Specifies the uniform minimum requirements for manufacturers, designers, regulatory authorities, testing laboratories and similar organizations for the safety, performance and use of overhead radiant tube gas heaters intended for use with natural gas, town gas, tempered liquefied petroleum gas and liquefied petroleum gas.
Table of contents
Header
About this publication
Preface
1 Scope and definitions
1.1 Scope
1.2 Definitions
2 Design and construction
2.1 General
2.1.1 Individual component or specification study
2.1.2 Physical inspection
2.1.3 Certification of safety components
2.1.4 Programmable electronic systems (PES)
2.1.5 Manual shut off valves
2.1.6 Classification of safety shut off valves
2.1.7 Requirements for electrical components and their installation
2.1.8 Sharp edges
2.1.9 Continuation of satisfactory operation
2.1.10 Protection of vitreous enamel
2.1.11 Means of support
2.1.12 Compliance in alternative forms
2.1.13 Locking means for adjusting devices
2.1.14 Alteration of programmed ignition
2.1.15 Locking of dampers
2.1.16 Means for gas pressure adjustment
2.1.16.1 Means to allow the gas pressure to be measured
2.1.16.2 Pressure test points
2.1.17 Protection of bearings
2.1.18 Construction of primary aeration controls
2.2 Materials and Standards
2.2.1 Suitability of materials and finishes
2.2.2 Materials in contact with gas
2.2.3 Materials containing asbestos
2.2.4 Materials used in appliances
2.2.5 Zinc based alloys
2.2.6 Components to be placed in a flame
2.2.7 Protection of aluminium tubing
2.2.8 Construction of primary aeration controls
2.2.9 Outdoor appliances—protection against corrosion
2.2.10 Compression fittings
2.3 Electrical systems
2.3.1 Accessibility to electrical components
2.3.2 Connection of electrical components
2.3.3 Plug and socket connections
2.3.4 Protection against accidental contact
2.3.5 Provision of electrical lead and plug
2.3.6 Protection of controls for and wiring—outdoor installation
2.3.7 Details of bearings
2.4 Installation requirements
2.4.1 Fixing of gas inlet connection
2.4.2 Gas inlet connection thread
2.4.3 Access to gas connection
2.4.4 Means for mounting
2.5 Maintenance requirements
2.5.1 Special tools
2.5.2 Dismantling and replacement
2.5.3 Insertion and removal of gas injectors
2.5.4 Assembly and attachment of handles, dials and pointers
2.5.5 Accessibility for adjustment
2.5.6 Accessibility for replacement
2.5.7 Threaded connections
2.5.8 Inaccessible nuts or bolts
2.6 Pressure regulators
2.6.1 Provision of pressure regulators
2.6.2 Positioning of regulators
2.7 Gas controls and flame safeguards
2.7.1 Accessibility by the user
2.7.2 Accidental changes of setting
2.7.3 Indication of function
2.7.4 Fitting of safety shut off system
2.7.5 Main burner automatic shut off valves
2.8 Combustion air supply and controls
2.8.1 Combustion air supply equipment
2.8.2 Combustion air flow proving interlock
2.8.3 Prevention of combustion air backflow
2.9 Ignition, pilots and main burners
2.9.1 Pilot burner shut off
2.9.2 Viewing of burner flames
2.9.3 Proving ignition
2.9.4 Support of pilot burners, igniters and flame sensing devices
2.9.5 Location of burner mixing tubes
2.9.6 Burner supports
2.9.7 Fixing of gas manifolds
2.9.8 Protection of ports and injectors
2.9.9 Restriction on gauze over primary air ports
2.9.10 Aeration adjustments for universal LPG appliances
2.10 Flueing requirements
2.10.1 Design of air entry and combustion product discharge
2.10.2 Design of flue connection—blockage
2.10.3 Design of flue connection—compatibility
2.10.4 Design of flue connection—engagement
2.11 Markings
2.11.1 Label related to domestic use
2.11.2 Markings on packaging—installation
2.11.3 Gas type label
2.11.4 Gas type colour code
2.11.5 Identification of injectors
2.11.6 Direction of rotation of fans
2.11.7 Other permanent markings on appliances
2.11.8 Markings of doors and covers
2.11.9 Marking of parts that may affect combustion
2.12 Instructions
2.12.1 Installation
2.12.1.1 Instructions attached to the appliance
2.12.2 Operating
2.12.2.1 Operating instructions supplied with appliance
2.12.2.2 Abnormal operation, maintenance schedule, service and replacement parts
2.12.2.3 Warning statement
2.12.3 Servicing
2.12.3.1 Servicing instructions remaining with the customer
3 Preliminary tests – Line gases
3.1 General requirements
3.1.1 Nominal gas consumption
3.1.2 Test gases
3.2 Preparation for testing
3.2.1 Electrical safety requirements
3.2.2 Setting up the appliance for testing
3.2.3 Appliance regulator not to be removed during testing
3.2.4 Protection from accidental draughts
3.2.5 Prevention of gas rate variation
3.2.6 Gas pressure and gas volume test equipment
3.3 Gas leakage
3.3.1 Gas tightness
3.3.2 Gas tightness after testing
3.3.3 Control of bleed lines
3.4 Gas consumption
3.4.1 Tolerance on determined gas consumption
3.4.2 Determined gas consumption of continuously burning pilots
3.5 Gas pressure regulators
3.5.1 Pressure regulator performance
3.6 Ignition and flame safeguard systems
3.6.1 All ignition and flame safeguard systems
3.6.1.1 Aerated pilots
3.6.1.2 Ignition at reduced pilot rate
3.6.1.3 Multi-port pilots
3.6.1.4 Holding time for thermoelectric flame safeguard
3.6.1.5 Flame safeguard
3.6.1.6 Flame travel at ignition
3.6.1.7 Cessation of ignition spark
3.6.1.8 Commencement of ignition after purge period
3.6.1.9 Proving of start flame
3.6.1.10 Flame safeguard system—self check
3.6.1.11 Flame failure
3.6.1.12 Flame establishment period—intermittent pilot
3.6.1.13 Flame safeguard system—shut off time
3.6.2 Atmospheric burners with automatic burner ignition systems — additional requirements
