Z Installation requirements for oil- and gas-fired appliances in manufactured homes

Transcription

1 Z Installation requirements for oil- and gas-fired appliances in manufactured homes Z Draft Version 2, 6 January 2014 for TC Members Use Only 1

2 Z Installation requirements for oil- and gas-fired appliances in manufactured homes 1 Scope 1.1 This Standard applies to the factory installation of oil- and gas-fired appliances, equipment, components, accessories, piping and tubing in manufactured homes and specially designed or modified units. Note: Specially designed or modified units include industrial or commercial trailers.1.2 In CSA Standards, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; should is used to express a recommendation or that which is advised but not required; may is used to express an option or that which is permissible within the limits of the standard; and can is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application. 2 Reference publications This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments and addenda published thereto. CSA (Canadian Standards Association) CAN1-1.1-M81 (R2006) Domestic gas ranges B (R2009) Installation code for oil-burning equipment B (R2008) Oil-burning equipment: General requirements B (R2011) Vapourizing-type oil burners CAN/CSA-B Oil burners; atomizing-type Z Draft Version 2, 6 January 2014 for TC Members Use Only 2

3 B (R2011) Pressure atomizing oil burner nozzles B (R2011) Oil burning stoves and water heaters CAN/CSA-B Oil-fired warm air furnaces B (R2010) Oil-burning equipment: Steam and hot water boilers B (R2011) Portable industrial oil-fired heaters B (R2011) Portable liquid fuelled catalytic appliances B Portable pressurized type liquid petroleum fuelled camp stoves CAN3-B M86 (R2011) Portable kerosine-fired heaters B M1979 (R2006) Portable pressurized-type, liquid petroleum fuelled lamps and lanterns B Oil-fired warm-air heating appliances for mobile housing and recreational vehicles CAN/CSA-B M89 (R2010) Oil/gas-fired commercial/industrial pressure washers and steam cleaners B (R2008) Oil-burning equipment: Service water heaters for domestic hot water, space heating, and swimming pools B M1979 (withdrawn) Automatic flue-pipe dampers for use with oil-fired appliances CAN/CSA-B Natural gas and propane installation code CAN/CSA-B Propane storage and handling code ANSI/CSA (American National Standards Institute/Canadian Standards Association) ANSI Z Household cooking gas appliances ANSI Z /CSA Gas-fired central furnaces ANSI Z /CSA Z Draft Version 2, 6 January 2014 for TC Members Use Only 3

4 Gas water heaters Volume I, Storage water heaters with input ratings of 75,000 Btu per hour or less ANSI Z /CSA (R2011) Refrigerators Using Gas Fuel ANSI Z /CSA Connectors for gas appliances ANSI Z /CSA Gas clothes dryers Volume I, Type I clothes dryers ASME (The American Society of Mechanical Engineers) B (R2001) Pipe Threads, General Purpose, Inch B Malleable Iron Threaded Fittings: Classes 150 and 300 ASTM International (American Society for Testing and Materials) A53/A53M-06a Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless A (withdrawn) Standard Specification for Electric-Resistance-Welded Coiled Steel Tubing for Gas and Fuel Oil Lines B75M-99 (2005) Standard Specification for Seamless Copper Tube [Metric] B88M-05 Standard Specification for Seamless Copper Water Tube [Metric] CGA (Canadian Gas Association) 2.17-M91 (R2003) Gas-Fired Appliances for Use at High Altitudes 9.2-M88 (R2009) Manually Operated Shut-Off Valves for Gas Piping Systems ULC (Underwriters Laboratories of Canada) CAN/ULC-S642-M87 (R2000) Compounds and Tape for Threaded Pipe Joints 3 Definitions In addition to the definitions specified in CSA Z , the following definitions shall apply in this Standard: Accessory a part that is capable of performing one or more independent functions and is certified separately from and contributes to the operation of the appliance or appliances that it serves. Z Draft Version 2, 6 January 2014 for TC Members Use Only 4

