Ariston CLAS HE R 12 Installation And Servicing Instructions page 16

installation
Condensate Discharge
The condensate discharge hose from the boiler
must have a continuous fall of .5
inserted by at least 50mm into a suitable acid
resistant pipe - e.g. plastic waste or overflow
pipe. The condensate discharge pipe must have
a minimum diameter of mm, must have a
continuous fall and preferably be installed and
terminated to prevent freezing.
The discharge pipe must be terminated in a suitable
position:
i) Connecting into an internal soil stack (at least
450mm above the invert of the stack). A trap giving
a water seal of at least 75mm must be incorporated
into the pipe run, there also must be an air break
upstream of the trap.
ii) Connecting into the waste system of the
building such as a washing maching or sink trap.
The connection must be upstream of the washing
machine/sink. If the connection is downstream
of the waste trap then an additional trap giving a
minimum water seal of 75mm and an air break must
be incorporated in the pipe run, as above.
iii) Terminating into a gully, below the grid level
but above the water level
iv) Into a soakaway
Note: If any condensate pipework is to be installed
externally then it should be kept to a minimum and
be insulated with a waterproof insulation and have
a continuous fall. The total length of external pipe
used should not exceed 3 metres.
Some examples of the type of condensate
terminations can be found below.
1. Internal termination of codensate drainage pipe
to internal stack.
16
and must be
o
. External terminaton of condensate drainage pipe
via internal discharge branch (e.g. sink waste) and
condensate siphon.
trap
3. External termination of condensate drainage
pipe via internal discharge branch (e.g. sink waste
- proprietary fitting).
trap
4. External termination of condensate drainage pipe
via condensate siphon