Riello P 300 P/G, Инструкции по установке, использованию и обслуживанию

Страница: 31 / 56

29 20170350 GB
Start-up, calibration and operation of the burner
7.7 Servomotor adjustment
The servomotor adjusts simultaneously, through driving gears,
the output and pressure of the air and the delivery of the fuel in
use. It performs a 135° rotation in 45s. After the adjustment made
in the factory to its 6 cams to allow an initial ignition.
Check that they are as shown below.
In the event of a modification, follow what is described below for
each cam:
7.8 Pressure switch adjustment
7.8.1 Oil pressure switch
It triggers the lockout condition of the burner in case of too much
counter-pressure on the fuel return line.
Recommended calibration (recommended values with return line
resistance in tank of

0.5 bar): 3.0 ÷ 3.5 bar .
In case of control box lockout (in position “P”) calibrate the
pressure switch again with incremental values of 0.5 bar.
To adjust the pressure switches, use a tool to operate the
adjustment screw, see Fig. 29.
Cam I (RED): 130 ° (The same for all models).
Limits rotation toward
maximum position.
ATTENTION
Do not make any adjustments.
Cam II (BLUE): 0° (The same for all models).
Limits rotation toward
minimum position. With the
burner off, the air damper is
completely closed: 0°
ATTENTION
It is recommended that no adjustments are made.
Cam III (ORANGE): 20° (The same for all models).
Adjusts the position of ignition
and minimum output of gas
fuel.
Cam IV (YELLOW): Not used
Cam V (BLACK): Not used
Cam VI (GREEN): Not used
VI
V
IV
III
II
I
0
8
00 35
1
L
SQM40
SQM41
R
90
60
60
90
30
13 5
00 R
Fig. 28
20074577
Fig. 29
20079898