BS EN 50465:2015
$247.30
European product standard for combined heating power systems using gas fuel
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 174 |
This European Standard specifies the requirements and test methods for the construction, safety, fitness for purpose, rational use of energy and the marking of a micro combined heat and power appliance; (hereafter referred to as “mCHP appliance”). This European Standard applies to mCHP appliances of types B22, B23, B32, B33, B52, B53, C1, C3, C42, C43 C52, C53, C62, C63, C82, C83 and C9 based on the classifications of CEN/TR 1749: – that use one or more supplied gases of the three gas families at the pressures stated in EN 437, – where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 ºC during normal operation, – where the maximum operating pressure in the – heating water circuit does not exceed 6 bar, – domestic hot water circuit (if installed) does not exceed 10 bar, – which are either intended to be installed indoors or outdoors in a partially protected place, – which are intended to produce hot water either by the instantaneous or storage principle, – which have a maximum heat input (based on net calorific value) not exceeding 70 kW, – which are designed for sealed or open water systems. NOTE 1?For applications where the maximum allowable water temperature exceeds 110 ºC or where volume multiplied by maximum allowable pressure exceeds 50 bar litres, further requirements may be necessary to comply with the essential requirements of Directive 97/23/EC (Pressure Equipment Directive (PED)). NOTE 2?For mCHP appliances with constructions that might not be fully covered by this European Standard or by another specific standard, the risk associated with the alternative construction will be assessed. NOTE 3?This EN includes formulae and methods intended to produce values required by implementation measures of the ErP Directive 2009/125/EC and Labelling Directive 2010/30/EU. NOTE 4? EN 13203-4 will specify the assessment of energy consumption for domestic hot water production of gas combined heat and power appliances (mCHP). This European Standard does not contain the requirements necessary for appliance capable of producing electrical energy without using the thermal energy. This European Standard does not cover all the requirements for mCHP appliances that are intended to be connected to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance (see Annex DD).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 10 | 1 Scope 2 Normative references |
| 13 | 3 Terms and definitions |
| 28 | 4 Classification 4.1 Gases/Categories 4.2 Mode of air supply and evacuation of combustion products 4.2.1 General |
| 29 | 4.2.2 Type of installation of a mCHP appliance (See informative Annex B) 4.2.2.1 Type B2 4.2.2.2 Type B3 4.2.2.3 Type B5 4.2.2.4 Type C1 4.2.2.5 Type C3 4.2.2.6 Type C4 |
| 30 | 4.2.2.7 Type C5 4.2.2.8 Type C6 4.2.2.9 Type C8 4.2.2.10 Type C9 4.2.3 Presence and position of a fan 4.3 Maximum water side operating pressure 4.4 Expansion system 5 Constructional requirements 5.1 General construction |
| 32 | 5.2 Use and servicing 5.3 Connections to the gas and water pipes 5.3.1 General 5.3.2 Connection to the gas pipe |
| 33 | 5.3.3 Connection to the central heating or domestic water pipes 5.4 Soundness 5.4.1 Soundness of the gas carrying circuit 5.4.2 Soundness of the combustion circuit |
| 34 | 5.4.3 Soundness of lubricating oil circuit 5.5 Supply of air and evacuation of combustion products 5.5.1 General 5.5.2 Air supply and combustion products evacuation ducts |
| 35 | 5.5.3 Terminal 5.5.4 Terminal guard 5.5.5 Fitting piece 5.6 Requirements for a fan incorporated in a mCHP appliance 5.7 Gas/air ratio controls |
