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SN EN 1458-1 : 2012
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DOMESTIC DIRECT GAS-FIRED TUMBLE DRYERS OF TYPES B22D AND B23D, OF NOMINAL HEAT INPUT NOT EXCEEDING 6 KW - PART 1: SAFETY
Hardcopy
01-01-2012
FOREWORD
1 Scope
2 Normative references
3 Definitions
3.1 Direct gas-fired tumble dryer
3.2 Gases
3.3 Conditions of operation and measurement
3.4 Appliance construction
3.5 Immobilizing an adjuster or a control
3.6 Appliance performance
3.7 Marking of the appliance and packaging
4 Classification
4.1 Classification of gases
4.2 Classification of appliances
5 Construction and design requirements
5.1 General
5.1.1 Conversion to different gases
5.1.2 Materials and method of construction
5.1.3 Screws
5.1.4 Maintenance and use
5.1.5 Thermal insulation
5.1.6 Gas connections
5.1.7 Soundness of the gas circuit
5.1.8 Supply of combusion air and evacuation
of combustion products
5.1.9 Lint collection
5.1.10 Flame visibility
5.1.11 Electrical equipment
5.1.12 Motors and fans
5.1.13 Operational safety in the event of
fluctuation, interruption and restoration
of the auxiliary energy
5.1.14 Combustion air flow failure
5.2 Requirements for adjusting, control and
safety devices
5.2.1 General
5.2.2 Automatic shut-off valves
5.2.3 Multifunctional controls
5.2.4 Flame supervision devices
5.2.5 Governors
5.2.6 Preset gas rate adjusters
5.2.7 Automatic burner control systems
5.2.8 Gas strainers
5.3 Ignition devices
5.3.1 General
5.3.2 Ignition burner or start-gas flame
establishment
5.3.3 Ignition burners
5.4 Ignition burner or start-gas flame establishment
5.5 Main flame establishment
5.5.1 Establishment by means of an ignition
burner or start-gas flame
5.5.2 Direct establishment of the main flame
e.g. spark ignition hot surface igniter
5.6 Burners
5.7 Thermostats and control of air temperature
5.7.1 General requirements
5.7.2 Overheat cut-off device
5.8 Clocks and timing devices
5.9 Pressure test points
5.10 Mechanical hazards
5.10.1 General
5.10.2 Requirements for appliances with an
opening dimension exceeding 30 cm and a
drum having a volume exceeding 100 dm
6 Operational safety
6.1 General
6.1.1 Characteristics of test gases: reference
and limit gases
6.1.2 Conditions for preparation of test gases
6.1.3 Practical application of test gases
6.1.4 Test pressures
6.1.5 Use of test gases
6.1.6 Test room
6.1.7 Preparation of the appliance
6.1.8 Test conditions
6.2 Screws
6.2.1 Requirements
6.2.2 Tests
6.3 Manually operated devices of the automatic
burner control system
6.3.1 Requirements
6.3.2 Tests
6.4 Mechanical hazards
6.4.1 General
6.4.2 Supplementary requirements and tests for
appliances with an opening dimension
exceeding 30 cm and a drum having a
volume exceeding 100 dm
6.5 Stability of appliances
6.5.1 General
6.5.2 Appliances with drop down doors
6.6 Soundness of the gas circuit
6.6.1 Requirements
6.6.2 Tests
6.7 Heat inputs
6.7.1 Nominal heat input
6.7.2 Reduced rate
6.7.3 Heat input of ignition burners
6.8 Burners
6.8.1 Resistance to overheating
6.8.2 Escape of unburnt gas
6.9 Limiting temperature of various parts of the
appliance
6.9.1 Requirements
6.9.2 Tests
6.10 Limiting temperature of floor, walls and worktops
6.10.1 Requirements
6.10.2 Tests
6.11 Limiting temperature of components
6.11.1 Normal operation
6.11.2 Severe operation
6.11.3 Abnormal operation
6.12 Motor temperatures
6.12.1 Motor bearings
6.12.2 Motor windings
6.13 Ignition, cross-lighting and flame stability
6.13.1 Ignition and cross-lighting
6.13.2 Flame stability
6.13.3 Supplementary requirements and tests
6.14 Flame supervision devices
6.14.1 Manual devices
6.14.2 Automatic devices
6.15 Governors
6.15.1 Requirements
6.15.2 Tests
6.16 Combustion
6.16.1 General
6.16.2 Requirements
6.16.3 Tests under normal conditions
6.16.4 Supplementary tests under special
conditions
6.17 Sooting
6.17.1 Requirements
6.17.2 Tests
6.18 Cyclic operation
6.18.1 Requirements
6.18.2 Tests
7 Marking
7.1 Marking of the appliance
7.1.1 Data plate
7.1.2 Warning notices
7.1.3 Other marking
7.2 Marking of the packaging
7.3 Utilization of symbols on the appliance and
packaging
7.3.1 Electrical supply
7.3.2 Type of gas
7.3.3 Gas supply pressure
7.3.4 Country of destination
7.3.5 Category
7.3.6 Other optional information
7.4 Instructions
7.4.1 General
7.4.2 Technical instructions for installation
and adjustment
7.4.3 Instructions for use and maintenance
7.5 Presentation
TABLES
1 Classification of gases
2 Characteristics of the test gases
3 Calorific values of the test gases of the third family
4 Test gases corresponding to appliance categories
5 Test pressures where no pressure couple exists
6 Test pressures where a pressure couple exists
7 Torque values for screws
8 Maximum temperature raise in parts of the appliance
that are likely to be touched accidentally
9 Vco2.N values
10 Symbols of the reference gases
11 Means of identification of types of gas in use in the
various countries
FIGURES
1 Standard test finger
2a Test corner for measuring floor and wall temperatures
2b Apparatus for measuring floor and wall temperatures
2c Test board for measuring worktop temperatures
3 Probe for measuring surface temperature
4 Pressure differentials for lint resistance test
5 Position of baffle with respect to lint generator
outlet duct
6 Lint generator
7 Lint filter
ANNEXES
A (normative) National situations
A.1 Categories listed in the body of the standard
marketed in the different countries
A.2 Appliance supply pressures corresponding to
the categories given in A.1
A.3 Special categories marketed nationally or
locally and corresponding test gases
A.4 Test gases corresponding to the special categories
given in A.3
A.5 Gas connections in the various countries
A.6 Equivalence rules
B (normative) Special national conditions
ZA (informative) Clauses of this European Standard addressing
essential requirements or other provisions of EU
Directives
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