Technical data

1110
Condensate termination and route
The condensate connection on the Worcester appliances is in 22mm
plastic. The pipe should be extended and run away from the appliance
with a constant fall of 2.5 degrees or 50mm in every metre.
The condensate pipe can terminate into any one of five areas:
Cabinet dimensions
A 750mm*
B 440mm
C 360mm
A
B
C
*760mm to top of casing front.
Pipe work connections
A CH Flow 22mm
B CH Return 22mm
C Gas Inlet 22mm
D Mains Water Inlet 15mm
E DHW Outlet 15mm
A
E
C
D
B
External condensate pipe work
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 pipe work 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 pipe work length should be kept to a minimum and the route
as vertical as possible

Where pipe work could be subjected to extreme cold or wind chill,
a weather proof insulation should be used. Alternatively, the
condensate pipe work could be increased to a minimum
32mm without the requirement to insulate
Pipe work connections and casing
dimensions
Boiler location & clearances
Bathrooms
The boiler can be installed in zones 2 or 3. If a mechanical or RF
mechanical timer or text display with room thermostat (IP 20 only) is
fitted the boiler can only be installed in zone 3.
A non mechanical timer can be installed in zone 2.
See IEE wiring regulations. (See Technical Data for IP ratings).
IMPORTANT: any switch or appliance control using mains
electricity must not be able to be touched by a person using the bath
or shower.
Electrical switches, fused spur and socket outlets must not be
situated in the bathroom.
All pipe work to the appliance must be cross bonded.
600mm
2250mm
600mm
750mm
600mm
2250mm
600mm radius
750mm
3 3
2 2
1 1
1 1
2
3
Flue terminal positioning
General position
1. The terminal must not cause an obstruction nor the discharge a
nuisance. Particular care should be exercised with regards to the
pluming of the flue gases and any increase in noise levels.
2. If a terminal is fitted less than 2 metres above a surface to which
people have access, then a guard must be fitted. A terminal
protective guard is available from Tower Flue Components, Vale
Rise, Tonbridge. Tel No. [phone]. The terminal guard must
be securely fixed to the wall using suitable plugs and corrosion
resistance screws. The guard must be symmetrically positioned
about the terminal assembly and spaced such that there is a gap
of 50mm between the end of the terminal and the guard.
3. In certain weather conditions, a white plume of condensation will
be emitted from the flue terminal and siting where this could be
a nuisance, i.e. near security lighting, should be avoided.
4. The air inlet/outlet duct and the terminal of the boiler must not
be closer than 25mm to any combustible material. Detailed
recommendations on protection of combustible materials are
given in BS 5440:1.
Internal sink/washing
machine drain
A - Condensate from boiler syphon/trap
B - Sink with integral overflow
C - 21.5mmØ plastic condensate pipe
D - External drain or gully
E - Internal soil and vent stack
F - Serviceable condensate trap (75mm min.)
G - 300mm x 100mmØ 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)
Whilst all of the above methods are acceptable it is always the best
practice 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 35mm.
The flue system must be installed and terminated in accordance with
the recommendations of BS 5440:Part 1.
RSF horizontal and vertical
Minimum dimensions of flue terminal positions for
balanced room sealed flues with fanned draught:
R
Q
Q
Key to illustration
1
In addition, the terminal should not be nearer than 150 mm (fanned draught) to an opening in the
building fabric formed for the purpose of accommodating a built-in element such as a window frame.
2
Not recommended.
* See instructions supplied with vertical flue kits.
** Care should be taken to ensure terminal siting does not cause a nuisance to adjacent properties.
Terminal Position Min Distance
A
1
Directly below an opening, air brick, opening windows etc. 300mm
B
1
Above an opening, air brick, opening window etc. 300mm
C
1
Horizontally to an opening, air brick, opening window etc. 300mm
D Below gutters, soil pipes or drain pipes 75mm
E Below eaves 200mm
F
2
Below balconies or car port roof (lowest point) 200mm
G From a vertical drain pipe or soil pipe 150mm
H From an internal or external corner or to a boundary
alongside the terminal
300mm**
I Above ground, roof or balcony 300mm
J From a surface or boundary facing the terminal 600mm**
K From a terminal facing the terminal 1,200mm
L
2
From an opening in the car port
1,200mm
(e.g. door, window) into the dwelling
M Vertically from a terminal on the same wall 1,500mm
N Horizontally from a terminal on the same wall 300mm
O From a non-combustible vertical structure on the roof *
P Above intersection with the roof *
Q Adjacent to windows or openings on pitched and flat roofs 600mm
R Below windows or openings on pitched roofs 2,000mm
BBT180 Gstar CDi T&S Iss B 4/5/06 12:50 Page 10