Wiring Diagram; Troubleshooting - Immergas VICTRIX EXA 28 1 ERP Instruction And Recommendation Booklet

3.2 WIRING DIAGRAM.

2
Key:
B1 - Flow probe
B2 - Domestic hot water probe
B4 - External probe (optional)
B5 - Return probe
B9 - Domestic hot water inlet probe
(optional)
B10 - Flue probe
V2
CAR - Comando Amico Remoto remote
V2
control (optional)
E1 - Ignition electrodes
E2 - Detection electrode
E4 - Safety thermostat
E13 - Heat exchanger safety thermofuse
G2 - Igniter
M1 - Boiler circulator pump
M20 - Fan
Comando Amico Remoto remote control
the boiler is set-up for the application of the
Comando Amico Remoto remote control
V2
(CAR ), which must be connected to clamps
41 and 44 of the terminal board, by observing
polarity and eliminating jumper X40.
Room ON-OFF thermostat: the boiler is set-up
for the application of the Room Thermostat (S20),
which must be connected to clamps 40 and 41 of
the terminal board and by eliminating jumper X40.
The connector X5 is used for the connection to
the relay board.
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.
4
1
10
14
3
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
S20 - Room thermostat (optional)
S31 - On/Stand-by/Off Button
S33 - Info button
T2 - Boiler board transformer
X40 - Room thermostat jumper
Y1 - Gas valve
1 - 230 Vac 50 Hz power supply
2 - Status signal
3 - N.B.: the user interface is on the
welding side of the boiler board
V2
: - Repeated ignition blocks. It can be caused by
no gas, check the presence of pressure in the
V2 network and that the gas adduction cock is
open. Incorrect adjustment of the gas cock,
check the correct calibration of the gas valve.
- Irregular combustion or noisiness. It may be
caused by: a dirty burner, incorrect combustion
parameters, intake-exhaust terminal not cor-
rectly installed. Clean the above components
and ensure correct installation of the terminal,
check correct setting of the gas valve (Off-Set
setting) and correct percentage of CO
gas.
- Frequent interventions of the overheating
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.
- Drain trap clogged. This may be caused by
dirt or combustion products deposited inside.
Check, by means of the condensate drain cap,
that there are no residues of material blocking
the flow of condensate.
27
5
4 - Safety thermostat (low temperature)
connection jumper
5 - Return probe function configuration
jumper
6 - Brown
7 - Black (DHW)
8 - Blue
9 - Grey
10 - Black
11 - White
12 - Pink
13 - Red
14 - Orange
15 - Green
16 - Brown (C.H.)
- Heat exchanger clogged. This may be caused
by the drain trap being blocked. Check, by
means of the condensate drain cap, that there
are no residues of material blocking the flow of
condensate.
- Noise due to air in the system. Check opening
of the special air vent valve cap (Fig. 1-31).
Make sure the system pressure and expansion
vessel pre-charge values are within the set
limits; The factory-set pressure values of the
expansion vessel must be 1.0 bar, the value of
in flue system pressure must be between 1 and 1.2 bar.
2
- Noise due to air inside the condensation mod-
ule. Use the manual air vent valve (Fig. 1-31)
to eliminate any air present in the condensa-
tion module. When the operation has been
performed, close the manual vent valve.
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3-2