Adjustment Of The Air-Gas Ratio; Checks Following Conversion To Another Type Of Gas; Programming The P.c.b - Immergas VICTRIX EXA 24 X 1 ErP Instruction And Recommendation Booklet

3.6 ADJUSTMENT OF THE AIR GAS
RATIO.
Attention: the CO
veri cation operations must
2
be carried out with the casing mounted, while the
gas valve calibration operations must be carried
out with the casing open and disconnecting the
boiler from the power supply.
Calibration of the minimum CO
heating power).
Enter the chimney sweep phase without with-
drawing domestic hot water and take the se-
lector switches to minimum (turn them in an
anti-clockwise direction until "0" is seen on the
display). To have an exact value of CO
gas the technician must insert the sampling probe
to the bottom of the sample point, then check
that the CO value is that speci ed in the table,
2
otherwise adjust the screw (3 Fig. 3-3) (O -Set
adjuster). To increase the CO value, turn the
2
adjustment screw (3) in a clockwise direction
and vice versa to decrease it.
Calibration of the maximum CO
central heating power).
On completion of the adjustment of the mini-
mum CO keeping the chimney sweep function
2
active, take the heating selector switch to maxi-
mum (turn it in a clockwise direction until "99"
is seen on the display). To have an exact value of
CO in the ue gas the technician must insert
2
the sampling probe to the bottom of the sample
point, then check that the CO value is that speci-
2
ed in the table, otherwise adjust the screw (12
Fig. 3-3) (gas ow rate regulator).
To increase the CO value, turn the adjustment
2
screw (12) in an anti-clockwise direction and vice
versa to decrease it.
At every adjustment variation on the screw 12 it
is necessary to wait for the boiler to stabilise itself
at the value set (about 30 sec.).
Parameter
Parameter
ID
Minimum DHW
S0
output
fective heating demand of the house.
Maximum DHW
S1
gas pressure eld between minimum and maximum power depending on the system
output
heat load, setting fan speed (in rpm, hundreds of revs are represented on the display).
Minimum CH
S2
N.B.: the boiler is produced and calibrated in the central heating phase at nominal output.
output
Approximately 10 minutes are needed to reach the nominal heat output, which can be
Maximum CH
S3
changed using the parameter (S3).
output
N.B.: selection of parameters in the presence of requests, allows boiler functioning with
Power
current equal to the respective value.
S4
block
Central heating
set point mini-
S5 De nes the minimum ow temperature.
mum tempera-
ture
Central heating
set point maxi-
S6 De nes the maximum ow temperature.
mum tempera-
ture
If the reading of the external probe is not correct it is possible to correct it in order to
External probe compensate any environmental factors.
S7
correction (Over the value of +9 the display shows "CE", which enables an external control function
of the boiler for coupling of the same with a system supervisor)
Identi es the boiler's power (only useful with a coupled storage tank and parameter
S8 Boiler power
P0=1).
Victrix EXA 24 X 1 ErP
CO at nominal
2
output
(central heating)
G 20 9.40% ± 0.2
G 30 12.00% ± 0.2
(minimum
G 31 10.80% ± 0.2
2
3.7 CHECKS FOLLOWING
CONVERSION TO ANOTHER TYPE
OF GAS.
A er making sure that conversion was carried
in the ue
out with a nozzle of suitable diameter for the
2
type of gas used and the settings are made at the
correct pressure, check that the burner ame is
not too high or low and is stable (does not detach
from burner);
N.B.: all boiler adjustment operations must be
carried out by a quali ed company (e.g. Author-
ised A er-Sales Technical Assistance).
(nominal
2
e boiler also has electronic modulation that adapts the boiler potentiality to the ef-
CO at minimum
2
output
(central heating)
8.60% ± 0.2
11.40% ± 0.2
10.40% ± 0.2
Description
erefore the boiler works normally in a variable
28

3.8 PROGRAMMING THE P.C.B.

e boiler is prepared for possible programming
of several operation parameters. By modifying
these parameters as described below, the boiler
can be adapted according to speci c needs.
To access the programming phase, position
the DHW selector (5) on position "6", the CH
selector (6) on position "9" and press the "Reset"
(3) and "Summer/Winter" buttons for about 8
seconds (2).
Once the menu has been accessed, it is possible
to scroll through the three sub-menus present
(s, p, t) by pressing the "Summer/Winter" (2)
button for 1 second.
Use the "DHW regulator" selector (5), to select
the parameter (inside the same sub-menu) and
rotate the "CH regulator" selector (6) to modify
the value according to the range available.
Press the "Reset" button (3) for 1 second to
memorise the variation of the parameters
Memorisation is represented via "88" on the
indicator (14) for 2 seconds.
Exit the programming mode by waiting for
15 minutes or by pressing the, "Reset" (3) and
"Summer/Winter" (2) buttons simultaneously.
Range
900 ÷ 1500
3500 ÷ 6100
S0 ÷ S3
S2 ÷ S1
1500 ÷ 3500
20 ÷ 50 °C
(S5+5) ÷ 85 °C
-9 ÷ 9 K
0 = 12 kW
1 = 26 kW
2 = 28 kW
3 = 32 kW
Default
1400
G20 = 4600
LPG = 4600
1400
G20 = 4600
LPG = 4600
G20 = 2000
G30 = 2000
G31 = 2000
25
85
0
1