Baxi Luna 3 Silver Space Series Operating & Installation Instructions Manual page 69

C1) adjustment to nominal heat output:
• open the gas tap;
• press (figure 1) and switch the boiler to the winter mode;
• open a hot water tap that can provide a flow rate of at least 10 litres a minute or make sure there is maximum heat
demand;
• make sure that the dynamic inlet pressure of the boiler, measured at the gas valve pressure test point (Pa) (Figure 15)
is correct (37 mbar for propane or 20 mbar for natural gas).
• remove the modulator cover;
• adjust the brass screw (a) in Fig. 16 until the pressure values shown in Table 1 are obtained;
C2) adjustment to reduced heat output:
• disconnect the modulator power cable and unscrew the screw (b) in Fig. 16 until a pressure value corresponding to
reduced heat output is achieved (see Table 1);
• reconnect the wire;
• mount the modulator cover and seal.
C3) final checks
• indicate the type of gas and relative settings on the rating plate.
Figure 16
Table of burner injectors
gas type
diameter of nozzles (mm)
Burner pressure (mbar*)
REDUCED HEAT OUTPUT
Burner pressure (mbar*)
RATED HEAT OUTPUT
Number of injectors
* 1 mbar = 10,197 mm H O
2
Table 1
Consumption 15 °C - 1013 mbar
Rated heat output
Reduced heat output
p.c.i.
Table 2
INSTRUCTIONS FOR FITTERS
Honeywell valve
250 Fi
G20 G31
1,18 0,74
1,9 4,9
11,3 29,4
G20
2,84 m /h
3
1,12 m /h
3
34,02 MJ/m
a
b
310 Fi
G20 G31
1,28 0,77
1,8 4,9
13,0 35,5
15
250 Fi
G31
2,09 kg/h 3,52 m
0,82 kg/h 1,26 m
46,3 MJ/kg 34,02 MJ/m
3
69
Sit valve
310 Fi
G20 G31
/h 2,59 kg/h
3
/h 0,92 kg/h
3
46,3 MJ/kg
3
925.523.1 - EN