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(1) Containers shall be installed with as much road clearance as practicable but not less than the minimum road clearance of the vehicle under maximum spring deflection. This clearance shall be measured to the bottom of the container, or to the lowest fitting, support or attachment on the container or container housing, whichever is lower.
(2) Fuel containers and container carriers shall be securely mounted to prevent jarring loose and slipping or rotating, and the fastenings shall be designed and constructed to withstand without permanent visible deformation static loading in any direction equal to four times the weight of the container filled with fuel. When containers are mounted within a vehicle, the securing of the container to the vehicle shall comply with this provision. Any hoods, domes or removable portions of the housing or cabinet shall be provided with means to keep them firmly in place in transit.
(3) All container valves, appurtenances and connections shall be adequately protected to prevent damage due to accidental contacts with stationary objects, from loose objects, stones, mud, or ice, thrown up from the ground or floor, and from damage due to overturn or similar vehicular accident. In the case of permanently mounted containers, this provision may be met by the location on the vehicle, with parts of the vehicle furnishing the protection. On portable (removable) containers the protection for container valves and connections shall be permanently attached to the container.
(d) Access to a compartment containing LP-gas tanks or cylinders shall be by a door or opening in the exterior wall of the commercial coach.
Access doors or panels of compartments shall not be equipped with locks or require special tools or knowledge to open. The compartment shall be ventilated with two vents having an aggregate area of not less than two percent of the floor area of the compartment and shall open unrestricted to the outside atmosphere. The required vents shall be equally distributed between the floor and ceiling of the compartment. If the bottom vent is located in the access door or wall, it shall not be located above the floor level of the compartment. The top vent shall be located in the access door or wall with the bottom of the vent not more than 12 inches below the ceiling level of the compartment. All vents shall have an unrestricted discharge to the outside atmosphere.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4422. Container Valves and Accessories.
(a) Containers and safety relief valves located less than 18 inches (457 mm) from any component of an internal combustion engine exhaust system shall be shielded by a vehicle frame member or by a noncombustible baffle to dissipate radiated or convected heat with an air space on both sides of the frame member or baffle.
(b) Listed two-stage regulators shall be supplied. Such regulators shall have a capacity not less than the total input of all LP-Gas appliances installed in the vehicle. Provisions shall be made for securely mounting the regulator by attaching it to the container valve, container, supporting standard, or vehicle wall. If the regulator is not mounted by the vehicle manufacturer, instructions for proper installation shall be provided. Regulators shall be installed so the regulator vent opening will not be affected by the elements such as by sleet, snow, freezing rain, ice, mud or by wheel spray.
(c) A listed LP-Gas excess flow valve shall be provided in accordance with the following:
1. The inlet or outlet of each service valve of a permanently mounted container shall be equipped with such a listed excess flow valve or a listed POL adapter with an integral excess flow valve.
2. Vehicles having removable (DOT) type containers shall have furnished or installed a listed POL adapter with an integral listed excess flow valve.
Note: Authority cited: Section 18022, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4423. LP-Gas Container Safety Relief Devices.
(a) DOT containers shall be provided with safety relief devices as required by the regulations of the U. S. Department of Transportation. ASME containers shall be provided with relief valves in accordance with Subsection 221 of the Standard for the Storage and Handling of Liquefied Petroleum Gases (NFPA No. 58-1976 (ANSI)). Safety relief valves shall have direct communication with the vapor space of the vessel.
(b) Final stage regulators shall be equipped on the low pressure side with one or both of the following:
(1) A relief valve having a start-to-discharge pressure setting of not less than 1.7 times and not more than 3 times the delivery pressure of the regulator.
(2) A shutoff device that shuts the gas off at the inlet side when the downstream pressure reaches the overpressure limits of not less than 1.7 times and not more than 3 times the delivery pressure of the regulator. Such a device shall not open to permit flow of gas until it has been manually reset.
(c) Systems installed outside of a vehicle shall be so located that discharge from safety relief devices shall be not less than 3 feet (0.9m) horizontally away from any openings into the vehicle and from all the internal combustion engine exhaust termination(s) below the level of such discharge. When a system is located in a recess vaportight to the inside, vent openings in such recess shall be not less than 3 feet (0.9m) horizontally away from any opening into the vehicle below the level of these vents.
Exceptions: Doors not having openable windows or screens below the level of the gas compartment vents are excepted from this requirement.
(d) Safety relief valves located within liquefied petroleum gas container compartments may be less than three feet from openings provided:
(1) The bottom vent of the compartment is at the same level or lower than the bottom of any opening into the vehicle, or
(2) The compartment is not located on the same wall plane as the opening(s) and is at least two feet horizontally from such openings.
Note: Authority cited: Section 18022, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4424. Container Mounting.
