BS EN 1264‑2:2021 pdf download.Water based surface embedded heating and cooling systems Part 2: Floor heating: Methods for the determination of the thermal output using calculations and experimental tests.
9 Test procedure for the determination of the thermal output of systems that cannot be calculated in accordance with Clause 6 For constructions which do not correspond to the basic construction of the types A, B, C or D, or in case of dimensions or material data outside the scope of the calculation method, the specific thermal output shall be determined by testing (experimentally) as follows.
A test sample consisting of at least three heating pipes, with the pipe spacing to be tested, in accordance with the system design of the floor heating to be investigated is positioned in the testing equipment according to Figure A.6. The size of the test sample shall be approximate 1 m × 1 m in agreement with the test laboratory. It shall cover preferably three-pipe spacing. In Figure A.6 the cooling plates simulate the room above the floor heating system (see Figure A.6, key 1), i.e. the temperature of the heated room ϑ i , and the room below (see Figure A.6, key 4). For the cooling plates the construction according to Figure A.7 is recommended consisting of panel radiators with flat tubes in which disconnecting points realize the appropriate cooling water flow. The cooling plate shall be at least of size 1 m x 1 m. The upper plate shall exert a weight force of (450 ± 50) N during measurements. The thermal transfer resistance 1/α at the floor surface is simulated by the heat transfer layer (see Figure A.6, key 2).The two lateral heating pipes serve as a protection field to enable the optimum undisturbed temperature field around the central pipe.
11 Test system
11.1 General The test should be conducted by a test laboratory which is accredited according to EN ISO/IEC 17025. The laboratory takes part at all inter-comparison tests. The test system consists of the following components:
— Computer system including the software to calculate the specific thermal output (field of characteristic curves and limit curves) according to Clause 6 of this document;
— Test equipment for the test procedure according to Clause 9 of this document;
— primary and secondary master sample;
— Constructional conformity: The participating laboratory shall state the conformity of its test equipment to this document;
— Software conformity: The participating laboratory shall state the conformity of its software to this document.
11.2 Master samples The construction and the materials of the master samples used for the test equipment of Clause 9 are shown in Figure A.9. The primary and the secondary master sample are of the same construction and materials. The laboratory shall equip itself with the master sample 2. Master sample 1 will be circulated among the laboratories participating at the test system. The manufacturing process has to ensure that for all samples the materials and the dimensions correspond correctly. This shall be verified and documented in a complete report. It shall be kept available for any further check.BS EN 1264‑2 pdf download.