15
ADJUSTMENTS
Adjustments - brief description
Check that the combustion parameters are in the suggested limits.
Check the flow rate.
Adjust the combustion air and oil flow rate.
Adjustment procedure
The light oil flow rate is set by choosing a nozzle that suits the boiler/utilisation output and setting the delivery and return pressure
values according to the ones quoted in the table below (as far as reading the pressure values, see next paragraphs).
Choice of the oil nozzle
Tab. 1
ATTENTION:
before starting the burner up, be sure that the manual cutoff valves are open and check that the pres-
sure upstream the gas train complies the value quoted on paragraph “Technical specifications”. Be sure that the
mains switch is closed.
Before starting up the burner, make sure that the return pipe to the tank is not obstructed. Any obstruction would
cause the pump seal to break.
.
ATTENTION:
During commissioning operations, do not let the burner operate with insufficient air flow (danger of formation
of carbon monoxide); if this should happen, make the gas decrease slowly until the normal combustion values are achieved.
IMPORTANT! the combustion air excess must be adjusted according to the in the following chart:
Recommended combustion parameters
Fuel
Recommended (%) CO
2
Recommended (%) O
2
Light oil
11.5 ÷ 13
2.9 ÷ 4.9
Keys
EV1 Light oil solenoid valve
M Pressure gauge
P Pump
Pump pressure= 12 bar
(factory set)
Fig. 9
nozzle Size
PUMP PRESSURE bar
8
9
10
11
12
13
14
15
16
17
18
GPH
Flow rate kg/h
0.40
1.36 1.44 1.52 1.59 1.66 1.73 1.80 1.86 1.92 1.98 2.04
0.50
1.70 1.80 1.90 1.99 2.08 2.17 2.25 2.33 2.40 2.48 2.55
0.60
2.04 2.16 2.28 2.39 2.50 2.60 2.70 2.79 2.88 2.97 3.06
0.65
2.21 2.34 2.47 2.59 2.70 2.82 2.92 3.02 3.12 3.22 3.31
0.75
2.55 2.70 2.85 2.99 3.12 3.25 3.37 3.49 3.60 3.71 3.82
0.85
2.89 3.06 3.23 3.39 3.54 3.68 3.82 3.95 4.08 4.21 4.33
1.00
3.40 3.60 3.80 3.98 4.16 4.33 4.49 4.65 4.80 4.95 5.10
1.10
3.74 3.96 4.18 4.38 4.58 4.76 4.94 5.12 5.29 5.45 5.61
1.20
4.08 4.32 4.56 4.78 4.99 5.20 5.39 5.58 5.77 5.94 6.12
1.25
4.25 4.50 4.75 4.98 5.20 5.41 5.62 5.82 6.01 6.19 6.37
1.35
4.59 4.86 5.13 5.38 5.62 5.85 6.07 6.28 6.49 6.69 6.88
1.50
5.10 5.41 5.70 5.98 6.24 6.50 6.74 6.98 7.21 7.43 7.64
1.65
5.61 5.95 6.27 6.57 6.87 7.15 7.42 7.68 7.93 8.17 8.41
1.75
5.95 6.31 6.65 6.97 7.28 7.58 7.87 8.14 8.41 8.67 8.92
2.00
6.80 7.21 7.60 7.97 8.32 8.66 8.99 9.30 9.61 9.91 10.19
2.25
7.64 8.11 8.55 8.96 9.36 9.74 10.11 10.47 10.81 11.14 11.47
EV
P
M
