Fitting The Twin Pipe - Ariston CLAS HE R 12 Installation And Servicing Instructions

Fitting the Twin Pipe (Ø80 / 80)
Note: See on page 7 for maximum and minimum
flue runs.
Where it is not possible to terminate the flue within
the distance permitted for coaxial flues, the twin
flue pipe can be used by fitting a special adaptor to
the flue connector and using the aperture for the air
intake located on top of the combustion chamber.
Always ensure that the flue is adequately supported,
using one flue bracket per extension and avoiding
low points. (MTS supply suitable clamps as Part No.
705778).
To utilise the air intake it is necessary to:
1) Take the air intake cover off the top of the ap-
pliance;
) Assemble the flange 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 flue pipes can be fitted with or without ad-
ditional elbows and need no clamps, simply ensure
that the black o-ring is inserted in the female end of
the flue pipe and push the extension piece fully into
the previous section of flue pipe or elbow, check
that the o-ring is not dislodged when assembling
the flue (greasing the seal will aid assembly).
Twin pipe can also be converted back to coaxial flue
to enable vertical termination with a coaxial kit by
using the pipe bridge (Twin - Coaxial Adaptor - Part
No. 3318089). When running the twin flue pipe
vertically.
It is not possible to terminate concentrically hori-
zontally. Termination is only possible with separate
air and exhaust terminals.
When siting the twin flue pipe, the air intake and
exhaust terminals must terminate on the same wall,
the centres of the terminals must be a minimum of
80 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 final 1 metre of flue 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.
The maximum permissible flue length for twin flue
is dependent on the type of run used (see table on
page 8).
For further information relating to flue runs not
illustrated, please contact the Technical Department
on 0870 41 8180.
installation
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