PUBLIC REVIEW DRAFT, SEPTEMBER 2008KENYA STANDARD  KS 1852-1:2008  
ICS 27.160 
  
 
 
  
 
  
 
  
 
Thermal solar systems and components — 
Factory made systems — Part 1: General 
requirements 
 
  
 
 
 
 
  
 
  
 
 
Public Review Draft, September 2008  
 
 
 
 
  
 
  
 
 
© KEBS 2008 Edition 1.0 
 PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
ii © KEBS 2008 — All rights reserved  
TECHNICAL COMMITTEE REPRESENTATION 
 
The following organizations were represented on the Technical Committee 
 
Kenital Solar (K) Ltd  
ASP Solar (Kenya) Ltd  
Sollatek Ltd  
Department of Electrical & Electronic Engineering, JKUAT  
Renewable Energy Department, Ministry of Energy  
Chloride Exide Kenya Limited  
Energy Alternatives Africa Ltd  
Solarnet  
Automotive and Industrial Battery Manufacturers (AIBM) (K) Ltd 
RENCON Associates  
Telesales Solar Ltd 
Kenya Industrial Research and Development Institute, KIRDI 
Kenya Bureau of Standards — Secretariat 
 
 
 
 
  
 
 
 
 
  
REVISION OF KENYA STANDARDS 
 
In order to keep abreast of progress in industry, Kenya standards shall be regularly reviewed. Suggestions for 
improvement to published standards, addressed to the Managing Director, Kenya Bureau of Standards, are 
welcome. 
 
© Kenya Bureau of Standards, 2008 
 
Copyright. Users are reminded that by virtue of Section 25 of th e Copyright Act, Cap. 12 of 2001  of the Laws of Kenya, copyrig ht 
subsists in all Kenya Standards and except as provided under Section 26 of this Act, no Kenya Standard produced by Kenya Bureau  of 
Standards may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in w riting 
from the Managing Director. 
 
 
 
 
 
 
   
 
 
 
 
 
ISBN PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
ICS 27.160 
© KEBS 2008 — All rights reserved iii  
 
 
 
 
 
 
 
 
  
 
 
Thermal solar systems and components — 
Factory made systems — Part 1: General 
requirements 
 
 
 
  
 
  
 
 
  
 
KENYA BUREAU OF ST ANDARDS (KEBS) 
 
Head  Office:  P.O. Box 54974, Nairobi-00200, Tel.: (+254  020) 605490, 602350, Fax: (+254 020)  604031 
E-Mail: info@kebs.org,  Web:http://www.kebs.org   
 
KEBS Coast Region 
P.O. Box 99376, Mombasa 80100 
Tel: (+254 041) 229563, 230939/40 
Fax: (+254 041) 229448 
E-mail: kebs-msa@swiftmombasa.com  KEBS Lake Region
P.O. Box 2949, Kisumu 40100 
Tel: (+254 057) 23549,22396 
Fax: (+254 057) 21814 
E-mail: kebs-ksm@swiftkisumu.com  KEBS North Rift Region 
P.O. Box 2138, Nakuru 20100 
Tel: (+254 051) 210553, 210555
 PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
iv © KEBS 2008 — All rights reserved  
Foreword 
 
This Kenya standard was developed by the Renewable Energy Resources Technical Committee under the supervision of the Electrical Industry Standards Committee and is in accordance with the procedures of the 
Bureau. 
 
Drinking water quality 
 
In respect of potential adverse effects on the quality of water intended for human consumption, caused by the 
product covered by this standard: 
 
a) This standard provides no information as to whether the product may be used without restriction; 
 
b) It should be noted that, while awaiting the adoption of verifiable Kenya criteria, existing national 
regulations concerning the use and/or the characteristics of this product remain in force. 
 
