EN 12976-2:2006

SLOVENSKI STANDARD
01-maj-2006
1DGRPHãþD
SIST EN 12976-2:2002
7RSORWQLVRQþQLVLVWHPLLQVHVWDYQLGHOL,QGXVWULMVNRL]GHODQLVLVWHPLGHO
3UHVNXVQHPHWRGH
Thermal solar systems and components - Factory made systems - Part 2: Test methods
Thermische Solaranlagen und ihre Bauteile - Vorgefertigte Anlagen - Teil 2:
Prüfverfahren
Installations solaires thermiques et leurs composants - Installations préfabriquées en
usine - Partie 2: Méthodes d'essai
Ta slovenski standard je istoveten z: EN 12976-2:2006
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 12976-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2006
ICS 27.160 Supersedes EN 12976-2:2000
English Version
Thermal solar systems and components - Factory made
systems - Part 2: Test methods
Installations solaires thermiques et leurs composants - Thermische Solaranlagen und ihre Bauteile - Vorgefertigte
Installations préfabriquées en usine - Partie 2: Méthodes Anlagen - Teil 2: Prüfverfahren
d'essai
This European Standard was approved by CEN on 9 December 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12976-2:2006: E
worldwide for CEN national Members.

Contents Page
Foreword .4
Introduction.5
1 Scope .7
2 Normative references .7
3 Terms and definitions.7
4 Symbols and abbreviations.8
5 Testing .8
5.1 Freeze resistance.8
5.1.1 General .8
5.1.2 Systems using antifreeze fluid.8
5.1.3 Drain-back systems .9
5.1.4 Drain-down systems .9
5.1.5 Freeze protection and control functions combined .9
5.1.6 Other systems .9
5.2 Over temperature protection.10
5.2.1 Purpose .10
5.2.2 Apparatus .10
5.2.3 Procedure .10
5.2.4 Reporting requirements .11
5.3 Pressure resistance.11
5.3.1 Purpose .11
5.3.2 Apparatus .11
5.3.3 Safety precaution.11
5.3.4 Procedure .12
5.3.5 Reporting requirements .12
5.4 Water contamination.13
5.5 Lightning protection .13

5.6 Safety equipment .13
5.6.1 Safety valves .13
5.6.2 Safety lines and expansion lines .13
5.6.3 Blow-off lines .13
5.7 Labelling .13
5.8 Thermal performance characterisation .13
5.8.1 Introduction.13
5.8.2 Test procedure .14
5.8.3 Prediction of yearly performance indicators .14
5.9 Ability of solar-plus-supplementary systems to cover the load.19
5.9.1 General .19

5.9.2 Boundary conditions for auxiliary heating.19
5.9.3 Boundary conditions for daily load .19
5.9.4 Determination of the ability to cover the maximum daily load by means of testing the
system .20
5.9.5 Determination of the ability to cover the maximum daily load by means of numerical
simulations.20
5.10 Reverse flow protection .20
5.11 Electrical safety.21
Annex A (normative) Thermal performance presentation sheet.22
Annex B (normative) Reference conditions for performance prediction .25
B.1 General .25
B.2 Pipe diameter and insulation thickness .27
B.3 Calculation of cold water temperature at reference location .28
Annex C (informative) Extreme climate test procedure for the assessment of the frost resistance
of solar DHW systems with outdoor tank .30
C.1 Indoor test procedure for assessment of the frost resistance of solar DWH
systems with outdoor tank .30
C.1.1 Objective and applicability.30
C.1.2 Apparatus and mounting of the system.30
C.1.3 Test procedure.33
C.1.4 Test conditions .35
C.1.5 Results.39
C.2 Indoor test procedure for assessment of the reliability of solar DWH systems in
respect of overheating protection.39
C.2.1 Objective and applicability.39
C.2.2 Apparatus and mounting of the system.39
C.2.3 Test procedure.42
C.2.4 Test conditions .43
C.2.5 Results.44
Annex D (informative) Ageing test for thermostatic valves .46

D.1 General .46
D.2 Test arrangement.46
D.3 Test Procedure.47
D.4 Results.47

Annex E (informative) Lightning protection test for solar heating systems .48
E.1 Field of application .48
E.2 Purpose .48
E.3 Requirements.48
E.4 Apparatus .49
E.5 Test procedure.49
E.5.1 Test conditions .49
E.5.2 Solar heating system installation .49
E.5.3 Separation distance S .49
t
E.5.4 Size of the bonding cable or strip.49
E.5.5 Bridging between tank and supports .50
E.5.6 Bridging between collectors and supports.
...