EN 12669:2000

FOREWORD
1 SCOPE
2 NORMATIVE REFERENCES
3 DEFINITIONS
   3.1 APPLIANCE AND ITS CONSTITUENT PARTS
   3.2 ADJUSTING, CONTROL AND SAFETY DEVICES
   3.3 OPERATION OF THE APPLIANCE
   3.4 GASES
   3.5 CONDITIONS OF OPERATION AND MEASUREMENT
   3.6 COUNTRY OF DESTINATION
   3.7 CLASSIFICATION
         3.7.1 Classification of gases
         3.7.2 Classification of appliances
4 CONSTRUCTION AND DESIGN REQUIREMENTS
   4.1 GENERAL
         4.1.1 Conversion to different gases
         4.1.2 Materials and methods of construction
         4.1.3 Accessibility for maintenance and use
         4.1.4 Thermal insulation
         4.1.5 Gas connection
         4.1.6 Soundness of the gas circuit
         4.1.7 Supply and distribution of air
         4.1.8 Checking the state of operation
         4.1.9 Electrical equipment
         4.1.10 Operational safety in the event of
                  fluctuation, interruption, and
                  restoration of the auxiliary energy
         4.1.11 Motors and fans
   4.2 ADJUSTING, CONTROL AND SAFETY DEVICES
         4.2.1 General
         4.2.2 Gas rate adjusters and range-rating
                  devices
         4.2.3 Aeration adjusters
         4.2.4 Manual controls
         4.2.5 Governors
         4.2.6 Multifunctional controls
         4.2.7 Flame supervision devices
         4.2.8 Automatic shut-off valves
         4.2.9 Automatic burner control systems
         4.2.10 Gas strainers
         4.2.11 Air strainers and filters
   4.3 IGNITION DEVICES
         4.3.1 General
         4.3.2 Ignition device for the main burner
         4.3.3 Ignition burners
   4.4 COMBUSTION AND DILUTION AIR, PRE-PURGE AND
         POST-PURGE
   4.5 FLAME SUPERVISION SYSTEM
         4.5.1 Appliances with non-automatic burner
                  systems
         4.5.2 Appliances with automatic burner systems
   4.6 START-GAS FLAME ESTABLISHMENT
         4.6.1 Appliances with non-automatic burner
                  systems
         4.6.2 Appliances with automatic burner systems
   4.7 MAIN FLAME ESTABLISHMENT
         4.7.1 Establishment by means of a start gas
                  flame
         4.7.2 Direct establishment of the main flame
   4.8 MAIN BURNER
   4.9 FACILITY FOR REMOTE CONTROL
   4.10 THERMOSTATS AND CONTROL OF AIR TEMPERATURE
         4.10.1 General
         4.10.2 Control of delivered air temperature
         4.10.3 Overheat cut-off device
         4.10.4 Sensors
   4.11 GAS PRESSURE TEST POINTS
   4.12 FACILITIES FOR COMMISSIONING AND TESTING
         4.12.1 General
         4.12.2 Appliances having reduced start gas rates
   4.13 ADDITIONAL REQUIREMENTS FOR APPLIANCES DESIGNED
         FOR PERMANENT OUTDOOR INSTALLATION OR WHERE
         AUTOMATIC IRRIGATION SYSTEMS ARE USED
         4.13.1 General
         4.13.2 Air inlets (outdoor appliances)
         4.13.3 Access panels and doors
         4.13.4 Dimensions of openings
         4.13.5 Fixing screws
5 OPERATIONAL REQUIREMENTS
   5.1 SOUNDNESS OF THE GAS CIRCUIT
   5.2 HEAT INPUTS
         5.2.1 Nominal heat input
         5.2.2 Start gas heat input
         5.2.3 Effectiveness of gas rate adjusters
         5.2.4 Effectiveness of the gas governor
         5.2.5 Effectiveness of the range-rating device
   5.3 LIMITING TEMPERATURES
         5.3.1 Temperatures of parts that have to be
                  touched during normal use
         5.3.2 Temperatures of the appliance casing
         5.3.3 Component temperatures
         5.3.4 Fan motor winding temperatures
         5.3.5 Maximum temperature of the delivered air
