Heating systems in buildings - Procedure for the preparation of documents for operation, maintenance and use - Heating systems requiring a trained operator
This standard specifies requirements for providing documents for the operation, mainte-nance and use of heating systems in buildings requiring a trained operator.
Parts of heating systems covered by this standard are:
- boilers or heat supply equipment, including control;
- safety arrangements, including air supply;
- district heating heat exchangers, heat meters and primary domestic hot water production facilities;
- energy sources, storage and supply;
- flue gas systems, including condensate treatment and disposal;
- heat distribution network, including associated components;
- heat emitters, including accessories;
- systems for control and supervision;
- water treatments and procedures (e.g. chemical and physical, including antifreeze).
Heizungsanlagen in Gebäuden - Betriebs-, Wartungs- und Bedienungsanleitungen - Heizungsanlagen, die qualifiziertes Bedienungspersonal erfordern
Diese Norm legt Anforderungen an eine Dokumentation für Betrieb, Wartung und Bedienung von Heizungsanlagen in Gebäuden fest, bei denen qualifiziertes Bedienungspersonal erforderlich ist.
Im Rahmen dieser Norm gehören zu einer Heizungsanlage:
3 Heizkessel oder Einrichtungen zur Wärmeversorgung, Steuerungs- und Regelsysteme;
3 Sicherheitseinrichtungen, einschließlich Einrichtungen zur Verbrennungsluftzufuhr;
3 Übergabestationen für Fernwärme, Heizkostenverteiler und primärseitige häusliche Warmwasserbereitung;
3 Brennstoffversorgung, -lagerung und -zufuhr;
3 Abgassysteme, einschließlich Kondensatbehandlung und -entsorgung;
3 Einrichtungen zur Wärmeabgabe, einschließlich dazugehöriger Komponenten;
3 Heizflächen, einschließlich Zubehör;
3 Systeme für Steuerung/Regelung und Überwachungssysteme;
3 Wasseraufbereitung sowie sonstige Behandlungsverfahren für Wasser (z.B. chemische, physikalische oder sonstige Verfahren einschließlich Behandlungen wegen Frostschutz).
Systemes de chauffage dans les bâtiments - Instructions de conduite, maintenance et utilisation - Systemes de chauffage exigeant un opérateur professionnel
La présente Norme européenne spécifie des exigences relatives aux documents pour la conduite, la maintenance et l'utilisation des systemes de chauffage dans les bâtiments nécessitant un opérateur professionnel pour la conduite.
Les parties de systemes de chauffage prises en compte dans la présente norme sont les suivantes :
chaudieres ou systemes d'adduction de chaleur, y compris la commande ;
dispositifs de sécurité, y compris l'alimentation en air ;
installations de production d'eau chaude domestique ;
stockage et alimentation en énergie ;
conduits de fumée, y compris le recueil et l'évacuation des condensats ;
réseau de distribution de chaleur, y compris les composants associés ;
émetteurs de chaleur, y compris les accessoires ;
systemes de commande et supervision ;
traitement des eaux et modes opératoires (par exemple, chimique, physique, y compris antigel).