Factory Made and Custom Built solar heating systems 
The standards KS 1852-1 as well as KS 1852-2 and KS 1855-1 to KS 1855-3 distinguish two categories of solar heating systems: Factory Made solar heating systems and Custom Built solar heating systems. The classification of a system as Factory Made or Custom Built is a choice of the final supplier, in accordance with 
the following definitions.  
Factory Made solar heating systems are batch products with one trade name, sold as complete and ready to 
install kits, with fixed configurations. Systems of th is category are considered as a single product and 
assessed as a whole. 
 If a Factory Made Solar Heating System is modified by changing its configuration or by changing one or more 
of its components, the modified system is considered as a new system for which a new test report is 
necessary. Requirements and test methods for Factory Made solar heating systems are given in KS 1852-1 and KS 1852-2.  
Custom Built solar heating systems are either uniquely built, or assembled by choosing from an assortment of components. Systems of this category are regarded as a set of components. The components are separately 
tested and test results are integrated to an assessment of the whole system. Requirements for Custom Built 
solar heating systems are given in KS 1855-1; test methods are specified in KS 1855-2 and KS 1855-3. Custom Built solar heating systems are subdivided into two categories: 
 Large Custom Built systems are uniquely designed for a specific situation. In general HVAC engineers, 
manufacturers or other experts design them. 
 Small Custom Built systems offered by a company are de scribed in a so-called assortment file, in which all 
components and possible system configurations, marketed by the company, are specified. Each possible combination of a system configuration with components from the assortment is considered as one Custom 
Built system. 
 Table 1 shows the division for different system types: 
 PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008  
© KEBS 2007 — All rights reserved v Table 1 ⎯ Division for factory made and custom built solar heating systems 
 
Factory Made Solar Heating Systems 
(KS 1852-1, -2) 
 Custom Built Solar Heating Systems (KS 1855-1, -2, -3) 
 
Integral collector-storage systems for 
domestic hot water preparation 
 Forced-circulation systems for hot water preparation and/or 
space heating, assembled using components and 
configurations described in a documentation file (mostly small 
systems) 
 
Thermosiphon systems for domestic hot 
water preparation 
  
 
Forced-circulation systems as batch product with fixed configuration for domestic hot water preparation 
 Uniquely designed and assembled systems for hot water 
preparation and/or space heating (mostly large systems)  
 
NOTE 1 Forced circulation systems can be classified either as Fa ctory Made or as Custom Built, depending on the market approach  
chosen by the final supplier. 
 
NOTE 2 Both Factory Made and Custom Built systems are performance tested under the same set of reference conditions as specifie d 
in Annex B of KS 1852-2 and Annex A of KS 1855-2. In practice, the installation conditions may differ from these reference cond itions. 
 NOTE 3 A Factory Made system for domestic hot water preparation may have an option for space heating, however this option shoul d 
not be used or considered during testing as a Factory Made system. 
 PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
vi © KEBS 2008 — All rights reserved  
Contents 
 
1 Scope ......................................................................................................................... ................................ 1  
2 Normative references .......................................................................................................... ....................... 1  
3 Terms and definitions ......................................................................................................... ........................ 2  
4 Requirements .................................................................................................................. ........................... 2  
Annex A (informative)  Conformity assessment ....................................................................................................... 1 0 
Bibliography .................................................................................................................. .................................... 11  
 
 
  
 PUBLIC REVIEW DRAFT, SEPTEMBER 2008KENYA STANDARD KS 1852-1:2008  
© KEBS 2008 — All rights reserved 1  
 
Thermal solar systems and components — Factory made systems — 
Part 1: General requirements 
 
 1 Scope 
 
This Kenya Standard specifies requirements on durability, relia bility and safety for Factory Made thermal solar heating 
systems. The standard also includes provisions for evaluation of conformity to these requirements.  
 
The requirements in this standard apply to Factory Made solar systems as products. The installation of these systems 
itself is not considered, but requirements are given for the documentation for the installer and the user which is delivered 
with the system (see also 4.6).  
 
2 Normative references 
 
The following referenced documents are indispensable for the application of this Kenya Standard. For dated 
references, only the edition cited applies. For undated re ferences, the latest edition of the referenced document 
(including any amendments) applies.  
 