   5.4 IGNITION, CROSS-LIGHTING, FLAME STABILITY
         5.4.1 Ignition and cross-lighting
         5.4.2 Flame stability
   5.5 COMBUSTION
         5.5.1 Appliances designed to be used in
                  greenhouses
         5.5.2 Other appliances
         5.5.3 Combustion air proving device(s)
         5.5.4 CO2 safety device
         5.5.5 Auxiliary energy variations
   5.6 OVERHEAT CUT-OFF DEVICE
   5.7 WATER RESISTANCE
6 TEST METHODS
   6.1 GENERAL
         6.1.1 Characteristics of test gases;
                  reference and limit gases
         6.1.2 Conditions for preparation of the test
                  gases
         6.1.3 Practical application of test gases
         6.1.4 Test pressures
         6.1.5 Test procedures
         6.1.6 General test conditions
   6.2 CONSTRUCTION AND DESIGN
         6.2.1 Automatic burner control systems
                  (manually operated devices)
         6.2.2 Ignition opening time
         6.2.3 Ignition of the ignition burner with
                  the downstream main gas automatic
                  shut-off valve open
         6.2.4 Combustion air proving device(s)
   6.3 SAFETY OF OPERATION
         6.3.1 Soundness of the gas circuit
         6.3.2 Heat inputs
         6.3.3 Limiting temperatures
         6.3.4 Ignition, cross-lighting and flame
                  stability
         6.3.5 Combustion
         6.3.6 Overhead cut-off device
         6.3.7 Water resistance
7 MARKING AND INSTRUCTIONS
   7.1 GENERAL
   7.2 DESCRIPTION
   7.3 DATA PLATE AND LABELLING
   7.4 OTHER MARKING
   7.5 MARKING OF THE PACKAGING
   7.6 UTILIZATION OF SYMBOLS ON THE APPLIANCE AND
         PACKAGING
         7.6.1 Electrical supply
         7.6.2 Type of gas
         7.6.3 Gas supply pressure
         7.6.4 Country of destination
         7.6.5 Category
         7.6.6 Other information
   7.7 INSTRUCTIONS
         7.7.1 General
         7.7.2 Technical instructions for installation
                  and adjustment
         7.7.3 Instructions for conversion
         7.7.4 Instructions for servicing
         7.7.5 Instructions for use and maintenance
         7.7.5 Instructions for use and maintenance
         7.7.6 Presentation
ANNEX A (INFORMATIVE) NATIONAL SITUATIONS
      A.1 - CATEGORIES LISTED IN THE BODY OF THE STANDARD AND
            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
      A.4 - TEST GASES AND TEST PRESSURES CORRESPONDING TO THE
            SPECIAL GASES GIVEN IN A.3
      A.5 - GAS CONNECTIONS IN THE VARIOUS COUNTRIES
ANNEX B (INFORMATIVE) GUIDANCE FOR LIMITATIONS OF APPLICATION
                      OF DIRECT-FIRED AIR HEATERS IN BUILDINGS
      B.1 - GENERAL PRINCIPLES
      B.2 - SAFE OPERATING EMISSION LEVELS
      B.3 - ASSESSMENT OF CONCENTRATIONS
      B.4 - CASE STUDIES
ANNEX C (INFORMATIVE) A-DEVIATIONS
ANNEX D (NORMATIVE) SPECIAL NATIONAL CONDITIONS
ANNEX ZA (INFORMATIVE) CLAUSES OF THIS EUROPEAN STANDARD
         ADDRESSING REQUIREMENTS OR PROVISIONS

This European Standard specifies the requirements and tests methods for the safety of direct gas-fired hot air blowers for greenhouses, agriculturalized or supplementary space heating, hereinafter called "appliances". "Supplementary" in this standard means to make up a deficiency, i.e. for the temporary heating of spaces intended for agricultural or commercial use:- workshops, sheds, stables, poultry houses, barns, cattle pens, etc. - factories, workshops, warehouses, storage sheds, mills, hangers, drying of buildings, temporary site accomodation, etc.d