Ideal Boilers HE24 Installation And Servicing Instructions

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Ideal Boilers HE24 Installation And Servicing Instructions Manual pdf 10 page image

10 isar + programmer - Installation and ServicingGENERALGeneral1. The installation must comply with all relevant national andlocal regulations.2. The installation should be designed to work with flowtemperatures of up to 82 oC.3. All components of the system must be suitable for a workingpressure of 3 bar and temperature of 110 oC. Extra care shouldbe taken in making all connections so that the risk of leakageis minimised.The following components are incorporated within theappliance:a. Circulating pump.b. Safety valve, with a non-adjustable preset lift pressure of3 bar.c. Pressure gauge, covering a range of 0 to 6 bar.d. An 8-litre expansion vessel, with an initial charge pressureof 0.75 bar.4. 'Make-up' Water. Provision must be made for replacing waterloss from the system, either :a. From a manually filled 'make-up' vessel with a readilyvisible water level. The vessel should be mounted atleast 150mm above the highest point of the system andbe connected through a non-return valve to the system,fitted at least 150mm below the 'make-up' vessel on thereturn side of the radiators.Notesa. The method of filling, refilling, topping up or flushingsealed primary hot water circuits from the mains via atemporary hose connection is only allowed if acceptableto the local water authority.b. Antifreeze fluid, corrosion and scale inhibitor fluidssuitable for use with boilers having aluminium heatexchangers may be used in the central heating system.Advice should be sought from a local water treatmentcompany.BOILER CONTROL INTERLOCKSCaradon Ideal Limited recommend that heating systemsutilising full thermostatic radiator valve control of temperaturein individual rooms should also be fitted with a roomthermostat controlling the temperature in a space served byradiators not fitted with such a valve as stated in BS. 5449.Central heating systems controls should be installed toensure the boiler is switched off when there is no demandfor heating or hot water.When thermostatic radiator valves are used, the spaceheating temperature control over a living / dining area orhallway having a heating requirement of at least 10% of theboiler heat output should be achieved using a roomthermostat, whilst other rooms are individually controlled bythermostatic radiator valves. However, if the system employsthermostatic radiator valves on all radiators, or two portvalves without end switches, then a bypass circuit must befitted with an automatic bypass valve to ensure a flow ofwater should all valves be in the closed position.ELECTRICAL SUPPLYWARNING.This appliance must be earthed.Wiring external to the appliance MUST be in accordance withthe current I.E.E. (BS.7671) Wiring Regulations and any localregulations which apply. For IE reference should be made tothe current ETCI rules for electrical installations.The point of connection to the mains should be readilyaccessible and adjacent to the boiler.CONDENSATE DRAIN Refer to Frames 22 & 49.A condensate drain is provided on the boiler. This drain must beconnected to a drainage point on site. All pipework and fittings inthe condensate drainage system MUST be made of plastic - noother materials may be used.IMPORTANT.Any external runs must be insulatedThe drain outlet on the boiler is standard 21.5mm (3/4”) overflowpipe.3 SYSTEM REQUIREMENTS - Central HeatingSafety valve setting bar 3.0Vessel charge pressure bar 0.5 to 0.75System pre-charge pressure bar None 1.0System volume Expansion vessel(litres) volume (litres)25 1.6 1.850 3.1 3.775 4.7 5.5100 6.3 7.4125 7.8 9.2150 9.4 11.0175 10.9 12.9190 11.9 14.0200 12.5 14.7250 15.6 18.4300 18.8 22.1For other system volumesmultiply by the factor across 0.063 0.074orb. Where access to a 'make-up' vessel would be difficult,by pre-pressurisation of the system.The maximum cold water capacity of the systemshould not exceed 143 litres, if not pressurized.However, if the system is to be pressurized, theefficiency of the expansion vessel will be reduced anda larger vessel (or smaller system volume) may benecessary. If the capacity of the vessel is notconsidered sufficient for this, or for any other reason,