Grelni sistemi v stavbah – Postopki za pripravo dokumentov za delovanje, vzdrževanje in uporabo – Grelni sistemi, ki zahtevajo usposobljenega upravljavca
Standards Content (sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Grelni sistemi v stavbah – Postopki za pripravo dokumentov za delovanje, vzdrževanje in uporabo – Grelni sistemi, ki zahtevajo usposobljenega upravljavcaHeizungsanlagen in Gebäuden - Betriebs-, Wartungs- und Bedienungsanleitungen - Heizungsanlagen, die qualifiziertes Bedienungspersonal erfordernSystemes de chauffage dans les bâtiments - Instructions de conduite, maintenance et utilisation - Systemes de chauffage exigeant un opérateur professionnelHeating systems in buildings - Procedure for the preparation of documents for operation, maintenance and use - Heating systems requiring a trained operator91.140.10Sistemi centralnega ogrevanjaCentral heating systemsICS:Ta slovenski standard je istoveten z:EN 12170:2002SIST EN 12170:2004en01-februar-2004SIST EN 12170:2004SLOVENSKISTANDARD
SIST EN 12170:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12170July 2002ICS 91.140.10English versionHeating systems in buildings - Procedure for the preparation ofdocuments for operation, maintenance and use - Heatingsystems requiring a trained operatorSystèmes de chauffage dans les bâtiments - Instructionsde conduite, maintenance et utilisation - Systèmes dechauffage exigeant un opérateur professionnelHeizungsanlagen in Gebäuden - Betriebs-, Wartungs- undBedienungsanleitungen - Heizungsanlagen, diequalifiziertes Bedienungspersonal erfordernThis European Standard was approved by CEN on 11 April 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12170:2002 ESIST EN 12170:2004
EN 12170:2002 (E)2ContentspageForeword..........................................................................................................................................................................3Introduction.....................................................................................................................................................................51Scope........................................................................................................................................................................52Terms, definitions and abbreviations....................................................................................................................63General requirements for the OM&U documents.................................................................................................74Contents of the OM&U documents........................................................................................................................8Annex A (informative)
Example extracted from an OM&U Instruction Manual.......................................................13Annex B (informative)
Example of an address list.....................................................................................................30SIST EN 12170:2004
EN 12170:2002 (E)3ForewordThis document EN 12170:2002 has been prepared by Technical Committee CEN/TC 228 “Heating systems inbuildings”, the secretariat of which is held by DS.This European Standard shall be given the status of a national standard, either by publication of an identical text or byendorsement, at the latest by January 2003, and conflicting national standards shall be withdrawn at the latest byJanuary 2003.This document includes two informative annexes A and B, and no normative annexes.The subjects covered by CEN/TC 228 are the following:- design of heating systems (water based, electrical, etc.);- installation of heating systems;- commissioning of heating systems;- instructions for operation, maintenance and use of heating systems;- methods for calculation of the design heat loss and heat loads;- methods for calculation of the energy performance of heating systems.Heating systems also include the effect of attached systems such as hot water production systems.All these standards are system standards, i.e. they are based on requirements addressed to the system as a wholeand not dealing with requirements to the products within the system.Where possible, reference is made to other CEN or ISO standards, a.o. product standards. However, use of productscomplying with relevant product standards is no guarantee of compliance with the system requirements.The requirements are mainly expressed as functional requirements, i.e. requirements dealing with the function of thesystem and not specifying shape, material, dimensions or the like.The guidelines describe ways to meet the requirements, but other ways to fulfil the functional requirements might beused if fulfilment can be proved.Heating systems differ among the member countries due to climate, traditions and national regulations. In some casesrequirements are given as classes so national or individual needs may be accommodated.In cases where the standards contradict with national regulations, the latter should be followed.SIST EN 12170:2004EN 12170:2002 (E)4(intended blank page)SIST EN 12170:2004
