Burner Start-Up; First Burner Start-Up (Manual Operation) - Riello RX 500 S/PV Modulating Operation

6.4

Burner start-up

The burner can operate in two different modes:
1 manual operation (to be used for the initial start-up): in this
mode the indicators of the display are blinking;
2 Automatic operation (for normal work operation): in this
mode the indicators of the display are fixed;.
6.4.1

First burner start-up (manual operation)

To carry out the first start-up of the burner, make sure that:
– The electrical voltage is available (the display of the control
box must be lit);
– Open the thermostatic chain (T1-T2 of the 7 pole socket) or,
if provided for on the burner, set the "ON-OFF" switch to
"OFF";
– Disconnect the external modulation control (control with 3
points or analogue signal);
– Keep the button "A" pressed together with the button "+" or "-
" > 5 seconds. The display shows OFF blinking.
NOTE:
if no operation is carried out for a time of >30 seconds, LME7
passes automatically to the normal operation mode. Repeat
the above operation.
• Set the "ON/OFF" switch (where provided) to the "ON" posi-
tion and make sure that there is heat request (thermostat
chain closed).
• LME7 starts and carries out a start-up. The device works up
to the end of the P30 pre-purging phase, it is brought to the
starting load and passes to the display of P0 (number of rpm
ignition load). The display passes from P0 to a three-digit
number.
NOTE:
the three-digit number indicates the setting value for the pa-
rameters P0, P1 and P2 as number of revs, and should be
multiplied by 10.
• Pressing the button "A" and the button "+" or "-", it is possible
to change the number of 10 rpm within pre-set limits (P0max,
P0min factory set values).
NOTE:
The setting for parameter P0 should be higher than the value
set for parameter P1. The settings are verified by the LME7.
If the setting rules are violated, the appliance goes into lock-
out mode, signalling a Loc error:225
• Press the "info" button to confirm the value.
• The burner proceeds with the ignition phase (P36-P38-P40).
NOTE:
If at the end of the safety time the flame does not appear, the
burner restarts in automatic mode (it carries out a maximum
of 3 attempts). The indications of the sequence of the phases
on the display continue to blink to signal that we are still in
the start-up procedure (manual operation). If ignition is still
not achieved, it may be that gas is not reaching the combus-
tion head within the safety time period. Turn the minimum
screw of the gas valve slightly towards the "+" sign.
In case of ignition failure after the set attempts, the burner goes
into lockout Loc: 07. Press the "info" button for 1..3 seconds un-
lock the control box.
If the switch remains in the "ON" position (and/or the thermostat-
ic chain is closed) the burner starts again in the standard operat-
ing mode (performs all the Ignition phases normally without
stopping, at the end of the pre-purge time, at the point P0).
20138630
Start-up, calibration and operation of the burner
To return to manual mode, press button "A" together with the "+"
or "-" button > 5 seconds during the pre-purging phase (the value
on the display starts to flash).
• The burner is switched on, the program continues to the min-
imum load position P1. The display passes from P1 to the
number of revolutions expressed with three digits.
• Pressing button "A" and the button "+" or "-", it is possible to
change the number of 10 rpm within pre-set limits (P1max,
P1min factory set values).
• Check the appearance of the flame, if possible, and the value
of the CO and CO2 to understand whether the burner has
been sufficiently calibrated (first maximum calibration). If nec-
essary use the minimum screw of the gas valve (turn to-
wards the "+" sign to increase the gas, towards the "-" sign to
decrease the gas).
• Press the "info" button to confirm the value.
• The burner then goes to the nominal load position P2. The
display passes from P2 to the number of revolutions ex-
pressed with three digits.
• Pressing button "A" and the "+" or "-" button, it is possible to
change the number of 10 rpm within pre-set limits (P2max,
P2min factory set values).
• Check the appearance of the flame, if possible, and the value
of the CO and CO2 to understand whether the burner has
been sufficiently calibrated (first maximum calibration). If nec-
essary use the maximum screw of the gas valve (turn to-
wards the "+" sign to increase the gas, towards the "-" sign to
decrease the gas).
• Press the "info" button to confirm the value.
NOTE:
If the burner switches off before reaching point P2 (e.g. gas
valve too tight, etc.), the burner goes into lockout Loc:07.
Press the "info" button for 1..3 seconds unlock the control
box and proceed as follows:
• Start the burner with automatic operation (displays fixed).
• LME7 starts and carries out a start-up. The appliance per-
forms the pre-purging phase (P30) and the Ignition phases
(P36-P38-P40). Once on, it remains at the Ignition output be-
cause the external modulation command is disconnected
(operation performed in the preliminary phase).
• Perform the manual modulation procedure as shown below.
28 GB