3-2
7
12
6
7
13
7
6
8
6
8
8
8
8
9
10 11 11
9
9
9
11 11
7
6
5
1
2
4
3
10
7
10
7
6
18
IN
ST
ALLER
U
SER
MAINTE
NA
NCE TECHN
IC
IAN
3.2 WIRING DIAGRAM.
Comando Amico Remoto remote control
V2
(CAR
V2
): the boiler is set-up for the application
of the Comando Amico Remoto remote control
V2
(CAR
V2
) which must be connected to clamps
42 and 43 of the X2 connector on the P.C.B.
respecting polarity and eliminating jumper X40.
N.B.:
if a room thermostat is inserted at clamps
40 and 41 as an alternative to the CAR
V2
, the
boiler adjustments will be made on the boiler
control panel.
Connector X5 is used for the electrical connection
to the relay P.C.B.
Connector X6 (RS 232) is used for automatic
inspection for connection to the personal
computer.
3.3 TROUBLESHOOTING.
N.B.:
maintenance interventions must be carried
out by a quali ed Hunt Heating technician.
- Smell of gas. Caused by leakage from gas circuit
circuit.
-
by: incorrect electric power supply, check
respect of L and N polarity. No gas, check the
presence of pressure in the network and that the
gas intake pipe is open. Incorrect adjustment
of the gas valve, check the correct calibration
of the gas valve. Also check that the heat
exchanger or trap are not clogged.
-
caused by: a dirty burner, incorrect combustion
parameters, intake-exhaust terminal not
correctly installed. Clean the above components
and ensure correct installation of the terminal,
setting) and correct percentage of CO
2
gases.
- Frequent activation of the temperature
overload thermostat. It can depend on the lack
of water in the boiler, little water circulation
in the system or blocked pump. Check on the
manometer that the system pressure is within
established limits. Check that the radiator
valves are not closed and also the functionality
of the pump.
-
combustion products deposited inside. Check,
by means of the condensate drain cap, that
there are no residues of material blocking the
-
the trap being blocked. Check, by means of the
condensate drain cap, that there are no residues
- Noise due to air in the system. Check opening
of the hood of the special air vent valve
(Fig. 1-18). Make sure the system pressure and
expansion vessel pre-charge values are within
the expansion vessel must be 1.0 bar, the value
of system pressure must be between 1 and 1.2
bar.
3.4 CONVERTING THE BOILER TO
OTHER TYPES OF GAS.
the relative conversion kit for quick and easy
conversion.
Boiler conversion must be carried out by a
To convert to another type of gas the following
operations are required:
- remove the voltage from the appliance;
- replace the main burner injectors, making sure
to insert the special seal rings supplied in the
kit, between the gas manifold and the injectors;
- move jumper 15 (Fig. 3-4) into the correct
position for the type of gas in use (Natural Gas or
L.P.G.);
- apply voltage to the appliance;
- adjust the boiler maximum heat power;
- adjust the boiler minimum heat power;
- adjust (eventually) the heating power;
-
-
present in the conversion kit, near the data-
plate. Using an indelible marker pen, cancel
the data relative to the old type of gas.
to the type of gas used, following the indications
given in the tables of Par. 3.16.
Key:
A3 - Integrated P.C.B.
B1 - Flow probe
B2 - Domestic hot water probe
B4 - External probe (optional)
CAR
V2
- Comando Amico Remoto remote control
V2
(CAR
V2
)
(Optional)
E1 - Ignition electrodes
E2 - Detection electrode
E4 - Safety thermostat
E6 - Flue safety thermostat
F1 - Phase fuse
F2 - Neutral fuse
M1 - Boiler pump
M20 - Fan
M30 -
R5 - Domestic hot water
temperature trimmer
R6 - Central heating temperature trimmer
R10 - Main selector
S4 -
S5 - System pressure switch
S6 - Flue pressure switch
S8 - Gas type selector
T1 - Ignition transformer
X40 - Room thermostat jumper
Y1 - Gas valve
Y2 - Gas valve modulator
1 - Primary
2 - Secondary
3 - Condensate level
4 - 230Vac 50Hz power supply
5 - Yellow/Green
6 - Brown
7 - Blue
8 - Black
9 - Grey
10 - White
11 - Red
12 - Central heating
13 - Domestic hot water
MET - Natural Gas
GPL - LPG