| 36 | 5.8 Air proving |
| 37 | 5.9 Checking the state of operation 5.10 Operational safety in the event of failure of the energy supply for the control systems 5.11 Drainage 5.12 Conversion to different gases |
| 38 | 5.13 Materials and thickness 5.13.1 General 5.13.2 Materials and thicknesses of walls or tubes under water pressure of pressure class 3 5.13.2.1 General 5.13.2.2 Materials 5.13.2.3 Thickness |
| 39 | 5.13.2.4 Welded seams and welding fillers |
| 44 | 5.13.2.5 Materials and method of construction of components of the domestic water circuit for combination mCHP appliances 5.14 Thermal insulation 5.15 Durability against corrosion of metallic combustion product circuits |
| 45 | 5.16 Requirements for valves as parts of the gas circuit |
| 46 | 5.17 Combustion products evacuation duct 5.17.1 Stability under mechanical loading 5.17.2 Stability under exposure to heat 5.17.3 Corrosion resistance 5.17.4 Resistance to condensate and moisture under normal operating conditions 5.18 Design 5.18.1 General 5.18.2 Materials in contact with condensate 5.18.3 Discharge of condensate |
| 47 | 5.19 Gas carrying circuit 5.19.1 General |
| 48 | 5.19.2 Control devices 5.19.3 Composition of the gas circuit |
| 49 | 5.19.4 Fuel cell mCHP appliance – composition of the purge circuit (if any) 5.20 Electrical equipment |
| 50 | 5.21 Requirements for adjusting, control and safety devices 5.21.1 General |
| 51 | 5.21.2 Adjusters and range-rating devices 5.21.2.1 General 5.21.2.2 Adjusters 5.21.2.3 Range-rating devices 5.21.2.4 Gas pressure regulator 5.21.3 Ignition devices (if applicable) 5.21.3.1 Ignition of the ignition burner 5.21.3.2 Ignition device for the main burner |
| 52 | 5.21.3.3 Ignition burners 5.21.3.4 Direct ignition 5.21.4 Flame supervision or reaction monitoring 5.21.4.1 General |
| 53 | 5.21.4.2 Automatic burner / engine control system 5.21.5 Thermostats and water temperature limiting devices for the heating water circuit 5.21.5.1 General 5.21.5.2 mCHP appliances intended exclusively for heating systems with an open expansion vessel 5.21.5.3 mCHP appliances intended for heating systems with an open or sealed expansion vessel |
| 54 | 5.21.5.4 Control thermostat 5.21.5.5 Limit thermostat 5.21.5.6 Over-heat cut-off device 5.21.5.7 Safety temperature limiter 5.21.5.8 Sensors |
| 55 | 5.21.6 Remote control 5.21.6.1 General 5.21.6.2 Remote control reset functions |
| 56 | 5.21.7 Expansion vessel and pressure gauge 5.21.8 Pressure test points 5.21.9 mCHP appliances intended to be installed in a partially protected place. 5.22 Burners 6 Operational requirements 6.1 General requirements |
| 57 | 6.2 Soundness 6.2.1 Soundness of the gas carrying circuit 6.2.2 Soundness of the combustion circuit 6.2.2.1 General 6.2.2.2 Air supply and combustion product circuit type C mCHP appliance |
| 58 | 6.2.2.3 Soundness of the combustion product circuit of type B mCHP appliance |
| 59 | 6.2.3 Soundness of the heating water circuit 6.2.3.1 General 6.2.3.2 mCHP appliance for class 1 and 2 6.2.3.3 mCHP appliance of pressure class 3 6.2.4 Soundness of the internal cooling circuit (if applicable) |
| 60 | 6.3 Heat input and heat and electrical output 6.3.1 Heat input for nominal appliance outputs (100 % CHP + 100 % Sup) and for 100 % CHP + 0 % Sup 6.3.2 Adjustment of the heat input by the downstream gas pressure (if applicable) 6.3.3 Ignition rate (if applicable) 6.3.4 Nominal output (thermal and electrical output) 6.3.5 Nominal domestic hot water heat input 6.3.6 Water pressure to obtain the nominal heat input for instantaneous combination mCHP appliances 6.3.7 Obtaining the domestic hot water temperature for instantaneous combination mCHP appliances 6.4 Safety of operation (temperature / limit gas) 6.4.1 Limiting temperatures 6.4.1.1 Limiting temperatures of the adjusting, control and safety devices |
