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

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21
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Start-up, calibration and operation of the burner
5
5.4 Final calibration of the pressure switches
Air pressure switch
Adjust the air pressure switch after having performed all other
burner adjustments with the air pressure switch set to the start
of the scale (Fig. 29).
With the burner working at MIN output, insert a combustion
analyser in the stack, slowly close the suction inlet of the fan
(for example, with a piece of cardboard) until the CO value
does not exceed 100 ppm.
Slowly turn the appropriate knob clockwise until the burner
goes into lockout.
Check the indication of the arrow pointing upwards on the grad-
uated scale (Fig. 29). Turn the knob clockwise again, until the
value shown on the graduated scale corresponds with the
arrow pointing downwards, and so recovering the hysteresis of
the pressure switch (shown by the white mark on a blue back-
ground, between the two arrows).
Now check the correct start-up of the burner.
If the burner locks out again, turn the knob slightly anticlock-
wise.
During these operations it may be useful to measure the air
pressure with a pressure gauge.
The connection of the pressure gauge is shown in Fig. 29.
The standard configuration is that with the air pressure switch
connected in absolute mode. Note the presence of a “T” con-
nection, not supplied.
In certain applications in strong depression situations, the con-
nection of the pressure switch does not allow it to change over.
In this case it is necessary to connect the pressure switch in dif-
ferential mode, applying a second tube between the air pres-
sure switch and the fan suction line mouth. In this case also,
the pressure gauge must be connected in differential mode, as
shown in Fig. 29.
D3951
D8041
RS 70-100-130/E
RS 190-250/E
Connecting
the pressure
gauge with the
pressure
switch in dif-
ferential mode
Connecting
the pressure
gauge with the
pressure
switch in abso-
lute mode
Fig. 29
5.3 Burner start-up
Feed electricity to the burner via the disconnecting switch on the
boiler panel.
Close the thermostats/pressure switches and turn the switch of
Fig. 28 to position
“1” .
Carry out the “ Start-up procedure ”, as described on page 30.
Make sure that the lamps or testers connected to
the solenoids, or indicator lights on the solenoids
themselves, show that no voltage is present. If volt-
age is present, stop the burner
immediately and
check the electrical wiring.
D7729
Fig. 28
0
1
D7896
DANGER