Avanta open vent boiler installation and service guide

ø8 mm2x2.2.3 Mounting the Remeha Avanta• Remove template from the box.• Using the template determine and mark the position of themounting bracket and flue outlet.• Drill the (Ø 8 mm) holes.• Fit the (Ø 8 mm) plugs.• Core drill the (Ø 125 mm) hole for the flue outlet• Fit (Ø 6 mm) screws into the plugs.• Remove boiler from the box and mount on bracket.• The boiler should be mounted on a suitable vertical wallwhich is able to support the weight of the boiler.• The boiler should be mounted in a room which, evenduring severe cold weather, remains frost-free, or frostprotection controls MUST be fitted.• If the boiler is to be installed in a timber framed building,please refer to British Gas publication: ‘Guide for GasInstallations in Timber frame Housing’, reference DM2.• Make sure the boiler and any open connections areprotected from building etc. dust during the installation.• There must be a 3 amp fused switched spur within 1 m ofthe boiler.• Provision must be made for the condensate discharge.2.3 Water-side connections2.3.1 Water flowThe central heating system should not require a bypass,unless all radiators are fitted with TRV’s or when the systemcontrols could allow the boiler and pump to operate whenthere is no flow. Where a bypass has to be fitted, the bypassmust be placed at least 1.5 metres away from the boiler.The ‘abc ® ’ control also monitors the temperature differenceacross the flow and return connections and the rate of temperaturerise and will automatically regulate the boiler outputto ensure that it remains operational for as long as possiblewithout the need to ‘lock out’ requiring a manual reset.2.3.2 System PumpThe system pump must be wired directly to the boiler terminalstrip and be capable of providing the nominal flow at designconditions against the combined resistance of the boiler andsystem.fig. 05Mounting the Avanta59970.LT.GB.W7H.002The minimum flow rate is 1.05 m 3 /h (0.29 l/s) at full load and15°C differential across flow and return. To operate at dT =11°C the flow rate must be 1.37 m 3 /h (0.38 l/s)Higher resistance systems may require a higher duty pump.The maximum power consumption of the pump may notexceed 150 W /1.5 amps.The connection of the pump is described in par. 2.89