1 - AS 5262-2011 LP GAS MOBILE INDUSTRIAL DIRECT FIRED AIR HEATERS
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 REFERENCED DOCUMENTS
7 - 1.3 DEFINITIONS
8 - 1.3.1 Appliance regulator
8 - 1.3.2 Approved
8 - 1.3.3 Authority
8 - 1.3.4 Authority having jurisdiction
8 - 1.3.5 Automatic burner
8 - 1.3.6 Automatic ignition
8 - 1.3.7 Automatic operation
8 - 1.3.8 Calibration
8 - 1.3.9 Certifying body
8 - 1.3.10 Combination gas control
8 - 1.3.11 Combustible construction
8 - 1.3.12 Combustion products
8 - 1.3.13 Cut-off
8 - 1.3.14 Determined gas consumption
9 - 1.3.15 Direct gas-fired air heater
9 - 1.3.16 Direct ignition device
9 - 1.3.17 Fitting
9 - 1.3.18 Flame abnormality
9 - 1.3.19 Flame detector
9 - 1.3.20 Flame establishment period
9 - 1.3.21 Flame failure response time
9 - 1.3.22 Flame proving period
9 - 1.3.23 Flame safeguard
9 - 1.3.24 Flame safeguard system
9 - 1.3.25 Flue gases
9 - 1.3.26 Forced draught burner
9 - 1.3.27 Gas
10 - 1.3.28 Heating value, gross (at constant pressure)
10 - 1.3.29 Hose assembly
10 - 1.3.30 Interlock
10 - 1.3.31 Intermittent pilot
10 - 1.3.32 Interrupted pilot
10 - 1.3.33 Limit device
10 - 1.3.34 Lockout
10 - 1.3.35 Lock-up pressure
10 - 1.3.36 Low gas pressure detector
10 - 1.3.37 LP Gas
11 - 1.3.38 Manual ignition
11 - 1.3.39 Mobile appliance
11 - 1.3.40 Nominal gas consumption
11 - 1.3.41 Nominal outlet pressure
11 - 1.3.42 Nominal test point pressure
11 - 1.3.43 Permanent pilot
11 - 1.3.44 Piezo electric ignition
11 - 1.3.45 Pilot
11 - 1.3.46 Programmable Electronic System (PES)
12 - 1.3.47 Programming flame safeguard
12 - 1.3.48 Rated working pressure
12 - 1.3.49 Regulator
12 - 1.3.50 Relative density
12 - 1.3.51 Safety shut-down
12 - 1.3.52 Safety shut-off system
12 - 1.3.53 Safety shut-off valve
12 - 1.3.54 Set pressure
12 - 1.3.55 Specific gravity
12 - 1.3.56 Stoichiometric combustion
12 - 1.3.57 Temperature limit device
12 - 1.3.58 Temperature sensing element
12 - 1.3.59 Thermostat
12 - 1.3.60 Thermostat bypass
13 - 1.3.61 Thermostat valve
13 - 1.3.62 Valve
13 - 1.3.63 Valve train
13 - 1.3.64 Vent limiter
13 - 1.3.65 Wobbe index
15 - SECTION 2 DESIGN AND CONSTRUCTION
15 - 2.1 GENERAL
15 - 2.1.1 Preliminary specification
15 - 2.1.2 Physical inspection
15 - 2.1.3 Certification of safety components
15 - 2.1.4 Programmable electronic systems
15 - 2.1.5 Manual shut-off gas valves
15 - 2.1.6 Compliance of electrical components
15 - 2.1.7 Fuel storage container
15 - 2.1.8 Sharp projections or edges
15 - 2.1.9 Safety, substantiality and durability
16 - 2.1.10 Displacement of parts
16 - 2.1.11 Means of support
16 - 2.1.12 Enclosures for gas trains
16 - 2.1.13 Burner valve train
16 - 2.1.14 Valve train components
16 - 2.1.15 Manual shut-off valve
16 - 2.1.16 Pipework
16 - 2.1.17 Support for manual shut-off valve
16 - 2.1.18 Construction of joints
16 - 2.1.19 Adjustable devices
17 - 2.1.20 Limit devices
17 - 2.1.21 Provision of positive locking devices
17 - 2.1.22 Prevention of manual contact with fan impeller
17 - 2.1.23 Gas pressure test point
17 - 2.2 MATERIALS AND STANDARDS
17 - 2.2.1 General
17 - 2.2.2 Materials in contact with gas
17 - 2.2.3 Strength, durability and suitability of materials
17 - 2.2.4 Zinc based alloys-general
17 - 2.2.5 Zinc based alloys-exposure to water vapour
17 - 2.2.6 Materials subject to heat or corrosion
