NEN EN 1458-1 : 2011

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

Defines requirements and test procedures for construction, safety and marking of domestic direct gas-fired tumble dryers, types B22D and B23D having nominal heat input up to and including 6 kW. Not applicable to catalytical combustion appliances, those intended for industrial use, those for use where special conditions exist, eg. corrosive or explosive atmosphere, condensing types where heated air and combustion products used in the drying method are dehumidified by air or water cooling or appliances for use in vehicles or on aircraft or ships.