Start-Up, Calibration And Operation Of The Burner; Notes On Safety For The First Start-Up; Adjustments Prior To Ignition; Burner Start-Up - Riello GAS 8 P/M Installation, Use And Maintenance Instructions

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 regula-
tions of the laws in force.
WARNING
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
6.2

Adjustments prior to ignition

Open the manual valves upstream of the gas train:
 adjust the minimum gas pressure switch to the start of the
scale (Fig. 33 on page 33).
 Adjust the maximum gas pressure switch to the end of the
scale (Fig. 34 on page 33).
 Adjust the air pressure switch to the start of the scale (Fig.
35 on page 33).
 Purge the air from the gas line.
 We recommend using a plastic tube routed outside the build-
ing and to purge air until gas is smelt.
 Fit a U-type pressure gauge (Fig. 24) to the gas pressure
test point on the pipe coupling.
 It is used to calculate approximate MAX burner output using
the diagrams on page 18
 Connect two lights or testers in parallel to the two gas line
solenoid valves VR and VS in order to check the exact
moment at which voltage arrives.
 This operation is not required if each of the two solenoid
valves is equipped with a pilot light that signals voltage pass-
ing through.
 Do not perform any operation on the gas butterfly valve,
which must be closed (index at 0°) with the burner off.
 Do not perform any operation on air damper and combustion
head.
6.3

Burner start-up

Close the remote controls and turn:
As soon as the burner starts, check that the lamps or the testers
connected to the solenoid valves or the warning lights on the so-
lenoid valves indicate no voltage presence.
6.4

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 pres-
sure gauge (Fig. 24).
Once ignition has taken place, proceed with burner global cali-
bration operations.
20148758
Start-up, calibration and operation of the burner
Before starting up the burner, refer to section
"Safety test - with no gas supply" on page 36.
WARNING
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.
CAUTION
D67
If they indicate the presence of voltage, stop the burner immedi-
ately and check the electric connections.
If the burner locks out again, refer to chapter "Flame control lock-
out or emergency stop condition" on page 39.
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
WARNING
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.
26 GB
Fig. 24