5 Appliance a device to convert gas into energy (including any component, control, wiring, piping, or tubing required to be part of the device). Certified (with respect to an appliance, component, or accessory, or to the manufacturer s installation instructions) investigated by a certification body and determined to be meeting the requirements of recognized standards or meeting accepted test result criteria. Component an essential part of an appliance. Direct vent (sealed combustion) appliance an appliance constructed so that all of the combustion air is supplied directly from, and the products of combustion are vented directly to, the outdoors by an independent enclosed passageway connected directly to the appliance. Readily accessible capable of being reached quickly for operation renewal (resetting), servicing, or inspection without requiring a person to climb over or remove an obstacle or use a portable ladder. Roof jack that portion of a manufactured home heater flue or vent assembly (including the cap, insulating means, flashing, and ceiling plate) located in and above the roof of a manufactured home. 4 General requirement Except as otherwise provided in this standard, appliances,, components, equipment, and materials used in gas- and oil-fired appliance installations shall comply with CAN/CSA-B149.1, CAN/CSA-B149.2 and CSA B139 as applicable regardless of limits to application in those standards related to mobile homes. Note: Note: The National Building Code of Canada references CSA B139.1 and CAN/CSA-B The exceptions provided in CSA B139.1 and CAN/CSA-B149.1 for mobile homes do not apply to manufactured homes. The provisions in this Standard are in addition to or exceptions to the requirements to the National Building Code of Canada, CSA B139.1 and CAN/CSA-B (6) Appliances 5.1 Appliance Standards (Z clause 4.1) Oil-fired appliances Oil-fired appliances and associated equipment shall meet the applicable requirements of the CSA B140 series of Standards (6.1 to 6.4) Gas-fired appliances Gas-fired appliances shall comply with the standards identified in Table 1. Z Draft Version 2, 6 January 2014 for TC Members Use Only 5

6 Appliance Cooking appliances Table 1 Gas-fired appliance standards (See Clause 5.1.2) Standards CSA CAN1-1.1 or ANSI Z Refrigerators ANSI Z /CSA 1.4 Clothes dryers ANSI Z21.5.1/CSA 7.1 Furnaces ANSI Z21.47/CSA 2.3 Water heaters ANSI Z /CSA (6.5) Space-heating and water-heating gas-fired appliances for high altitudes Where the home is to b installed at an altitude greater than 610 m, space-heating and water-heating gas-fired appliances shall be certified to the applicable requirements of CGA Approval (Z /4.2) Use of appliances in manufactured homes As applicable, appliances shall be approved by the regulatory authority having jurisdiction for use in manufactured homes (Z /4.11) Conversion Oil-fired appliances shall not be converted from one fuel to another except in accordance with the terms of their approval. 5.3 (6.6) Appliance installation general (6.6.1) Installed components Appliance installation shall include all required components with which they are certified (6.10, Z /4.5) Installation and operating instructions The manufacturer shall leave appliance installation and operating instructions in the manufactured home (6.6.2, Z /4.6) Securement Appliances shall be secured in place to avoid displacement and movement from vibration and road shock. 5.4 (6.7) Access (6.7.1, Z /4.8.1) Access for servicing and removal Appliances shall be installed in such a way that they are readily accessible and removable for cleaning, inspection, repair, adjustment, and replacement of components and accessories without removal of any permanent construction of the manufactured home (6.7.2) Observation of flame zone Provision shall be made to permit adequate observation of the flame zone. Z Draft Version 2, 6 January 2014 for TC Members Use Only 6

7 5.4.4 (6.7.3) External access (Z /4.10.2(b)) Access for servicing or removal of non-direct vent oil-fired space- and water heating appliances shall be from the outside of a manufactured home Where access for servicing or removal of a space- or water- heating appliance is from the outside of a manufactured home, the fasteners securing the access panel or door shall be not more than 1.25 m above the floor of the manufactured home (6.7.4) Internal access Where access for servicing or removal of a gas-fired water heater is from the inside of a manufactured home, a securely fastened access panel that creates an effective seal for preventing migration of gas or combustion products into the living quarters shall be provided. A warning label in accordance with Clause 12.5, shall be prominently attached to the access panel. 5.5 (6.8, Z /4.9) Clearances Clearances between an appliance and adjacent combustible material shall not be less than the clearance specified on the appliance or 25 mm, whichever is greater, Note: Additional clearances allow for possible shifting or distortion of the appliance. They also allow access to the area around the appliance for cleaning. 5.6 (6.9) Location (6.9.2, Z /4.10.2) Location of non-direct vent furnaces and water heaters Furnaces and water heaters that are non-direct vent appliances shall be installed in an airtight enclosure ventilated to the air outside the manufactured home. 6 (7) Air supply for non-direct vent appliances 6.1 (7.2, Z /5.1) Combustion air for appliances other than furnaces and hot water appliances A warning label as specified inclause 11.2 shall be placed next openings installed to provide required combustion air. Note: (Z /5.3). CSA B139 requires that combustion air be provided to the burners of built-in surface oil-fired cooking units 7 (8) Venting 7.1 (8.1.1) Outlet site Oil- and gas-fired appliances shall not vent products of combustion underneath the manufactured home. Z Draft Version 2, 6 January 2014 for TC Members Use Only 7

