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b
It is advisable to connect up the various metal parts
to a good earthing system.
b
The systems must always be separated if oxygen is
either continuously or occasionally introduced into
the installations (e.g. floor heating without pipes in
synthetic material resistant to diffusion, open vessel
systems, frequent topping up).
From what we have seen it is therefore important to avoid two
factors possibly leading to the above mentioned processes
i.e. contact between air and water in the installation and
regular topping up with fresh water.
To eliminate contact between air and water (and to prevent
the latter from becoming oxidized), it is necessary:
- for the expansion system to be a closed vessel type,
correctly scaled and with the correct pre-loading
pressure (to be regularly checked);
- for the installation to always be at a higher pressure
than that of the atmosphere at any point (comprising
the pump suction side) and under all running
conditions (all the water sealing and couplings in the
installation are designed to resist pressure towards
outside, but not for depression);
- that the installation will not be made with materials
permeable to gas (e.g. plastic pipes for floor systems
without anti-oxygen barrier).
a
Please contact the
B
for flushing out the water circuit inside the exchanger.
Do not use incompatible liquid detergents, including
acids (e.g. hydrochloric acid and similar acids) at
any whatsoever concentration.
b
Lastly we would remind you that the warranty does
not cover breakdowns incurred by the boiler due to
deposits and corrosion.
4 .8 Positioning and preparation for
installation
When positioning the appliance in the heating system,
account for the fact that water, gas and condensate
drainage connections must be made on the right-hand
side of the cupboard; adequate room must therefore be
left at the sides of the appliance for the space taken up by
parts of the external systems and for mounting the latter, as
shown in Figure 8.
Technical Assistance Centre
Figure 8
4 .9 Condensate outlet
The condensate water produced by Power Plus Box 1001
a normal running conditions is evacuated into a special
manifold.
Drainage must be done at atmospheric pressure, i.e. by
dripping into a connected drain-trap, as follows:
- install a drip at the condensate drainage manifold;
- connect the drip to the sewerage mains by a drain-
trap;
- be ready to use a neutralizer where required (see
project cig E.01.08.929.0; ATV A 115).
There is generally no need to take any special precautions
for draining condensate.
We advise using plastic (PP) piping for building the
condensate drainage.
a
DO NOT for any reason use pipes in copper or in any
other material not specifically used for this particular
scope, as the condensing action could cause rapid
degradation.
i ≥ 3°
i
(*)
minimum
distance
10 mm
(*) Fill the siphons with water.
Furthermore, should the vertical part of the flue exhaust
duct have to be prolonged by more than 4 metres the
condensate drain-trap will have to be placed at the foot of
the piping. The working height of the drain-trap must be at
least 30 cm. The drain-trap outlet must then be connected
up to the sewerage mains.
b
The condensate drain must be connected to the
sewerage mains in such way as to prevent it from
being frozen under any circumstances.
b
Always install a condensate drain in the exhaust flue
duct at no more than 1 m from the boiler
(*)
minimum
distance
300 mm
i > 3%
Civil drain
Condensate collector
(at atmospheric pressure)
Fig. 9
11
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