18 - 2.2.7 Fittings
18 - 2.3 ELECTRICAL SYSTEMS
18 - 2.3.1 Accessibility to electrical components
18 - 2.3.2 Connection of electrical components
18 - 2.3.3 Protection of low voltage electrical components and wiring
18 - 2.3.4 Outdoor installation
18 - 2.3.5 Motor bearing suitability
18 - 2.3.6 Control circuit design
18 - 2.3.7 Failure of component
18 - 2.4 INSTALLATION REQUIREMENTS
18 - 2.5 MAINTENANCE REQUIREMENTS
18 - 2.5.1 Special tools
18 - 2.5.2 Dismantling and replacement by the operator
19 - 2.5.3 Insertion and removal of screw-in jets
19 - 2.5.4 Assembly and attachment of handles, dials and pointers
19 - 2.5.5 Accessibility for adjustment
19 - 2.5.6 Accessibility for replacement
19 - 2.5.7 Accessibility of pilot flame detector
19 - 2.5.8 Inaccessible nuts or bolts
20 - 2.6 PRESSURE REGULATORS
20 - 2.6.1 Provision of a pressure regulator
20 - 2.6.2 Type of pressure regulator
20 - 2.6.3 Provision of a separate pressure regulator
20 - 2.6.4 Provision of a vent limiting device
20 - 2.6.5 Positioning of pressure regulators
20 - 2.6.6 Adjustments on pressure regulators
20 - 2.7 GAS CONTROLS AND FLAME SAFEGUARDS
20 - 2.7.1 Accessibility of controls and working parts
20 - 2.7.2 Accidental change of settings of valves, dials and pointers
20 - 2.7.3 Markings for controls, dials and gauges
20 - 2.7.4 Indication of functions on manual gas valves
20 - 2.7.5 Type of manual shut-off valves
20 - 2.7.6 Use of limit devices
21 - 2.7.7 Provision of flame safeguard
21 - 2.7.8 Supervision of pilots
21 - 2.7.9 Main burner shut-off valves
21 - 2.7.10 Fitting of double block safety shut-off valve
21 - 2.7.11 Fitting of Class 1 valves
21 - 2.7.12 Start gas supply
21 - 2.7.13 Fitting of safety shut-off system
21 - 2.7.14 No bypassing of safety shut-off valve system
21 - 2.7.15 Protection of required safety controls
21 - 2.8 COMBUSTION AIR SUPPLY AND CONTROLS
21 - 2.8.1 Combustion air supply equipment
21 - 2.8.2 Combustion air flow proving interlock
22 - 2.9 IGNITION, PILOTS AND MAIN BURNERS
22 - 2.9.1 Provision of manual shut-off valve for pilot burner
22 - 2.9.2 Provision of manual shut-off valve for main burner
22 - 2.9.3 Viewing of burner flames
22 - 2.9.4 Ensuring burner or pilot is alight
22 - 2.9.5 Support of pilots, igniters and flame sensing devices
22 - 2.9.6 Securing of burners
22 - 2.9.7 Support of limit devices
22 - 2.9.8 Protection of ports and injectors
22 - 2.9.9 Design and location of means for ignition
22 - 2.9.10 Location of pilot burners
22 - 2.9.11 Aeration adjustment for Universal LP Gas appliances
23 - 2.10 MARKINGS
23 - 2.10.1 Provision of marking plate(s)
23 - 2.10.2 Information on marking plate(s)
23 - 2.10.3 Provision of wiring diagram
23 - 2.10.4 Provision of label relating to use
23 - 2.10.5 Provision of label relating to ventilation
23 - 2.10.6 Provision of warning label
24 - 2.10.7 Gas valve ‚OFF™ position
24 - 2.11 INSTRUCTIONS
24 - 2.11.1 General
24 - 2.11.2 Provision of operating instructions
24 - 2.11.3 Content of operating and servicing instructions
25 - 2.11.4 Dimensions
26 - SECTION 3 PRELIMINARY TESTS
26 - 3.1 GENERAL REQUIREMENTS
26 - 3.1.1 Introduction
26 - 3.1.2 Test gases
26 - 3.2 PREPARATION FOR TESTING
26 - 3.2.1 Electrical safety requirements (earth leakage)
26 - 3.2.2 Setting up appliance for testing
26 - 3.2.3 Appliance regulators not to be moved during testing
