Ideal Boilers Classic LXFF 230 Installation And Servicing Manual

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Classic FF - Installation & Servicing 7Boiler Size FF 230 240 250 260 270 280 2 100Boiler kW 8.8 11.7 14.6 17.6 20.5 23.4 29.3Output Btu/h x 1000 30 40 50 60 70 80 100Water Flow l/min 11.4 15.2 19.0 22.8 26.5 30.3 38.0Rate gal/h 150 200 250 300 350 400 500Pressure mbar 22.0 20.4 31.5 41.7 54.8 77.0 106Loss in wg 8.9 8.3 12.6 16.7 22.0 30.9 42.5GENERALTHERMOSTATIC RADIATOR VALVESCaradon Plumbing 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 not fittedwith such a valve as stated in BS. 5449.When thermostatic radiator valves are used, the space heatingtemperature control over a living / dining area or hallway having aheating requirement of at least 10% of the boiler heat output shouldbe achieved using a room thermostat, whilst other rooms areindividually controlled by thermostatic radiator valves. However, ifthe system employs thermostatic radiator valves on all radiators,or two port valves without end switches, then a bypass must befitted to ensure a flow of water should all valves be in the closedposition.ELECTRICAL SUPPLYWARNING. The appliance MUST be efficiently earthed.Wiring external to the appliance MUST be in accordance with thecurrent I.E.E. (BS.7671) Wiring Regulations and any localregulations which apply.The point of connection to the mains should be readily accessibleand adjacent to the boiler, except that for bathroom installations;the point of connection to the mains MUST be situated outside ofthe bathroom.Note. Where a room sealed appliance is installed in a roomcontaining a bath or shower then the appliance and any electricalswitch or appliance control utilising mains electricity should be sosituated that it cannot be touched by a person using the bath orshower. See Frame 36 for details.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 ofthe permanent air vents, required in the cupboard/compartment, are specified as follows and are related tomaximum rated heat 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 thefreezing of 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, nor arethey 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.IMPORTANTDraining taps MUST be located in accessible positions, whichpermit the draining of the whole system - including the boiler andhot 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 11OC (20 OF) temperature differential,are shown in Table 5.Maximum boiler operating temperature should be 82 o C (180 o F).WATER TREATMENTThese boilers incorporate a cast iron heat exchanger. As part ofthe installation the central heating system should be thoroughlyflushed with appropriate water treatment in order to comply withBS7593:1992.Caradon Plumbing Ltd. recommend the use of Fernox or BetzDearborn water treatment products which must be used inaccordance with the manufacturers instructions. For furtherinformation contact :-Fernox Manufacturing. Co. Ltd., Tandem House, Marlowe Way,Croydon, Surrey CRO 4XS, tel 0870 5601 5000 orBetz Dearborn Ltd., Widnes, Cheshire, tel. 0151 424 5351IMPORTANT. Any other treatment for this product will render theguarantee of Caradon Plumbing Ltd. INVALID.Notes.1. If an inhibitor is used, and in hard water areas where treatmentto prevent lime deposits is necessary, it is most important thatthe water treatment MUST be maintained at the correctconcentrations recommended by the treatment manufacturer.2. Artificially softened water must not be used in the system, underany circumstances .Table 4 - High and low vent areasBoiler Air from room/internal Air direct fromspace, cm (in2 ) outside, cm (in2)FF230 102 (16) 51 (8)FF240 135 (21) 68 (11)FF250 170 (26) 83 (13)FF260 198 (31) 102 (16)FF270 231 (36) 116 (18)FF280 264 (41) 132 (21)FF2 100 340 (52) 170 (26)Table 5 - Water flow rate and pressure loss