Saunier-Duval-Thema-Classic-F24e-Installation-manual

2 General Information2.3 Gas SupplyThe gas installation must be in accordance with the relevantstandards.In GB this is BS 6891.In IE this is the current edition of I.S.813 "Domestic gasinstallation".The supply from the governed meter must be of adequate sizeto provide a steady inlet working pressure of 20mbar (8in wg) atthe boiler.Important NoticeIf your boiler has been converted to use L.P.G. Propane thefollowing note applies:Propane cylinders are under pressure and should never bestored or used indoors residentially.They should only be kept outside.Under no circumstances should L.P.G. Propane cylinders befitted or stored in basement areas or boiler houses.On completion, test the gas installation for soundness using thepressure drop method and suitable leak detection fluid, purge inaccordance with the above standard.3 Heating System Design1Bypass fully shut5097002345Open 1/4 turnOpen 1/2 turnOpen 1 turnOpen 2 turnsAvailable pressure (kPa)40302010123450 500 1000(10 kPa = 1 m WG)Flow rate through heating system (I/h)Diagram 3.1The installation of the boiler must comply with the requirementsof the current issue of BS6798, in Ireland, refer also to thecurrent edition of I.S.813"Domestic Gas Installations".In GB it is necessary to comply with the Water Supply (WaterFittings) Regulations 1999 (for Scotland, the Water Byelaws2000, Scotland).To comply with the Water Regulations your attention is drawnto: The Water Regulations guide published by the WaterRegulation Advisory Service (WRAS) which gives full details ofthe requirements.In IE the requirements given in the current edition of I.S.813"Domestic Gas Installations" and the current BuildingRegulations must be followed.• The F24E and F18E SB are for use with sealed central heatingsystems.• Heating surfaces may consist of radiators, convectors or fanassisted convectors.• The safety valve is an integral part of the boiler and it cannotbe adjusted.• The circulation pump is integral with the boiler.• Pipe sectional areas shall be determined in accordance withnormal practices, using the output/pressure curve(diagram 3.1). The distribution system shall be calculated inaccordance with the output requirements of the actual system,not the maximum output of the boiler. However, provision shallbe made to ensure sufficient flow so that the temperaturedifference between the flow and return pipes be less than orequal to 20°C. The minimum flow rate is shown in table 1.• The system can be fitted with a lockable control valve ifnecessary in the main flow or return pipes shown as valve 'A'in diagram 3.2.• The piping system shall be routed so as to avoid any airpockets and facilitate permanent venting of the installation.Bleed fittings must be provided at every high point of thesystem and on all radiators.• The total volume of water permitted for the heating systemdepends, amongst other things, on the static head in the coldcondition. The expansion vessel on the boiler is pressurised at0.5 bar and allows a maximum system volume of 110 litres foran average temperature of 75°C and a maximum servicepressure of 3 bar. This pressure setting can be modified atcommissioning stage if the static head differs. An additionalexpansion vessel can be fitted to the system if required, seediagram 3.2.Guidance on vessel sizing is also given in a current issue of aBS5449 and BS7074 Part 1, for IE refer to the current editionof I.S.813 "Domestic Gas Installations".• Provision shall be made for a drain valve at the lowest pointof the system.• Where thermostatic radiator valves are fitted, not all radiatorsmust be fitted with this type of valve, and in particular, wherea room thermostat is installed.• In the case of an existing installation, it is ESSENTIAL that thesystem is thoroughly flushed prior to installing the new boiler,using a proprietary product from Fernox or Sentinel.13 4000124050-2