8 7.2 (8.1.2) Installation General Vents, roof jacks, and special fittings certified as component parts of an appliance shall be installed in accordance with the terms of the appliance certification. Joints in the venting system located within the structure of the manufactured home shall be readily accessible for field inspection (8.2) Roof jack extension When a vent is to be extended in the field, the lower portion of the roof jack assembly (inner and outer) shall be mechanically fastened to the appliance at the manufactured home factory and the portion protruding through the roof shall be complete in every respect, including roof sealing. The vent opening shall be weather capped until the final assembly is installed. A warning label as specified in Clause 12.2 shall be placed in a conspicuous location next to the appliance. Note: Roof jack extensions may be shipped with the home for field installation. 7.3 (8.1.5) Vent type Except for gas-fired clothes dryers, a single-wall metal vent shall not be used unless it is a component part of a certified appliance. 8 (Z /7) Oil tanks and piping systems 8.1 (Z /7.1) On-site installation instructions Installation instructions for oil tanks and piping systems installed on site shall be provided by the manufacturer to the contractor, who shall comply with local fuel oil installation codes. 8.2 (Z /7.2) Access Suitable access for routing oil lines shall be provided without the need to pass through ducts or vents. 8.3 (Z /4.3) Protection Oil lines shall be protected from mechanical damage by guards or by appropriate location. 9 Piping, tubing, and fittings for gas systems 9.1 Application Clause 9 applies to piping and tubing and fittings for gas-fired appliances 9.2 (9.4) Piping, tubing and valves (9.4.1) Piping and tubing size - general The piping system shall be sized for natural gas (9.2.7) Flexible connector length When flexible metal connectors are used, such connectors shall be: (a) a minimum length of 1220 mm when used on for the installation of ranges, and Z Draft Version 2, 6 January 2014 for TC Members Use Only 8

9 (b) a minimum length of 1220 mm when used for the installation of refrigerators and dryers (9.2.8) Shut-off valve The individual low-pressure gas shut-off valves required by Clause shall be certified to CGA Piping installation for gas systems Note: This Clause governs installation of gas piping certified with a manufactured home but does not apply to piping certified as a component of an appliance Application Clause 10 applies to installation of piping for gas-fired appliances Connections (10.2) Appliance connections for shipment Gas appliances to be installed by a manufactured home manufacturer may be connected in the factory to a complete gas piping system terminating at the perimeter of the manufactured home for connection to a fuel supply Disconnection and reconnection (10.3) Disconnection for shipment After leak testing in accordance with Clause 11.1, the gas piping system, including the vertical risers to each appliance, may be disconnected as a sub-assembly for shipment. The vertical gas risers shall be disconnected upstream of the gas shut-off valve. Joints shall be fitted with dust caps or equivalent protection during shipment (13) Reconnection instructions When gas supply piping is disassembled as a sub-assembly in the factory for shipment, manufacturers shall include complete instructions for reattachment of the sub-assembly on site, including (a) proper support of the piping in accordance with Clause ; and (b) on-site pressure and leak testing in accordance with Clause (10.13) Gas-tight outlet When an appliance is not connected to an outlet of a piping system, the outlet shall be made tight as follows: (a) when the gauge pressure does not exceed 3.5 kpa: (i) nipple and cap; or (ii) threaded metal plug; and (b) when the gauge pressure exceeds 3.5 kpa: a shut-off valve, which shall be securely closed and made gas-tight with a cap or threaded metal plug Gas line, piping, tubing and connection locations (10.6) Gas line installation through chassis Gas lines may be routed through the chassis if the (a) area is not used for heating ducts or return air ducts; (b) area does not contain insulation; Z Draft Version 2, 6 January 2014 for TC Members Use Only 9