(a) Housings and enclosures shall be designed to provide proper ventilation at least equivalent to that specified in Section 4421.
(b) Doors, hoods, domes or portions of housings and enclosures required to be removed or opened for replacement of containers shall incorporate means for clamping them firmly in place and preventing them from working loose during transit.
(c) Provisions shall be incorporated in the assembly to hold the containers firmly in position and prevent their movement during transit.
(d) Containers shall be mounted on a substantial support or a base secured firmly to the commercial coach chassis. Neither the container nor its support shall extend below the axle.
s 4425. System Design and Service-Line Pressure.
(a) Systems shall be of the vapor-withdrawal type.
(b) Vapor, at a pressure not over 18 inches water column, shall be delivered from the container into the gas-supply connection.
(c) Container openings for vapor withdrawal shall be located in the vapor space when the container is in service or shall be provided with a suitable internal withdrawal tube which communicates with the vapor space in or near the highest point in the container when it is mounted in service position, with the commercial coach on a level surface. Containers shall be permanently and legibly marked in a conspicuous manner on the outside to show the correct mounting position and the position of the service outlet connection. The method of mounting in place shall be such as to minimize the possibility of an incorrect positioning of the container.
s 4426. Electrical Equipment.
All electrical equipment installed in conjunction with gas equipment shall be listed for the purpose intended.
s 4428. Gas Piping Systems.
The requirements of this article shall govern the installation of all gas-piping systems attached to any commercial coach. The requirements of this article applicable to gas-piping systems shall not apply to piping designated as an integral part of an appliance or to gas appliance connectors.
s 4429. Piping Design.
Commercial coaches requiring fuel gas for any purpose shall be equipped with a gas-piping system that is designed for LP gas only, combination LP-natural-gas or natural gas.
s 4430. Materials.
All materials used for the installation, extension, alteration or repair of any gas-piping system shall be new and free from defects or internal obstructions. It shall not be permissible to repair defects in gas piping or fittings. Inferior or defective materials shall be removed and replaced with acceptable material. The system shall be made of materials having a melting point of not less than 1,450 degrees F., except as provided in Section 4436. They may consist of one or more of the following materials.
(a) Steel or wrought-iron pipe shall comply with ANSI Standard B36.10-1970 for Wrought-Steel and Wrought-Iron Pipe. Threaded brass pipe in iron pipe sizes may be used.
(b) Fittings for gas piping shall be wrought iron, malleable iron, steel or brass (containing not more than 75 percent copper).
(c) Copper tubing shall be annealed type, grade K or L, conforming to the Specifications for Seamless Copper Water Tube (ASTM B88-72), or shall comply with the Specifications for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service, (ASTM B280-73). When used on systems designed for natural gas, such tubing shall be internally tinned.
(d) Steel tubing shall have a minimum wall thickness of 0.032 inch for tubing of 1 /2 inch diameter and smaller and 0.049 inch for diameters 1 /2 inch and larger. Steel tubing shall be constructed in accordance with ASTM Specification for Electrical-Resistance-Welded Coiled Steel Tubing for Gas and Fuel Oil Lines, (ASTM A539-73), and shall be externally corrosion protected.
s 4431. Expandable or Multiple Commercial Coaches.
Where gas piping is to be installed in more than one portion of an expandable or multiple commercial coach, the design and construction shall be as follows.
(a) There shall be only one point of crossover between each unit which shall be readily accessible from the exterior of the commercial coach.
(b) The connector between units shall be a listed flexible connector for exterior use and sized in accordance with Section 4434 of this chapter.
(c) Protective caps or plugs shall be permanently attached to the coach by means of a metal chain and used to seal the system when not in use.
s 4434. Gas Pipe Sizing.
Gas piping systems shall be sized so that the pressure drop to any appliance inlet connection from any gas supply connection, when all appliances are in operation at maximum capacity, is not more than 0.5 inch water column as determined on the basis of test, or in accordance with Appendix CC-M-2. The natural gas supply connection(s) shall be not less than the size of the gas piping and/or not smaller than 3 /4 inch nominal pipe size.
s 4435. Joints for Gas Pipe.
All pipe joints in the piping system, unless welded or brazed, shall be screw threaded joints that comply with ANSI Standard Pipe Threads (except Dryseal) B 2.1 -1968. Right and left nipples or couplings shall not be used. Unions, if used, shall be of ground joint type. The material used for welding or brazing pipe connections shall have a melting temperature in excess of 1,000 degrees F. Pipe shall not be bent.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4436. Tubing Joints.
Tubing joints shall be made with either a single or a double flare of the proper degree, as recommended by the tubing manufacturer, or with other listed vibration-resistant fittings, or joints may be brazed with material having a melting point exceeding 1,000 degrees F. Metallic ball sleeve compression-type tubing fittings shall not be used.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4437. Concealed Tubing.
