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22
installation
Fitting the Twin Pipe (Ø80 / 80)
Note: See table for maximum and minimum ue runs.
Where it is not possible to terminate the ue within the distance
permitted for coaxial ues, the twin ue pipe can be used by tting
a special adaptor to the ue connector and using the aperture for
the air intake located on top of the combustion chamber.
Always ensure that the ue is adequately supported, using one
ue bracket per extension and avoiding low points. (ARISTON
supply suitable clamps as Part No. 705778).
To utilise the air intake it is necessary to:
1) Take the air intake cover o the top of the appliance
2) Assemble the ange on the header supplied with the boiler
3) Insert the header on the tube or the elbow up until the lower
stop (you do not have to use the washer).
4) Insert the elbow/header in the boiler air intake hole and fasten
it with screws.
The twin ue pipes can be tted with or without additional elbows
and need no clamps, simply ensure that the lip seal is inserted in
the female end of the ue pipe and push the extension piece fully
into the previous section of ue pipe or elbow, check that the lip
seal is not dislodged when assembling the ue (greasing the seal
will aid assembly).
Twin pipe can also be converted back to Coaxial ue to enable
vertical termination with a coaxial kit by using the pipe bridge
(Twin - Coaxial Adaptor - Part No. 3318089). When running the
twin ue pipe vertically.
It is not possible to terminate concentrically horizontally.
Termination is only possible with separate air and exhaust
terminals.
When siting the twin ue pipe, the air intake and exhaust terminals
must terminate on the same wall, the centres of the terminals
must be a minimum of 280 mm apart and the air intake must
not be sited above the exhaust terminal (refer to Fig. 10). The air
intake pipe can be run horizontally, however, the terminal and the
nal 1 metre of ue must be installed either horizontally or with a
slight fall away from the boiler to avoid rain ingress.
It is also strongly recommended that the air intake pipe run be
constructed of insulated pipe to prevent condense forming on
the outside of the tube.
Ensure the exhaust tube has a minimum fall back to the boiler of
1˚ / metre (1˚ = 17.5mm/metre)
The maximum permissible ue length for twin ue is dependent
on the type of run used (see table on page 24).
For further information relating to ue runs not illustrated, please
contact the Technical Department on 0870 241 8180.