EN 806-1, Specifications for installations inside buildings conveying water for human consumption — Part 1: 
General  
 
ISO 6612, Windows and door height windows — Wind resistance tests  
 
ISO 15783, Seal-less rotodynamic pumps — Class II — Specification  
 
ISO 9906, Rotodynamic pumps — Hydraulic performance acceptance tests — Grades 1 and 2  
 
ISO 4126-1, Safety devices for protection against excessive pressure — Part 1: Safety valves  
 ISO 4126-2, Safety devices for protection against excessive pressure — Part 2: Bursting disc safety devices  
 
ISO 4126-3, Safety devices for protection against excessive pressure — Part 3: Safety valves and bursting 
disc safety device s in combination  
 
ISO 4126-4, Safety devices for protection against excessive pressure — Part 4: Pilot-operated safety valves  
 
ISO 4126-5, Safety devices for protection against excessive pressure — Part 5: Controlled safety pressure 
relief systems (CSPRS)  
 
ISO 4126-6, Safety devices for protection against excessive pressure — Part 6: Application, selection and 
installation of bursting disc safety devices  
 
ISO 4126-7, Safety devices for protection against excessive pressure — Part 7: Common data  
 
ISO 4126-9, Safety devices for protection against excessive pressure — Part 9: Application and installation of 
safety devices excluding stand-alone bursting disc safety devices  
 
ISO 9393-1, Thermoplastics valves for industrial applicatio ns — Pressure test methods and requirements — 
Part 1: General  
 
ISO 9393-2, Thermoplastics valves for industrial applications — Pressure test methods and requirements — 
Part 2: Test conditions and basic requirements  
 PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
2 © KEBS 2008 — All rights reserved KS 1851-1, Thermal solar systems and components — Solar collectors — Part 1: General requirements 
 
ISO 10721-1, Steel structures — Part 1: Materials and design  
 
ISO 10721-2, Steel structures — Part 2: Fabrication and erection  
 ISO/TR 11069, Aluminium structures — Material and design — Ultimate limit state under static loading  
 
KS 1851-2, Thermal solar systems and components — Solar collectors — Part 2: Test methods  
 
KS 1852-2, Thermal solar systems and components — Factory made systems — Part 2: Test methods  
 
ISO 9488, Solar energy — Vocabulary  
 
ISO/TR 10217, Solar energy — Water heating systems — Guide to material selection with regard to internal 
corrosion  
 
3 Terms and definitions 
 
For the purposes of this Kenya Standard, the terms and definitions given in ISO 9488 and the following apply.  
 
3.1 
expansion line  
for systems with closed expansion vessels, the connecting line between the collectors and the pressure expansion 
vessel  
 
For systems with open expansion vessels, the connecting line between the collector array and the open expansion 
vessel. 
 
3.2 
safety line  
for systems with closed expansion vessels: the connecting line between the collector array and the safety valve  
 
For systems with open expansion vessels: the connecting line between the collector array and the open expansion 
vessel 
 
3.3 
blow-off line  
connecting line between the outlet of the safety valve and the environment 
 
3.4 
factory-made solar system  
packaged solar energy system for the purpose of hot water pr eparation only, either of the close-coupled or remote-
store type. The system consists of either one integral comp onent or of a uniform set and configuration of components. 
It is produced under conditions, whic h are presumed uniform, and offered for sale under the same trade name.  
 
NOTE 1 A single system can be tested as a whole in a test laboratory, leading to representative results for all systems with th e same 
trade name, configuration, components and dimensions.  
NOTE 2 External auxiliary water heating devices that are placed in series with the Factory Made system are not considered to be  part 
of the system. Cold water piping from the cold water grid to the system as well as piping from the system to an external auxili ary heater 
or to tapping points is not considered to be part of the system. Piping between components of the Factory Made system is consid ered to 
be part of the system. Any integrated heat exchanger or piping for space heating option is not considered to be part of the sys tem. 
 
