- 4 -INTRODUCTION0020140122_02 - 05/13EN- The Health and Safety at Work Act, Control of SubstancesHazardous to Health (COSHH).- Any electrical work must conform to BS7671 and part P of thebuilding regulations where applicable.Where no specifi c instructions are given, reference should bemade to the relevant British Standard Code of Practice.In IE, the installation must be carried out by a competent personapproved at the time by the Health and Safety Executive andinstalled in accordance with the current edition of I.S.813“Domestic Gas Installations”, the current Building Regulationsand reference should be made to the current ETCI rules forElectrical Installation.GB: the following Codes of Practice apply: BS4814, BS6798,BS5440 Part 1 and 2, BS5546 Part 1, BS5449, BS6891, BS6700,BS7074 Part 1 and 2, BS7593, BS7671.IE: I.S.813, BS5546, BS 5449, BS 7074, BS 7593.NOTE: For further information, see the current issue of theBuilding Regulations, approved document L1 ( in the UK) and thefollowing current issues of:1) Central heating system specifi cation (CheSS) and2) Controls for domestic central heating system and hot water.BRECSU.Benchmark places responsibilities on both manufacturersand installers. The purpose is to ensure that customers areprovided with the correct equipment for their needs, that it isinstalled, commissioned and serviced in accordance with themanufacturer’s instructions by a competent person approved atthe time by the Health and Safety Executive and that it meets therequirements of the appropriate Building Regulations.The Benchmark Checklist can be used to demonstrate compliancewith Building Regulations and should be provided to thecustomer for future reference.Installers are required to carry out installation, commissioningand servicing work in accordance with the Benchmark Codeof Practice which is available from the Heating and HotwaterIndustry Council who manage and promote the Scheme.Visit www.centralheating.co.uk for more information.2.3.2 Domestic Hot WaterAll domestic hot water circuits, connections, fi ttings must bein accordance with the relevant standards and water supplyregulations.2.3.3 Electrical SupplyThe control unit MUST be earthed. All system components shallbe of an approved type and all wiring to current I.E.E. wiringregulations. External wiring must be correctly earthed, polarisedand in accordance with the relevant standards.In GB, this is BS 7671.In IE, this is the current edition of ETCI rules.The control unit MUST be connected to a permanent 230V ac,50Hz supply.2.4 CE labelThe CE mark indicates that the products described in theseinstructions are in compliance with the following directives:- European Directive Num. 2004-108 of the European Parliamentand the Council regarding electromagnetic compatibility- European Directive Num. 2006-95 of the European Parliamentand the Council regarding low voltage.3 Description of the product3.1 Product OverviewThe control unit provides a system solution which permits eBUScontrollers to be combined with room thermostats, valves,multizone heating and domestic hot water cylinder systems.There are 2 functional modes that can be selected with the rotaryswitch :- Multizone mode (position 0) with VR66 functions.- Monozone mode (position 1) with VR65 functions.230V~ CYL.2 1DHWCH1 CH2ON DHW OFF12-+BUS NTC01Legend1 Rotary switch