page 18
adjustment screw on its front for calibrating it; this
operation is performed at the factory according to
the unit model and then the screw is sealed (fig.
9).
2.4 FAN THERMOSTAT
This thermostat controls fan operation, making it
start when the exchanger has reached the rated
operating temperature and stopping it when the
exchanger has adequately cooled. The thermostat
is attached to a threaded support, located on the
exchanger (fig. 10).
2.5 SAFETY THERMOSTAT
The thermostat is designed to interrupt burner
operation when the air temperature in the air
heater reaches a set value, i.e. when the
exchanger overheats due to insufficient air flow
or a fan malfunction. The thermostat enclosure
uses a special support to attach to the front
shield of the appliance (fig. 11).
Fig. 11
Thermostat
SAFETY THERMOSTAT
Electrical
connection
page 19
SECTION 2 - TECHNICAL INFORMATION FOR THE INSTALLER
3. IMPORTANT INFORMATION
3.1 QUALIFICATIONS OF THE INSTALLER
IMPORTANT! Current laws require that these
units be installed by specialized personnel in
possession of the proper technical and
professional qualifications. The installer is
required to issue a compliance certificate to
the user which certifies that the system was
installed correctly in compliance with current
regulations.
3.2 RELATED DOCUMENTS
Notwithstanding their limited scope, the
appliances should be installed in accordance
with the relevant provisions of the following
regulations:
UNITED KINGDOM
Gas Safety (Installation and Use) Regulations
1984 and BS 6891: 1988. Due account should
be taken of any obligations arising from the
Health and Safety at Work etc Act 1974, the
current Building Regulations, the current I.E.E.
Regulations and other relevant codes of practice.
IRELAND
I.S.3212: 1987, ICP 4, I.S.327. Due account
should be taken of any obligations arising from
the current Building Regulations, the current
I.E.E. Regulations and other relevant codes of
practice.
3.3 TRANSPORT AND HANDLING
The air heater is supplied with standard cardboard
packing with two polystyrene foam shells. The
packed appliance can be handled by hand or
with a fork-lift truck, making sure to observe the
instructions reported on the box indicated by the
special graphic symbols.
When delivered, check that no visible damage
on the packing and/or on the appliance has
occurred during transport. If damage is noted,
immediately submit a claim to the shipping agent.
Do not damage the paper installation template
when removing the air heater from the
packing. You will need to use it to make the
holes in the room’s wall.
Check that the packing includes the appliance
but also all the parts indicated in point 1.5. Place
the material and the documents in a protected
area.
3.4 DATA CHECK
Check that the heater and its technical
characteristics match what is indicated by the
drawings or other documents.
The type of gas for which the heater has been
designed and the supply pressure are found
on the exterior of the packing and on a
special label located on the inside of the
appliance.
WARNING! If the type gas for which the
appliance has been designed is different
from the one being used, the conversion
operation must be carried out by skilled
technical personnel.
3.5 USING THE INSTRUCTIONS
WARNING! When installing or working on
the appliance, comply with all the instructions
given in this manual. Changes to any type of
connection and non-compliance with these
instructions will immediately invalidate the
warranty and release the manufacturer from
all responsibilities.
4. INSTALLATION
4.1 POSITIONING INSTRUCTIONS
Before carrying out any installation operations,
make sure that the following conditions are
satisfied regarding the position where the air
heater will be installed:
a) it must be possible to provide a gas supply to
the selected point as well as a single-phase
230 Volts ~ 50 Hz power supply line.
b) It must be possible to make the connections
to the combustion air supply duct and
combustion product exhaust flue within the
specified limits.
c) The combustion product exhaust terminal’s
position outside must be in compliance with
current regulations.
d) The unit’s installation position must allow
access to the parts of the unit subject to
maintenance. It is advisable to respect the
distances indicated in figure 12.
e) For direct air delivery (W and WR):
The selected position for the unit must be
suitable to correctly distribute the air in the
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