User guide

19
10.1 Flue Length
The maximum permissible horizontal ue length is 10 metres
plus the ue terminal assembly, this can be achieved by use
of the accessories, see diagram 10.3.
However should an additional 90
o
or 2 x 45
o
elbows be used
then the length MUST be reduced by 1metre.
The diagram 10.1 shows the length achievable by using the
kit A2043600.
When extension pipes are used the ue system must be
designed to have a continuous fall to the boiler of at least 2.5
o
44mm/metre to allow condensate to run back into the boiler
and out via the condensate drain.
The ue can be installed from inside the building, when
access to the outside wall face is not practicable.
10 Telescopic Flue - Length, Preparation and Installation
Horizontal Telescopic Flue - Rear
Diagram 10.1
13558
13559
Ultracom
18sxi
Ultracom
30sxi
Exhaust mass rate (g/s)
At Min Thermal
Load (40C°/30°C)
2.30 2.45
At Max Thermal
Load (80C°/60°C)
8.75 13.25
Exhaust temperature (ºC)
At Min Thermal
Load (40C°/30°C)
56.0 44.0
At Max Thermal
Load (80C°/60°C)
69.0 57.0
Horizontal Telescopic Flue - Side
Multiple Boiler Chimney Flue Length
The ue length must be calculated and installed according to
the relevant standards EN 13384-1 and 2 (C43 flue systems
only) with reference to the table below and the manufacturers
instructions supplied.
The appliance maximum ue length must be included when
calculating the overall design of the ue system.