| 61 | 6.4.1.2 Limiting temperatures of the side walls, the front and the top 6.4.1.3 Limiting temperature of the test panels and the floor 6.4.1.4 External temperature of the ducts 6.4.2 Thermostats and temperature limiting devices 6.4.2.1 General |
| 62 | 6.4.2.2 Water control thermostats 6.4.2.3 Water temperature limiting devices |
| 63 | 6.4.2.4 Temperature of combustion products 6.4.2.5 Temperature of internal cooling circuits (if applicable) 6.4.3 Ignition – Cross lighting – Flame stability 6.4.3.1 General 6.4.3.2 Limit conditions (if applicable) 6.4.3.3 Special conditions (if applicable) |
| 64 | 6.4.3.4 Reduction of the gas rate of the ignition burner (if applicable) 6.4.3.5 Reduction of the gas pressure 6.4.3.6 Defective closure of the gas valve immediately upstream of the main burner (if applicable) 6.4.3.7 Defective operation of the valve controlling the supply of ignitable mixture for ICE engine (if applicable) 6.4.3.8 Resistance to draught for type B mCHP appliance 6.4.4 Pre-purge 6.4.4.1 Pre-purge under normal conditions |
| 65 | 6.4.4.2 Pre-purge after safety shut-down or reset from lock-out 6.4.4.3 Verification of the protected nature of a combustion chamber 6.4.4.4 Functioning of a permanent ignition burner when the fan stops during the standby time (if applicable) 6.4.4.5 Verification of normal ignition in a combustible air/gas mixture for type C mCHP appliance incorporating a fan 6.4.5 Process gas purge (if applicable) 6.5 Start / Release and adjusting, control and safety devices (if applicable) 6.5.1 General 6.5.2 Combination mCHP appliances |
| 66 | 6.5.2.1 Safety of the domestic hot water circuit |
| 67 | 6.5.3 Control devices 6.5.3.1 Ignition burner 6.5.3.2 Automatic burner / engine control system |
| 68 | 6.5.4 Gas pressure regulator 6.5.5 Air proving device 6.5.5.1 General 6.5.5.2 Supervision of the combustion air or combustion products rate 6.5.5.3 Gas/air ratio controls |
| 69 | 6.5.6 Functioning of the fan of a type C4 mCHP appliance 6.5.7 Delayed ignition 6.5.8 Common flue evacuation duct |
| 70 | 6.5.9 Leak tightness of the back-flow valve 6.5.10 Functional durability of the back-flow valve 6.6 Efficiency 6.6.1 Efficiency (Hi) 6.6.2 Seasonal space heating energy efficiency (ErP) 6.6.3 Electric auxiliary energy consumption for ErP 6.6.4 Stand-by heat loss Pstby 6.6.5 Permanent ignition burner heat input pilot 6.6.6 Minimum sustained controlled heat output 6.7 Operation 6.8 Combustion 6.8.1 Carbon monoxide 6.8.1.1 General |
| 71 | 6.8.1.2 Limit conditions 6.8.1.3 Special conditions 6.8.1.4 Sooting 6.8.2 NOX (Other pollutants) 6.8.3 Supplementary test for condensing mCHP appliance 6.9 Resistance of materials to pressure 6.9.1 General |
| 72 | 6.9.2 mCHP appliances of pressure class 1 6.9.3 mCHP appliances of pressure class 2 6.9.4 mCHP appliances of pressure class 3 6.9.4.1 mCHP appliances of sheet steel or non-ferrous metals 6.9.4.2 mCHP appliances of cast iron and cast materials 6.10 Hydraulic resistance 6.11 Formation of condensate 6.12 Designation and measurement of reference temperatures of flue systems 6.12.1 Nominal working combustion products temperature 6.12.2 Overheat combustion products temperature |
