Gas Valve Calibration; Gas Conversion - Baxi LUNA DUO-TEC MP 1.35 Manual De Uso

15. GAS VALVE CALIBRATION

To calibrate the gas valve, enable the calibration function as described in section 12.2 and
carry out the following operations:
1) Calibrating MAXIMUM heat output.
Check that the measured on the flue duct, with the boiler operating at maximum heat
capacity, matches that indicated in table 2 (allowed tolerance +/- 0.5%). If it does not, turn
the adjustment screw (V) on the gas valve. Turn the screw clockwise to decrease the level
of and anti-clockwise to increase it (allowed tolerance +/- 0.2%).
2) Calibrating REDUCED heat output
Check that the measured on the flue duct, with the boiler operating at minimum heat
capacity, matches that indicated in table 2 (allowed tolerance +/- 0.5%). If it does not, turn the
adjustment screw (K) on the gas valve. Turn the screw clockwise to increase the level of
and anticlockwise to decrease it (allowed tolerance +/- 0.2%).
V Gas flow adjustment screw
K OFFSET adjustment screw

15.1 GAS CONVERSION

When converting from natural gas to propane (LPG), before calibrating the gas valve as described above, replace the venturi
assembly (B) as indicated in the figure. To achieve this, release the gas pipe (fixed with clips for models 1.35 - 1.50 -1.60 and
threaded nut G1" for model 1.70) and remove the three screws securing the flange. Afterwards, make sure there are no gas
leaks. Modify the parameters (fan rpm) as indicated in table 2 following the procedure described in section 14.
TABLE 2
PARAMETERS - rpm
**
P60 P30 - P61
Min. power Max. power
Boiler
model
G20 G31 G20
1.35 1500 1500 5000
1.50 1500 1500 6650
1.60 1420 1420 6750
1.70
1270 1270 6450
*
CO with cover closed. Without cover (chamber open) the value is less than 0.2%.
2
* *
value read on the boiler front panel display to multiply x 10 (e.g.: 150 corresponds to 1500 rpm)
To simplify calibration of the gas valve, set the "calibration function" directly on the boiler control panel as described in
section 12.2.
For cascade ducts, change the parameter P60 increasing the number of fan revolutions by 200 (see table 1B in chapter 10.3).
Pi Gas supply pressure tap
LUNA DUO-TEC 1.35-1.50-1.60
** **
P59
Ignition power
G31 G20 G31
4800 2300 3000
6400 2300 3000
6600 2000 2500
6100 2100 2500
LUNA DUO-TEC 1.70
VENTURI GAS NOZZLES
Ø (mm) Ø (mm)
G20-G31 G20 G31
3.7 2.95
24
(n°2) (n°2)
3.7 2.95
24
(n°2) (n°2)
4.6 3.45
28
(n°2) (n°2)
5.3
30 4.0 (n°2) *8.5 *9.5 *9.0
(n°2)
17
CO Min CO Max Max. CO
2 2
(%) (%) (ppm)
G20 G31 G20 G31 G20/G31
*8.5 *9.5 *9.0 *10
*8.5 *9.5 *9.0 *10
< 250
*9.0 *9.4 *9.0 *10.1
*10
7225065.02 (4-05/17)