Atag iR 12

Installation & Servicing instructions ATAG iR-Range
18
9.5 Condensation drain pipe
TheATAGcondensingboilerhasthe>88%EfcientSEDBUK2009forhighenergyefciencyinheatingand
domestichotwater.TheATAGwallhunggasredcondensingboilercontainasiphoniccondensatetrapto
collect and realease condensate. The amount of condensate formed is determind by the type of boiler and
the water temperature produced by the boiler.
Condensate pipework.
Use plastic pipework of an internal diameter no less then 19mm ID (typically 22mm OD).
Routing of the pipework,
The condensate pipework must fall at least 45mm per metre away from the boiler, taking the shortest
practicle route to the termination point.
Supportthepipeatleastevery50cmfornearhorizontalsectionsand1metreforverticalsections.
Whereverpossible,thecondensatepipeworkshouldberoutedinternallytopreventfreezing.Inorderto
minimisetheriskoffreezingduringprolongedverycoldspells,oneofthefollowingmethodsofterminating
condensate drainage pipe should be adopted.
Internal pipework
Wherever possible, the condensate drainage pipe should be terminated at a suitable internal foul water
discharge point such as (a) an internal soil and vent stack or (b) an internal kitchen or bathroom waste pipe,
washing machine waste pipe etc. A suitable permanent connection to the foul waste pipe should be used.
Figures 9.5.1, 9.5.2(a), 9.5.2(b) show appropriate connection methods.
Thepossibilityofwastepipesfreezingdownstreamoftheconnectionpointshouldbeconsideredwhen
determining a suitable connection point - e.g. a slightly longer pipe run to an internal soil stack may be
preferable to a shorter run connecting into a kitchen waste pipe discharging directly through the wall to an
external drain.
Where “gravity discharge” to an internal termination is not physically possible (e.g. the discharge point is
above the appliance location, or access is obstructed by a doorway), or where very long internal pipe runs
would be required to reach a suitable discharge point, the following measures may be adopted.
Use of a condensate pump (to an internal termination):
Condensatecanberemovedusingaproprietarycondensatepump(thirdpartydelivery),ofaspecication
recommended by the pump manufacturer.
The pump outlet should discharge to a suitable internal foul water discharge point, such as (a) an internal soil
and vent stack or (b) an internal kitchen or bathroom waste pipe, washing machine waste pipe etc. Figure
9.5.3 shows a typical connection method.
A suitable permanent connection to the foul waste pipe should be used and the manufacturer’s detailed
installation instructions for the pump should be followed.