Dimplex System 18 Installation And Servicing Instructions page 15

7 7 . . 0 0 S S I I T T E E R R E E Q Q U U I I R R E E M M E E N N T T S S
7 7 . . 6 6 C C O O N N D D E E N N S S A A T T E E D D R R A A I I N N
N N O O T T E E : : The appliance is fitted with a trap the depth of
which is >= 75mm, therefore no other traps are required in
the condensate run.
The condensation 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.
1. The condensate outlet will accept 21.5mm (
overflow pipe which should discharge internally into the
household drainage system, downstream of all other traps. 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.
B B S S 6 6 7 7 9 9 8 8 : : 2 2 0 0 0 0 0 0 & & P P a a r r t t H H I I o o f f t t h h e e B B u u i i l l d d i i n n g g R R e e g g u u l l a a t t i i o o n n s s g g i i v v e e
f f u u r r t t h h e e r r g g u u i i d d a a n n c c e e . .
3. Metal pipework is NOT suitable for use in condensate
discharge systems.
4. The pipe should be a minimum of 21.5mm diameter and
must be supported properly.
5. I I t t i i s s a a d d v v i i s s a a b b l l e e t t o o k k e e e e p p t t h h e e c c o o n n d d e e n n s s a a t t e e p p i i p p e e i i n n t t e e r r n n a a l l . .
6. E E x x t t e e r r n n a a l l r r u u n n s s g g r r e e a a t t e e r r t t h h a a n n 3 3 m m e e t t r r e e s s o o r r r r u u n n s s i i n n c c o o l l d d a a r r e e a a s s
s s h h o o u u l l d d u u s s e e 3 3 2 2 m m m m w w a a s s t t e e p p i i p p e e a a n n d d b b e e i i n n s s u u l l a a t t e e d d . .
7. If the boiler is fitted in an unheated location the entire
condensate discharge pipe should be treated as an external
run.
8. In all cases discharge pipe must be installed to aid disposal
of the condensate.
9. 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 terminations
(see figs. 14,15 & 16):
i) to an internal soil & vent pipe
ii) via and internal discharge branch (e.g. sink waste)
iii) to a drain or gully
iv) to a purpose made soakaway
10. In exceptional circumstances, such as when a boiler is
installed in a basement without drainage, it may be necessary
to install a condensate pump to carry condensate up to ground/
drain level. Such products are available from most plumbing
merchants. For help with selecting a condensate pump contact
Dimplex Boilers - Tel: 0844 3711121.
W W A A R R N N I I N N G G : : There must be no air breaks in the condensate
pipework or drainage system (see Fig. 17).
/ in) plastic
3
4
External termination via internal discharge branch
Sink
Pipe must terminate
above water level but
below surrounding surface.
F F i i g g . . 1 1 5 5
F F i i g g . . 1 1 7 7
Termination to an internal soil and vent pipe
2.5° Minimum fall
450mm min
e.g sink waste - downstream
T T h h e e r r e e s s h h o o u u l l d d b b e e
n n o o a a i i r r g g a a p p
N N O O T T A A L L L L O O W W E E D D
F F i i g g . . 1 1 4 4
Termination to a purpose made soak-away
Holes in the soak-away must
face away from the building
F F i i g g . . 1 1 6 6
© Dimplex Boilers 2008
500mm min
1 1 5 5