Riello 3768000, Инструкции по установке, использованию и обслуживанию

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2902768
11 GB
4.5 AIR PRESSURE TEST POINT
ATTENTION
Should the air pressure test point device (A)
come loose by accident, you are advised to
turn it to the correct position as illustrated in
figure 8.
 Connect air pressure test point (A) to the
pressure switch (C) inlet (-) .
 Connect air pressure test point (B) to the
pressure switch (C) inlet (+) .
NOTE
There is a gauged diaphragm inside the pipes,
located near the air pressure test points.
If pipes are replaced, reuse the above-men-
tioned diaphragms.
4.6 AIR PRESSURE SWITCH
Adjust the air pressure switch after having performed all other burner adjustments starting with the air pres-
sure switch set to the start of the scale. With the burner operating at the required power, slowly turn knob
clockwise until burner locks out. Then turn the knob anti-clockwise by about 20% of the set point and subse-
quently check to see if burner has started correctly. If the burner locks out again, turn the knob anti-clockwise
a little bit more, then obstruct the air intake and make sure the unit locks out.
NOTE
With the burner operating at minimum output, the pressure switch must be adjusted to 5 mbar and you must
obstruct the air intake and make sure the unit locks out.
Attention
As a rule, the air pressure switch must prevent the air pressure from lowering below 80 % of the adjustment
value as well as preventing CO from forming in the flue gases.
Typical normal operating values would be below 100 ppm. However to check the operation of the air pres-
sure switch, the air intake can be slowly blocked off until the burner locks out. The CO concentration in the
flue gases must not exceed (1%) 10,000 ppm.
To check this, insert a combustion analyser into the chimney, slowly close the fan suction inlet
(for example
with cardboard) and check that the burner locks out, before the CO in the fumes exceeds 1 %.
4.7 BURNER START-UP CYCLE
Lock-out is indicated by a lamp on the control box (5, fig. 1, page 1).
When the flame-failure occurs during working, shut down takes place within one second.
D4244
Fig. 8
A
B
C
Lock-out, due to light failure
A
Normal
2,5s
D4245
2s 400 ms
37s 3s
2,5s 2s 400 ms
3s
36s
Thermostat
Ignition transformer
Motor
Valve
Flame signal
Lock-out signal
Remote reset signal
Air pressure switch
A