3Concord CXD - InstallationCONTENTSAir Supply. ......................................................................... 9Boiler Assembly - exploded view. ................................ 10Boiler Clearances. ............................................................ 6Burner Assemblies - exploded views. .............................CXD 40-60. ................................................................. 27CXD 70-100 ................................................................ 28Casing Assembly. .......................................................... 13Chimney System. ............................................................. 9Commissioning. ............................................................. 18Controls. ........................................................................... 5Electrical Connections. ................................................. 15Electrical Supply. ............................................................. 9Fault Finding. ................................................................. 33Gas Safety Regulations ................................................... 3Gas Supply. ....................................................................... 9Hydraulic Resistance. ...................................................... 6Initial Lighting. ................................................................ 18Installation. ..................................................................... 10Mandatory Requirements. ............................................... 8Option Kits. ....................................................................... 5Pump. ................................................................................ 7Servicing. ........................................................................ 25Short List of Parts. ......................................................... 36Site Assembled Boilers. ................................................ 31Static Head Requirements. ............................................. 7System Connections. ..................................................... 12Ventilation. ........................................................................ 9Water Circulation. ............................................................ 5Water Connections. ......................................................... 5Water Treatment. .............................................................. 7Wiring Diagrams. ........................................................... 16Concord CXD 40-CXD 100 (Natural gas) B.G. Certified - P.I. No. 87/AQ/103 Destination Countries: GB & IEINTRODUCTIONCONSTRUCTIONBOILER BODYThe sectional boiler body is of cast iron and is supplied assembledon a sheet steel combustion chamber with an integral draughtdiverter. The boiler can be supplied in sectioned form to specialorder for site assembly - refer to the section headed ‘Instructionsfor Site Assembled Boilers’.CASINGThe casing is manufactured in stove enamelled sheet steel andis easily assembled on site.BURNERSThe 3 burners are of stainless steel construction.Gas Safety (Installation and Use) Regulations,1994, amendments 1996 or rules in force.It is the law that all gas appliances are installed and serviced by aCORGI registered installer (identified by ) in accordance withthe above regulations. Failure to install appliances correctly couldlead to prosecution. It is in your own interest, and that of safety, toensure that the law is complied with.The Concord CXD 40/100 range of boilers has been tested andcertified by British Gas to prEN656 for use with Natural gas only.Multiple boiler installationsThe Concord CXD range is certificated for use inmultiple boiler installations, providing that the followingconditions are satisfied.1. A downdraught thermostat kit MUST be fitted to ALL boilersin the installation.2. A maximum of 6 boilers may be used with a single flueheader.3. For clearances see Frame 2.A comprehensive guide to multiple installations of Concord CXDboilers is available.WARNING. Failure to use a downdraught kit on every boiler in amultiple boiler installation will negate the certification of theinstallation and therefore contravene the essential requirementsof the Gas Appliance Directive.Note. The CXD 40, CXD 50 and CXD 60 boilers are intended foruse as commercial boilers and are NOT certified for use in domesticapplications. A domestic installation is defined as an installationwhere the boiler takes its combustion air from a living space orfrom a room directly or indirectly connected with the living space.It is important, therefore, that no external control devices - e.g.flue dampers, economisers etc., are directly connected to thisappliance unless covered by these Installation and ServicingInstructions or otherwise recommended by Caradon PlumbingLimited in writing. If in doubt please enquire.Any direct connection of a control device not approved by CaradonPlumbing Limited could invalidate the British Gas Certification,the normal appliance warranty and could also infringe the GasSafety Regulations. Table 1, Table 2 and the descriptive noteswhich follow contain all the essential data likely to be required bythe installer.