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BS EN 26:2023 – TC 2024

BS EN 26:2023 – TC 2024

$280.87

Tracked Changes. Gas-fired instantaneous water heaters for the production of domestic hot water

Published By Publication Date Number of Pages
BSI 2024 410
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This European Standard defines the specifications and test methods concerning the construction, safety, rational use of energy and fitness for purpose, and also the classification and marking of gas-fired instantaneous water heaters for sanitary uses, hereafter called ā€œwater heatersā€. This European Standard applies to water heaters: – of types AAS, B11, B11BS, B12, B12BS, B13, B13BS, B14, B22, B23, B32, B33, B44, B52, B53, C11, C12, C13, C21, C22, C23, C32, C33, C42, C43, C52, C53, C62, C63, C72, C73, C82and C83 according to CEN/TR 1749; – fitted with atmospheric burners; – equipped with atmospheric burners assisted by a fan for the supply of combustion air or evacuation of combustion products or fully premix burners; – using one or more combustible gases corresponding to the three gas families and at the pressures stated in accordance to EN 437; – of nominal heat input not exceeding 70 kW; – with an ignition burner or with direct ignition of the main burner. In this European Standard, the heat inputs are expressed in relation to the net calorific value (Hi). This European Standard does not contain all the requirements necessary for: – boiling water appliances; – appliances intended to be connected to a mechanical means of evacuating the combustion products; – appliances which fulfil a dual role of space heating and heating water for sanitary use; – appliances making use of the heat of condensation of the water contained in the combustion products; – water heaters of types B21, B31, B41, B42, B43 and B51. This European Standard only covers water heaters where the fan, if any, is an integral part of the appliance. This European Standard: – does not apply to appliances not intended to be connected to a flue when they are not fitted with an atmosphere sensing device; – takes account of the information given in Technical Report CEN/CR 1472:1994 with respect to marking. Type B appliances should be with a combustion products discharge safety device to comply with essential requirement 3.4.3 of the Gas Appliances Directive 2009/142/EC. In this European Standard, the appliance is identified as type B11BS. Appliances intended to be installed outdoors or in a room separate from inhabited rooms and provided with appropriate ventilation are not required to have this combustion products discharge safety device but, in this case, appropriate warnings on the packaging, and in the instructions should clearly define the limited authorized use for this type of appliance. In this European Standard, the appliance is identified as type B11. The main symbols used in this European Standard are summarized in Annex F.

