Technical data

1514
Compartment installation
The appliance may be installed in any room, although
particular attention is drawn to the requirements of the IEE
regulations applicable and in Scotland the electrical
provisions with respect to installation in a room containing
a bath or shower.
•
The room in which the appliance is installed does not
require a purpose provided air vent.
•
If the appliance is installed in a cupboard or compartment
with dimensions that allow the minimum clearances
shown in the siting of appliance section above, then no
ventilation is required.
Wall preparation
The drawing shows the new CDi wall mounting jig which
enables a simple and straightforward method of attaching
the boiler to the wall surface. The new wall mounting
jig has additional optional fixing points and provides
improved engagement.
After fixing the jig to the wall, the appliance can be lifted
onto the jig and the union connections tightened. The
pipework can be routed behind the boiler without the
need for an additional wall spacing frame.
Condensate disposal
All condensing boilers generate condensate discharge
which needs to be piped away from the appliance via a
plastic pipe.
The amount of condensate generated depends on the
efficiency and operating status of the appliance. This can
be up to 2 litres of condensate water an hour.
Condensate termination and route
The condensate connection on Worcester appliances is in
22mm plastic. The pipe should be extended and directed
away from the appliance with a constant minimum fall of
3 degrees or 50mm in every metre.
The condensate pipe can terminate into any one of five areas:
Whilst all of the above methods are acceptable it is always
the best practise to terminate the condensate pipe via an
internal waste system. This will eliminate the need for any
external condensate pipe runs which can be susceptible to
freezing in extreme weather. Best practise is not to run
external condensate pipe any further than 3m. If it is
necessary to run more than 3m externally increase pipe size
to 32mm.
Internal sink/
washing machine drain
A Condensate from boiler syphon/trap
B Sink with integral overflow
C 22mm dia plastic condensate pipe
D External drain or gully
E Internal soil and vent stack
F Serviceable condensate trap
(75mm min.)
G 300mm x 100mm dia sealed
plastic tube
H Ground level
J Drainage holes 50mm facing away
from building
K Limestone chippings
L Weather resistant insulation
Internal waste drainage system
Soil and vent stack
External drainage system
External condensate absorption point
(unsuitable for clay soil types)
External condensate pipework
All Worcester condensing boilers have within a syphonic
condensate trap. Rather than the condensate constantly
dripping into the discharge pipe, the condensate is
collected into a trap which releases it in 100ml quantities.
This will help prevent freezing occurring.
Wherever possible the condensate discharge pipework
should be routed and terminated internally. Should this not
be possible, and the only available route is external, the
following conditions should be observed:
•
The pipework length should be kept to a minimum and
the route as vertical as possible
•
Where pipework could be subjected to extreme cold or
wind chill, a weather proof insulation should be used.
Alternatively, the condensate pipework could be
increased to a minimum 32mm without the requirement
to insulate.
Pipework connections and casing dimensions
A
C
*760mm to top of casing front.
ACB
Cabinet dimensions (mm)
A 750*
B 440
C 360
B
Pipework connections
A Flow 22mm
B Gas inlet 22mm
C Return 22mm
Greenstar CDi Conventional
ACB
Pipework connections
A Flow 22mm
B Gas inlet 22mm
C Return 22mm
Greenstar CDi System
BBT1253 G_CDi Rg+Sys TS c08_07 25/6/07 09:21 Page 14