Immergas NIKE MYTHOS 24 2 E, Instruction And Warning Book

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INS
TALLER
US
ER
MAINTEN
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CE TECHNI
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AN
3.2 WIRING DIAGRAM.
Fig. 3-2
Key:
B1 - Flow probe
CAR
V2
- Comando Amico Remoto remote
control Version 2 (optional)
DS1 - Display
E3 - Ignition and
detection electrode
E4 - Safety thermostat
E6 - Flue safety thermostat
F1 - Phase fuse
F2 - Neutral fuse
M1 - Boiler circulator pump
M30 - Three-way valve
S2 - Operation selector
S3 - Block reset button
S4 - Domestic hot water flow switch
S5 - System pressure switch
S20 - Room thermostat (optional)
S21 - Domestic hot water temperature
increase button
S22 - Domestic hot water temperature
decrease button
Comando Amico Remoto
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 40 and 41, by observing
polarity and eliminating jumper X40.
Room thermostat: the boiler is set-up for the
application of the Room Thermostat (S20) which
must be connected to clamps 40 and 41 and by
eliminating jumper X40.
The connector X6 is for connection to a personal
computer.
3.3 TROUBLESHOOTING.
N.B.:
maintenance interventions must be carried
out by an authorised company (e.g. Immergas
After-Sales Technical Assistance Service).
- Smell of gas. Caused by leakage from gas circuit
pipelines. Check sealing efficiency of gas intake
circuit.
- Irregular combustion (red or yellow flame).
When the burner is dirty or the boiler lamellar
pack is blocked. Clean the burner or the boiler
lamellar pack.
- Frequent interventions of the over heating
safety 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.
- The boiler produces condensate. This can be
caused by obstructions of the chimney or flues
with height or section not proportioned to the
boiler. It can also be determined by functioning
at boiler temperatures that are excessively low.
In this case, make the boiler run at higher
temperatures.
- Frequent interventions of the flue safety
thermostat. This can be caused by obstructions
in the fumes circuit. Check the flue. The flue
may be obstructed or by height or section
not suitable for the boiler. Ventilation may be
insufficient (see room ventilation point).
- Presence of air in the system. Check opening of
the special air vent valve cap (Fig. 1-6). Make
sure the system pressure and expansion vessel
pressure values are within the set limits; the
pressure value for the expansion vessel must be
1.0 bar, and system pressure must be between
1 and 1.2 bar.
- Ignition block and Chimney block. (See par.
2.5 and 1.3 (electric connection).
S23 - Heating temperature increase
button
S24 - Heating temperature decrease
button
T1 - Low voltage power supply unit
T2 - Ignition transformer
U1 - Rectifier inside the gas valve
connector (only available on
Honeywell gas valves)
X40 - Room thermostat jumper
Y1 - Gas valve
Y2 - Gas valve modulator
1 - User interface
2 - N.B.: the user interface is on the
welding side of the boiler board
3 - Power supply 230Vac 50Hz
4 - Blue
5 - Brown
6 - Yellow/Green
7 - Black
8 - Grey
9 - White
10 - The x6 connector is used for
automatic inspection