75
EN
a
WARNING
Use suitable tools and accident protection when re-
moving the packaging and when handling the appli-
ance. Observe the maximum weight that can be lifted
per person.
6.4
Installation room
The room where the appliance must be installed must comply
with the technical regulations and the laws in force. It must be
equipped with vents suitably sized for “TYPE B” appliances.
APPROXIMATE MINIMUM DISTANCES
≥
1,2 m
≥
1 m
≥
1 m
≥
0,6 m
≥
1
m
Fig. 31
m
WARNINGS
– Before assembling the appliance, the installer
MUST
make sure that the floor can support the weight.
– Remember to consider the space needed in order to
access the safety/adjustment devices and to carry
out maintenance interventions.
– The installation room must have an appropriate
height for the installed power, according to the local
and national legislation in force.
d
IT IS FORBIDDEN
– Install
DUETTO HE EV
appliances outdoors.
6.5
New installation or installation of a re-
placement appliance
When
DUETTO HE EV
thermal units are installed on old systems
or systems that need to be upgraded, we recommend checking
that:
– the connecting flue pipe is suitable for the combustion tem-
perature of the appliance, calculated and manufactured in
compliance with Standards, that it is as straight as possible,
air tight, isolated, with no obstructions or restriction and that
it has appropriate condensate collection and evacuation sys-
tems
– the electrical system is constructed by professionally quali-
fied personnel, respecting the specific regulations
– the fuel supply line is made in conformity to the relevant
standards
– the expansion vessel ensures total absorption of the fluid di-
lation in the system
– the pump flow-head performance is sufficient for the system
characteristics
– the system is clean, free of any sludge, deposits, de aerated
and air tight. For system cleaning, please refer to the relevant
paragraph.
– a supply/refill water treatment system is provided
– if there is an automatic filling system, a litre counter must
have been installed so as to know the total eventual losses.
m
CAUTION
The manufacturer declines all liability for any damage
caused by incorrect implementation of the system or
of the smoke outlet system or by an excessive use of
additives.
6.6
Cleaning the system
Before installing the appliance on a newly constructed system
or replacing a heat generator on an existing system, it is impor-
tant that the system is thoroughly cleaned to remove any sludge,
slag, dirt, residues, etc.
Before removing an old heat generator from an existing system,
it is recommended that the user:
– puts a descaling additive into the water system
– allows the system to work with the generator active for a few
days
– drains the dirty water from the system and flushes the system
with clean water once or more than once.
If the old generator has already been removed or is not availa-
ble, replace it with a pump to circulate water in the system and
then proceed as described above.
Once cleaning operations have been carried out and before
installing the new appliance, it is recommended that a fluid is
added to the water system to protect it from corrosion and de-
posits.
m
CAUTION
– For further information on the type of additive and
usage, please contact the appliance manufacturer.
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