Riello RLS 300/E MX, Installation, Use And Maintenance Instructions

Page: 33 / 60

31
20009654
GB
Start-up, calibration and operation of the burner
6.1 Notes on safety for the first start-up
6.2 Adjustments before first firing
Adjustment of the combustion head has been illustrated on pag.
21.
In addition, the following adjustments must also be made:
–
Slowly open the manual valves situated upstream of the gas
train.
– Adjust the minimum gas pressure switch to the start of the
scale.
– Adjust the maximum gas pressure switch to the start of the
scale.
– Adjust the air pressure switch to the zero position of the
scale.
– Purge the air from the gas line. Continue to purge the air (we
recommend using a plastic tube routed outside the building)
until gas is smelt.
– Fit a U-type manometer or a differential pressure gauge
(Fig. 33), with the (+) fitting on the header gas pressure tap
and (-) fitting in the combustion chamber. The manometer
readings are used to calculate MAX. burner power using the
table on pag. 27.
– Connect two lamps or testers to the two gas line solenoid
valves to check the exact moment at which voltage is sup-
plied. This operation is unnecessary if each of the two sole-
noid valves is equipped with a pilot light that signals voltage
passing through.
6.3 Burner starting
Close load controls and set switch 1) (Fig. 34) to "MAN".
Make sure that the lamps or testers connected to the solenoids,
or pilot lights on the solenoids themselves, indicate that no volt-
age is present. If voltage is present, then immediately stop the
burner and check electrical connections.
6.4 Burner firing
Having completed the checks indicated in the previous heading,
the burner should fire.
If the motor starts but the flame does not appear and the control
box goes into lock-out, reset and wait for a new firing attempt.
If firing is still not achieved, it may be that gas is not reaching the
combustion head within the safety time period of 3 seconds.
In this case increase gas firing delivery.
The arrival of gas at the sleeve is indicated by the U-type manom-
eter (Fig. 33).
After burner firing a complete burner adjustment should be per-
formed.
6 Start-up, calibration and operation of the burner
WARNING
The first start-up of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
WARNING
Check the correct working of the adjustment, com-
mand and safety devices.
CAUTION
Before starting up the burner it is good practice to
adjust the gas train so that ignition takes place in
conditions of maximum safety, i.e. with gas deliv-
ery at the minimum.
+
Fig. 33
D3515
Fig. 34
0 AUTO MAN
- +
1 2
D3108
3
D3531