Immergas ZEUS 24 Superior, Instruction Booklet And Warning

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INS
TALL
AT
O
R
US
ER
MAINTEN
AN
CE
3.2 WIRING DIAGRAM.
Key:
A5 - CAR
V2
interface card
B1 - Delivery probe
B2 - Domestic water probe
B4 - External probe (optional)
CAR
V2
- Remote Friend Control
V2
(optional)
CRD - Remote digital control (optional)
E1 - Ignition plugs
E2 - Igniter sensor
E4 - Safety thermostat
F1 - Neutral fuse
F2 - Line fuse
M1 - Boiler circulating pump
M20 - Fan
M30 - 3-way valve (motorised)
R5 - Domestic water temp. trimmer
R6 - Heating temp. trimmer
R10 - Main selector switch
S6 - Fumes pressure switch
S8 - Gas type selector
S20 - Environment thermostat (optional)
T2 - Switch-on transformer
X40 - Environment thermostat jumper
Y1 - Gas valve
Y2 - Gas valve modulator
1 - Primary
2 - Secondary
3 - 230 Vac 50Hz Power supply
4 - 230 Vac 50Hz max 2° aux. output
5 - Card area
6 - Yellow/Green
7 - Blue
8 - Brown
9 - White
10 - Green
11 - Red
12 - Black
13 - Grey
14 - Heating
15 - Domestic water
Remote controls: the boiler is designed to use
the Remote Friend Control
V2
(CAR
V2
), or as an
alternative to the Digital Remote Control (CRD)
which must be connected to clamps 42 and 43 of
connector X9 for the CAR
V2
(respecting polarity)
and clamps 40 and41 of connector X9 for the CRD
on the circuit board and in both cases eliminating
X40.
Environment thermostat (alternative to the CRD):
the boiler is designed to use the Room Thermostat
(S20). Connect it to clamps 40 – eliminating
jumper X40.
Connector X12 (RS 232) is used for automatic
inspection for connection to the personal
computer.
3.3 TROUBLESHOOTING.
N.B.: Maintenance must be carried out by a
qualified technician (e.g. Immergas 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
occur on the burner train. The fan may start but
the safety air pressure switch does not change the
contact. Make sure:
1) the intake/exhaust duct is not too long (over
allowed length).
2) the intake/exhaust duct is not partially blocked
(on the exhaust or intake side).
3) the diaphragm on the fume exhaust is adequate
for the length of the intake/exhaust ducts.
4) the fan power supply voltage is not less than
196 V.
- Irregular combustion (red or yellow flame).
This may be 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.
- Frequent activation of the temperature overload
thermostat. This may be caused by lack of water
in the boiler, insufficient water circulation in
the circuit or a blocked circulator. Check via the
pressure gauge that values are within admissible
limits. Check that radiator valves are not all
closed.
- Presence of air in the system. Check opening of
the special air bleeding cap (Fig. 1-30). Make
sure the system pressure and expansion tank
pre-charge values are within the set limits; the
pre-charge value for the expansion tank must be
1.0 bar, and system pressure between 1 and 1.2
bar.
- Ignition block: (Para. 2.5).
- Domestic water probe broken. The boiler does
not have to be emptied in order to replace the
domestic water probe as the probe is not in direct
contact with the domestic hot water present in
the boiler.