EN 12170:2002 (E)5IntroductionThis European Standard is intended to be used in the preparation of documents for operation, maintenance and use ofheating systems for new projects and renovation projects as well as in the updating of existing such documents.Documents for operation, maintenance and use are hereafter termed OM&U documents.The objective of this standard is to ensure that the OM&U documents contain essential information to a minimumstandardised level.The intention of the OM&U documents is to provide a durable record of the system design and the set of instructionsand requirements for operation, maintenance and use of the heating system. Relevant instructions and requirementsfor operation, maintenance and use are necessary in order to ensure safety, rational use of energy and environmentalquality management.Heating systems requiring a trained operator are those systems, designed for operation by persons having specifictechnical training, knowledge or skill in respect of these systems.Users of this standard may be:- technical authors of OM&U documents;- system designers (as guidance when preparing their part of the OM&U documents);- manufacturers (as guidance when establishing the OM&U instructions and requirements for the equipment);- installers and commissioning personnel (as guidance when preparing their part of the OM&U documents andsubmitting the documents to those persons responsible for compiling the OM&U documents);- commissioning engineers (as guidance when verifying conformity with OM&U instructions and requirements andexamining the OM&U documents);- owners (as guidance when specifying the requirements for the OM&U documents for their projects).1 ScopeThis European Standard specifies requirements for providing documents for the operation, maintenance and use ofheating systems in buildings requiring a trained operator.Parts of heating systems covered by this standard are:- boilers or heat supply equipment, including control;- safety arrangements, including air supply;- district heating heat exchangers, heat meters and primary domestic hot water production facilities;- energy sources, storage and supply;- flue gas systems, including condensate treatment and disposal;- heat distribution network, including associated components;SIST EN 12170:2004
EN 12170:2002 (E)6- heat emitters, including accessories;- systems for control and supervision;- water treatments and procedures (e.g. chemical and physical, including antifreeze).2 Terms, definitions and abbreviationsFor the purposes of this European Standard, the following terms and definitions apply.2.1operationthose actions necessary to make available the services, which the system has been designed to provide2.2maintenancecombination of all technical, administrative and managing actions necessary to retain an item in, or restore it to, a statein which it can perform an intended function2.3useaction of receiving the services, which the system has been designed to provide2.4itemany part, component, device, sub-system, functional unit, equipment or system that can be individually consideredNOTE 1
Any item may consist of hardware, software or both, and may also in particular cases include people.NOTE 2
A number of items (e.g. a population of items or a sample) may itself be considered as an item.2.5maintenance plandescription of the methods, procedures and resources required for the sustaining support of an item throughout its lifecycle2.6preventive maintenancemaintenance carried out at predetermined intervals or according to prescribed criteria, which is intended to reduce theprobability of failure or degradation of the functioning of an item2.7corrective maintenancemaintenance carried out after fault recognition, which is intended to restore an item into a state in which it can performan intended functionNOTE
In French, the term “dépannage” sometimes implies a provisional restoration.2.8inspectionprocedure or action to check whether or not maintenance is required2.9repairpart of corrective maintenance which is comprised of actions performed on an itemSIST EN 12170:2004
EN 12170:2002 (E)72.10design parameterssystem operating requirements as specified by the system designer2.11OM&Uoperation, maintenance and use3 General requirements for the OM&U documents3.1 ExtentOM&U documents shall be compiled and provided with any installed heating system of the type covered by thisstandard.3.2 OM&U instructionsA set of OM&U instructions shall be prepared and form part of the OM&U documents. The OM&U instructions shall beprepared in the official language of the country where the system is installed.The OM&U instructions shall include a record of the design operating and maintenance requirements for the system,as specified by the system designer1).3.3 Manufacturers’ instructionsThe OM&U documents shall incorporate the manufacturers’ instructions for the appliances and components of theheating system. The system designer’s specification for the heating system shall be paramount to the manufacturers’instructions. Whenever the system designer utilises any component in a manner not specified in the manufacturer’sinstructions for that component, this shall be explained and highlighted in the OM&U documents.3.4 Form and formatThe OM&U documents shall be produced in a clearly legible and lasting form. The printing shall be indelible and thematerial shall be appropriate for normal expected usage.The format, style and number of copies of the OM&U documents shall be agreed with the system designer and theowner of the heating system. A list of contents2) for the OM&U documents shall be provided in front.A copy of the OM&U documents shall be prepared in a form appropriate for the use by those persons concerned in theoperation, maintenance and use of the heating system.The International System of Units (SI) shall be applied in the OM&U documents. The definitions given in this standardshall be applied when preparing the OM&U documents3).