PDF Catalog

PDF Pages PDF Title
1 30485200
239 A-30404047
240 undefined
249 1 Scope
2 Normative references
252 3 Terms and definitions
268 4 Classification
5 Constructional requirements
269 5.2.1.1 General
270 5.2.1.2 Use of Zinc alloy
5.2.2.1 Metallic materials
273 5.2.7.1 Gas connections
5.2.7.2 Connection to the water circuit
274 5.2.8.1 Soundness of the gas circuit
5.2.8.2 Soundness of the combustion circuit
275 5.2.9.1 All appliances
5.2.9.2 Type AAS appliances
5.2.9.3 Type B appliances
276 5.2.9.4 Separate combustion products evacuation duct
5.2.9.5 Type C appliances
277 5.2.9.6 Special requirements for certain components of water heaters with a fan
279 5.2.12.1 General
5.2.12.2 Controls
283 5.3.7.1 Ignition burner
284 5.3.7.2 Manual ignition of the ignition burner
5.3.7.3 Automatic ignition device
5.3.8.1 General
285 5.3.8.2 Thermoelectric device of a permanent ignition burner
5.3.8.3 Flame supervision device of an appliance with an intermittent safety ignition burner
5.3.8.4 Flame supervision devices for automatic burner control systems
287 5.3.13.1 Protection against frost
5.3.13.2 Protection against the ingress of rain
288 5.5.2.1 Requirements
5.5.2.2 Test conditions
289 6 Operational requirements
6.1.6.1 General
6.1.6.2 Test room
6.1.6.3 Conditions of installation
291 6.1.6.4 Water supply
6.1.6.5 Measurement uncertainties
293 6.1.6.6 Adjustment of the appliance
294 6.1.6.7 Testing conditions
6.1.6.8 Electrical supply
6.2.1.1 Requirement
6.2.1.2 Test
295 6.2.2.1 General
296 6.2.2.2 Soundness after reassembly
6.2.2.3 General requirements
6.2.2.4 Soundness of the air supply and combustion product circuit type C appliances
298 6.2.2.5 Soundness of the combustion product circuit of Type B appliances
301 6.2.3.1 Requirements
6.2.3.2 Tests
6.3.1.1 Heat input obtained
302 6.3.1.2 Corrected heat input
303 6.3.2.1 Appliances without a preset adjuster
6.3.2.2 Appliances with preset adjusters
304 6.3.3.1 Requirement
6.3.3.2 Test
306 6.7.1.1 Requirements
6.7.1.2 Test
307 6.7.2.1 Requirements
308 6.7.2.2 Tests
6.7.3.1 Requirements
6.7.3.2 Tests
309 6.7.3.3 Resistance to draught for water heaters intended to be installed outside and/or in a partially protected place
310 6.7.4.1 Requirements
6.7.4.2 Tests
6.7.5.1 Requirements
6.7.5.2 Tests
311 6.7.6.1 Requirements
6.7.6.2 Tests
6.7.7.1 Requirements
6.7.7.2 Tests
6.7.8.1 Requirements
6.7.8.2 Tests
6.7.9.1 Requirements
6.7.9.2 Tests
6.7.10.1 Requirements
312 6.7.10.2 Tests
6.7.11.1 Requirements
6.7.11.2 Tests
6.7.12.1 General
6.7.12.2 Supervision of the combustion air rate and the combustion products rate
313 6.7.12.3 Gas/air ratio controls
314 6.7.12.4 Endurance of the gas/air ration control
6.7.12.5 Adjustment of the gas/air ratio
6.7.12.6 Supplementary test for type B water heaters with draught diverter
315 6.7.13.1 Requirements
6.7.13.2 Test
6.7.14.1 General
6.7.14.2 Verification of the protected nature of a combustion chamber
316 6.7.14.3 Verification of normal ignition in a combustible air/gas mixture for types C12 and C13 water heaters
6.7.15.1 Requirements
6.7.15.2 Test
6.7.16.1 Requirement
317 6.7.16.2 Test
6.8.2.1 Rotary knob
6.8.2.2 Push-button
6.8.3.1 Sealing force
318 6.8.3.2 Opening and closing function
6.8.3.3 Closing time
6.8.3.4 Endurance
319 6.8.4.1 Automatic ignition devices
6.8.4.2 Heat input of ignition burners
320 6.8.5.1 Appliances with a thermoelectric device
6.8.5.2 Appliances with an intermittent safety ignition burner
6.8.5.3 Appliances with automatic burner control systems
322 6.8.6.1 Requirement
323 6.8.6.2 Test
6.8.7.1 Requirement
6.8.7.2 Test
6.8.8.1 Requirement
324 6.8.8.2 Test
6.8.9.1 Requirements
6.8.9.2 Tests
6.8.10.1 Sensitivity of the device to lack of ventilation in the room
325 6.8.10.2 Sensitivity of the device to fouling of the heating body
326 6.8.10.3 Operating defect of the device
6.8.11.1 General
6.8.11.2 Test conditions
327 6.8.11.3 Nuisance shutdown
6.8.11.4 Shutdown times
329 6.9.2.1 General
330 6.9.2.2 Test in still air
331 6.9.2.3 Water heaters using gas/air ratio controls
6.9.2.4 Supplementary tests
333 6.9.3.1 General
334 6.9.3.2 Weighting
