Troubleshooting; Converting The Boiler To Other Types Of Gas; Calibration Of Number Of Fan Revs - Immergas VICTRIX EXA 24 X 1 ErP Instruction And Recommendation Booklet

3.3 TROUBLESHOOTING.

N.B.: maintenance operations must be carried
out by an authorised company (e.g. Authorised
A er-Sales Technical Assistance Service).
- Smell of gas. Caused by leakage from gas circuit
pipelines. Check sealing e ciency of gas intake
circuit.
- Repeated ignition blocks. It can be caused by
no gas, check the presence of pressure in the
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 (O -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. is 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 ow of condensate.
- Heat exchanger clogged. is 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 ow of
condensate.
- Noise due to air in the system. Check opening
of the special air vent valve cap (Fig. 1-30).
Make sure the system pressure and expansion
vessel pre-charge values are within the set
limits; e factory-set pressure values of the
expansion vessel must be 1.0 bar, the value of
system pressure must be between 1 and 1.2 bar.
- Noise due to air inside the condensation mod-
ule. Use the manual air vent valve (Fig. 1-30)
to eliminate any air present in the condensa-
tion module. When the operation has been
performed, close the manual vent valve.
Gas Valve 848
3.4 CONVERTING THE BOILER TO
OTHER TYPES OF GAS.
If the boiler has to be converted to a di erent
gas type to that speci ed on the data nameplate,
request the relative conversion kit for quick and
easy conversion.
e gas conversion operation must be carried
out by an authorised company (e.g. Authorised
A er-Sales Technical Assistance Service).
To convert to another type of gas the following
operations are required:
- disconnect the appliance;
- replace the nozzle located between the gas pipe
and gas/air mixing sleeve (Part. 8 Fig. 1-30),
taking care to disconnect the appliance during
this operation;
- re-power the appliance;
- calibrate the number of fan revolutions (parag.
3.5):
in ue
2
- adjust the correct air/gas ratio (parag. 3.6);
- seal the gas ow rate regulation devices (if set-
tings are modi ed);
- after completing the conversion, apply the
sticker, contained in the conversion kit, near
the data nameplate. Using an indelible marker
pen, delete the data relative to the old type of
gas.
ese adjustments must be made with reference
to the type of gas used, following that given in
the table (Par. 3.18).
P1
P3
2
1
3.5 CALIBRATION OF NUMBER OF FAN
Attention: veri cation and calibration is neces-
sary, in the case of transformation to other types
of gas, in the extraordinary maintenance phase
with replacement of the PCB air/gas circuit com-
ponents or in the case of installations with ue
extraction systems, with horizontal concentric
pipe measuring more than 1 metre.
e boiler heat output is correlated to the length
of the air intake and ue exhaust pipes.
decreases with the increase of pipe length.
boiler leaves the factory adjusted for minimum
pipe length (1m). It is therefore necessary, espe-
cially in the case of maximum pipe extension, to
check the ∆p gas values a er at least 5 minutes
of the burner operating at nominal heat output,
when the temperatures of the intake air and ex-
haust ue gas have stabilised. Adjust the nominal
and minimum heat output in the domestic hot
water and central heating modes according to
the values in the table (Par. 3.18) using the dif-
ferential manometers connected to the ∆p gas
pressure points (16 and 17 Fig. 1-30).
Enter the con gurations menu and regulate the
following parameters (Par. 3.8):
- minimum DHW power output;
- maximum DHW power output;
- minimum central heating output;
- maximum central heating output;
- Ignition power.
Key:
12
3
27
REVS.
1 - Gas valve inlet pressure point
2 - Gas valve outlet pressure point
3 - O /Set adjustment screw
12 - Outlet gas ow rate regulator
is
e
3-3