HOT AIR GENERATOR
8
GB
regulate the burner follow the instructions in the Burner Instruc-
tion Manual.
CONNECTION TO HOT AIR DUCTS
The space heater provides heat by releasing and dispersing
hot air. An air head is supplied with each unit and it can be
connected to new air ducts if the user wishes to satisfy specifi c
needs. In this case and in particular if the diameter and length
of the ducts have been changed or if the number of bends has
been modifi ed, air output may vary. Consequently it is very im-
portant to check and regulate air output when any modifi cation
is made to air heads or air ducts. In all circumstances you must
ensure that:
• The fan motor does not absorb more current than the maximum
permitted limit;
• The volume of air fl ow corresponds to the recommended level.
If the heater is equipped with centrifugal fan and if the volume of
hot air differs from preset values proceed as follows (Fig.1):
1) Remove the aspiration grill which is on fan motor side of the unit;
2) Remove the screws (2) from the motor slide.
3) Remove the belt (1);
4) Loosen the bolts (3);
5) Turn the pulley clockwise and anti-clockwise in order to in-
crease or reduce the volume of air;
6) Tighten the bolts (3);
7) Put back the aspirations grill;
8)
Repeat operations (1) -(7) until the correct volume of air
fl owhas been achieved.
DRAFT
Effi cient combustion and trouble-free working of the burner de-
pend on effi cient fl ue draft. The unit must be connected to the
chimney fl ue in accordance with current legal regulations and in
line with the following guidelines:
• The tube which carries the smoke should cover as short a di-
stance as possible and should slant upwards;
• There should be no sharp bends in the tubes and the diameter
of the tubes must never be reduced;
• Every heater must have its own chimney;
• Flue draft must at least correspond to the minimum compulsory
level in the Technical Specifi cations.
ANALYSIS OF COMBUSTION WASTE PRODUCTS
The probes which check the composition of combustion waste
products and smoke temperature must be positioned as indica-
ted in Fig.2.
When these tests have been completed the hole which was
drilled for the probe must be sealed with a material which is
resistant to high temperatures and which ensures that the tube
remains airtight.
CONNECTION TO FUEL SUPPLY AND CHANGING FROM
ONE TYPE OFGAS TO ANOTHER
To connect the burner to the fuel supply follow the instructions in
the Burner Instruction Manual.
The burner can use both methane gas and L.P.G. The gas used
to predispose the heater at factory has been declared on data
plates applied on the box and on the heater it self (methane,
G20, or L.P.G., G30, G31).
To change from methane gas to L.P.G. or vice-versa you must:
• adapt the burner following the instructions manual;
• repeat regulation of combustion while composition of combu-
stion waste products are checked.
• correct data plate on the heater writing which type of gas must
be used.
REGULATION OF COMBUSTION - I°OPERATION
After having checked the hermetic seal of line and of combu-
stion waste products line, heater may be operated for the fi rst
time.
To perform regulation of combustion correctly, combustion wa-
ste products must be analyzed using appropriate instruments:
values recommended by actual standards must be reached.
Adjustments to be carried out are described in the Burner In-
struction Manual; fi nal values of CO2 shall be correspondant to
excess air factor of 1,2 (12,5% for gas-oil, 9,7% for G20, 9,6%
for G25, 11,7% for G30 and 11,7% for G31) while CO level shall
be less than 75 ppm.
INSTRUCTIONS FOR USE
SWITCHING ON
• Set the control knob (2) in position “0”;
• Turn on the disconnecting switch on the electric switchboard;
• If the unit is operated manually turn the control knob to .The
burner starts up, the combustion chamber heats up and then
the fan starts;
• If the unit operates automatically set the room thermostat at the
desired level and turn the control knob (2) to : the heater will
now start and stop automatically.
• If the heater doesn’t start after you have completed the above
operations consult the Troubleshooting section of this manual.
TURNING OFF
Warning Never stop the heater by simply turning off the
disconnecting switch on the electric switchboard. The
electrical supply must only be disconnected when the fan
has come to a complete stop.
In manual operation turn control knob (2) to “0” or turn off control
in automatic operation.
The burner stops while the fan turns itself on and off until the
combustion chamber has completely cooled down.
1
2
3
4
200 mm
Fig. 1
Fig. 2