| 73 | 6.13 Mechanical resistance and stability of ducts, terminal and fitting pieces 6.13.1 General 6.13.2 Compressive strength 6.13.2.1 Duct sections and fittings 6.13.2.2 Ducts support 6.13.2.3 Vertical terminals 6.13.3 Lateral strength 6.13.3.1 Flexural tensile strength 6.13.3.2 Components subject to wind load 6.13.4 Flexible metallic liners 6.14 Requirements for plastic in the combustion product evacuation ducts, terminals and fitting pieces for mCHP appliances 6.14.1 Thermal resistance 6.14.2 Materials 6.14.2.1 Characterization |
| 74 | 6.14.2.2 Long-term resistance to thermal load 6.14.2.3 Long-term resistance to condensate exposure |
| 75 | 6.14.2.4 Resistance to condensing/non-condensing cycling |
| 76 | 6.14.2.5 Resistance to ultraviolet radiation (UV) 6.14.2.6 Geometrical stability |
| 77 | 6.14.2.7 Reaction to fire 6.15 Requirements for elastomeric seals and elastomeric sealants in the combustion product evacuation ducts, terminals and fitting pieces 6.15.1 Characterization 6.15.2 Long-term resistance to thermal load 6.15.3 Long-term resistance to condensate exposure |
| 78 | 6.15.4 Cyclic condensate resistance test 6.15.5 Relaxation behaviour 6.15.6 Compression set 6.15.7 Low temperature resistance 6.15.8 Joints in elastomeric seals 6.15.8.1 Durability 6.15.8.2 Strength |
| 79 | 6.16 Special provisions for mCHP appliances intended to be installed in a partially protected place 6.16.1 Frost protection system for mCHP appliances intended to be installed in a partially protected place 6.16.2 Protection against the ingress of rain 7 Test methods 7.1 General test conditions 7.1.1 General 7.1.2 Characteristics of the reference and limit gases 7.1.2.1 General 7.1.2.2 Requirements of the preparation of test gases 7.1.2.3 Characteristics and choice of test gases 7.1.2.4 Test pressures |
| 80 | 7.1.3 Installation of the mCHP appliance |
| 82 | 7.1.4 Gas carrying circuit 7.1.5 Conduct of the test to obtain a heat input |
| 83 | 7.1.6 Water circuit |
| 84 | 7.1.7 Thermal equilibrium 7.1.8 General test conditions for combination mCHP appliances 7.1.9 Electrical supply 7.1.9.1 General 7.1.9.2 Power consumption 7.1.9.3 Electrical output power 7.1.10 Adjustment of ICE mCHP appliance to convert the measured emissions into standard conditions |
| 85 | 7.1.11 Uncertainty of measurements |
| 88 | 7.2 Soundness 7.2.1 Soundness of the gas carrying circuit |
| 89 | 7.2.2 Soundness of the combustion circuit 7.2.2.1 General |
| 90 | 7.2.2.2 Air supply and combustion product circuit type C mCHP appliance 7.2.2.3 Soundness of the combustion product circuit of type B mCHP appliance |
| 91 | 7.2.3 Soundness of the heating water circuit 7.2.3.1 General 7.2.3.2 mCHP appliance for class 1 and 2 7.2.3.3 mCHP appliance of pressure class 3 |
| 92 | 7.2.4 Soundness of the internal cooling circuits 7.3 Heat input and heat and electrical output 7.3.1 Heat input for nominal appliance outputs (100 % CHP + 100 % Suppl.) and 100 % CHP +0 % Sup |
| 93 | 7.3.2 Adjustment of the heat input by the downstream pressure 7.3.3 Ignition rate(s) (if applicable) 7.3.4 Nominal output (thermal and electrical output) 7.3.5 Nominal domestic hot water heat input 7.3.6 Water pressure to obtain the nominal heat input for instantaneous combination mCHP appliances 7.3.7 Obtaining the domestic hot water temperature for instantaneous combination mCHP appliances |
| 94 | 7.4 Safety of operation 7.4.1 Limiting temperatures 7.4.1.1 General 7.4.1.2 Limiting temperatures of the adjusting, control and safety devices 7.4.1.3 Limiting temperature of the side walls, the front and the top 7.4.1.4 Limiting temperature of the test panels and floor |
| 95 | 7.4.1.5 External temperature of the ducts 7.4.2 Thermostats and temperature limiting devices 7.4.2.1 General 7.4.2.2 Water control thermostat |
| 98 | 7.4.2.3 Water temperature limiting device |
| 99 | 7.4.2.4 Temperature of combustion products 7.4.3 Ignition – Cross lighting – Flame stability 7.4.3.1 General 7.4.3.2 Limit conditions |