4 Requirements 
 
4.1 General  
 
The system shall fulfil general safety requirements, e.g. care shall be taken to avoid protruding sharp edges on the 
outside of the system.  PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
© KEBS 2008 — All rights reserved 3  
4.1.1 Suitability for drinking water  
 
The system shall conform to EN 806-1.  
 
4.1.2 Water contamination  
 
The system has to be designed to avoid water contamination for backflow from all circuits to drinking main supplies. 
 
4.1.3 Freeze resistance  
 
4.1.3.1 General  
 
The manufacturer shall state a minimal allowed temperature for the system. The parts of the system that are 
exposed to the outdoors shall be able to withstand freezing to this specified temperature without any permanent damage. 
 
The manufacturer shall describe the method of freeze protection used for the system. 
 
Any indoor components that are to be installed in places where temperatures can drop below 0 °C, shall be protected against freezing. 
 The freezing mechanism shall be tested in accordance with 5.1 of KS 1852-2. 
 
4.1.3.2 Freeze protection by means of antifreeze fluid  
 
The manufacturer shall define the composition of the heat  transfer fluid, including additives, allowed for the 
system. 
 
Precautions shall be taken to prevent the antifreeze flui d from deterioration as a result of high temperature 
conditions. These precautions shall be checked in accordance with 5.2 of KS 1852-2.  
NOTE In general the minimal allowed temperature of the system is equal to the freezing point of the antifreeze fluid. If the 
concentration of some antifreeze fluids ⎯ like glycols ⎯ exceeds a certain limit, they can freeze without damaging the system. In this 
case the minimal allowed temperature can be lower than the freezing point of the antifreeze fluid. 
 
4.1.4 Over temperature protection  
 
4.1.4.1 General  
 
The system shall have been designed in such a way that prolonged high solar irradiation without heat 
consumption does not cause any situation in which special action by the user is required to bring the system 
back to normal operation. 
 
When the system has a provision to drain an amount of drinking water as a protection against overheating, 
the hot water drain shall be constructed in such a way that no damage is done to the system or any other 
materials in the house by the drained hot water. The construction shall be such that there is no danger to 
inhabitants from steam or hot water from the drain (see 4.6.2). 
 
When the overheating protection of the system is dependent on electricity supply and/or cold water supply, 
this shall be stated clearly in the instructions and on the system (see 4.6.3 and 4.7). 
 
In case of drainback, system shall be checked in accordance with 5.1 of KS 1852-2. 
 
4.1.4.2 Scald protection  
 
When the system is tested in accordance with 5.2 of KS 1852-2, no steam shall escape from any tapping point. When this test has been performed with other than the highest irradiations this shall be mentioned in the documentation for the user (see 4.6.3). PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
4 © KEBS 2008 — All rights reserved  
For systems in which the temperature of the domestic hot water delivered to the user can exceed 60 °C, the 
assembly instructions shall mention th at an automatic cold water mixing device or any other device to limit 
the tapping temperature to at most 60 °C ± 5°C shall be installed on the solar heating system or elsewhere in 
the domestic hot water installation (see also 4.6.2). 
 
This device shall be able to withstand the maximum possible domestic hot water temperature from the solar 
heating system. 
 
4.1.4.3 Over temperature protection for materials  
 
The system shall have been designed in such a way that the maximal allowed temperature of any material in the system is 
never exceeded. 
 
4.1.5 Reverse flow protection  
 
The system shall contain provisions in order to prevent increased heat loss resulting from reverse flow in any circuit. This 
shall be checked in accordance with 5.10 of KS 1852-2. 
 
4.1.6 Pressure resistance  
 
The storage tank and heat exchangers in this tank shall withstand 1.5 times the manufacturer's stated maximum 
individual working pressures.  
 
When tested in accordance with 5.3 of KS 1852-2 to the above pressures, there shall be no visible permanent damage 
or leakage of the system components and interconnections. After the waiting period in the test, the hydraulic pressure shall 
not have dropped more than 10 % from the value measured at the start of the waiting period.  
 
