Operation Sequence Of The Burner; Burner Start-Up; Operation; Burner Flame Goes Out During Operation - Riello RLS 1000/M C13 Installation, Use And Maintenance Instructions

6.13

Operation sequence of the burner

6.13.1 Burner start-up

0s TL thermostat/pressure switch closure.
Fan motor starts up.
6s Servomotor start: 130° rotation to the right, until the acti-
vation of the contact on cam 1).
If it's operating with oil or cam 4) if it's operating with gas.
48s The air damper positions on the MAX output.
Pre-purging with the air delivery of the MAX output.
80s The servomotor rotates towards the left until the angle set
on the cam 3).
If it's operating with oil or cam 5) if it's operating with gas.
109S The air damper and the gas butterfly valve adopt the MIN
output position.
113s Ignition electrode strikes a spark.
116s The pilot valves VP1 and VP2 open.
The flame is ignited at a low output level, point A
(Fig. 40).
119s The spark goes out.
130s The safety valve VS opens, along with the adjustment
valve VR (quick opening).
The output is then progressively increased, with the valve
opening slowly up to MIN output, point B (Fig. 40).
143s The control box starting cycle ends.

6.13.2 Operation

Burner without the output power regulator RWF40
Once the starting cycle is completed, the servomotor command
moves on to the TR thermostat/pressure switch that controls the
pressure or the temperature in the boiler, point C (Fig. 40).
(The electrical control box continues to check the presence of the
flame and the correct position of the air and gas maximum pres-
sure switches).
– If the temperature or the pressure is low so the thermostat/
pressure switch TR is closed, the burner progressively in-
creases the output up to the MAX value (section C-D).
– If subsequently the temperature or pressure increases until
TR opens, the burner progressively decreases its output to
the MIN value (section E-F). The sequence repeats endless-
ly.
– The burner locks out when the heat request is less than the
heat supplied by the burner at MIN output, (section G-H).
The TL thermostat/pressure switch opens, and the servomo-
tor returns to angle 0 limited by the contact of the cam 2).
The air damper closes completely to reduce heat losses to a
minimum.
For every change of output, the servomotor will automatically
change the gas output (butterfly valve), the air output (fan damp-
er) and the air pressure (2 shutters in the combustion head).
Burner with the output power regulator RWF40
See manual enclosed with the adjuster.
Start-up, calibration and operation of the burner
TL
TR
M
VP1
VP2
VS
VR
M
TL
TR
M
VP1
VP2
VS
VR
M

6.13.3 Burner flame goes out during operation

If the flame should accidentally go out during operation, the burner
will lock out within 1s.

6.13.4 Ignition failure

If the burner does not fire (Fig. 41), it goes into lockout within 3
sec. after the gas valve opening and 119 seconds after the TL
closure.
35 GB
NORMAL IGNITION
NO IGNITION
Fig. 40
Fig. 41
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