Adjustments Prior To Ignition (Gas); Burner Start-Up (Gas); Burner Ignition - Riello RLS 70 Installation, Use And Maintenance Instructions

6.4

Adjustments prior to ignition (gas)

Combustion head adjustment is already described on page 20.
In addition, the following adjustments must also be made:
 open the manual valves upstream of the gas train.
 Adjust the minimum gas pressure switch to the start of the
scale (Fig. 39).
 Adjust the air pressure switch to the start of the scale
(Fig. 38).
 Purge the air from the gas line. We recommend using a
plastic tube routed outside the building and to purge air until
gas is smelt.
 Fit a U-type pressure gauge (Fig. 34) to the gas pressure
test point on the pipe coupling.
 Used to approximately calculate burner output in the 2nd
stage using the Tab. K on page 25.
 Connect two lamps or testers in parallel to the two gas line
solenoid valves VR1 and VS in order to check the exact
moment at which voltage is supplied. This operation is not
required if each of the two solenoid valves is equipped with a
pilot light that signals voltage passing through.
6.5

Burner start-up (gas)

It is recommended to adjust first the light oil burner
and then the gas burner.
Carry out the fuel change with burner off.
ATTENTION
Close the remote controls and turn:
 switch 1)(Fig. 32 on page 29) in "BURNER ON" position;
 switch 2)(Fig. 32 on page 29) in "1st STAGE" position:
 fuel selector switch in "GAS" position (Fig. 35).
As soon as the burner starts, check that the lamps or the testers
connected to the solenoid valves or the warning lights on the
solenoid valves indicate no voltage presence. If voltage is
present, stop the burner immediately and check the electrical
wiring.
6.6

Burner ignition

Once the above steps are completed, the burner should ignite.
If the motor starts but the flame does not appear and the control
box goes into lockout, reset and wait for a new ignition attempt.
If ignition does not occur, it is possible that gas is not reaching the
combustion head within the safety time period of 3 seconds.
Therefore, it is necessary to increase gas ignition delivery.
The arrival of gas to the sleeve is indicated by the U-type
pressure gauge (Fig. 34).
20139915
Start-up, calibration and operation of the burner
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
delivery at the minimum.
CAUTION
If the burner locks out again, refer to chapter "Faults - Possible
causes - Solutions" on page 40.
In the event the burner stops, in order to prevent
any damage to the installation, do not unblock the
burner more than twice in a row. If the burner
locks out for a third time, contact the customer
ATTENTION
service.
In the event there are further lockouts or faults
with the burner, the maintenance interventions
must only be carried out by qualified, authorised
personnel, in accordance with the contents of this
DANGER
manual and in compliance with the standards and
regulations of current laws.
Once ignition has taken place, proceed with global calibration
operations.
30 GB
20141121
OFF
GAS
OIL
D1180
Fig. 34
Fig. 35