Converting The Boiler To Other Types Of Gas; Checks Following Conversion To Another Type Of Gas; Complete Calibration Function - Immergas VICTRIX 24 TT 1E Instruction And Warning Book

3.5 CONVERTING THE BOILER TO
OTHER TYPES OF GAS.
If the boiler has to be converted to a different type
of gas to that specified on the data nameplate,
proceed as follows:
The gas conversion operation must be carried
out by an authorised company (e.g. Immergas
After-Sales Technical Assistance Service).
To convert to another type of gas the following
operations are required:
- Select, via programming menu "G", the type of
gas by selecting "nG" for methane gas and "LG"
for LPG gas. (See par. 3.11).
- Carry out complete calibration (see par. 3.7);
during the procedure check and, if necessary,
correct the air - gas ratio.
- Upon completing the conversion, apply the
sticker regarding the modified gas content onto
the data nameplate in the connection box.
These adjustments must be made with reference
to the type of gas used, following that given in
the table (Par. 3.21).
3.6 CHECKS FOLLOWING
CONVERSION TO ANOTHER TYPE
OF GAS.
After having made sure that the conversion is
complete and that the calibration has been suc-
cessful, you must make sure that:
- there is no flame in the combustion chamber
- the burner flame is not too high or low and that
it is stable (does not detach from burner)
- the pressure testers used for calibration are
perfectly closed and there are no leaks from
the gas circuit.
N.B.: all boiler adjustments must be carried
out by a qualified technician (e.g. Immergas
After-Sales Technical Assistance).
3.7 COMPLETE CALIBRATION
FUNCTION.
Attention: complete calibration is required in the
event of converting to another type of gas, during
special maintenance involving the replacement
of the P.C.B. (if the removable memory on the
replaced board is not reinserted), components of
the air and gas circuits and flame control.
N.B.: before carrying out complete calibration,
ensure that all the requirements indicated in
paragraphs 1.23 and 1.24 have been fulfilled.
N.B.: to access this function it is crucial that
there are no active requests for central heating
or DHW production.
In the event of anomaly "62" or "72" (see parag.
2.6) the boiler cancels any requests by itself.
N.B.: during the various calibration stages, the air
- gas ratio can be checked and possibly corrected
as described in par. 3.8.
The energy produced is dissipated via the
heating circuit; alternatively, the energy can be
released from the DHW circuit by opening any
hot water tap.
Caution: in this case the only active temperature
control is the flow probe that limits the maximum
temperature exiting the boiler at 90°C, therefore
be careful not to get burned.
- The calibration procedure involves three stages:
- nominal heat output calibration;
- intermediate heat output ignition calibration;
- minimum heat output calibration.
Each calibration procedure, if carried out without
altering the parameters, lasts 5 minutes at the
most, after which it switches automatically to
the next parameter until the calibration process
is complete.
In order to access the complete calibration
stage, you must switch the boiler on, set the
DHW selector in the "6 o' clock" position and
the heating selector in the "9 o' clock" position,
(Fig. 3-5) and press the "Reset" button for about
8 seconds until the "chimney sweep" function
is activated; then press the "summer / winter"
button within 3 seconds.
• Nominal heat output: with the function active,
the boiler carries out the procedures required
to calibrate the appliance at the nominal heat
output.
At this stage the display features flashing
icons: "summer", "winter", "stand-by" and the
operating temperature alternated with the
current operating heat output (99%); once the
parameters are detected and stabilised, the
frame of the flame presence symbol (ref. 10 fig.
2-1) will start flashing (this procedure may last
a few minutes), meaning that the nominal heat
output parameters have been set.
The air - gas ratio can only be corrected after
the flame presence frame has flashed (see parag.
3.8) or switch to the next heat output parameter
by pressing the "info" button.
29
• Intermediate heat output ignition: once the
nominal heat output calibration is confirmed,
the boiler is calibrated with the intermediate
heat output (or ignition heat output).
At this stage the display features flashing
icons: "summer", "winter", "stand-by" and the
operating temperature alternated with the cur-
rent operating heat output (typically 41% but
variable according to the boiler model); once
the parameters are detected and stabilised, the
frame of the flame presence symbol will start
flashing, meaning that the intermediate heat
output parameters have been set.
The air - gas ratio can only be corrected after
the flame presence frame has flashed (see parag.
3.8) or switch to the next heat output parameter
by pressing the "info" button.
• Minimum heat output: after having calibrated
the boiler with the intermediate heat output, it
is calibrated with the minimum heat output.
3-5
At this stage the display features flashing
icons: "summer", "winter", "stand-by" and the
operating temperature alternated with the
current operating heat output (0%); once the
parameters are detected and stabilised, the
frame of the flame presence symbol will start
flashing, meaning that the minimum heat
output parameters have been set.
The air - gas ratio can only be corrected after
the flame presence frame has flashed (see parag.
3.8) or exit the calibration mode by pressing the
"summer / winter" button.
In the event you wish to exit the calibration
3-6
mode without storing the parameters acquired,
you must press and hold the "Reset" button for
about 8 seconds, or alternatively disconnect the
boiler from the power supply.
3-7
3-8