20
For the Installer
1
2.7 Installing the thermal process safeguard
a) The thermal process safeguard and cleaning T-piece must still be accessible after installation.
b) The drain must be visible in order to check the function, therefore use a discharge funnel.
Fig. 40
Thermal safety device connection
8
7
6
4
3
2
1
5
Minimum connection pressure of the ther-
m
a
l
safety device: 2 bar.
It must not be possible to block the connec-
tion manually.
1 Pressure reducing valve (only with CW connec-
tion
of more than 6 bar)
2 Dirt trap
3 Thermal process safeguard
(opens at approx. 95 °C)
4 Cleaning T-piece
5 Discharge funnel
6 Immersion sleeve for the sensor of the
thermal process safeguard
7 Boiler return
8 Boiler feed
Connection
according to EN 303-5:
2.6 Installing the exhaust pipe
a) Install the exhaust pipe upward to the flue (45° is the ideal angle). Maximum exhaust pipe length to flue 3 m.
b) Avoid 90° bends, 45° bends are better
c) Do not push the exhaust pipe too far into the flue.
d)
Do not seal
the exhaust
pipe completely into the flue
. Connection with flexible exhaust pipe inlet into the
flue. The vacuum fan can cause sound transmissions that create noise pollution.
e)
The entire exhaust line
should be
sealed
(incl. cleaning aperture) because there can be positive pressure in
the exhaust pipe for a short period during the starting phase.
f)
Insulate the exhaust pipe with at least 30 mm insulation!
c) A draught limiter is needed if the maximum draught (see technical data in section 4.4.) is exceeded during
operation.
Note: We would recommend fitting outside the flue around ½ m below where the exhaust pipe intersects
with the flue.
Any section of this exhaust line that only rises slightly (up to 30°) or is horizontal is not allowed to
be more than 1 m in length.
