Start-Up, Calibration And Operation Of The Burner; Notes On Safety For The First Start-Up; Adjustments Prior To Ignition (Light Oil); 1St And 2Nd Stage Nozzles - Riello RLS 70 Manual

6

Start-up, calibration and operation of the burner

6.1

Notes on safety for the first start-up

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
regulations of the laws in force.
ATTENTION
6.2

Adjustments prior to ignition (light oil)

It is recommended to adjust first the light oil burner
and then the gas burner.
Carry out the fuel change with burner off.
ATTENTION
The optimum calibration of the burner requires an analysis of the
flue gases at the boiler outlet and interventions on the following
points:
6.2.1

1st and 2nd stage nozzles

See information on page 20.
6.2.2

Combustion head

The adjustment of the combustion head already carried out on
page 21 need not to be altered unless the 2nd stage output of
the burner is changed.
6.2.3

Pump pressure

12 bar: this is the pressure calibrated in the factory which is
usually sufficient for most purposes. Sometimes, this pressure
must be adjusted to:
6.3

Burner ignition (light oil)

Start the burner by closing the remote controls, with the switch
1)(Fig. 33) in the "ON" position and with the fuel selector switch
set to "OIL" (Fig. 34).
The pump can be considered to be primed when the light oil
starts coming out of the screw 3)(Fig. 23 on page 24). Stop the
burner: set switch 1)(Fig. 33) to "OFF" and tighten the screw 3).
The time required for this operation depends upon the diameter
and length of the suction tubing. If the pump fails to prime at the
first start of the burner and the burner locks out, reset the burner
and repeat the start-up operation.
Do not light the flame sensor or the burner will lock out.
During the first firing, during the passage from the 1st to the 2nd
stage, there is a momentary lowering of the fuel pressure caused
by the filling of the 2nd nozzle tubing. This lowering of the fuel
pressure can cause the burner to lockout and can sometimes
give rise to pulsations.
20168481
Start-up, calibration and operation of the burner
Check the correct working of the adjustment,
command and safety devices.
ATTENTION
Before starting up the burner, refer to section
"Safety test - with no gas supply" on page 37.
ATTENTION
10 bar: in order to reduce fuel delivery. It is possible only if the
ambient temperature remains above 0 C;
14 bar: in order to increase fuel delivery or to ensure firings even
at temperatures of less than 0 °C.
In order to change pump pressure, act on screw 5)(Fig. 23 on
page 24).
(See information on page 24).
6.2.4

1st stage fan damper

Keep the burner operating at 1st stage by setting the switch
2)(Fig. 33) to the 1st stage position. The fan damper can be
adjusted by operating the orange level of the servomotor
("Servomotor adjustment" on page 33).
6.2.5

2nd stage fan damper

Turn switch 2)(Fig. 33) to the 2nd stage position. The fan damper
can be adjusted by operating the red level of the servomotor,
("Servomotor adjustment" on page 33).
BURNER
OFF
ON
30 GB
STAGE
1 2
D469
20141121
OFF
OIL GAS
1°.
2°.
Fig. 33
Fig. 34