19
ENG
“gaSteam HARDWARE” +030220940 - rel. 1.6 - 06.12.2013
PROPANE/ BUTANE/LPG CALIBRATION
IMPORTANT: Do not start the burner (delivered with default calibration
for natural gas!) supplied on propane or LPG until having turned the
maximum gas fl ow control screw (B) around 2.5-3 turns clockwise.
The heat value of propane in fact is around three times higher than
natural gas, therefore the maximum gas fl ow must be reduced before
igniting the burner.
After having reduced the gas fl ow as above, ignite the burner and then
calibrate the gas fl ow by analysing the fl ue gas, as described in paragraphs
5.6.5 – 5.6.6.
U
G
45
U
G
90
U
G
180
n. giri
min
max
min
max
min max
G30-G31
1650
4200
1850
4450
2000 5150
Tab. 5.c
5.6.6
C
alibrating the burner at maximum output
Operate the burner at maximum output as shown in Table 5.c, setting the
fan speed to the maximum level, and check by analysing the fl ue gas that
the CO2 value is10.5% ±0.5%.
If the values measured are diff erent, proceed as follows:
1.
open the front door;
2.
adjust the gas fl ow regulator B (see Fig. 5.e) using a fl at blade
screwdriver or a 4 mm Allen key: turn anticlockwise to increase the
CO2 value, to decrease it;
3.
wait for the correct CO2 value to stabilise; if necessary, repeat the
operations.
5.6.7
C
alibrating the burner at minimum output
Operate the burner at minimum output, setting the fan speed to the
minimum level, and check by analysing the fl ue gas that the CO
2
value
is 9.9% ±0.5%.
If the values measured are diff erent, proceed as follows:
1.
open the front door;
2.
remove the cap from the gas valve pressure regulator and adjust
the pressure regulator A (see Fig. 5.e) using a no. 40 Torx key: turn
clockwise to increase the CO
2
value, anticlockwise to decrease it
(Important: make small adjustments, as the screw is very sensitive);
3.
wait for the correct CO
2
value to stabilise; if necessary, repeat the
operations.
4.
replace the cap on the regulator;
WARNING:
Once the calibration at minimum output has been performed,
check the MAXIMUM calibration again, as it may have been aff ected by
the MINIMUM calibration; if necessary, repeat the operations described
in Calibrating at maximum output. Then restart automatic operation of
the burner.
To check the correct position of the burner electrodes, see “Cleaning the
burner”.
IMPORTANT:
make sure that the CO values in steady operation do not
exceed 100 ppm.
5.6.8
S
hutdown
During seasonal shutdown or shutdown for maintenance of the electrical
parts and/or the water circuit, the humidifi er should be placed out-of-
service (see the controller manual - cod. +030220930).
