Ideal Boilers Classic LXRS 245 P Installation And Servicing

6 Classic LXRS, RS - Propane InstallationGENERALIMPORTANT.The boiler must be vented (not on sealed systems.)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,to drain the BOILER ONLY, in the event of the system drain plugbeing unable to do so. The hydraulic resistances of the boilers,at MAXIMUM OUTPUT with an 11oC (20 OF) temperaturedifferential, are shown in Table 5.Table 5 - Water flow rate and pressure lossBoiler Size RS 245 RS 255Boiler kW 13.2 16.1Output Btu/h 45 000 55 000Water Flow l/min 19.0 22.8Rate gal/h 250 300Pressure mbar 34.0 45.0Loss in wg 13.6 18.0WATER CIRCULATION SYSTEMThe boiler must NOT be used for direct hot water supply. Forthe types of system and correct piping procedure refer to'Introduction' and Frame 1.The central heating system should be in accordance withBS. 6798 and, in addition, for smallbore and microboresystems, BS. 5449.The domestic hot water system, if applicable, should be inaccordance with the relevant recommendations of BS. 5546.Copper tubing to BS. 2871:1 is recommended for watercarrying pipework.The hot water storage cylinder MUST be of the indirect typeand should preferably be manufactured of copper.Single feed, indirect cylinders are not recommended andMUST NOT be used on sealed systems.The hot water cylinder and ancillary pipework not forming partof the useful heating surface should be lagged to prevent heatloss and any possible freezing - particularly where pipes runthrough roof spaces and ventilated underfloor spaces.THERMOSTATIC RADIATOR VALVESCaradon Plumbing Ltd. 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.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 radiatorvalves.However, if the system employs thermostatic radiator valves onall radiators, or two port valves without end switches then abypass must be fitted in order to ensure a flow of water shouldall the valves be in the closed position.ELECTRICAL SUPPLYWiring external to the appliance MUST be in accordance withthe current I.E.E. (BS 7671) Wiring Regulations and any localregulations which apply.The point of connection to the mains should be readilyaccessible and adjacent to the boiler, except for bathroominstallations; the point of connection to the mains MUST besituated outside of the bathroom.Note.Where a room sealed appliance is installed in a roomcontaining a bath or shower then the appliance and anyelectrical switch or appliance control utilising mains electricityshould be so situated that it cannot be touched by a personusing the bath or shower.Boiler Air from room/internal Air directSpace cm 2 (in2 ) Outside cm2 (in 2)RS 245 170 (26) 83 (13)RS 255 198 (31) 102 (16)TERMINALThe terminal assembly can be adapted to accommodatevarious wall thicknesses. Refer to Frame 4 - 'Unpacking'.AIR SUPPLYDetailed recommendations for air supply are given inBS.5440:2. 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.The air vents must either communicate with room/internalspace, or be direct to outside air. The minimum effectiveareas of the 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.Table 4 - High and low vent areas