Secondary Return Design; Condensate Removal - Potterton iHE 100 Installation & Servicing Instructions Manual

2.6 SECONDARY RETURN DESIGN

2.7 CONDENSATE DISPOSAL
Condensation is formed in the normal operation
of the appliance and this must be continuously
discharged into a drain. Given the acidity level of
condense discharge (pH 3.5 - 4.5) only plastic mate-
rial can be used for the discharge pipe work.
40mm pipe with a drop of at least 30 mm for every
metre of pipework should be used. A trap is sup-
plied which should be connected into a drain via a
tundish or air break.
External pipework and that passing through a wall
to the outside should be run in a minimum of 40mm
Soil / Vent Stack
There is no requirement for an additional trap or air
break when connecting drain pipework to an internal or
external soil or vent stack
iHE
CONDENSATE DISPOSAL EXAMPLES
Fig 2.6
11
Fig 2.5
diameter. External pipework should be insulated to
protect against frost and freezing temperatures.
The condensate trap must be fi lled with
water before operating the appliance.
It is important that the condensate fl ow
must be maintained, even in freezing
conditions. In the event that the condensate
becomes blocked, the appliance will
shutdown completely, and will not operate
again until the fl ow has been restored.
Gully
There is no requirement for an additional trap
if discharging direct into an open gully.
GB/IE