Page 9910 INSTALLATION REQUIREMENTSThe boiler installation must be in compliance with relevant standards and Building Regulations.See Section 4.2 of this manual.10.1 General Requirements10.1.1 HearthThe boiler has a hearth temperature of between 50°C and 85°C and should be stood on a rigid,non-porous, non-combustible base, which is not softened by warmth, to comply with theBuilding Regulations.10.1.2 Service Access24” (600mm) Clearance should be provided above and in front of the boiler to allow for routineservicing. Pumped, System and Combination Boiler models may require access to the top. Thisis of particular relevance to appliances located beneath work surfaces. Such work surfacesshould be easily removable for service access.10.1.3 Heating SystemThe heating system should be installed to current HVAC codes of practice. Before installing theboiler the new or existing system must be thoroughly flushed to clear all sludge or other foreignmatter such as solder, steel wool and copper filings. The system must be cleansed, neutralisedand protected from corrosion in accordance with BS12828, BS12831, BS14336 and BS7593using suitable cleansing agent(s) and inhibitor(s) and carried out in accordance with thecleanser / inhibitor manufacturers’ instructions. The system must be dosed to the concentrationsspecified by the inhibitor manufacturer (refer to the Technical Data section of this manual for thevolume of the boiler when calculating the total system volume). Inhibitor concentrations must bemonitored and maintained on an ongoing basis. Failure of components such as, but not limitedto heat exchangers, condensing units, pumps, auto air vents and pressure relief valves, etc. dueto corrosion products in the system will not be covered by warranty.10.1.4 Air VentsThe plastic plugs of the auto air vent(s) factory-fitted to the boiler must be loosened when fillingthe system in order to bleed the air from the boiler. Air must also be vented from combinationboilers using the manual air vents located in the heat store tank and boiler flow pipe assembly.The plugs should be tightened again once filling is complete. In addition to any factory fitted airvents it is recommended that another air vent is fitted at the highest point in the system. Wherethe flow pipework drops down from the boiler the installer must ensure that an automatic airvent is fitted to the top of the pipework to prevent air being trapped in the boiler.On B-Series models, the boiler MUST be fitted with an automatic air vent as shown in Section4.5.1. If an air vent is not fitted, air will accumulate in the secondary heat exchanger and causethe boiler to malfunction. Failure to fit an air vent will invalidate ALL warranties.10.1.5 Drain CockFor all appliances not factory-fitted with drain cocks, one should be fitted to the boiler drain bosslocated to the left hand side of the burner. Drain cocks should also be fitted to the lowest pointsin the system to allow the system to be completely drained.