Tubing shall not be run inside walls, floors, ceilings or partitions. Where tubing passes through walls, floors, ceilings, partitions or similar installations, such tubing shall be protected by the use of weather-resistant grommets that shall snugly fit both the tubing and the hole through which the tubing passes.
s 4438. Pipe-Joint Compound.
Screw joints shall be made up tight with listed pipe-joint compound, insoluble in liquefied petroleum gas, and shall be applied to the male threads only.
s 4439. Concealed Joints.
No piping or tubing joints shall be located in any floor, wall, partition or similar concealed construction space.
s 4440. Couplings.
Where it is necessary to join sections of screw piping, right and left nipples and couplings shall not be used. Ground joint unions may be used to connect heat-producing appliances to the appliance branch piping.
s 4441. Hangers and Supports.
(a) All gas piping shall be supported by straps or hangers at intervals of not more than four feet, except where support is provided by structural members. The gas-supply connection shall be rigidly anchored to a structural member within six inches of the gas supply connection. Piping shall be installed so that it will not be subject to undue strains and stresses.
(b) Metallic gas piping straps or hangers shall be galvanized or equivalently protected metal.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4442. Electrical Ground.
Gas piping shall not be used for an electrical ground.
s 4443. Identification of Gas Supply Connections.
A label shall be permanently attached on the outside of the exterior wall of the commercial coach adjacent to the gas supply connection which reads (as appropriate either):
LP-Gas System
This gas piping system is designed for use of liquefied petroleum gas only.
DO NOT CONNECT NATURAL GAS TO THIS SYSTEM
CONTAINER SHUTOFF VALVES SHALL BE CLOSED DURING TRANSIT.
When connecting to lot outlet, use a listed gas supply connector, for mobile
homes, rated at
( ) 100,000 Btuh
or more.
( ) 250,000 Btuh
Before turning on gas, make certain all gas connections have been made tight,
all appliance valves are turned off, and any unconnected outlets are capped.
After turning on gas, test gas piping and connections to applicances for
leakage with soapy water or bubble solution, and light all pilots.
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Combination LP Gas and Natural Gas System
This gas piping system is designed for use of either liquefied petroleum gas or
natural gas.
NOTICE BEFORE TURNING ON GAS BE CERTAIN APPLIANCES
ARE DESIGNED FOR THE GAS CONNECTED AND ARE
EQUIPPED WITH CORRECT ORIFICES. SECURELY CAP THIS
INLET WHEN NOT CONNECTED FOR USE.
When connecting to lot outlet, use a listed
gas
supply connector, for mobile homes, rated at
( ) 100,000 Btuh
or more.
( ) 250,000 Btuh
Before turning on gas, make certain all gas connections have been made
tight, all appliance valves are turned off, and any unconnected outlets are
capped.
After turning on gas, test gas piping and connefctions to appliances for
leakage with soapy water or bubble solution, and light all pilots.
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The appropriate BTUH input rating shall be marked.
Note: See Article 1, Section 4031 for label size and type of material.
s 4444. Gas-Supply Connection Cap.
A protective cap or plug permanently attached to the vehicle shall be installed to effectively close the gas-supply connection when not in use on LP-gas, combination LP-natural or natural-gas-piping systems.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4445. Appliance Connections.
All gas-burning appliances shall be connected to the gas-piping system with materials as provided in Section 4430 or with listed gas appliance connectors. Gas appliance connectors shall not be run through walls, ceilings, floors or partitions. Aluminum tubing and connectors shall not be used in exterior locations.
s 4446. Appliance Shutoff Valves.
A shutoff valve shall be installed in the fuel-piping outside of each gas appliance within the vehicle, upstream of the union or connector in addition to any valve on the appliance. The shutoff valve shall be located within 6 feet of a cooking appliance and within 3 feet of any other appliance.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4450. Testing Before Appliances Are Connected.
Piping systems shall stand a pressure of at least six inches mercury or three-psi for a period of not less than ten minutes without showing any drop in pressure. Pressure shall be measured with a mercury manometer or slope gage or equivalent device calibrated so as to be read in increments of not greater than one-tenth pound. The source of pressure shall be isolated before the pressure tests are made.
Before test is begun, the temperature of the air and of the piping shall be the same, and constant air temperature shall be maintained throughout the test.
s 4451. Testing After Appliances Are Connected.
After appliances are connected, the piping system shall be pressurized to not less than 10 inches nor more than 14 inches water column and the appliance connections tested for leakage with soapy water or bubble solution.
s 4452. Leaks.
(a) Leaks in gas piping shall be located by applying soapy water to the exterior of the piping.