| 100 | 7.4.3.3 Special conditions |
| 106 | 7.4.3.4 Reduction of the gas rate of the ignition burner |
| 107 | 7.4.3.5 Reduction of the gas pressure 7.4.3.6 Defective closure of the gas valve immediately upstream of the main burner 7.4.3.7 Defective operation of the valve controlling the supply of ignitable mixture for ICE engine 7.4.3.8 Resistance to draught for type B mCHP appliance 7.4.4 Pre-purge 7.4.4.1 Pre-purge under normal conditions |
| 108 | 7.4.4.2 Pre-purge after safety shut-down or reset from lock-out 7.4.4.3 Verification of the protected nature of a combustion chamber 7.4.4.4 Functioning of a permanent ignition burner when the fan stops during the standby time 7.4.4.5 Verification of normal ignition in a combustible air/gas mixture for type C1 appliances incorporating a fan |
| 109 | 7.4.5 Process gas purge 7.5 Start / Release and adjusting, control and safety devices 7.5.1 General 7.5.2 Combination mCHP appliances 7.5.2.1 Safety of the domestic hot water circuit |
| 111 | 7.5.3 Control devices 7.5.3.1 Ignition burner 7.5.3.2 Automatic burner / engine control system |
| 112 | 7.5.4 Gas pressure regulator 7.5.5 Air proving device 7.5.5.1 General 7.5.5.2 Supervision of the combustion air or the combustion products rate 7.5.5.3 Gas/air ratio controls |
| 113 | 7.5.6 Functioning of the fan of a type C4 mCHP appliance 7.5.7 Delayed ignition 7.5.8 Common flue evacuation duct |
| 114 | 7.5.9 Leak tightness of the back-flow valve 7.5.10 Functional durability of the back-flow valve 7.6 Efficiency 7.6.1 Efficiency (Hi) |
| 116 | 7.6.2 Seasonal space heating energy efficiency (ErP) 7.6.2.1 Conversion to gross calorific efficiency |
| 117 | 7.6.2.2 Equivalent space heating efficiency 7.6.2.3 Seasonal space heating energy efficiency in active mode |
| 118 | 7.6.2.4 Seasonal space heating energy efficiency |
| 120 | 7.6.3 Electric auxiliary energy consumption for ErP 7.6.3.1 General 7.6.3.2 System boundaries 7.6.3.3 Auxiliary energy at nominal input Pauxmax 7.6.3.4 Auxiliary energy at part load Pauxmin 7.6.3.5 Auxiliary energy at stand-by PSB 7.6.4 Stand-by heat loss Pstby 7.6.4.1 General 7.6.4.2 Measurement of stand-by losses of the mCHP appliance |
| 121 | 7.6.4.3 Thermal losses of the mCHP appliance 7.6.5 Permanent ignition burner heat input Qpilot 7.6.6 Minimum sustained controlled heat output |
| 122 | 7.7 Operation 7.8 Combustion 7.8.1 Carbon monoxide 7.8.1.1 General |
| 123 | 7.8.1.2 Limit conditions 7.8.1.3 Special conditions |
| 124 | 7.8.1.4 Sooting |
| 125 | 7.8.2 NOX (Other pollutants) 7.8.2.1 General |
| 126 | 7.8.2.2 Weighting |
| 127 | 7.8.3 Supplementary test for condensing mCHP appliance |
| 128 | 7.9 Resistance of the materials to pressure 7.9.1 General 7.9.2 mCHP appliance of pressure class 1 7.9.3 mCHP appliance of pressure class 2 7.9.4 mCHP appliance of pressure class 3 7.9.4.1 mCHP appliance of sheet metal or non-ferrous metals 7.9.4.2 mCHP appliance of cast iron and cast materials 7.10 Hydraulic resistance |
| 129 | 7.11 Formation of condensate |
| 130 | 7.12 Designation and measurement of reference temperatures of flue systems 7.12.1 Nominal working combustion products temperature 7.12.2 Overheat combustion products temperature 7.13 Mechanical resistance and stability of ducts, terminal and fitting pieces 7.13.1 General 7.13.2 Compressive strength 7.13.2.1 Duct sections and fittings 7.13.2.2 Ducts support 7.13.2.3 Vertical terminals 7.13.3 Lateral strength 7.13.3.1 Flexural tensile strength 7.13.3.2 Components subject to wind load |