When non-metallic materials are used in any circuit, this ci rcuit shall withstand the above-mentioned pressures for at least 
one hour when tested at high temperature in accordance with KS 1851-1.  
 
The drinking water circuit shall withst and the maximum pressure required by national/Kenya drinking water regulations for 
open or closed drinking water installations.  
 
The system shall have been designed in such a way that the maximal allowed pressure of any materials in the system is 
never exceeded.  
 
Every closed circuit in the system shall contain a safety valve. This safety valve shall withstand the highest temperature 
that can be reached at its location. It shall conform to ISO 4126. If thermostatic valves are used, these shall conform to ISO 
9393.  
 
4.1.7 Electrical safety  
 
If the system contains any electrical devices, these shall conform to IEC 60335-1 and IEC 60335-2-21.  
 
4.2 Materials  
 
Any parts of the system to be mounted outdoors shall be resistant to UV radiation and other weather conditions over the 
prescribed maintenance interval. When any maintenance or replacement of system parts is required in order to maintain 
the system's working order over a period of 10 years, this shall be clearly stated in the documents for the user.  
 
All materials used in the collector loop should conform to ISO/TR 10217 in order to avoid any internal corrosion. 
 
4.3 Components and pipework  
 
4.3.1 Collector  
 
For systems whose collector can be tested separately, the collector shall conform to KS 1851-1, with the exception of:  PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
© KEBS 2008 — All rights reserved 5  
⎯ internal pressure tests for absorber (see 5.3.2 of KS 1851-1);  
 
⎯ freeze resistance test (see 5.3.10 of KS 1851-1);  
 
⎯ thermal performance measurement (see 5.3.9 of KS 1851-1).  
 
For systems whose collector cannot be tested separately (for instance integrated collector-store systems), the whole 
system shall conform to KS 1851-1, with the exception of:  
 
⎯ internal pressure tests for abso rber (see 5.3.2 of KS 1851-1);  
 
⎯ exposure test (see 5.3.4 of KS 1851-1), on the condition that the installation manual for the system specifies 
that the empty system shall be protected agai nst prolonged exposure to solar radiation;  
 
⎯ internal thermal shock test (see 5.3.6 of KS 1851-1);  
 
⎯ freeze resistance test (see 5.3.10 of KS 1851-1); 
 
⎯ thermal performance measurement (see 5.3.9 of KS 1851-1).  
 
4.3.2 Supporting frame  
 
Manufacturer shall state the maximum possible loads for their supporting frame, in accordance with ISO 10721 (steel) and ISO/TR 11069 (aluminium) 
 
This shall be mentioned in the documents for the installer. 
 
4.3.3 Piping  
 
The materials of the collector loop shall conform to ISO/TR 10217. 
 
The design and materials in the system shall be such that there is no possibility of deforming, clogging or lime 
deposit in its circuits that will drastically influence the system performance and safety. 
 
Circulation pumps in the system shall conform to ISO 9906 and ISO 15783. 
 
4.3.4 Heat Exchangers  
 
If the system is intended for use in areas with high water hardness and at temperatures above 60 °C, heat 
exchangers in contact with drinking water shall be designed such that scaling is prevented or there shall be a 
facility for cleaning. 
 
NOTE High temperature difference between the metal surface of the heat exchanger and the surrounding drinking water mainly 
causes scaling. This can be avoided by increasing the heat exchanger area. 
 
4.3.5 Control system  
 
When present, the collector temperature sensor shall withstand stagnation conditions as specified in KS 
1851-2 without drifting by more than 1 K. 
 