(b) Fire, ether or acid shall not be used to locate or repair leaks, nor shall any substance other than air be introduced into the gas piping.
(c) It shall not be permissible to repair defects in gas piping or fittings. Defective pipe or fitting shall be removed and replaced with sound material.
s 4453. Rodent Resistance.
All exterior openings around piping, ducts, plenums, chimneys and vents shall be sealed to resist the entrance of rodents.
s 4455. General.
The requirements of this article shall govern the installation of all oil piping systems attached to any commercial coach except piping approved as an integral part of the appliance.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4456. Expandable or Multiple Commercial Coaches.
When a commercial coach is composed of two or more units, or includes expandable rooms, the oil-piping system shall be located only in the unit containing the oil-supply connection.
s 4457. Materials.
All materials used for the installation extension, alteration, or repair of any oil piping system shall be new and free from defects or internal obstructions. The system shall be made of materials having a melting point of not less than 1,450 degrees F, except as provided in 4459. They shall consist of one or more of the following materials:
(a) Steel or wrought-iron pipe shall comply with American National Standard for Wrought-Steel or Wrought-Iron Pipe, B36.10-1970. Threaded copper or brass pipe in iron pipe sizes may be used.
(b) Fittings for oil piping shall be wrought iron, malleable iron, steel, or brass (containing not more than 75 percent copper).
(c) Copper tubing shall be annealed type, Grade K or L, conforming to the Specifications for Seamless Copper Water Tube (ASTM B88-72), or shall comply with the specifications for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service, (ASTM B280-73).
(d) Steel tubing shall have a minimum wall thickness of 0.032 inch for diameters up to 1 /2 inch and 0.049 inch for diameters 1 /2 inch and larger. Steel tubing shall be constructed in accordance with the Specification for Electric-Resistance Welded Coiled Steel Tubing for Gas and Fuel Oil Lines (ASTM A539-73) and shall be externally corrosion protected.
s 4458. Size of Oil Piping.
The minimum size of all fuel-oil tank piping connecting outside tanks to the appliances shall be no smaller than three-eighths-inch OD copper tubing or one-fourth-inch ips. In those cases where No. 1 fuel oil is used with an automatic pump (fuel lifter), one-fourth-inch OD copper tubing may be used if specified by the pump manufacturer.
s 4459. Joints for Oil Piping.
All pipe joints in the piping system, unless welded or brazed, shall be threaded joints that comply with ANSI Standards Pipe Threads (except Dryseal) B2.1 -1968. Right and left nipples or couplings shall not be used. Unions, if used, shall be of ground joint type. The material used for welding or brazing pipe connections shall have a melting temperature in excess of 1,000 degrees F.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4460. Tubing Joints.
Tubing joints shall be made with either a single or a double flare of the proper degree, as recommended by the tubing manufacturer, or with other listed vibration-resistant fittings, or joints may be brazed with material having a melting point exceeding 1,000 degrees F. Metallic ball sleeve compression-type tubing fittings shall not be used.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4461. Pipe-Joint Compound.
Threaded joints shall be made up tight with listed pipe-joint compound which shall be applied to the male threads only.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4462. Couplings.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4463. Grade of Piping.
Fuel-oil piping installed in conjunction with gravity feed systems to oil-heating equipment shall slope in a gradual rise upward from a central location to both the oil tank and the appliance in order to eliminate air locks.
s 4464. Hangers and Supports.
All oil piping shall be supported by galvanized or equivalently protected metal straps or hangers at intervals of not more than four feet, except where support is provided by structural members. The supply connection shall be rigidly anchored to a structural member within six inches of the supply connection. Piping shall be installed so that it will not be subject to undue strains and stresses.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4465. Testing for Leakage.
Before setting the system in operation, tank installations and piping shall be checked for oil leaks with fuel oil of the same grade that will be burned in the appliance. No other material shall be used for testing fuel-oil tanks and piping. Tanks shall be filled to maximum capacity for the final check for oil leakage.
s 4468. Oil Tanks.
Oil tanks and listed automatic pumps (oil lifters) installed for gravity flow of oil to heating equipment shall be installed so that the top of the tank is no higher than 8 feet above the appliance oil control and the bottom of the tank is not less than 18 inches above the appliance oil control.
s 4469. Auxiliary Oil-Storage Tank.
Oil-supply tanks affixed to a commercial coach shall be so located as to require filling and draining from the outside and shall be in a place readily available for inspection. If the fuel-supply tank is located in a compartment of a commercial coach, the compartment shall be ventilated at the bottom to permit diffusion of vapors and shall be insulated from the structural members of the body. Tanks so installed shall be provided with an outside fill and vent pipe and an approved liquid-level gage.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4470. Shutoff Valve.
