INSTALLATION INSTRUCTIONS
_
CONDENSATE DRAIN
450mm min
Holes in the soak-away must
face away from the building
500mm min
External termination to a purpose made soak-away
External termination to a drain or gully
Pipe must terminate above
water level but below
surrounding surface
50mm per
metre of p
ipe run
2.5° Minim
um fall
50mm per
metre of p
ipe run
2.5° Minim
um fall
Boiler
Pipe must terminate above
water level but below
surrounding surface
50mm per
metre of p
ipe run
2.5° Minim
um fall
External termination via internal discharge
branch e.g. sink waste - downstream
Sink
2.5° Minim
um fall
50mm per
metre of p
ipe run
Termination to an internal soil and vent pipe
Boiler
Boiler
Boiler
FAILURE TO INSTALL THE CONDENSATE
DISCHARGE PIPEWORK CORRECTLY WILL
AFFECT THE RELIABLE OPERATION OF THE
BOILER The condensate discharge pipe MUST NOT
RISE at any point along its length. There MUST be a
fall of AT LEAST 2.5° (50mm per metre) along the
entire run.
I. The condensate outlet terminates in 22 mm nut and
seal for the connection of 22 mm (3/4 in) plastic
overflow pipe which should generally discharge
internally into the household drainage system. If this
is not possible, discharge into an outside drain is
acceptable.
2. Ensure the discharge of condensate complies with
any national or local regulations in force.
BS 6798:2000 & Part H I of the Building
Regulations give further guidance.
3. The discharge pipe should be run in a proprietary
drain pipe material e.g. PVC, PVC-U, ABS, PVC-C or
PP.
4. Metal pipework is NOT suitable for use in
condensate discharge systems.
5. The pipe should be a minimum of 21.5 mm
diameter and must be supported using suitably
spaced clips to prevent sagging.
6. Any pipe fitted externally must not exceed 3
metres.
7 Any condensate discharge pipework external to the
building (or in an unheated part of it e.g. garage) must
be insulated to protect against frost. It is also
recommended that the pipe diameter is increased to
32mm.
8. If the boiler is fitted in an unheated location the
entire condensate discharge pipe should be treated
as an external run.
9. In alI cases discharge pipe must be installed to aid
disposal of the condensate. T o reduce the risk of
condensate being trapped, as few bends and fittings
as possible should be used.
10. When discharging condensate into a soil stack or
waste pipe the effects of existing plumbing must be
considered. If soil pipes or waste pipes are subjected
to internal pressure fluctuations when WC's are
flushed or sinks emptied then back-pressure may
force water out of the boiler trap and cause appliance
lockout.
Examples are shown of the following methods of
termination:-
i) to an internal soil & vent pipe
ii) via an internal discharge branch (e.g. sink waste)
iii) to a drain or gully
iv) to a purpose made soakaway
CONDENSING WALL-HUNG BOILER – TG05A062.A0505
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