Flexicom cx combination boiler - installation and service manual

9 Safety Discharge Valve and Condensate Connections9.1 Safety Discharge ValveTake the safety discharge pipe, supplied in the pipe pack andthe union nut and seal, supplied in the loose items pack andfit as shown in diagram 9.1.This must be extended, using not less than 15mm o.d. pipe,to discharge, in a visible position, outside the building, facingdownwards, preferably over a drain.To ease future servicing it is advisable to use a compressiontype fitting to extend the safety discharge valve tube.The pipe must have a continuous fall and be routed to aposition so that any discharge of water, possibly boiling,or steam cannot create any danger to persons, damage toproperty or external electrical components and wiring.126679.2 Condensate Trap and Siphonic DrainConnectionA flexible condensate outlet pipe is fitted and should be usedto couple the condensate trap and siphonic drain to a 22mmto 25mm O.D. non corrosive plastic pipe (overflow pipe), seediagram 8.2.IMPORTANT: Please remove the bung from the flexible pipebefore fitting to a drain outlet pipe.NOTE: the pipe should have a fall of a least 2.5 o 44mm/metreaway from the boiler.Condensate should, if possible be discharged into thehousehold internal drainage system. If this is not practicable,discharge can be allowed into the external household drainsor a purpose designed soak away, refer to diagram 9.2.It is recommended that any external condensate drain pipe isprotected and also preferably of 32mm diameter, to preventfreezing in adverse weather conditions.The condensate is discharged periodically in ‘slugs’ bysiphonic action.It is not necessary to provide air breaks or extra traps in thedischarge pipe as there is already a 75mm high trap insidethe boiler. Fitting an extra trap may cause the boiler siphon towork incorrectly.Refer to BS5546 or BS6798 for advice on disposal of boilercondensate.Diagram 9.119