigeration units or systems having a refrigerant circuit containing more than 220 pounds (100 kg) of Group A1 or 30 pounds (14 kg) of any other group refrigerant shall be provided with approved emergency signs, charts and labels in accordance with NFPA 704. Hazard signs shall be in accordance with the California Mechanical Code for the classification of refrigerants listed therein.

  608.9 Refrigerant detection. Machinery rooms shall be provided with a refrigerant detector with an audible and visible alarm. Where ammonia is used as the refrigerant, detection shall comply with IIAR 2. For refrigerants other than ammonia, refrigerant detection shall comply with Section 608.9.1.

• CMC § 150.0 Medium relevance — show source text

  150.0(m)4, 150.0(m)6, 160.3(b)5, 160.3(c)2 Filter 120.1(c)1, 150.0(m)12, 150.0(m)13B, T, Table 150.0-B, C, 150.1(c)7, 150.2(b)1F, 150.2(b)1M, 160.2(b)1, 160.3(b)5, Table 160.3-A, Table 160.3-B, 170.2(c)3B, 180.2(b) Filtration 120.1(c)1, 140.4(e)1, 140.9(c)3B, 150.0(m)12, 150.0(o)1D, 150.2(b)1, 160.2(b)1, 160.2(b)2A, 160.2(c)1, 170.2(c)4C, 180.2(b)5 Handler 120.2(i), 120.4(a), 120.4(g), 120.5(a)12, 140.4(e)1, 141.0(b)2D, 141.0(b)2E, 150.0(a), 150.0(m)1, 150.0(m)11, 150.0(m)13, 150.0(o)1B, 150.1(b)3B, 150.1(c)1, 150.1(c)9, Table 150.1-A, 150.2(b)1C, 150.2(b)1D, 150.2(b)1E, 160.2(b)2A, 160.3(a)2H, 160.3(b)5A,160.3(b)5K-L, 160.3(c)2, 170.1(d)2, 170.2(c)3B, 4C, Table 170.2-K, 180.2(b)2 Infiltration 110.6(a)1, 150.0(m)1B, 160.3(b)5A Leakage 10-111(a), 110.6(a)1, 110.7, 140.3(a)9, 140.4(b)5, 141.0(b)2Q, 150.0(a)3, 150.0(k)1C, 150.0(m)7, 150.1(b)3B, 160.1(a)1, 160.3(b)G, 160.5(a)1C, 170.1(d)2H, 170.2(c)2E

  Permeance 140.3(a)9 Quality classification 120.1(g)7, 160.2(c)8G Release valve 110.3(c)4A Sealing 150.2(a)1A, 180.1(a)1A Supply 120.2(f), 120.6(e)4, 140.4(d)2, 160.3(a)2E, 170.2(c)4B Ventilation 10-103.2(b)1B, 10-103.2(c)3B, 120.1(a)2, 120.1(d)4, 120.1(f)2, 120.5(a)1, 140.4(b)4, 150.0(o)1B, 160.

• CMC § 607.4.1 Medium relevance — show source text

  607.4.1 Design standards. The design, fabrication and assembly of system components shall be suitable for the working pressures, temperatures and structural stresses to be encountered by the components.

  607.4.2 Components in contact with heated oil. System components that come in contact with heated cooking oil shall be rated for the maximum operating temperatures expected in the system.

  607.5 Tank venting. Normal and emergency venting shall be provided for cooking oil storage tanks.

  607.5.1 Normal vents. Normal vents shall be located above the maximum normal liquid line, and shall have a minimum effective area not smaller than the largest filling or withdrawal connection. Normal vents shall be permitted to vent inside the building.

  607.5.2 Emergency vents. Emergency relief vents shall be located above the maximum normal liquid line, and shall be in the form of a device or devices that will relieve excessive internal pressure caused by an exposure fire. For nonmetallic tanks, the emergency relief vent shall be allowed to be in the form of construction. Emergency vents shall be permitted to vent inside the building.

  607.6 Heating of cooking oil. Electrical equipment used for heating cooking oil in cooking oil storage systems shall be listed to UL 499 and shall comply with the California Electrical Code . Use of electrical immersion heaters shall be prohibited in nonmetallic tanks.