1) These instructions may form part of a set of comprehensive instructions for the entire building.2) Alphanumeric sequence should be adopted.3) Alternative terms should be avoided.SIST EN 12170:2004
EN 12170:2002 (E)83.5 AvailabilityThe OM&U documents shall be prepared and compiled prior to the conclusion of contractual obligations. The OM&Udocuments shall be available at hand-over of the heating system.3.6 RevisionThe OM&U documents shall include provision for updating the documents following any alteration in the specificationfor the heating system (i.e. the design) and the specifications for appliances, components, operation, maintenance anduse of the heating system.4 Contents of the OM&U documents4.1 General informationThe OM&U documents shall contain the following general information about the heating system, as specified by thesystem designer:- a general description of the system. The description shall give information about the purpose and the services forwhich the system has been designed and intended. It shall include advice on interfaces with all attached systemsand associated sub-systems;- the following statement: “These OM&U documents have been compiled according to EN 12170.”;- plans showing layout of building, appliances and components, as guidance to those concerned with the operation,maintenance, servicing and repair of the system;- schematic plant or system drawings;- a full description or other information about concealed piping and appliances and components, which areconsidered free of maintenance;- make, type, duty and data on appliances and components of the system;- commissioning information and data;- commissioning and balancing report;- operation, servicing, maintenance and repair history of the system and sub-systems;- an address list;- references to applicable health and safety regulations, including risk assessment;- documents from manufacturers of appliances and components of the system (e.g. manufacturers’ data sheets);- cost control schedules for operation, maintenance and repair;- the name of the author(s) 4) of the OM&U documents, the date of preparation and any date of revision 5). Anychange in authorship shall be clearly indicated;- any warranty conditions;- any specific literature on appliances and components of the system (e.g. from manufacturers) to which cross-
4) Individual(s) or organisation(s) responsible for the preparation and compilation of the OM&U documents.5) A numerical sequence should be adopted.SIST EN 12170:2004
EN 12170:2002 (E)9references are given in the OM&U documents 6);- updates (amendments);- information on the location of available OM&U documents, including archive.An example extracted from particular sets of OM&U documents is given in annex A (informative). An example of anaddress list is given in annex B (informative).4.2 Instructions for operation4.2.1 Operation scheduleThe operation schedule shall include the design specifications for operation. A schedule of operating times andtemperatures, together with other operating parameters, as applicable during different operational states and seasonsand for individual zones and sub-systems, shall be provided.4.2.2 Operation proceduresProcedure for start-up and shut-down of the heating system shall be included. Daily or routine start-up and shut-downprocedures shall be separately described and detailed.The recommended methods for isolation of components, zones or sub-systems, for operational purposes, shall beincluded.4.2.3 Operation of individual zones or sub-systemsA separate operational description for the operation of facilities in individual zones or sub-systems shall be provided,unless there is no control option for the zone or sub-system. This part of the instructions shall be prepared according tothe requirements of the system designer and shall include additional advice to the persons operating individual zonesor sub-systems. The risks in connection with improper operation of individual zones or sub-systems shall be described.This part of the instructions shall, as necessary, include information and advice such as:- a general description of the sub-system installed in the individual zone;- the exact location of control devices (e.g thermostats);- an outline of the methods for bringing an individual zone or sub-system into operation and for taking it out ofoperation;- operational relationships between the heating system, attached systems (e.g. air conditioning system, swimmingpool) and other building systems (e.g. boiler room ventilation system, independent solar system).4.2.4 Economical operationThe instructions shall include the system designer’s recommendations for meeting the design comfort parametersthrough an ecological, economical and energy conscious operation of the heating system.