When present, the store temperature sensor shall withstand 100 °C without altering by more than 1 K.  
The location and installation of all temperature sensors shall ensure a good thermal contact with the part of which the temperature shall be measured. The temperature sensors shall be insulated against ambient. PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
6 © KEBS 2008 — All rights reserved  
4.4 Safety equipment  
4.4.1 Safety valves 
 
Each section of the collector array, which can be shut off, shall be fitted with at least one safety valve. ICS 
systems shall be fitted with at least one safety valve, which may be integrated with an inlet combination. The 
safety valve shall resist the temperature conditions whic h it is exposed to, especially the highest temperature 
that can occur. The safety valve shall resist the heat transfer medium. The safety valve shall be dimensioned 
such that it can release the highest flow of hot water or steam that can occur. The dimension of the safety 
valve(s) shall be proved by suitable means. 
 
4.4.2 Safety lines and expansion lines 
 If the system is equipped with a safety line, this safety line shall not be capable of being shut off.  
If the system is equipped with a safety line and an expansion line, the safety line and expansion line shall be 
dimensioned such, that for the highest flow of hot water or steam that can occur, at no place in the collector 
loop the maximum allowed pressure is exceeded due to the pressure drop in these lines. The dimension of 
the safety line and expansion line shall be proved by suitable means.  
The expansion line and the safety line shall be connected and laid in such a way that any accumulations of dirt, scale or similar impurities are avoided. 
 
4.4.3 Blow-off lines 
 If the system is equipped with blow-off lines, these blow-off lines shall be laid in such a way that they cannot freeze up and that no water can accumulate within these lines. The orifices of the blow-off lines shall be 
arranged in such a way that any steam or heat transfer medium issuing from the safety valves does not 
cause any risk for people, materials or environment.  
4.5 Resistance to external influences 
 
The components, which are exposed to the effect of weather, shall resist weathering and shall be designed, 
constructed and fastened in such a way that they can withstand the weather. 
 In respect of lightning protection, the system should conform to IEC 61024-1. 
 
NOTE In Annex E of KS 1852-2, a test method based on IEC 61024-1 is given for solar domestic water heating systems. 
 
4.6 Documentation 
 
4.6.1 General  
With each Factory Made solar heating system, the manufacturer or official supplier shall deliver documents 
for assembly and installation (for the installer) and documents for operation (for the user). These documents 
shall be written in the official language(s) of the country of sale. These documents shall include all 
instructions necessary for assembly and operation, including maintenance, and draw attention to further 
requirements and technical rules that are concerned.  
4.6.2 Documents for the installer  
 
The assembly instructions shall be appropriate to the system and include information concerning:  
 
a) Technical data, at least those with respect to:  
 
1) layout of the system;  PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
© KEBS 2008 — All rights reserved 7  
2) location and nominal diameters of all external connections;  
 
3) an overview with all components to be delivered (suc h as solar collector, storage tank, support structure, 
hydraulic circuit, back-up provisions, control sys tem and accessories), with information on each 
component: type, electrical power, dimensions, weight, marks and mounting;  
 
4) maximum operating pressure of all fluid circuits in the system, such as the collector circuit, the domestic 
hot water line and the auxiliary heating circuit (in Pa);  
 
5) working limits: admissible temperatur es, pressures etc. throughout the system;  
 
6) type of corrosion protection;  
 
7) type of heat transfer fluid;  
 
b) Packing and transport of the whole system and/or co mponents and way of storage (outdoors, indoors, packed, 
not packed);  
 
c) Installation guidelines with recommendations concerning:  
 
1) mounting surfaces;  
 
2) distances to walls and safety with regard to frost;  
 
3) the way the entrance of piping into the building shall be finished (resistance against rain and moisture); 
 
4) the procedure to be followed for thermal insulation of pipes; 
 
5) the roof integration of the collector (if appropriate);  
 