  607.7 Electrical equipment. Electrical equipment used for the operation of cooking oil storage systems shall comply with the Cali- fornia Electrical Code.

  SECTION 608—MECHANICAL REFRIGERATION

  [M] 608.1 Scope. Refrigeration systems shall be installed in accordance with the California Mechanical Code .

  608.1.1 Refrigerants other than ammonia. Where a refrigerant other than ammonia is used, refrigeration systems and the buildings in which such systems are installed shall be in accordance with ASHRAE 15.

  608.1.2 Ammonia refrigeration. Refrigeration systems using ammonia refrigerant and the buildings in which such systems are installed shall comply with IIAR 2 for system design; IIAR 6 for inspection, testing and maintenance; and IIAR 7 for operating procedures. Decommissioning of ammonia refrigeration systems shall comply with IIAR 8, and engineering practices for existing ammonia refrigeration systems shall be in accordance with IIAR 9.

  608.2 Permits. An operational permit shall be obtained for refrigeration systems as set forth in Section 105.5.46.

  [M] 608.3 Refrigerants. The use and purity of new, recovered and reclaimed refrigerants shall be in accordance with the California Mechanical Code .

  [M] 608.4 Refrigerant classification. Refrigerants shall be classified in accordance with the California Mechanical Code .

  [M] 608.5 Change in refrigerant type. A change in the type of refrigerant in a refrigeration system shall be in accordance with the California Mechanical Code .

  608.6 Access. Access to refrigeration systems having a refrigerant circuit containing more than 220 pounds (100 kg) of Group A1 or 30 pounds (14 kg) of any other group refrigerant shall be provided for the fire department at all times as required by the fire code official.

• CMC § 0.04 Medium relevance — show source text

  DEFINITIONS

  Power Boiler Plant. One or more power steam boilers or power hot water boilers and connecting piping and vessels within the same premises.

  Power Ventilator, Dryer Exhaust Duct. A fan used to boost airflow through a clothes dryer duct.

  PP. Polypropylene.

  Pressure, Design. The maximum allowable pressure for which a specific part of a system is designed. Pressure, Design (Refrigeration). The maximum allowable pressure for which a specific part of a refrigeration system is designed.

  Pressure, Field Test. A test performed in the field to prove system tightness.

  Pressure-Imposing Element. A device or portion of the equipment used for the purpose of increasing the pressure of the refrigerant vapor.

  Pressure-Limiting Device. A pressure-responsive mechanism designed to automatically stop the operation of the pressure-imposing element at a predetermined pressure.

  Pressure-Relief Device. A pressure-actuated valve or rupture member or fusible plug designed to automatically relieve excessive pressure.

  Pressure Test. The minimum gauge pressure to which a specific system component is subjected under test condition. Pressure Vessel (Unfired). A closed container, having a nominal internal diameter exceeding 6 inches (152 mm) and a volume exceeding 1 [1] ⁄ 2 cubic feet (0.04 m [3] ), for liquids, gases, vapors subjected to pressures exceeding 15 psi (103 kPa), or steam under a pressure.

  Pressure Vessel, Refrigerant. A refrigerant-containing receptacle that is a portion of a refrigeration system, but shall not include evaporators, headers, or piping of certain limited size and capacity.

  Process Piping. Piping or tubing that conveys liquid or gas, which is used directly in research, laboratory, or production processes.

  Property Line. A line of record that divides one lot or parcel from another lot or parcel or from a public or private street or any other public space. For the purposes of separation distances for building openings and device terminations on walls abutting a public way, the effective property line shall be the centerline of the public way.

  Public Way. A street (with or without a sidewalk), alley, or walkway not adjacent to a street, that is accessible to the general public.

  Purge. The acceptable method of scavenging the combustion chamber, boiler passes, and breeching to remove combustible gases.

  PVC. Polyvinyl chloride.

  219.0 – Q –

  Qualified. A competent and capable person or company that has met the requirements and training for a given field acceptable to the Authority Having Jurisdiction.

  Quick-Disconnect Device, Fuel Gas. A hand-operated device that provides a means for connecting and disconnecting an appliance or an appliance connector to a gas supply and that is equipped with an automatic means to shut off the gas supply when the device is disconnected. [NFPA 54:3.3.27.3]

  220.0 – R –