page 11
LEGEND OF THE COMPONENTS
WR version for ceiling installation
1 Bottom panel
2 Angular panel
3 Left panel
4 Air filter
5 Filter attachment knob
6 Casing crossbar
7 Adjustable grille blades
8 Right support for blades
9 Left support for blades
10 Rubber gasket for blades
11 Grille left support
12 Grille right support
13 Middle support for blades
14 Fan injector
15 Fan scroll
16 Fan support
17 Fan motor cradle
18 Fan motor
19 Fan motor attachment U-bolt
20 Centrifugal fan
21 Fan motor capacitor
22 Remote-control panel
23 Door to the controls (not used)
24 Pressure switch tubes
25 Burner control device
26 Printed electric circuit
27 Electrical board support
28 Pressure switch
29 RFI filter
30 Exchanger left support
31 Fan left support
32 Exchanger right support
33 Fan right support
34 Heat exchanger
35 Exchanger gaskets
36 Exchanger insulating gasket
37 Fan thermostat
38 Turbulator
39 Flue gas expeller gasket
40 Flue gas expeller
41 Combustion chamber door
42 Door gasket
43 Combustion chamber
44 Burner
45 Burner bracket
46 Exchanger/combustion chamber gasket
47 Back plate/combustion chamber gasket
48 Electrodes
49 Gas injector
50 Intake gasket
51 Inner intake connector
52 Inner intake duct
53 Inner exhaust flue
54 Gas supply pipe
55 Gas pipe gasket
56 Gas solenoid valve
57 Attachment plate
58 Bushings
59 Back plate
60 Safety thermostat protection
61 Safety thermostat
62 Safety thermostat electric terminal board
63 Clamps for holding the ducts
64 Terminals
65 Exhaust flue
66 Intake duct
67 Valve rectifier bridge
page 26
5. COMMISSIONING
WARNING! The commissioning of the
appliance must be performed by skilled
technical personnel.
5.1 TESTS
5.1.1 Before starting the air heater, make sure
that all the current provisions and standards
relevant to the installation of these appliances
have been observed. Pay particular attention to
the correct positioning of the combustion product
exhaust terminal.
5.1.2 Make sure that the single-phase, 230 V ~
50 Hz electric power supply and the earth wire
are connected to the special air heater terminals.
The phase conductor must be connected to the
terminal marked with the letter “L”, otherwise the
control equipment will generate a safety lockout.
5.1.3 Check that the burner is designed for the
type of gas to be used (table on page 7).
WARNING! The appliance is delivered already
set in the factory to use natural gas G20, with
a supply pressure of 20 mbar. Instead, if gas
from the third group is used (LPG), first carry
out the operations described in point 6.1.
5.1.4 Check that the gas on-off valves on the
meter and on the air heater are open. Make sure
that the air inside the gas supply piping has been
purged.
5.2 IGNITION
5.2.1 Ignition procedure
(Refer to figure 22 when reading the following
section )
a) Turn the room thermostat knob (E) clockwise
to the maximum value.
b) Turn switch (A) upwards to the “ON” position
to start the ignition cycle. Make sure that the red
LED of the “Reset” button (B) is unlit.
If it is lit, this means that the burner’s control
equipment is in a lockout state. In this case press
the button to reset the control equipment. The
red LED will turn off and from this moment the air
heater startup cycle will begin.
From the moment at which the burner is ignited,
the flame must be detected by the special
ionisation sensor within a specific safety time,
otherwise the control equipment enters the lock
out mode, indicated when the red light on the
button turns on (B).
This may occur in particular in a new appliance
due to air in the gas piping. In this case, wait
about one minute and reset the appliance by
pressing the “reset” button (D) to begin a new
cycle. Repeat the operation until the residual air
has been purged and the ignition is regular.
The exchanger heating phase will begin after
the burner has been ignited (this is indicated by
the green LED (C)). The exchanger will reach
the rated operating temperature after
approximately three minutes. At this point a
thermostat will start the fan for distributing warm
air in the room.
When the room reaches the desired temperatu-
re, adjust the room thermometer by slowly turning
its knob counterclockwise until the burner turns
off (this is indicated by the green LED C). At this
point the air heater will function completely
automatically and will keep the room at the
desired temperature.
5.2.2 Controls
WARNING! When operations or visual
inspections are performed on the air heater,
be extremely cautious and work under safe
conditions.
Insert the water column pressure gauge tube
into the pressure outlet on the gas unit (fig. 23)
after having backed off the set screw a few turns.
Start the air heater and check that the pressure
at the burner corresponds to what is indicated in
the technical data table.
If the pressure of the gas delivered to the burner
does not correspond to the value indicated, use
the special pressure set screw (fig. 23), after
having removed the protection plug, to obtain
the specified value. Turn it counterclockwise to
Fig. 22
E
D
F
A B C
CONTROL PANEL
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