A readily accessible listed manual shutoff valve shall be installed at the outlet of an oil-supply tank. The valve shall be installed to close against the supply.
s 4471. Fuel-Oil Filters.
All oil tanks, except for integrally mounted tanks, shall be equipped with a listed oil filter or strainer located downstream from the tank shutoff valve. The fuel-oil filter or strainer shall contain a sump with a drain for the entrapment of water.
s 4473. Appliances.
(a) All heat-producing appliances used in commercial coaches shall be specifically listed, labeled, or certified by an approved testing agency in accordance with nationally recognized standards, except as provided in these regulations. Heat-producing appliances, vents, and chimneys shall be installed in accordance with the terms of their listing and the manufacturer's instructions.
(b) In addition, appliances and equipment for heating of grease or other liquids shall be designed in such a manner that means are provided to prevent the spillage of liquids when the vehicle is in transit. This subsection shall become effective April 1, 1980.
(c) All fuel-burning appliances, except ranges, ovens, commercial food and heat-processing equipment, illuminating appliances, clothes dryers, solid fuel-burning fireplaces and fireplace stoves, shall be installed to provide for the complete separation of the combustion system from the interior atmosphere of the commercial coach. Combustion air inlets and flue gas outlets shall be listed or certified as components of the appliance. The required separation may be obtained by:
(1) The installation of direct vent system (sealed combustion system) appliances, or
(2) The installation of appliances within enclosures so as to separate the appliance combustion system and venting system from the interior atmosphere of the vehicle. There shall not be any door, removable access panel, or other opening into the enclosure from the inside of the vehicle. Any opening for ducts, piping, wiring, etc., shall be sealed.
(d) Solid fuel-burning factory-built fireplaces and fireplace stoves shall be listed for use in mobile structures and may be installed in commercial coaches provided they and their installation conform to the following:
(1) A fireplace or fireplace stove shall not be considered as a heating facility for determining compliance with thermal protection.
(2) A fireplace or fireplace stove, air intake assembly, hearth extension and the chimney shall be installed in accordance with the terms of their listings and their manufacturer's instructions.
(3) The fireplace or fireplace stove shall not be installed in a sleeping room.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4474. Fuel Conversion.
Heat-producing appliances shall not be converted from one fuel to another unless converted in accordance with the terms of their listing.
s 4475. Appliance Installation.
(a) A forced air appliance and its return-air system shall be designed and installed so that negative pressure created by the air-circulating fan cannot affect its or another appliance's combustion air supply or act to mix products of combustion with circulating air.
(b) The air circulating fan of a furnace installed in an enclosure with another fuel-burning appliance shall be operable only when any door or panel covering an opening in the furnace fan compartment or in a return air plenum or duct is in the closed position. This does not apply if both appliances are direct vent system appliances. (Sealed combustion)
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4475.2. Separation.
(a) The interior walls and ceiling of fuel-burning furnace and water heater enclosures, including access doors, shall be covered with 5 /16 inch thick gypsum board or equivalent protection.
(b) Exposed interior surfaces adjacent to cooking ranges shall have a flame-spread rating not exceeding 50. Adjacent surfaces are all exposed vertical surfaces between the range top and the overhead cabinets and/or ceiling and within 6 horizontal inches of the range.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Sections 18055 and 18058, Health and Safety Code.
s 4475.5. Clothes Dryer Installation.
(a) Clearance. Listed Type 1 clothes dryers shall be installed with a minimum clearance of 6 inches from adjacent combustible material, except that clothes dryers listed for installation at lesser clearances may be installed in accordance with their listing.
(b) Listed Type 2 clothes dryers shall be installed with clearances of not less than shown on the marking plate and in the manufacturer's instructions. Type 2 clothes dryers designed and marked "For use only in fire-resistive locations" shall not be installed elsewhere.
(c) Exhausting. Type 1 clothes dryers shall not be installed in bathrooms or bedrooms unless exhausted to the outside air.
Type 2 clothes dryers shall be exhausted to the outside air.
(d) Make-up Air. Provision for make-up air shall be provided for Type 2 clothes dryers, with a minimum free area of one square inch for each 1,000 Btu per hour total input rating of the dryer(s) installed.
(e) Exhaust Ducts. Type 1 and 2 clothes dryer exhaust ducts shall not be connected into any vent connector, gas vent, chimney, crawl space, attic or other similar concealed space.
Ducts for exhausting clothes dryers shall not be put together with sheet-metal screws or other fastening means which extend into the duct and which would catch lint and reduce the efficiency of the exhaust system.
