Ideal Boilers LOGIC COMBI C24 Installation & Servicing

Also see for LOGIC COMBI C24: User guide

12Installation and ServicingSECTION 1 - GENERAL2. It is important that the position of the terminal allows the freepassage of air across it at all times.3. Minimum acceptable spacing from the terminal to obstructionsand ventilation openings are specified inTable 4.4. Where the lowest part of the terminal is fitted less than 2mabove a balcony, above ground or above a flat roof to whichpeople have access then the terminal MUST be protected by apurpose designed guard.Terminal guards are available from boiler suppliers. (Ask forTFC flue guard model no. K6 - round, plastic coated). In caseof difficulty contact:TFC Group. Tel. + 44 (0) 01732 351 680Tower House, Vale Rise Fax. + 44 (0) 01732 354 445Tonbridge. Kent TN9 1TB www.tfc-group.co.ukEnsure that the guard is fitted centrally.5. The flue assembly shall be so placed or shielded as to preventignition or damage to any part of any building.6. The air inlet/products outlet duct and the terminal of the boilerMUST NOT be closer than 25mm to combustible material.Detailed recommendations on the protection of combustiblematerial are given in BS.5440-1.IMPORTANT. It is essential to ensure, in practice, that productsof combustion discharging from the terminal cannot re-enter thebuilding or buildings through any openings into the building suchas ventilators, windows, doors, or other sources of natural airinfiltration, such as forced ventilation openings etc.If products of combustion re-entry is identified or suspected thisshould be immediately investigated and corrected following theguidance provided in the current Gas Industry Unsafe SituationProcedure.1.8 GAS SUPPLYThe local gas supplier should be consulted, at the installationplanning stage, in order to establish the availability of an adequatesupply of gas. An existing service pipe must NOT be used withoutprior consultation with the local gas supplier.The boiler MUST be installed on a gas supply with a governedmeter only.A gas meter can only be connected by the local gas supplier orby a Gas Safe Registered Engineer. In IE by a Registered GasInstaller (RGII).An existing meter should be checked, preferably by the gassupplier, to ensure that the meter is adequate to deal with the rateof gas supply required.It is the responsibility of the Gas Installer to size the gas installationpipework in accordance with BS.6891. Whilst the principle of the1:1 gas valve ensures the Logic range is able to deliver it is fulloutput at inlet pressures as low as 14mb, other gas appliances inthe property may not be as tolerant. When operating pressuresare found to be below the minimum meter outlet of 19mb theseshould be checked to ensure this is adequate for correct and safeoperation.Allowing for the acceptable pressure loss of 1mb across theinstallation pipework, it can be assumed that a minimum permittedoperating pressure of 18mb will be delivered to the inlet ofthe appliance. (Reference BS.6400-1 Clause 6.2 PressureAbsorption).The external gas cock could further reduce the operating pressurewhen measured at its test point. The pressure drop is relative tothe heat input to the boiler (kW), refer to graph below.00.511.522.530 10 20 30 40 50Pressure drop (mbar )Heat Input to Boiler (kW)Gas Cock Pressure DropIMPORTANT.Ensure all gas valve connections are gas tight with a gassoundness check up to the gas control valve.Installation pipes must be fitted in accordance with BS.6891. In IErefer to IS.813:2002.The complete installation MUST be tested for gas tightness and purgedas described in the above code.1.9 FLUE INSTALLATIONPluming will occur at the terminal so terminal positions where thiscould cause a nuisance should be avoided.The flue must be installed in accordance with the recommendationsof BS.5440-1.In IE refer to I.S. 813.The following notes are intended for general guidance:1. The boiler MUST be installed so that the terminal is exposed toexternal air.* Only one reduction down to 25mm is allowable per installationotherwise BS5440-1 dimensions must be followed.Flue Terminal Positions Min. Spacing*1. Directly below, above or alongside an openwindow, air vent or other ventilation opening. 300mm2. Below guttering, drain pipes or soil pipes. 25mm*BS5440-1 75mm3. Below eaves. 25mm*BS5440-1 200mm4. Below balconies or a car port roof. 25mm*BS5440-1 200mm5. From vertical drain pipes or soil pipes. 25mm*BS5440-1 150mm6. From an internal or external corner or to a 25mm*boundary alongside the terminal. BS5440-1 300mm7. Above adjacent ground, roof or balcony level. 300mm8. From a surface or a boundary facing the terminal. 600mm9. From a terminal facing a terminal. 1,200mm10. From an opening in a car port(e.g. door or window) into dwelling. 1,200mm11. Vertically from a terminal on the same wall. 1,500mm12. Horizontally from a terminal on the wall. 300mmVertical Terminals13. Above the roof pitch with roof slope of all angles. 300mmAbove flat roof. 300mm14. From a single wall face. 300mmFrom corner walls. 300mm15. Below velux window 2000mm16. Above or side of velux window 600mmTable 4 - Balanced Flue Terminal Position