56
ENG
Checks before commissioning
g0300122EN rel. 1.0 - 01.12.2021
11.3
D
iff erent types of gas supply
IMPORTANT:
the appliances are delivered calibrated and tested to operate on natural gas (methane).
The humidifi er can be supplied by the following types of gas:
• Natural gas (G20-G25 methane - factory setting).
• Propane-Butane (LPG G30-G31).
IMPORTANT:
models UG150, UG300, UG450 are not certifi ed to operate on propane - butane (G30- G31).
A number of parameters on the electronic controller need to be set for correct operation, calibrating combustion by checking
the values of CO2 (% vol) and CO (ppm) in the fl ue gas:
NATURAL GAS/LPG CALIBRATION
no. of turns
UG45
UG90
UG150
UG180
UG300
UG450
Gas
min
max
min
max
min
max
min
max
min
max
min
max
G20-G25
1450
4700
1700
5050
1900
6750
2000
5300
1900
6750
1900
6750
G30-G31
1650
4200
1850
4450
-
-
2000
5150
-
-
-
-
Tab. 11.a
11.3.1
G
as burner calibration
The burner is pre-calibrated in the testing phase by the manufacturer; nonetheless, combustion should be checked and adjust-
ed if necessary.
11.3.2
P
reparing to analyse combustion
If the fl ue gas exhaust pipe is positioned horizontally or vertically:
5. remove the cap from the inspection section of the humidifi er fl ue gas exhaust pipe;
6. insert the fl ue gas analyser probe;
7. perform the fl ue gas analysis.
Once analysis has been completed, reposition the cap on the inspection section.
Fig. 11.b
11.3.3 Type of calibration
Two diff erent types of burner calibration are available:
A. Guided;
B. Manual.
The guided procedure automatically provides the user, step by step, with all the information necessary to complete the calibra-
tion process. For the manual procedure, follow the instructions below.