(f) Exhaust ducts for Type 2 clothes dryers shall be constructed of sheet metal or other noncombustible material. Such ducts shall be equivalent in strength and corrosion resistance to ducts made of No. 24 galvanized sheet gage steel. Type 2 clothes dryers shall be equipped or installed with lint controlling means.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Sections 18055 and 18058, Health and Safety Code.
s 4475.7. Commercial Hoods and Kitchen Ventilation.
Except as provided in Article 3.5, of these regulations, all commercial hoods and kitchen ventilation systems shall be designed and installed in accordance with the Uniform Mechanical Code, 1976 edition, Chapter 20.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4476. Manufacturer's Instructions.
(a) Operating instructions shall be provided with the appliance.
(b) The installer shall leave the manufacturer's installation instructions with the appliance.
(c) Information on clearances, input ratings, lighting and shutdown shall be attached to the appliances with the same permanence as the nameplate, and so located that it is easily readable when the appliance is properly installed.
(d) Each fuel-burning appliance shall bear a permanent marking designating the type(s) of fuel for which it is listed.
s 4476.5. Safety Devices.
(a) All appliances shall be equipped with a listed device or devices which will shut off the fuel supply to the main burner or burners in the event of pilot or ignition failure. In addition, liquefied petroleum gas burning appliances shall be equipped with a listed automatic device or devices which will shut off the flow of gas to the pilot in the event of ignition failure.
Exception: Listed shutoff devices are not required for listed appliances not requiring such devices and specific industrial appliances as approved by the department.
(b) All storage-type water heaters, regardless of source of energy, in addition to the primary temperature control, shall be equipped with a listed temperature-limiting device installed in accordance with applicable standards.
(c) All storage-type water heaters, regardless of source of energy, shall be provided with a listed pressure-relief valve. Each pressure-relief valve shall be an automatic type with drain and shall be set at a pressure of not more than the maximum allowable working pressure of the water heater or system, whichever is lower.
(d) Relief valves shall be equipped with a full-size drain of material able to withstand 225 degrees F (107 degrees C) which shall extend to the outside of the vehicle with the end directed downward. No part of the relief drain shall be trapped. The terminal end shall not be threaded.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4477. Securing.
Every appliance shall be secured in place to avoid displacement and movement from vibration and road shock.
s 4478. Accessibility.
Every heat-producing appliance shall be accessible for inspection, service, repair and replacement without removing permanent construction. Sufficient room shall be available to enable the operator to observe the burner, controls and ignition means while starting the appliance.
s 4479. Clearances -General.
Clearances from heat-producing appliances to adjacent surfaces shall be not less than specified in the terms of their listing. Clearance spaces shall be framed in or guarded to prevent creation of storage space within the clearance specified.
s 4480. Venting.
Every appliance designed to be vented shall be connected to an approved venting system and vented to the outside of the vehicle. Venting systems shall not terminate beneath the vehicle.
(a) Venting systems shall be so designed and constructed as to develop a positive flow adequate to convey all combustion product to the outside atmosphere.
(b) A venting system which is an integral part of the vented appliance shall be installed in accordance with the terms of its listing, manufacturer's installation requirements, and applicable requirements of these regulations.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4481. Types of Venting Systems.
Venting of appliances shall be accomplished by one or more of the following:
(a) An integral vent system consisting entirely of listed components certified as part of the appliance.
(b) A vent system consisting entirely of listed or certified components, from the appliance outlet to the vent termination, installed in accordance with the appliance or vent manufacturer's installation instructions.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4482. Single-Wall Vents.
A single-wall metal vent or vent connector shall not be used unless listed or certified as a component part of the appliance.
s 4483. Appliance Air Supply.
Every heat-producing appliance shall be so installed as to assure a sufficient supply of fresh air for proper fuel combustion. Air supply inlet and outlet equipment, when installed, shall maintain the required separation of combustion, ventilation and dilution air from the interior atmosphere of the commercial coach. All air-supply inlet and outlet equipment shall be listed or certified as components of the appliance and installed in accordance with the appliance manufacturer's installation instructions.
s 4484. Vent Termination.
Vent openings shall not terminate less than three feet from any motor-driven air intake that terminates into the interior of the vehicle.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4485. Joints.
All joints and connections of any vent or vent-connector shall be made secure and tight.
s 4486. Roof Jacks.
Roof jacks shall be designed and installed to prevent either the ceiling or material from the ceiling cavity from extending below the ceiling line as indicated on the roof jack.
s 4490. Safety Devices.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4492. Air Supply Systems.
Supply ducts shall be made from galvanized steel, tinplated steel, or aluminum, or shall be listed Class 0, Class 1, or Class 2 air ducts. Class 2 air ducts shall be located at least 3 feet from the furnace bonnet or plenum. Ducts constructed from sheet metal shall be in accordance with Appendix Table CC-M-4.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4493. Joints and Seams of Ducts.
