Ideal Boilers Classic FF 340 LF Installation And Servicing Manual

Also see for Classic FF 340 LF: User guide

Classic FF 340 - 360 LF - Installation & Servicing 7GENERALAIR SUPPLYDetailed recommendations for air supply are given inBS.5440:2. In IE refer to I.S. 813:2002.The following notes are for general guidance:1. It is NOT necessary to have a purpose provided air vent inthe room or internal space in which the boiler is installed.2. If the boiler is to be installed in a cupboard or compartment,permanent air vents are required (for cooling purposes) inthe cupboard/compartment, at both high and low levels. Theair vents must either communicate with room/internal space,or be direct to outside air. The minimum effective areas of thepermanent air vents, required in the cupboard/compartment,are specified in Table 4 and are related to maximum ratedheat input.3. Both air vents MUST communicate with the same room orinternal space or MUST be on the same wall to outside air.4. In siting the air vents care must be taken to avoid the freezingof pipework.WATER CIRCULATION SYSTEMThe boiler must NOT be used for direct hot water supply. For thetypes of system and correct piping procedure refer to 'Introduction'and Frame 1.The central heating system should be in accordance with BS.6798and, in addition, for Smallbore and Microbore systems, BS. 5449.The domestic hot water system, if applicable, should be inaccordance with the relevant recommendations of BS. 5546. Coppertubing to BS. 2871:1 is recommended for water carrying pipework.The hot water storage cylinder MUST be of the indirect type andshould preferably be manufactured of copper.Single feed, indirect cylinders are not recommended and MUSTNOT be used on sealed systems.The appliances are NOT suitable for gravity central heating, norare they suitable for the provision of gravity domestic hot water.The hot water cylinder and ancillary pipework, not forming part ofthe useful heating surface, should be lagged to prevent heat lossand any possible freezing - particularly where pipes run throughroof spaces and ventilated under floor spaces.Boilers not fitted to a sealed system must be vented.IMPORTANTA minimum length of 1m of copper pipe MUST be fitted to bothflow and return connections from the boiler before connection toany plastic piping. This applies to ALL types of installation.Draining taps MUST be located in accessible positions, whichpermit the draining of the whole system - including the boilerand hot water storage vessel. They should be at least 1/2" BSPnominal size and be in accordance with BS. 2879.The boiler is fitted with a special drain plug, which is provided, todrain the BOILER ONLY, in the event of the system drain plugbeing unable to do so. The hydraulic resistance of the boilers, atMAXIMUM OUTPUT with an 11 OC (20 OF) temperature differential,are shown in Table 5.Maximum boiler operating temperature should be 82 oC (180 oF).WATER TREATMENTThese boilers incorporate a cast iron heat exchanger.IMPORTANT. The application of any other treatment to thisproduct may render the guarantee of Caradon Ideal LimitedINVALID.Caradon Ideal Limited recommend Water Treatment inaccordance with theBenchmark Guidance Notes on WaterTreatment in Central Heating Systems.Caradon Ideal Limited recommend the use of Fernox, GE BetzSentinel or Salamander water treatment products, which mustbe used on accordance with the manufacturers instructions.For further information contact:Fernox Manufacturing Co. Ltd, Cookson Electronics, Forsyth Road,Sheerwater, Woking, Surrey. GU21 5RZ. Tel. +44 (0) 1799 521133orG E Betz Ltd, Sentinel Division, Foundry Lane, Widnes, Cheshire,WA8 8UD. Tel. +44 (0) 151 424 5351orSalamander Engineering Ltd, Unit 24, Reddicap Trading Estate,Sutton Coldfield, West Midlands B75 7BU. Tel. +44 (0) 121 378 0952Notes.1. It is most important that the correct concentration of the watertreatment products is maintained in accordance with themanufacturers' instructions.2. If the boiler is installed in an existing system any unsuitableadditives MUST be removed by thorough cleansing.BS7593:1992 details the steps necessary to clean adomestic heating system.3. In hard water areas, treatment to prevent limescale may benecessary - however the use of artificially softened water isNOT permitted.4. Under no circumstances should the boiler be fired beforethe system has been thoroughly flushed.BOILER CONTROL INTERLOCKSCaradon Ideal Limited recommend that heating systemsutilising full thermostatic radiator valve control of temperature inindividual rooms should also be fitted with a room thermostatcontrolling the temperature in a space served by radiators notfitted with such a valve as stated in BS. 5449.Central heating systems controls should be installed to ensurethe boiler is switched off when there is no demand for heating orhot water.When thermostatic radiator valves are used, the space heatingtemperature control over a living / dining area or hallway havinga heating requirement of at least 10% of the boiler heat outputshould be achieved using a room thermostat, whilst otherrooms are individually controlled by thermostatic radiator valves.However, if the system employs thermostatic radiator valves onall radiators, or two port valves without end switches, then abypass circuit must be fitted with an automatic bypass valve toensure a flow of water should all valves be in the closed position.Table 4 - High and low vent areasBoiler Air from room/internal Air direct fromspace, cm (in2 ) outside, cm (in2)FF 340 LF 135 (21) 68 (11)FF 350 LF 170 (26) 83 (11)FF 360 LF 198 (31) 102 (16)Boiler Size FF 340 LF FF 350 LF FF 360 LFBoiler kW 11.7 14.7 17.6Output Btu/h x 1000 40 50 60Water Flow l/min 15.2 19.0 22.8Rate gal/h 200 250 300Pressure mbar 20.4 31.5 41.7Loss in wg 8.3 12.6 16.7Table 5 - Water flow rate and pressure loss