6) This can be done by including only relevant parts or sections of such literature.SIST EN 12170:2004
EN 12170:2002 (E)104.2.5 Controls and safety systemsInstructions for the operation of controls and safety systems of the heating system shall be included.4.2.6 Operational recordProvision shall be made for recording operational events. The record shall contain fields for description of the event,identification of the person recording the event and the date of the event.Record of fuel deliveries and consumption should be prescribed as specified.A separate record shall be kept for individual zones and sub-systems, as specified by the system designer.4.2.7 Routine inspectionsAny requirements or instructions for routine inspections and actions, given by the system designer or by themanufacturers of appliances and components of the system, shall be included.4.2.8 MalfunctionThe instructions should include information on actions to be taken in the event of a system or equipment malfunction.Where required and specified by the owner of the system, a check list for fault diagnosis shall be provided.4.2.9 SafetySafety procedures shall be included. Matters related to fuel, chimney, water treatment and electrical isolation shall bedescribed.Procedures for emergency shut-down shall be included (such procedures should include situations of fire, fuel or waterleakage and other foreseeable emergency situations).4.3 Instructions for maintenance4.3.1 GeneralThe instructions shall include a maintenance plan, as specified by the system designer. Particular reference shall bemade to regular assessment of system safety, performance and fulfilment of statutory requirements.The methods for isolation of the system or sub-systems, for maintenance and repair purposes, shall be included.4.3.2 Product maintenanceInstructions for the inspection and maintenance of appliances and components of the system shall be in accordancewith the manufacturers’ requirements and the system designer’s specifications. Any statutory requirements shall beincluded in the instructions.4.3.3 InspectionThe instructions shall include provision for inspection schedules and records, as specified by the system designer.SIST EN 12170:2004
EN 12170:2002 (E)114.3.4 Preventive maintenanceThe instructions shall include provision for preventive maintenance schedules and records, as specified by the systemdesigner.4.3.5 Corrective maintenanceThe instructions shall include provision for repair and replacement records.4.4 Instructions for useThe OM&U documents shall comprise instructions for use of the heating system.4.4.1 GeneralA separate operational description for use of the heating system in individually controlled zones shall be included.4.4.2 Instructions for the userThe instructions shall include the system designer’s recommendations for operating the controls of each individualzone and for conserving energy while maintaining the specified internal design conditions.User instructions provided by manufacturers of appliances and components shall be included.4.4.3 Content of the instructions for the userThe instructions shall include information and the system designer’s advice and recommendations as follows:- a general description of the system installed in the individual zone;- depiction of the exact location of control devices available to the user (e.g. thermostats, temperature controls);- an outline of the methods for bringing the system of the zone into use and for taking it out of use;- the methods for meeting the design comfort parameters through an ecological, economical and energy conscioususe of the heating system;- procedures for reporting defects;- depiction of the location of individual heat meters, where applicable, and user guidance on performing readingsthereof;- the effects of using other systems and facilities on the operation of the heating system.4.4.4 SafetyThe risks in connection with improper use of the systems installed in the individual zones shall be described.The actions to be taken by the user in emergency situations shall be described.SIST EN 12170:2004EN 12170:2002 (E)12(intended blank page)SIST EN 12170:2004