(a) Joints and seams of ducts shall be mechanically fastened and made substantially airtight. Slip joints shall have a contact lap of at least one inch and shall be mechanically fastened by sheet metal screws or equivalent method.
(b) Tapes shall be used for sealing joints and shall not be more combustible than listed flameproof fabric.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4494. Installation.
(a) Ducts shall be securely fastened in place and supported at least every four (4) feet.
(b) Fittings connecting the registers to the ducts system shall be constructed of metal or material which complies with the requirements of Class 0, 1, or 2 ducts under UL Standard 181.
(c) Registers shall be constructed of metal or conform with the following:
(1) Be made of materials classified 94V-0 or 94V-1 when tested as described in Underwriters' Laboratories, Inc. Standards for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances. UL 1976.
(2) Resist without structural failure a 200 lb. concentrated load on a 2 inch diameter disc applied to the most critical area of the exposed face of the register. For this test the register is to be at a temperature of not less than 165 F and is to be supported in accordance with the manufacturer's instructions.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4495. Expandable or Multiple Vehicle Ducts.
(a) An expandable or multiple vehicle may have ducts of the heating system installed in the various units. The points of connection must be so designed and constructed that when the vehicle is fully expanded or coupled, the resulting duct joint will conform to the requirements of this article.
(b) Crossover duct installations shall be designed to be effectively supported by the vehicle. The installation shall be designed to provide a minimum clearance of four inches between the bottom of the ducts and the ground.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4496. Sizing of Ducts.
Ducts shall be designed so that when a labeled forced air furnace is installed and operated continually at its normal input rating in the commercial coach, with all registers in fully opened position the static pressure measured in the duct plenum shall not exceed 90% of that shown on the label of the appliance. When a cooling coil is installed between the furnace and the duct plenum, the total static pressure between the furnace and the coil shall not exceed that shown on the label of the appliance. The minimum dimension of any branch duct shall be at least one and one-half inches, and of any main duct, two and one-half inches.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4497. Airtightness of Supply-Duct System.
A supply-duct system shall be considered substantially airtight when the static pressure in the duct system, with all registers sealed and with the furnace air circulator at high speed, is at least 80 percent of the static pressure measured in the furnace casing, with its outlets sealed and the furnace air circulator operating at high speed.
s 4498. Test Equipment.
For the purpose of Sections 4496 and 4497 pressures shall be measured with a water manometer or an equivalent device calibrated so as to read in increments of not greater than one-tenth-inch water column.
s 4498.5. Duct and Plenum Insulation.
Except for special purpose commercial coaches, every heating and cooling duct and plenum shall be installed in accordance with the following:
(a) Air supply ducts that are not within the coach insulation having an R factor of at least 4 shall be insulated.
(b) Supply ducts within the coach but not within the insulation described in (a) shall be insulated with rigid insulation having a thermal insulation (R) not less than 3 with a continuous vapor barrier having a perm rating of not more than 1.0.
(c) Supply ducts exposed directly to outside air, such as under chassis crossover ducts, shall be insulated with material having a thermal insulation (R) of not less than 4.0 with a continuous vapor barrier having a perm rating of not more than 1.0.
(d) Aluminum foil used as a vapor barrier shall be at least 2 mils in thickness.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4500. Circulating Air Systems.
Provisions shall be made to permit the return of circulating air from all rooms and living spaces to the circulating air supply inlet of the furnace.
(a) Duct Material. Return ducts and any diverting dampers contained therein shall be in accordance with the following:
(1) Circulating air supply shall be through ducts complying with Section 4492.
(2) Portions of return ducts directly above the heating surfaces, or closer than 2 feet from the outer jacket or casing of the furnace shall be con structed of metal in accordance with Appendix Table CC-M-4, or shall be listed Class 0 or Class 1 air ducts.
(b) Separation. There shall be a complete separation between any combustion air and circulating air supply.
(c) Air Requirements. The minimum unobstructed total area of the circulating air openings or ducts to a gravity-type warm-air furnace shall be not less than 7 square inches for each 1000 Btu/h approved rating or in accordance with the terms of listing and the manufacturer's installation instructions.
The minimum unobstructed total area of the circulating air openings or ducts to a blower-type warm-air furnace shall be not less than 2 square inches for every 1000 Btu/h approved output rating or bonnet capacity of the furnace.
The total area of the circulating air openings or ducts need not be larger than the minimum sized circulating air opening or openings, or in accordance with the terms of listing and the manufacturer's installation instruction.
(1) Dampers. Volume dampers shall not be placed in any warm-air furnace circulating air inlet in a manner which will reduce the required circulating air to the furnace.
