Glow-worm 38cxi - Terminal Position; Installation Details

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10 Twin Flue - Length, Preparation and Installation
10.12 Twin ue
The twin ue system is available as an option when the top
horizontal or vertical ue system is not appropriate.
The system can provide an independent horizontal air inlet
and ue outlet, horizontal air inlet and vertical ue outlet or
vertical air inlet and ue outlet via a concentric terminal.
The system is made up from accessories, see diagram 10.26.
NOTE: The air and ue outlets do not have to be equal
lengths. 2x45° bends can replace 1x90° bend if necessary.
The maximum permitted combined (air inlet + ue outlet) ue
length is 40 metres plus terminal assemblies. For each 90° or
45° x 2 bends tted, the maximum ue length must be reduced
by 1 metre, see diagram 10.25.
NOTE: When using 90° bends any horizontal run should be
inclined by a minimum of 44mm/metre (2.5°) towards the
boiler to facilitate condense removal.
Alternatively use 45° bends to avoid horizontal runs in the ue
pipe.
Multiple Boiler Chimney Flue Length
The ue length must be calculated and installed according to
the relevant standards EN 13384-1 and 2 (C43 ue 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.
Terminal Position
The clearances for a ue outlet are given in the "Flue Location
and Ventilation" section.
In addition the horizontal air inlet must not be closer than 300
mm from a ue outlet on the same wall or 1200mm from an
opposing ue outlet.
Installation Details
The parts available for a twin ue system installation are
shown in diagram 10.26.
Diagram 10.26
14869
MODEL 24cxi 30cxi 38cxi
Exhaust mass rate (g/s)
At Min Thermal
Load (40C°/30°C)
2.30 2.36 3.20
At Max Thermal
Load (80C°/60°C)
11.30 14.20 18.55
Exhaust temperature (ºC)
At Min Thermal
Load (40C°/30°C)
56.0 63.0 46.0
At Max Thermal
Load (80C°/60°C)
76.0 75.0 73.0