EN 12170:2002 (E)13Annex A(informative)Example extracted from an OM&U Instruction ManualA.1GeneralThe purpose of this annex A is to provide guidance to the author(s) of OM&U documents on a possible structure for thedocuments and form of presentation (refer to 4.1).This informative annex A (except for the present clause) consists of sample text, extracted from more than two actualOM&U Instruction Manuals, which have been prepared for different specific buildings. The numbering of clauses andsub-clauses has been adapted to the format of an annex to a standard.For the purpose of making the sample text anonymous and limiting the extent of this annex A, the following legend isapplied:· XXXXXXXX – is used in place of specific data such as names, dates, parts of and locations in buildings, etc.;· Etc. or etc. – is used to indicate that a list can be extended;· Etc., etc. or etc., etc. – is used to indicate that a text can be extended.The sample text of this annex A does not cover all requirements given in the standard.EXAMPLE: User instructions are not covered by the sample text.Any part of the sample text of this annex A can or can not be relevant for any particular set of OM&U documents.A.2Title and contents list of the manualA.2.1TitleOPERATING AND MAINTENANCE INSTRUCTION MANUAL FOR ADMINISTRATION AND AMENITY BUILDINGXXXXXXXXClient:XXXXXXXXMechanical and Electrical Services Designed and Installed By:
XXXXXXXXTechnical Author: XXXXXXXXDate of original issue: XXXXXXXXRevised by: XXXXXXXXDate and number of revision: XXXXXXXXA.2.2ForewordA.2.2.1Purpose of the manualThis manual has been prepared to assist the plant operators and maintenance engineers in familiarising themselves withSIST EN 12170:2004
EN 12170:2002 (E)14the mechanical and electrical plant and systems installed by XXXXXXXX in the XXXXXXXX BuildingA.2.2.2Structure of the manualThe Mechanical and Electrical Services Operating and Maintenance Manual is contained in ten binders and each binderis given a unique volume number, i.e. 1 to 10. Within the ten volumes, the manual is divided into two main sections, theMechanical Services (volumes 1 to 4) and the Electrical Services (volumes 5 to 8). Volumes 9 and 10 contain the recorddrawings for both the mechanical services and the electrical services. Each main section is sub-divided into 13 parts asfollows in A.2.3.A.2.3List of contents of the manual· PART 1 - INTRODUCTION (see A.3)General introduction to the building and its use, design and performance data, general abbreviations, plantabbreviations (including plant labelling information), list of record drawings, list of plant items and suppliers and themajor plant identification schedule.· PART 2 - DESCRIPTION OF SERVICES (see A.4)General description of the installed systems and plant· PART 3 - OPERATING PROCEDURES (see A.5)Details on the operation of the main plant items and systems, including preliminary checks, start-up, day-to-dayoperating checks, shut-down and emergency procedures· PART 4 - EQUIPMENT SCHEDULES (see A.6)Technical details of all plant items and equipment, including manufacturer, type, duty, etc.· PART 5 - MAINTENANCE PROCEDURES AND SCHEDULES (see A.7)Procedures and schedules for maintenance of the plant and equipment· PART 6 - CONTROLS (see A.8)Brief description with cross-references to a separate specialist manual on controls· PART 7 - SAFETY AND FAULT FINDING PROCEDURES (see A.9)General notes on health and safety at work and general safety proceduresDetails on fault tracing· PART 8 - RECOMMENDED SPARES (see A.10)Recommendations for the minimum requirement of spare parts to be held in stock· PART 9 – MANUFACTURERS’ CERTIFICATES (not further detailed in this annex A)Test certificates for individual manufacturers' equipment· PART 10 - COMMISSIONING AND TEST DATA (not further detailed in this annex A)Commissioning reports and test data for the installed plant and systems· PART 11 – MANUFACTURERS’ LITERATURE (not further detailed in this annex A)Individual manufacturers' technical literature collated into alphabetical order with divider cards· PART 12 - A3 RECORD DRAWINGS (not further detailed in this annex A)A3 size record drawings· PART 13 - OPERATION AND MAINTENANCE RECORD (not further detailed in this annex A)Sample schedules for the recording of operation and maintenanceEach part is provided, where applicable, with its own list of contents which details the information headings within thatpart.SIST EN 12170:2004
