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Min. radius 100mm
Gravity Drain
min. fall 3°
Max. Head
2.5 metres
(as measured
from the
case outlet)
10mm Outlet
Note: The point of discharge from the
pumped length of condensate pipe
(point 'A') must be 150mm above the
base level of the boiler, whether
discharging direct into a drain or into
an additional gravity drain.
18
© Baxi Heating UK Ltd 2010
Supplied By www.heating spares.co Tel. 0161 620 6677
Point 'A'
Max. Head
3 metres
(as measured
from the
pump outlet)
Boiler
Fig. 12
5.0 Site Requirements
5.9
Condensate Drain - General
Failure to install the condensate discharge pipework
correctly will affect the reliable operation of the boiler.
1. Ensure the discharge of condensate complies with any
national or local regulations in force.
BS 6798 & Part H1 of the Building Regulations give further
guidance.
2. If any further drain pipe is required (additional to that supplied
with the boiler), it should be run in a proprietary material
e.g. PVC, PVC-U, ABS, PVC-C or PP. John Guest 'Speedfit'
components are recommended.
3. Metal pipework is NOT suitable for use in condensate
discharge systems.
4. Any pipe fitted externally must be kept as short as possible to
minimise the potential of freezing and must be insulated using
waterproof material.
5. When discharging condensate into a soil stack or waste pipe
the effects of existing plumbing must be considered.
5.10
Condensate Disposal (Fig. 12)
1. This boiler incorporates an automatic pumped condensate
system. The pump is submerged in a sump assembly and is
activated by the discharge float switch. A second (safety) float
switch is fitted.
2. The pump has an effective head of 3 metres. The condensate
case outlet connection is positioned at the top left of the boiler
(approximately 0.5 metres above the pump). It is 10mm
diameter plastic.
3. 3.5 metres of flexible 10mm condensate discharge pipe and a
10mm push fit elbow are supplied with the boiler.
4. The 10mm pipe can be routed to a maximum of 2.5 metres
vertically as measured from the outlet (equivalent to the total
available head of 3 metres) and then discharge via gravity or be
routed horizontally.
5. A combination of vertical and horizontal runs is permissible,
but it is recommended that the total length of horizontal runs is
kept to a maximum of approximately 1 metre. This does not
affect the maximum permitted vertical dimension.
6. The pipe must be adequately supported, either using suitably
spaced clips or run within larger diameter pipe. When using clips
take care not to deform the pipe.
7. When routing the pipe through a wall it must be suitably
sleeved. Also the pipe must not be exposed to sources of heat,
and should be protected in locations where it may be damaged.
8. The pipe should be routed so that any sharp bends, dips and
loops are avoided. A minimum radius of 100mm is
recommended for any bends. No slope is necessary and air
breaks are not required on the pumped part of the run.
9. Any part of the condensate drain system that is outside the
dwelling, or in an unheated part of it must be at least 21.5mm
diameter and suitably insulated.
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