335 6.9.3.3 Calculation of emissions of NOX in mg/kWh based on GCV
336 6.13.1.1 Requirements
337 6.13.1.2 Test conditions
6.13.2.1 Requirement
6.13.2.2 Test conditions
338 7 Rational use of energy
340 8 Fitness for purpose
8.2.1.1 Requirements
8.2.1.2 Tests
8.2.2.1 Requirements
8.2.2.2 Tests
8.2.3.1 Nominal working combustion products temperature
8.2.3.2 Overheat combustion products temperature
341 8.2.4.1 General
8.2.4.2 Compressive strength
342 8.2.4.3 Lateral strength
343 8.3.2.1 Characterization
8.3.2.2 Long-term resistance to thermal load
345 8.3.2.3 Long-term resistance to condensate exposure
346 8.3.2.4 Resistance to condensing/non-condensing cycling
347 8.3.2.5 Resistance to ultraviolet radiation (UV)
348 8.3.2.6 Geometrical stability
8.3.2.7 Reaction to fire
8.4.1.1 Requirements
8.4.1.2 Test conditions
349 8.4.2.1 Requirements
8.4.2.2 Test conditions
8.4.3.1 Requirements
350 8.4.3.2 Test conditions
8.4.4.1 Requirements
8.4.4.2 Test conditions
351 8.4.5.1 Requirements
8.4.5.2 Test conditions
8.4.6.1 Requirements
8.4.6.2 Test conditions
8.4.7.1 Requirements
8.4.7.2 Test conditions
352 8.4.8.1 Durability – Requirements
8.4.8.2 Strength
8.5.1.1 Requirement
8.5.1.2 Test
8.5.2.1 Requirements
8.5.2.2 Tests
8.5.3.1 Requirement
8.5.3.2 Test
353 8.5.4.1 Requirement
8.5.4.2 Test
8.5.5.1 Normal and high water pressure appliances
8.5.5.2 Low water pressure appliances
354 8.5.6.1 Fixed output or adjustable output appliances
355 8.5.6.2 Appliances with automatic output variation
358 8.5.7.1 Requirement
8.5.7.2 Test
360 9 Marking and instructions
361 9.1.3.1 General
9.1.3.2 Composition of packaging
362 9.1.4.1 Presence of warning notices on water heater and packaging
9.1.4.2 Content of warning notices on water heater and packaging
363 9.2.1.1 General
365 9.2.1.2 For installation and adjustment of the gas circuit
9.2.1.3 For installation of the domestic hot water
9.2.1.4 For installation of the combustion circuit
369 9.2.2.1 Presence of instructions for use and servicing
9.2.2.2 Content of instructions for use and servicing
370 9.2.2.3 For type AAS appliances
9.2.2.4 For type B11BS, B12BS, B13BS appliances
9.2.2.5 For type C appliances
371 9.2.3.1 Conversion instructions for the installer
9.2.3.2 Modification of warnings after conversion
372 10 Nitrogen oxides emissions
11 Sound power level (LWA)
373 12 Figures referenced in this standard
385 Annex A (informative)National situations
A.1 General
A.2 Gas connections in common use in the various countries
388 A.3 Flue pipe diameters in force in the various countries
389 Annex B (normative)Test apparatus for type C1, C3, B4 and B5 water heaters (see 6.7.3.2)
393 Annex C (normative)Test apparatus for type C21 appliances (see 6.7.4.2)
394 Annex D (normative)Description of the sealed room for the tests of type AAS appliances (see 6.8.10.1.2.1)
D.1 Configuration of the sealed room
D.2 Soundness of the room
D.3 Effectiveness of mixing
D.4 Equipment of the room
395 Annex E (informative)Soundness of the gas circuit test – Volumetric method(6.2.1)
E.1 Equipment
E.2 Test method
396 Annex F (informative)Principal symbols and abbreviations used
398 Annex G (informative)Guidelines for extension to other appliances categories
399 Annex H (normative)Lists of materials currently used for the construction of the gas water heaters
H.1 General
H.2 Special types of steel
H.3 Copper and copper alloys
400 H.4 Plastic materials
401 Annex I (normative)Test methods to determine the effects of to long-term thermal load, long-term condensate exposure, condensing/ non-condensing cycling and resistance to UV radiation
402 Annex J (informative)NOx conversion calculation
404 Annex K (normative)Parts in copper or copper alloys
405 Annex L (informative)Compilation of the test conditions for the various gas families
407 Annex M (informative)Alternative Method for the determination of the nominal heat input or the maximum and minimum heat input (according to 6.3.1) for appliances using a pneumatic gas/air ratio control system

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BS EN 26:2023 - TC 2024
$280.87