26 - 3.2.4 Protection from accidental draughts
27 - 3.2.5 Prevention of gas flow variation
27 - 3.2.6 Gas pressure and gas volume test equipment
27 - 3.3 GAS LEAKAGE
27 - 3.4 GAS CONSUMPTION
27 - 3.4.1 Tolerance on determined gas consumption
27 - 3.4.2 Determined gas consumption of permanent pilots
27 - 3.5 LOW GAS PRESSURE DETECTORS
27 - 3.5.1 Installation of low gas pressure detector
27 - 3.5.2 Function of low gas pressure detector
28 - 3.6 IGNITION AND SAFETY SHUT-OFF SYSTEMS
28 - 3.6.1 General
28 - 3.6.2 Ignition at reduced pilot rate
28 - 3.6.3 Flame travel with multi-port pilot
28 - 3.6.4 Gas igniting freely
28 - 3.6.5 No flames flashing outside the combustion chamber
28 - 3.6.6 Pilot burner stability under main burner operation
28 - 3.6.7 Prevention of flame simulation
28 - 3.6.8 Energizing of valves
28 - 3.6.9 Use of two flame detectors with intermittent or permanent pilot
28 - 3.6.10 Cessation of ignition spark
28 - 3.6.11 Check of integral circuitry in flame safeguard systems
28 - 3.6.12 Programming system
29 - 3.6.13 Lockout of gas supply
29 - 3.6.14 Flame failure
29 - 3.6.15 Shut-off time for safety shut-off system
30 - SECTION 4 COMBUSTION TESTS
30 - 4.1 INTRODUCTION
30 - 4.2 SATISFACTORY COMBUSTION
30 - 4.3 TESTING AT MANUFACTURER'S RATED AIR THROUGHPUT
30 - 4.4 TESTING AT AIR FLOW JUST IN EXCESS OF SETTING ON AIR FLOW DEVICE
31 - 4.5 COMBUSTION PRODUCTS LIMITS
32 - SECTION 5 PERFORMANCE TESTS
32 - 5.1 AIR DISCHARGE TEMPERATURE
32 - 5.2 COMBUSTION AIR SUPPLY
32 - 5.3 INTERLOCK SYSTEMS
32 - 5.3.1 General
32 - 5.3.2 Interlocks to ensure safe ignition conditions
32 - 5.3.3 Interlocks to ensure safe reignition conditions
33 - 5.4 SHUT-DOWN
33 - 5.4.1 Safety
33 - 5.4.2 Safety shut-down
33 - 5.5 TEMPERATURE HAZARDS
33 - 5.5.1 Temperature limits
34 - 5.5.2 Fitting of temperature limit device
34 - 5.6 HEAT RESISTANCE
34 - 5.7 SPECIFICATIONS
35 - APPENDIX A - FIGURES A1 TO A3
38 - APPENDIX B - METHODS OF TEST
38 - B1 M.O.T. 2.2.5-ZINC ALLOY TEST
38 - B1.1 Scope
38 - B1.2 Principle
38 - B1.3 Apparatus
38 - B1.4 Procedure
38 - B1.5 Result
39 - B2 M.O.T. 2.7/2.10-MARKINGS AND LABELS
39 - B2.1 Scope
39 - B2.2 Principle
39 - B2.3 Apparatus
39 - B2.4 Materials
39 - B2.5 Procedure
39 - B2.6 Result
40 - B3 M.O.T. 3.3.1/3.3.2-GAS LEAKAGE
40 - B3.1 Scope
40 - B3.2 Principle
40 - B3.3 Apparatus
40 - B3.4 Preparation of apparatus
40 - B3.5 Procedure
40 - B3.6 Result
41 - B4 M.O.T. 3.4.1-GAS CONSUMPTION
41 - B4.1 Scope
41 - B4.2 Principle
41 - B4.3 Apparatus
41 - B4.4 Materials
41 - B4.5 Preparation of apparatus
41 - B4.6 Procedure
41 - B4.7 Result
42 - B5 M.O.T. 3.6.1/3.6.2-IGNITION TESTS
42 - B5.1 Scope
42 - B5.2 Principle
42 - B5.3 Apparatus
42 - B5.4 Materials
42 - B5.5 Preparation of apparatus
42 - B5.6 Procedure
42 - B5.7 Result
43 - B6 M.O.T. 3.6.2-IGNITION OF A BURNER PROTECTED BY A FLAME SAFEGUARD
43 - B6.1 Scope
43 - B6.2 Principle
43 - B6.3 Apparatus
43 - B6.4 Materials
43 - B6.5 Preparation of apparatus
43 - B6.6 Procedure
43 - B6.7 Result
44 - B7 M.O.T. 3.6.15-OPERATION OF FLAME SAFEGUARD SYSTEM
44 - B7.1 Scope
44 - B7.2 Principle
44 - B7.3 Materials
44 - B7.4 Apparatus
44 - B7.5 Preparation of apparatus
44 - B7.6 Procedure
44 - B7.7 Result
45 - B8 M.O.T. 4.3/4.4/4.5(a) AND 3.5.2-OPERATION OF LOW GAS PRESSURE CUT-OFF DEVICE DETERMINATION OF CO, CO2, NO2...
