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If the machine is left without power for long periods in
areas where temperatures may fall below 0°C, and you
do not want to drain the heating system, you are advised
to add a good quality anti-freeze liquid to the primary
circuit to protect the machine from any risk of freezing
Carefully follow the manufacturer's instructions with re-
gards not only the percentage of anti-freeze liquid to be
used for the minimum temperature at which you want
to keep the machine circuit, but also the duration and
disposal of the liquid itself.
The boiler components are made of materials resistant
to antifreeze liquids containing ethylene glycol.
MINIMUM CLEARANCES
Access the inside of the boiler for routine maintenance
tasks, respecting the minimum installation clearances.
When positioning the appliance, bear in mind that:
− it must be installed on a wall that can support its
weight
− it must not be positioned above a cooker or any other
cooking device
− it is forbidden to leave inflammable products in the
room where the boiler is installed
− heat-sensitive walls (e.g. wooden walls) must be
protected with good insulation.
2.4
Minimum clearance areas recommended
Clearances for the assembly and maintenance of the ap-
pliance are shown in the figure.
72
300
9
When installing Condexa HPR 35-45 models, it is
ESSENTIAL to consider the clearance required for the
use of the combustion analysis tool. The drawing
above shows a situation where the distances be-
tween the boiler and wall unit /recess were defined
by taking into consideration an instrument with a
length of 300 mm. Longer instruments require more
space.
2.5
Instructions for the condensate discharge
connection
This appliance is designed to prevent the leakage of
gasseous combustion products via the condensate dis-
charge pipe, thanks to a special drain-trap located in-
side it.
All the components of the condensate drainage system
must be correctly serviced as per the manufacturer's in-
dications, and must not be modified in any way.
The condensate drain outlet system downstream from
the appliance must be made in accordance with the
relevant legislation and regulations in force; this is the
responsibility of the installer. The system must be sized
and installed so as to ensure the correct evacuation of
the condensate produced by the appliance and/or col-
lected by the flue gas evacuation systems. All the sys-
tem components must be made to the highest stand-
ards, using materials able to withstand the long-term
mechanical, thermal and chemical stress created by the
condensate.
Note: if the condensate drain outlet system is exposed to
the risk of freezing temperatures, always ensure a suit-
able level of pipe insulation and consider increasing the
diameter of the pipe itself.
The pipe must slope sufficiently to prevent the con-
densate from stagnating and guarantee it is correctly
drained off. There must be an examinable disconnection
between the condensate drain outlet pipe of the appli-
ance and the condensate drain outlet system.
2.6
Condensate neutralisation
Standard UNI 11528 makes condensate neutralisation
compulsory for systems with a total output of over 200
kW. For systems with an output between 35 and 200 kW,
neutralisation may or may not be compulsory depending
on the number of flats (for residential applications) or
the number of occupants (for non-residential applica-
tions) served by the system.
21
INSTALLATION
357
200
measurements in mm
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