(2) Ducts for Blower-type Warm-air Furnace. Circulating air for every fuel-burning blower-type warm-air furnace shall be conducted into the blower housing from outside the furnace space by continuous airtight ducts.
(d) Permanent Openings. Living areas not served by return-air ducts and which may be closed off from the return opening of a furnace by doors, sliding partitions or other means shall be provided with permanent uncloseable openings in the doors or separating partitions to allow circulated air to return to the furnace. Such openings may be grilled or louvered. The net free area of each opening shall be not less than one square inch for every five square feet of total living area which may be closed off from the furnace by the door or partition serviced by that opening.
(e) Prohibited Sources. The circulating air for a heating system shall not be taken from any of the following locations:
(1) Closer than 10 feet from any fuel-burning appliance vent outlet or plumbing vent opening, unless such vent outlet is 3 feet above the circulating air inlet.
(2) Where it will pick up objectionable odors, fumes or flammable vapors.
(3) A hazardous or insanitary location.
(4) From a room or space having any direct-fired, fuel-burning appliances therein, except fireplaces, fireplace stoves, household cooking appliances and Class 1 clothes dryers.
(f) Screen. Every required circulating air inlet from outside the vehicle shall be covered with screen having 1 /4-inch openings.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4501. Return-Air Ducts.
s 4501.5. Duct Material.
s 4501.7. Dampers.
All dampers installed in the heating or air conditioning systems of commercial coaches shall be listed.
s 4502. Permanent Openings.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4505. Air Conditioning or Comfort Cooling Equipment.
All air-conditioning or comfort-cooling equipment shall be listed, labeled or certified by an approved testing agency and installed in accordance with the terms of their listing and the manufacturer's instructions.
s 4506. Installation.
Cooling coils installed as a portion of, or in connection with, any forced-air furnace shall be installed on the downstream side unless specifically otherwise listed.
No refrigerant evaporator or cooling coil shall be located in the air discharge duct of any forced-air furnace unless such furnace is listed for use with a cooling coil or is listed for operation at not less than .5-inch water column static pressure.
s 4507. Separation.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4509. Circulating Air Supply.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4510. Duct System.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
s 4511. Duct and Plenum Insulation.
Note: Authority cited: Section 18020, Health and Safety Code. Reference: Section 18055, Health and Safety Code.
Appendix CC-M-1
Table CC-M-1
Standards for Heating, Cooling and Fuel-Burning
Appliances, Pipe and Fittings, Systems, etc.
Type ANSI UL Other Standards
Appliances
Automatic Ice-Making Equipment.... NSF-12-1978
Commercial Cooking Equipment
Exhaust Systems................... NSF-33
Commercial Cooking and
Hot Food Storage Equipment........ NSF-4-1978
Commercial Gas Baking and
Roasting Ovens.................... Z21.28-1974 [FNa1]
Type ANSI UL Other
Standards
Commercial Gas-Fired and
Electrically-Heated
Hot Water Generating Equipment....... NSF-5-1978
Commercial Powered Food
Preparation Equipment................ SF-8-1978
Commercial Spray Dishwashing
Machines............................. NSF-3-1978
Dispensing Freezers.................. NSF-6-1978
Factory-Built Fireplaces and
Fireplace Stoves..................... A-131.3-1971 UL-127-1971
GAL
Food Service Equipment............... NSF-2-1978
Food Service Refrigerators and
Storage Freezers..................... NSF-7-1978
Gas Counter Appliances............... Z21.31-1975
[FNa1]
Gas Clothes Dryer,
Type 1.............................. Z21.5.1-1975
[FNa1]
Type 2.............................. Z21.5.2-1974
Gas-Fired Absorption
Air Conditioners..................... Z21.40-1973
[FNa1]
Gas-Fired Direct Make-up
Air Heaters.......................... Z21.83.4-1978
Gas-Fired Direct Vent
Cent. Furnaces....................... Z21.64-1978
Gas-Fired Duct Furnaces.............. Z21.34-1971
[FNa1]
Gas-Fired Gravity and Fan
Type Floor Furn...................... Z21.48-1976
[FNa1]
Gas-Fired Gravity and Fan Sealed
Comb. Wall Furn...................... Z21.44-1978
Gas-Fired Gravity and Forced Air
Cent. Furnaces....................... Z21.47-1978
Gas-Fired Illuminating Appliances.... Z21.42-1971
[FNa1]
Gas-Fired Kettles, Steam
Cookers and Gen...................... Z21.46-1974
[FNa1]
Gas-Fired Low Press. Steam and
Hot Water Boilers.................... Z21.13-1971
Gas Water Heaters, Auto, Storage
Type with Inputs of 75,000
BTUHor Less.......................... Z21.10.1-1975[FNa1] (continued)