45 - B8.1 Scope
45 - B8.2 Principle
45 - B8.3 Apparatus
45 - B8.4 Materials
45 - B8.5 Preparation of apparatus
46 - B8.6 Procedure
46 - B8.7 Result
47 - B9 M.O.T. 4.3/4.4/4.5(b)-DETERMINATION OF FORMALDEHYDE CONCENTRATION IN DISCHARGE PRODUCTS
47 - B9.1 Scope
47 - B9.2 Principle
47 - B9.3 Apparatus
47 - B9.4 Materials
48 - B9.5 Preparation of apparatus
48 - B9.6 Procedure
49 - B9.7 Result
50 - B10 M.O.T. 5.1-DISCHARGE TEMPERATURES
50 - B10.1 Scope
50 - B10.2 Principle
50 - B10.3 Apparatus
50 - B10.4 Materials
50 - B10.5 Preparation of apparatus
50 - B10.6 Procedure
50 - B10.7 Result
51 - B11 M.O.T. 5.2-FLAME ABNORMALITY ON PROGRESSIVE AIR SUPPLY RESTRICTION
51 - B11.1 Scope
51 - B11.2 Principle
51 - B11.3 Apparatus
51 - B11.4 Materials
51 - B11.5 Preparation of apparatus
51 - B11.6 Procedure
51 - B11.7 Result
52 - B12 M.O.T. 5.5.1-TEMPERATURE HAZARDS
52 - B12.1 Scope
52 - B12.2 Principle
52 - B12.3 Apparatus
52 - B12.4 Materials
52 - B12.5 Preparation of apparatus
52 - B12.6 Procedure
52 - B12.7 Result
54 - B13 M.O.T. 5.5.1(h)-TEMPERATURE HAZARDS-ELECTRIC MOTORS
54 - B13.1 Scope
54 - B13.2 Principle
54 - B13.3 Apparatus
54 - B13.4 Materials
54 - B13.5 Preparation of apparatus
54 - B13.6 Procedure
55 - B13.7 Calculations
55 - B13.8 Result
56 - B14 M.O.T. 5.5.2-HEATER CASING-MAXIMUM TEMPERATURE TEST
56 - B14.1 Scope
56 - B14.2 Principle
56 - B14.3 Apparatus
56 - B14.4 Materials
56 - B14.5 Preparation of apparatus
56 - B14.6 Procedure
56 - B14.7 Result
57 - B15 M.O.T. 5.6-HEAT RESISTANCE
57 - B15.1 Scope
57 - B15.2 Principle
57 - B15.3 Apparatus
57 - B15.4 Materials
57 - B15.5 Preparation of apparatus
57 - B15.6 Procedure
57 - B15.7 Result
58 - APPENDIX C - MAINTENANCE SCHEDULE AND SERVICING INSTRUCTIONS
58 - C1 GUIDELINES FOR SERVICING INSTRUCTIONS
58 - C2 MAINTENANCE SCHEDULE
60 - C3 WRITTEN APPLIANCE SPECIFICATIONS
63 - APPENDIX D - DETERMINATION OF FORMALDEHYDE CONCENTRATION IN DISCHARGE PRODUCTS
63 - D1 SOURCE
63 - D2 PREPARATION OF CHEMICAL SOLUTIONS
64 - D3 PREPARATION OF SOLUTIONS FOR TEST
64 - D4 PREPARATION OF A STANDARD CURVE
65 - APPENDIX E - AIR DISCHARGE SAMPLING AND TEMPERATURE MEASUREMENT
68 - APPENDIX F - APPLIANCE TEST REPORT