Immergas MAIOR EOLO 24, Инструкция и рекомендации

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INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
3.2 WIRING DIAGRAM.
Key:
B1 - Flow probe
B2 - Domestic hot water probe
B4 - External probe (optional)
B9 - Domestic hot water inlet probe (optional)
CAR
V2
- Comando Amico Remoto remote control
V2
(optional)
DS1 - Display
E3 - Ignition and detection electrode
E4 - Safety thermostat
F1 - Phase fuse
M1 - Boiler circulator pump
M20 - Fan
M30 - Three-way valve
R5 - Domestic hot water temperature
trimmer
R6 - Central heating temperature
trimmer
S2 - Operation selector
S3 - Block reset button
S4 - Domestic hot water flow switch
S5 - System pressure switch
S6 - Flue pressure switch
S20 - Room thermostat (optional)
S31 - On/Stand-by/Off Button
S32 - Boost button
T1 - Ignition transformer
T2 - Boiler board 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 - N.B.: the user interface is on the weld-
ing side of the boiler board
2 - Zones control unit (optional)
3 - 230 Vac 50 Hz power supply
4 - Anti-freeze kit (optional)
5 - Blue
6 - Brown
7 - Black
8 - Orange
9 - Red
10 - White
11 - Grey
12 - Green
13 - Domestic hot water
14 - Central heating
15 - Yellow/green
Remote control: the boiler is set-up for the ap-
plication of the Comando Amico Remoto remote
control
V2
(CAR
V2
) which must be connected to
clamps 41 and 44 of connector X15 on the P.C.B.,
observing polarity and eliminating jumper X40.
Room thermostat: the boiler is designed for the
application of the Room Thermostat (S20). Con-
nect it to clamps 40 – 41 eliminating jumper X40.
The connector X5 is used for the connection to
the relay board.
The connector X6 is for connection to a personal
computer.
The connector X8 is used for software updating
operations.
3.3 TROUBLESHOOTING.
N.B.:
maintenance operations must be carried
out by an authorised company (e.g. Authorised
After-Sales Technical Assistance Service).
- Smell of gas. Caused by leakage from gas circuit
pipelines. Check sealing efficiency of gas intake
circuit.
- The fan works but ignition discharge does not
take place on the burner ramp. The fan may
start but the safety air pressure switch does not
switch the contact over. Make sure:
1) that the intake-exhaust duct is not too long
(over allowed length).
2) that the intake-exhaust duct is not partially
blocked (on the exhaust or intake side).
3) the diaphragm on the fumes exhaust is ade-
quate for the length of the intake/exhaust
ducts.
4) that the sealed chamber is sealed perfectly.
5) the fan power supply voltage is not less than
196 V.
- Irregular combustion (red or yellow flame).
Can be caused by: dirty burner, clogged lamel-
lar pack, intake - exhaust terminal not installed
properly. Clean the above components and
ensure correct installation of the terminal.
- Frequent interventions of the over heating
safety thermostat. It can depend on reduced
water pressure in the boiler, little circulation
in the heating system, the blocked pump or an
anomaly of the boiler P.C.B. Check on the pres-
sure gauge that the system pressure is within
established limits. Check that radiator valves
are not all closed.
- The boiler produces condensate. It can be de-
termined by functioning at boiler temperatures
that are excessively low. In this case, make the
boiler run at higher temperatures.
- Presence of air in the system. Check opening of
the special air vent valve cap (Fig. 1-29). Make
sure the system pressure and expansion vessel
factory-set pressure values are within the set
limits; the factory-set value for the expansion
vessel must be 1.0 bar, and system pressure
between 1 and 1.2 bar.
- Ignition block see par. 2.5 and 1.6 (electric
connection).
STD.002998/004