Operation; Notes On Safety For The First Start-Up; Adjustments Prior To Ignition; Burner Start-Up - Riello RX 360 S/PV Modulating Operation

6

Operation

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
6.2

Adjustments prior to ignition

The following adjustments must be carried out:
 open the manual valves upline of the gas train;
 bleed the air from the gas pipes using the screw on the
socket P1)(Fig. 19 on page 22).
6.3

Burner start-up

Close the thermostat and switch on the burner's power.
The burner starts up in pre-purging mode at maximum speed.
Then reduce the value of the "START" speed and start the igni-
tion.
If, however, the fan starts up but at the end of the safety time the
flame does not appear, burner goes into lockout mode.
6.4

Fan adjustment

Modulation is based on variable-speed technology. Combustion
air delivery can be adjusted by varying the motor's speed (rpm).
The proportioning gas train delivers the right amount of fuel, de-
pending on the pressure detected in the purging circuit.
6.5

Gas valve adjustment

The adjustment of the gas output is achieved by using the two
screws V1 and V2 (Fig. 19 on page 22).
To alter the maximum output of gas use screw V1:
 To increase the output: turn the screw anticlockwise
(unscrew);
 to reduce the output: turn the screw clockwise (tighten).
To alter the minimum output of gas act on the screw V2 on the
gas valve.
 Remove the protection screw and act on the intern screws
with a hex key
6.6

Burner adjustment

The optimum adjustment of the burner requires an analysis of
flue gases at the generator outlet. In conformity with EN 676, the
burner application at the generator, the adjustment and the test-
ing must be carried out in compliance with the instruction manual
of the generator itself, including the control of the CO and CO
concentration in the flue gases and of their temperature.
Operation
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
Before starting up the burner, refer to section
See "Safety test - with no gas supply" on
page 28.
WARNING
Reset and wait for a new start-up attempt.
If the burner still does not fire, the problem may be that gas is not
reaching the combustion head within the 3-second safety time.
Turn the screw V1)(Fig. 19 on page 22) on the gas valve mixer
slightly anticlockwise.
Once the burner has fired, now proceed with global calibration
operations.
Hence the output delivered is adjusted by varying the motor's
speed of rotation.
The speed of the motor can be adjusted by means of three "Trim-
mers" (see Fig. 22 on page 26).
– To increase the output: turn the screw clockwise (tight-
en);
– To reduce the output: turn the screw anticlockwise (un-
screw).
Definition of the adjustments for the fan.
The adjustments are carried out by means on three potentiome-
ters on board of the motor control box
START determines the air during the start-up phase
MIN determines the minimum modulation
MAX determines the maximum modulation
Check in sequence:
– MAX output;
– MIN output;
– ignition output.
2
25 GB
20068189