Riello RS 100/E MZ, Инструкции по установке, использованию и обслуживанию

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32
GB
Start-up, calibration and operation of the burner
5
5.10 Burner adjustment
Output upon ignition
According to the regulation EN 676.
Burners with MAX output up to 120 kW
Ignition can be performed at the maximum operation output
level. Example:
³
max. operation output: 120 kW
³ max. output upon ignition: 120 kW
Burners with MAX output above 120 kW
Ignition must be performed at a lower output than the max. oper-
ation output.
If ignition output does not exceed 120 kW, no calculations are
required. If ignition output exceeds 120 kW, the regulations pre-
scribe that the value be defined according to the control box
safety time "ts":
for ts = 3s, ignition output must be equal to, or lower than, 1/3 of
max. operation output.
Example
MAX operation output of 450 kW.
The ignition output must be equal to, or less than, 150 kW with
ts = 3 s
In order to measure the ignition output:
³ disconnect the plug-socket 7)(Fig. 5) on the ionisation probe
cable (the burner will fire and then go into lockout after the
safety time has elapsed);
³ perform 10 ignitions with consecutive lockouts;
³ on the meter, read the quantity of gas burned:
this quantity must be equal to, or lower than, the quantity
given by the formula, for ts = 3s:
Vg: volume supplied in ignitions carried out (Sm
3
)
Qa: ignition delivery (Sm
3
/h)
n: number of ignitions (10)
ts : safety time (sec)
Example for gas G 20 (9.45 kWh/Sm
3
):
ignition output 150 kW
corresponding to 15.87 Sm
3
/h.
After 10 ignitions with lockout, the delivery indicated on the
meter must be equal to, or less than:
Maximum output
The MAX output must be set within the firing rate of Fig. 3.
Gas adjustment
Measure the gas delivery on the meter.
As a general rule, this value can be found on the table on page
52: just read the gas pressure on the pressure gauge (Fig. 38)
and follow the indications given on page 52.
³ If it is necessary to reduce it, lower the output gas pressure
via the pressure adjuster located beneath the gas valve.
³ If it needs to be increased, increase the output gas pressure
via the adjuster.
Note
Check that the combustion is satisfactory and without pulsations.
Air adjustment
If necessary vary the degrees of the air servomotor.
Minimum output
The MIN output must be set within the firing rate of Fig. 3.
Vg =
3600
Qa (max. burner delivery) x n x ts
Vg =
3600
15.87 x 10 x 3
= 0.132 Sm
3
5.9 CALC function
P0 P1 P2 P3 P4 P5 P6 P7 P8 P9
0
10
20
30
40
50
60
70
80
90
100
A
ngle
(deg
re
es
)
Point of the curve
original
curve
P0 P1 P2 P3 P4 P5 P6 P7 P8 P9
0
10
20
30
40
50
60
70
80
90
100
Fu
el
The diagram of Fig. 36 shows the fuel modulation curve
when, after the modification of point “P5”, the recalculation
of all the other points is not carried out.
CALC-
CALC+
Point of the curve
A
ngle
(deg
re
es
)
D7909
D7908
Fig. 35 Fig. 36
Fu
el
Recalculation
The diagram of Fig. 35 shows how the fuel modulation curve is
modified if the values of point “P5” are changed.
By keeping the key
“+” pressed for more than 3 s, the points
from “P6” to “P8” are recalculated.
By keeping the key
“-” pressed for more than 3 s, the points from
“P4” to “P2” are recalculated.