10 (c) area is vented to the outside air; and (d) gas lines and connections are readily accessible for inspection and replacement (10.11) Furnace gas supply line A gas line supplying a manufactured home furnace may be routed through a combustion air or fresh air makeup opening in the furnace base if (a) the gas line through the furnace base consists of a single piece of pipe or tube; and (b) connections to the line are 50 mm above the level of the top of the furnace base plate and 50 mm below the lowest level of the floor or furnace base plate extension (10.9) Branch line connections A branch line shall be connected to the supply piping or tubing only in an area vented to the outside and gas-tight to the inside Piping projection The unthreaded portion of piping outlet shall extend not more than 150 mm, through a floor (10.12). Securement All parts of a gas supply assembly shall be designed and secured so as to prevent the parts from working loose during transit Protection (10.12) Protection of lines beneath home Gas lines located beneath a manufactured home shall be firmly fastened and protected from damage by mechanical means or by location (10.7) Protection of lines at penetrations When a gas line passes directly through a wall, floor, ceiling, or partition, it shall be protected by grommets that fit snugly to the gas line and the hole through which the gas line passes. Grommets shall be securely held in position and prevent abrasion or damage to the gas line from vibration. Grommets shall be made of rubber, plastic, leather, or a similar material, but not of metal (10.20) Protection of gas supply inlet The gas supply inlet shall be capped or plugged with a threaded cap or plug on completion of manufacture of the manufactured home to exclude entry of foreign matter (10.15) Pressure and leak testing Gas systems shall be pressure leak tested in accordance with Clause 11. Testing may be conducted at the manufacturer s premises on completion of assembly. 11 Pressure and leak testing for gas systems 11.1 Factory testing Gas systems shall be pressure- and leak-tested prior to shipping 11.2 (11.5) On-site testing When a gas piping sub-assembly disconnected for shipment in accordance with Clause is reattached on site, the piping system shall be Z Draft Version 2, 6 January 2014 for TC Members Use Only 10

11 (a) pressure tested according to CAN/CSA-B149.1 except that (i) the pressure need not exceed normal working pressure, and (ii) duration need not exceed 10 min,, and (b) leak tested according to CAN/CSA-B Markings 12.1 Marking classifications The following classifications apply to the warning label markings specified in Clauses 12.2 to 12.5: (a) Class I (integral marking): a marking that is embossed, cast, stamped, or otherwise formed in the part. (b) Class II (permanent plate): a plate that is made of metal at least 0.3 mm thick and securely attached by mechanical means. (c) Class III (permanent label): a label that is made of a material not adversely affected by water and attached using a non-water-soluble adhesive. Class III labels should not be located on surfaces whose temperatures exceed 80 C. Note: A list of acceptable materials can be found in the CSA International directory for Accepted Adhesive-Type Labels, Label Stock Materials and Printing Systems in the CSA Certified Product Listings at Ventilation warning labels Ventilation warning label for gas The warning label required by Clause 6.1 shall be a Class II or Class III marking with dimensions of at least 40 mm 75 mm. The label shall read as follows (modified as necessary to identify the applicable appliance or appliances): TO ENSURE A SUPPLY OF FRESH AIR TO OCCUPANTS, OPEN OR TURN ON VENTILATORS WHEN FUEL-BURNING RANGE,, AND/OR FUEL-BURNING LIGHTS ARE IN OPERATION Note: Users should be aware that jurisdictions in Canada may require equivalent text in French. The equivalent French wording is AFIN D ASSURER UNE ALIMENTATION D AIR FRAIS AUX OCCUPANTS, OUVRIR OU METTRE EN MARCHE LES VENTILATEURS LORSQUE LA CUISINIÈRE FONCTIONNE ET LORSQUE LES LAMPES À COMBUSTIBLE SONT ALLUMÉES (Z /5.2) Ventilation warning label for oil The warning label required by Clauses 6.2 and 6.3 shall be a Class II or Class III marking with dimensions of at least 45 mm 75 mm shall read as follows (modified as necessary to identify the applicable appliance or appliances): TO ENSURE A SUPPLY OF FRESH AIR TO OCCUPANTS, OPEN VENTILATORS WHEN FUEL-BURNING RANGE AND/OR FUEL-BURNING LIGHTS ARE IN OPERATION Note: Users should be aware that jurisdictions in Canada may require equivalent text in French. The equivalent French wording is POUR ASSURER UNE ALIMENTATION EN AIR FRAIS AUX OCCUPANTS, METTRE LES VENTILATEURS EN MARCHE LORSQUE LA CUISINIÈRE FONCTIONNE ET (OU) QUE LES LAMPES À COMBUSTIBLE SONT ALLUMÉES. Z Draft Version 2, 6 January 2014 for TC Members Use Only 11