EN 12170:2002 (E)15A.3Part 1 - IntroductionA.3.1List of contentsPart 1 - Introduction - includes the following:· General Description of the Building (see A.3.2)· The Services (see A.3.3)· Basis of Design (see A.3.4)· Abbreviations (see A.3.5)- General Abbreviations- Plant and Equipment Abbreviations- Plant- Pipe Line Valves and Equipment- Etc.· List of Record Drawings (see A.3.6)- Comfort Cooling and Ventilation Services- Hot and Cold Water Services- HVAC Controls Schematics- Etc.· List of Plant Items and Suppliers· Major Plant Identification Schedule· Plant Labelling- Introduction- Plant Label- Equipment Label- Valve Label- Etc.· Etc.A.3.2General description of the buildingThe building is a three-level structure comprising an XXXXXXXX area and the ground and first floors. Entrance pavilions,located on the north and west aspects, are joined to the main body of the building by ground floor link bridges.The ground floor of the building comprises etc., etc.A.3.3The servicesThe mechanical services installation covered by this manual comprises the following:· a LPHW heating system incorporating boiler plant, fill and pressurisation unit, circulating pumps, etc.;· the domestic hot water services;· a chilled water cooling system incorporating chiller units, fill and pressurisation unit, circulating pumps, etc.;· comfort cooling and ventilation systems;· the cold water services distribution system including a water softening facility;· the fire protection services;· plumbing services.Specialist manuals have been prepared for the sprinkler system and the control system. These manuals are contained inPart 11 - Manufacturers' Literature.Major plant items are situated in the West Pavilion XXXXXXXX boilerhouse, the chiller plantroom in the West Pavilionfirst floor plantroom and the North Pavilion first floor plantroom.SIST EN 12170:2004
EN 12170:2002 (E)16A.3.4Basis of designThe mechanical services Systems have been designed to satisfy the following criteria:· External Conditions- Summer24 °C db / 19 °C wb
- Winter-5 °C db 100% RH (-12 °C frost protection)· Internal Conditions - Comfort Cooled Areas- First Floor Offices, XXXXXXX Offices and Business Centre- Summer22 °C ± 1 °C db- Winter20 °C ± 1 °C db- Staff Facilities and Medical Centre- Summer22 °C ± 1 °C db- Winter20 °C ± 1 °C db· Internal Conditions - Heating Only Areas- Etc.· Ventilation- Etc.· Noise Ratings- Etc.· Media Conditions- LPHW Heating85 °C flow / 70 °C return- Chilled Water6 °C flow / 12 °C return- HWS65 °C flow- Etc.A.3.5AbbreviationsFor the purpose of this manual, the following definitions apply:· dbDry Bulb· wb Wet bulb· LPHWLow Pressure Hot Water· LTHWLow Temperature Hot Water· Etc.A.3.6List of record drawingsDwg.No.Title7410Plan - Chiller Area7411Boiler Houseetc.7414Plan - Zone 2etc.7441Heating Pipework Schematicetc.A.4Part 2 - Description of servicesA.4.1List of contentsPart 2 - Description of services - includes the following:SIST EN 12170:2004
EN 12170:2002 (E)17· Heating System (see A.4.2)- General Description (see A.4.2.1)- Constant Temperature Heating Circuit (see A.4.2.2)- Variable Temperature Heating Circuit- Boiler Plant (see A.4.2.3)- Fill and pressurisation Unit- Water Treatment- Trace Heating- Heating Plant Controls (see A.4.2.4)- General Note (see A.126.96.36.199)- Constant Temperature Pumps (see A.188.8.131.52)- Variable Temperature Pumps (see A.184.108.40.206)- Variable Temperature Heating Circuit- Boilers- Gas Safety Circuit- Frost Protection- Alarms- Fire Alarm Interlock- Load Shedding- Etc.- Etc.· Domestic Hot Water Services· Chilled Water System- General Description- Chilled Water Distribution Circuit- Etc.· Comfort Cooling and Ventilation Systems- First Floor Offices Comfort Cooling System- North Pavilion Concourse Ventilation System- Etc.· Cold Water Services· Etc.A.4.2Heating systemA.4.2.1General descriptionLow pressure hot water (LPHW) for the heating of the building and to provide the primary heat source for the HWScalorifiers is generated by three gas-fired boilers and is pump-circulated through two distribution pipework systemsnamely:· the constant temperature heating circuit;· the variable temperature heating circuit.The system is of the closed, pressurised design incorporating a fill and pressurisation unit.
The unit is arranged toaccommodate the system's thermal expansion and to introduce a softened water make-up supply at a constant cold-fillpressure.A.4.2.2Constant temperature heating...