Ideal Boilers i 24 Installation & Servicing Instructions Manual

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Ideal Boilers i 24 Installation & Servicing Instructions Manual Manual pdf 24 page image

24INSTALLATIONi combi - Installation and Servicing21 CONDENsaTE DRaIN137 156CondensateDrainCondensateDrain9498This appliance is fitted with a siphonic 75mm condensate trapsystem that requires filling before operating the appliance for the1st time or after maintenance.All condensate pipework should conform to the following:a. Where a new or replacement boiler is being installed, access toan internal ‘gravity discharge’ termination should be one of themain factors considered in determining boiler location.b. Plastic with push fit or solvent connections.c. Internal plastic pipe work a minimum of 19mm ID (typically22mm OD)d. External plastic pipe must be a minimum of 30mm ID (typically32 OD) before it passes through the sleeved wall.e. All horizontal pipe runs, must fall a minimum of 45mm per metreaway from the Boiler.f. External & unheated pipe work should be kept to a minimumand insulated with Class “O” waterproof pipe insulation.g. All installations must be carried out in accordance to therelevant connection methods as shown in the “Condensateinstallation diagrams” & BS6798:2009h. Pipe work must be installed so that it does not allow spillageinto the dwelling in the event of a blockage (through freezing)i. All internal burrs should be removed from the pipe work and anyfittings.In order to minimise the risk of freezing during prolonged very coldspells, one of the following methods of terminating condensatedrainage pipe should be adopted.Internal Drain ConnectionsWherever possible, the condensate drainage pipe should be routedto drain by gravity to a suitable internal foul water discharge pointsuch as an internal soil and vent stack or kitchen or bathroomwaste pipe etc. See Figs 1 and 2.Condensate pumpWhere gravity discharge to an internal termination is not physicallypossible or where very long internal pipe runs would be requiredto reach a suitable discharge point, a condensate pump of aspecification recommended by the boiler or pump manufacturershould be used terminating into a suitable internal foul waterdischarge point such as an internal soil and vent stack or internalkitchen or bathroom waste pipe etc. (fig 3).External Drain ConnectionsThe use of an externally run condensate drainage pipe shouldonly be considered after exhausting all internal termination optionsas described previously. An external system must terminate at asuitable foul water discharge point or purpose designed soak away.If an external system is chosen then the following measures mustbe adopted:The external pipe run should be kept to a minimum using the mostdirect and “most vertical” route possible to the discharge point, withno horizontal sections in which condensate might collect.- For connections to an external soil/vent stack see Fig 4.Insulation measures as described should be used.- When a rainwater downpipe is used, an air break must beinstalled between the condensate drainage pipe and thedownpipe to avoid reverse flow of rainwater into the boilershould the downpipe become flooded or frozen, see Fig 5.- Where the condensate drain pipe terminates over an openfoul drain or gully, the pipe should terminate below the gratinglevel, but above water level, to minimise “wind chill” at the openend. The use of a drain cover (as used to prevent blockage byleaves) may offer further prevention from wind chill. See Fig 6.- Where the condensate drain pipe terminates in a purposedesigned soak away (see BS 6798) any above groundcondensate drain pipe sections should be run and insulated asdescribed above. See Fig 7Unheated Internal areasInternal condensate drain pipes run in unheated areas, e.g. loftsbasements and garages, should be treated as external pipe.Ensure the customer is aware of the effects created by a frozencondensate and is shown where this information can be found inthe user manual.Boilerwith 75mmsealedcondensatetrap Min Ø 19mmInternal pipeMinimumconnectionheight up to 3storeysSoil & vent stack≥ 45075Boilers without 75mm sealedcondensate trap must be fitted witha 75mm trap and visible air breakSink/basin/bath orshowerBoilerwith 75mmsealedcondensatetrapMin Ø 19mmInternal pipeInternal soil & vent stackBoilers without 75mm sealedcondensate trap must be fitted witha 75mm trap and visible air break75≥ 100≥ 100Figure 1 - Connection of Condensate Drainage Pipe toInternal Soil & Vent StackFigure 2 - Connection of a Condensate Drainage PipeDownstream of a Sink, Basin, Bath or Shower Water Trap toInternal Soil Vent Stackcontinued . . . . .INsTaLLaTION