| 131 | 7.13.4 Flexible metallic liners 7.14 Requirements for plastic in the combustion product evacuation ducts, terminals and fitting pieces for mCHP appliances 7.14.1 Thermal resistance 7.14.2 Materials 7.14.2.1 Characterization 7.14.2.2 Long-term resistance to thermal load |
| 132 | 7.14.2.3 Long-term resistance to condensate exposure |
| 133 | 7.14.2.4 Resistance to condensing/non-condensing cycling 7.14.2.5 Resistance to ultraviolet radiation (UV) |
| 134 | 7.14.2.6 Geometrical stability 7.14.2.7 Reaction to fire 7.15 Tests for elastomeric seals and elastomeric sealants in the combustion product evacuation ducts, terminals and fitting pieces 7.15.1 Characterization 7.15.2 Long-term resistance to thermal load 7.15.3 Long-term resistance to condensate exposure |
| 135 | 7.15.4 Cyclic condensate resistance test 7.15.5 Relaxation behaviour 7.15.6 Compression set |
| 136 | 7.15.7 Low temperature resistance 7.15.8 Joints in elastomeric seals 7.15.8.1 Durability 7.15.8.2 Strength 7.16 Special provisions for mCHP appliances intended to be installed in a partially protected place 7.16.1 Frost protection system for mCHP appliances intended to be installed in a partially protected place 7.16.2 Protection against the ingress of rain 8 EMC / electrical requirements 8.1 Relevant for the Gas safety 8.2 Relevant for the Electrical safety related to the grid with indirect effect to gas safety 8.3 Relevant for the EMC |
| 137 | 9 Marking, installation and operating instructions 9.1 mCHP appliance marking 9.1.1 Data plate |
| 138 | 9.1.2 Supplementary markings |
| 139 | 9.1.3 Packaging 9.1.4 Warnings on the mCHP unit and the packaging 9.1.5 Other information |
| 140 | 9.2 Installation instructions 9.2.1 Technical instructions 9.2.1.1 Introduction 9.2.1.2 General 9.2.1.3 Installation and adjustment of the gas carrying circuit |
| 141 | 9.2.1.4 Installation of the central heating circuit 9.2.1.5 Installation of the combustion circuit |
| 142 | 9.2.1.6 Electrical installation |
| 143 | 9.2.2 Supplementary marking and instructions in the case of mCHP appliance to be installed in partially protected places 9.2.2.1 General information 9.2.2.2 Warning on the mCHP appliance and the packaging 9.2.2.3 Technical instructions 9.3 Operating instructions (i.e. users’ instructions) |
| 144 | 9.4 Conversion instructions 9.5 Presentation |
| 145 | Annex A (informative)Different gas connections in common use in the various countries |
| 146 | Annex B (informative)Classification of type B and type C mCHP appliances |
| 151 | Annex C (informative)Composition of the gas circuit C.1 Minimum requirements for mCHP unit with fan, with ignition burner or prepurge |
| 152 | C.2 Minimum requirements for mCHP units with fan, without permanent or alternating ignition burner and without pre-purge |
| 153 | Annex D (informative)Practical method of calibrating the test rigto enable the heat loss Dp to be determined |
| 154 | Annex E (informative)A-deviations |
| 155 | Annex F (informative)Main symbols and abbreviations used |
| 156 | Annex G (informative)Examples for marking G.1 Data-plate (see 9.1.1) G.2 Additional data-plate (see 9.1.2) |
| 157 | Annex H (informative)Calculation of conversions of NOx |
| 158 | Annex I (informative)Test rig for the measurement of the stand-by heat losses |
| 160 | Annex CC(normative)Test methods to determine the effects of long-term thermal load, long-term condensate exposure, condensing/ non- condensing cycling and resistance to UV radiation |
| 161 | Annex DD(informative)Variations in gas quality |
| 166 | Annex EE(informative)Calculation of the efficiency for ErP |
| 169 | Annex ZZ(informative)Coverage of Essential Requirements of EU Directives |
| 172 | Bibliography |
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