6) for drain-back or drain-down systems, the minimal  pipe slope and any other instructions necessary to 
ensure proper draining of the collector circuit;  
 
d) If a support frame that is normally mounted outdoors is part of the system, the maximum value of vm (mean 
wind velocity) according to ISO 6612 and the statement that the system may only be installed in locations with 
lower values of vm; 
 
e) Method for pipe work connections; 
 
f) Types and sizes of the safety and security devices a nd their draining. The assembly instruction shall demand 
that any pressure relief valves from which steam can escape during normal or stagnation conditions shall be 
mounted, in such a way that no injuries, harm or dama ge can be caused by the escape of steam. When the 
system has a provision to drain an am ount of drinking water as a protec tion against overheating, the hot water 
drain shall be constructed in such a way that no damage  is done to the system or any other materials in the 
building by the drained hot water;  
 
g) The necessary control and safety devices including th e wiring diagram, including the need for a thermostatic 
mixing valve which limits the draw-off temperature to 60 °C, when this is required according to 4.1.4.2;  
 
h) Reviewing, filling and starting up of the system;  
 
i) Commissioning of the system;  
 
j) A checklist for the installer to c heck proper functioning of the system;  
 
k) The lowest temperature at which the system can withstand freezing;  PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
8 © KEBS 2008 — All rights reserved  
I) The required solar irradiation on the plane of the collect or or the minimum solar lamp irradiance at the plane of 
the collector for which overheating protection of the system has been tested according to 5.2 of KS 1852-2, 
and the requirement that the system shall not be used in  climate zones with higher irradiation values than 
these values.  
 
4.6.3 Documents for the user  
 
The operating instructions shall include information concerning:  
 
a) Existing safety and security components an d their thermostat adjustment where applicable;  
 
b) Implementation of the system drawing pa rticular attention to the facts that:  
 
1) prior to putting the system in operation it shall be checked that all valves are properly working and the 
system is filled with water and/or antifreeze flui d completely or according to the manufacturer's 
instructions;  
 
2) in the event of any failure condition a specialist shall be called in;  
 
c) Regular operation of safety valves;  
 
d) Precautions with regard to the ri sk of frost damage and/or overheating;  
 
e) The manner of avoiding failure when starting the system under frost or possible frost conditions;  
 
f) Decommissioning of the system;  
 
g) Maintenance of the system by a specialist, including frequency of inspections and maintenance and a list of 
parts that need to be replac ed during normal maintenance;  
 
h) Performance data for t he system (see also 4.8):  
 
1) the recommended load range for the system (in I/day) at specified temperature;  
 
2) the thermal performance and solar fraction of the s ystem according to 5.9 of KS 1852-2, for loads in the 
specified recommended load range;  
 
3) the annual electricity consumption for pumps, contro l systems and electrical valves of the system for the 
same conditions as specified for the thermal performan ce, assuming a yearly pump operating time of the 
collector pump of 2000 h;  
 
4) If the system contains devices for freeze protection th at cause electrical consumption, the electrical power 
of these devices (in W) and their charac teristics (e.g. switch-on temperatures);  
 
5) for a "solar-plus-supplementary system", the maxi mum daily hot water load which can be met by the 
system without any contribution from solar energy, according to 5.10 of KS 1852-2;  
 
i) The required solar irradiation on the plane of the collector or the minimum solar lamp irradiance at the plane of 
the collector for which overheating protection of the system has been tested according to 5.2 of KS 1852-2 and, 
the requirement that the system shall not be used in c limate zones with higher irradiation values than these 
values;  
 
j) When the overheating protection of the system is depende nt on electricity and/or cold water supply and/or the 
system being filled with drinking water,  the requirement to never switch off the electricity supply and/or the 
mains water supply, or that the system is not drained when there is high solar irradiation; 
 PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
© KEBS 2008 — All rights reserved 9 k) The fact that drinking water may be drained from the sys tem during high irradiation sit uations, if this method is 
used to prevent overheating;  
 
I) The lowest temperature at which the system can withstand freezing;  
 
m) Type of heat transfer fluid;  
 
n) In case of solar heating systems with emergency auxiliary heaters, instructions shall be issued that this 
emergency heater shall only be used for emergency heater purposes.  
 