12 12.3 Warning label for gas supply systems A warning for gas supply systems shall be inscribed on a Class III marking with dimensions of at least 110 mm 145 mm. The label shall be located in a readily visible location and printed as shown in Figure 1. Note: Users should be aware that jurisdictions in Canada may require equivalent text in French Warning label for roof jack extension The manufactured home shall have a Class III label advising occupants that the roof jack extension needs to be installed before the occupants attempt to operate the appliance. Note: Users should be aware that jurisdictions in Canada may require equivalent text in French Warning label for indoor access panel The warning label required by Clause shall be a Class III label that reads as follows: WARNING: TO AVOID POSSIBLE HAZARD OF ASPHYXIATION, THE GAS-FIRED WATER HEATER IN THIS ENCLOSURE SHALL NOT BE OPERATED WITHOUT THIS ACCESS PANEL IN PLACE AND SECURELY ATTACHED Note: Users should be aware that jurisdictions in Canada may require text in French. The equivalent French wording is AVERTISSEMENT : AFIN D ÉVITER TOUT RISQUE D ASPHYXIE, LE CHAUFFE-EAU À GAZ DANS CE BÂTI NE DOIT PAS ÊTRE MIS EN MARCHE SANS AVOIR MIS EN PLACE ET FIXÉ SOLIDEMENT LE PANNEAU D ACCÈS. Z Draft Version 2, 6 January 2014 for TC Members Use Only 12

13 WARNING PIPING THIS SYSTEM IS DESIGNED FOR USE WITH EITHER PROPANE OR NATURAL GAS. VENTILATION AROUND PROPANE CYLINDERS REQUIRES PERIODIC REMOVAL OF DEBRIS. BEFORE TURNING ON GAS (A) BE CERTAIN APPLIANCES ARE SUITABLE FOR GAS TO BE USED. REFER TO NAMEPLATE ON EACH GAS APPLIANCE FOR CORRECT DATA. (B) 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 (A) ALL CONNECTIONS, INCLUDING THOSE AT THE APPLIANCES AND CYLINDERS, SHOULD BE LEAK TESTED PERIODICALLY WITH SOAPY WATER BY THE OCCUPANT. NEVER USE A LIGHTED MATCH OR OTHER FLAME WHEN CHECKING FOR LEAKS. (B) DO NOT LEAVE SYSTEM TURNED ON OR CONTAINERS CONNECTED UNTIL SYSTEM HAS BEEN PROVEN TO BE GASTIGHT. (C) LIGHT ALL PILOTS. WHEN GAS SUPPLY IS DISCONNECTED SECURELY CAP GAS INLET INTO MANUFACTURED HOME. AVERTISSEMENT CANALISATION CETTE INSTALLATION EST CONÇUE POUR ÊTRE ALIMENTÉE AU PROPANE OU AU GAZ NATUREL. LA VENTILATION AUTOUR DES BOUTEILLES DE PROPANE NÉCESSITE L ENLÈVEMENT PÉRIODIQUE DES DÉCHETS. AVANT D OUVRIR LE GAZ (A) S ASSURER QUE LES APPAREILS CONVIENNENT AU GAZ QUI DOIT ÊTRE UTILISÉ. CONSULTER LA PLAQUE SIGNALÉTIQUE DE CHAQUE APPAREIL POUR LES RENSEIGNEMENTS APPROPRIÉS. (B) VÉRIFIER L ÉTANCHÉITÉ DE TOUS LES RACCORDS DE GAZ, LA FERMETURE DE TOUS LES ROBINETS D APPAREILS ET L OBTURATION DE TOUTES LES SORTIES NON RACCORDÉES. APRÈS AVOIR OUVERT LE GAZ (A) L OCCUPANT DOIT VÉRIFIER PÉRIODIQUEMENT L ÉTANCHÉITÉ DE TOUS LES RACCORDS, Y COMPRIS CEUX DES APPAREILS ET DES BOUTEILLES, EN Y APPLIQUANT DE L EAU SAVONNEUSE. NE JAMAIS SE SERVIR D UNE ALLUMETTE OU D UNE FLAMME QUELCONQUE POUR LA DÉTECTION DES FUITES. (B) NE PAS LAISSER L ALIMENTATION OUVERTE NI LES RÉCIPIENTS RACCORDÉS, AVANT DE S ÊTRE ASSURÉ DE L ÉTANCHÉITÉ DE L INSTALLATION. (C) ALLUMER TOUTES LES VEILLEUSES. LORSQUE L ALIMENTATION DE GAZ EST DÉCONNECTÉE S ASSURER QUE L ORIFICE D ALIMENTATION DE LA MAISON MANUFACTURÉE EST FERMÉE AU MOYEN D UN BOUCHON ÉTANCHE. Figure 1 Sample warning label for gas supply system (See Clause 12.3.) Z Draft Version 2, 6 January 2014 for TC Members Use Only 13