4.7 Labelling  
 
Every system shall have the following information durably marked on a plate or label to be visible at installation:  
 
a) Name of manufacturer or res ponsible supplier of the system;  
 
b) System type indication;  
 
c) Manufacturing number or serial number;  
 
d) Year of manufacture ⎯ this may be included in the production or serial number in coded or clear form;  
 
e) Absorber and aperture area of the collector in m2; 
 
f) Nominal capacity of the storage vessel in L;  
 
g) Design pressure of the drinking water line in kPa;  
 
h) Collector heat transfer medium to be used;  
 
i) Permissible operating pressure of  the collector heat transfer medium in kPa or, in case the system has an 
open or vented collector circuit, a statement to this effect;  
 
j) When the overheating protection of  the system is dependent on electricit y or cold water supply and/or the 
system being filled with drinking water, a warning to this  effect shall be marked on the system. In case of 
dependency on the electricity supply, the mains plug of th e system shall also be clearly marked to this effect;  
 
k) Electrical power of all electric components.  
 
4.8 System performance  
 
The thermal performance of the system shall be tested according to one of the two test methods specified in 5.8 of KS 
1852-2. The performance shall be reported to the user in the format as specified in Annex A of KS 1852-2  (see also 
4.6.3).  
 
 PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
10 © KEBS 2008 — All rights reserved  
Annex A 
(informative) 
 
Conformity assessment 
 
In Table A.1, guidelines are given to a ssess whether one or more tests should be  repeated in order to assure that the 
changed product is still in conformity with the requirements. 
 
Table A.1 ⎯ Guidelines for repetition of tests in case that, components have been changed 
 
Component test  
 Anti- freeze 
fluid 
 Control 
unit 
 Collector
a 
 Store 
a 
 Heat 
exchanger
 Supporting 
frame  
 Collector piping 
or installation  
 
Freeze resistance  
 X 
 Xb 
 xc 
 xd 
  
  
 X c 
 
Over temperature  
  
 Xb 
 X 
 X 
  
  
 X 
 
Pressure resistance  
  
  
 X 
 X 
 X 
  
 X 
 
Collector  
  
  
 X 
  
  
  
  
 
Lightning protection  
  
  
 X 
 xd 
  
  
 xe 
 
Mechanical strength  
  
  
  
  
  
 X 
  
 
Thermal performance f 
 X9 
 X 
 X 
 X 
 X 
  
 xh 
 
Ability to cover load  
 X9 
 X 
 X 
 X 
 X 
  
 xh 
 
a For ICS systems, a change on the ICS system implies a change on both collector and the store  
 
b If the control unit is involved in frost or overheating protection.  
 
c Mainly for drain-back systems.  
 
d If the tank is placed outdoors.  
 
e If the material is changed (especially non-metal to metal)  
 
f When, in the judgement of the second/third party, changes have a minor character or will improve the performance of the system, retesting of 
the performance and the ability to cover the load is generally not necessary and the old results can be used.  
 
g Usually not affected, except when the viscosity of the fluid changes.  
 
h Mainly for thermosiphon systems  
 
 
 PUBLIC REVIEW DRAFT, SEPTEMBER 2008KS 1852-1:2008 
© KEBS 2008 — All rights reserved 11  
Bibliography 
 
[1] EN 1717, Protection against pollution of potable water in water installations and general requirements of 
devices to prevent pollution by backflow  
 
[2] KS 1855-1, Thermal solar systems and components — Custom built systems — Part 1: General 
requirements  
 
[3] KS 1855-2, Thermal solar systems and components — Custom built systems — Part 2: Test methods  
 
[4] KS 1855-3, Thermal solar systems and components — Custom built systems — Part 3: Performance 
characterization of stores for solar heating systems  
 
[5] IEC 61024-1, Protection of structures against fire, explosion and life hazards  
 
[6] IEC 60335-1, Household and similar electrical appliances ⎯ Safety ⎯ Part 1: General requirements  
 
[7] IEC 60335-2-21, Household and similar electrical appliances ⎯ Safety ⎯ Part 2-21: Particular requirements 
for storage water heaters