Recycle Function If Flame Goes Out During Operation; Restart Function Following Firing Failure; Post-Purging Function; Logging Of Burner Operation Parameters - Riello RX 15 S/PV Typ 900T3 Montage- Und Bedienungsanleitung

4.7

RECYCLE FUNCTION IF FLAME GOES OUT DURING OPERATION

The control box allows a recycle, i.e. complete repetition of the start-up programme, making up to 3 attempts, in
the event the flame goes out during operation.
If the flame goes out again, this will cause the burner to lock out. If there is a new demand for heat during the
recycle, the 3 attempts are reset when the limit thermostat (TL) switches.
4.8

RESTART FUNCTION FOLLOWING FIRING FAILURE

The control box allows the start-up programme to be repeated, making up to 3 attempts, if no flame is formed by
the end of the safety time.
If the flame still fails to appear after the fourth ignition attempt, the burner locks out at the end of the safety time.
4.9 CHECKING MOTOR RPM DURING START-UP (PRE-PURGING + PRE-IGNITION)
AND OPERATION
START-UP: motor operation checked if it exceeds the minimum rpm (520 rpm). If the motor doesn't exceed
the minimum rpm during this stage, the start-up programme is repeated, with up to 3 attempts made.Then
there is a lockout.
OPERATION: motor operation checked if it exceeds the minimum rpm (520 rpm). If the motor doesn't
exceed the minimum rpm during this stage, there is an immediate lockout.
If any recycle attempts are made during start-up, the maximum number of attempts is three. At the fourth repeat
of the start-up programme, an incorrect number of motor rpms will cause a lockout.
4.10

POST-PURGING FUNCTION

Post-purging is a function that keeps air purging on even after the burner switches off. The burner switches off
when the limit thermostat (TL) opens, consequently cutting off the fuel supply to the valves.
To use this function, press the reset button when the limit thermostat (TL) is not switched (BURNER OFF).
Post-purging time can be set to a maximum of 6 minutes, proceeding as follows:
Press and hold the reset button for at least 5 seconds till the LED indicator changes to red.
Set the desired time by pressing the button the appropriate times: once = post-purging for 1 minute.
After 5 seconds the control box automatically shows the minutes set by the red LED blinking: 1 led pulse =
post-purging for 1 minute.
To reset this function, simply press and hold the button for 5 seconds until the LED indicator goes red and
release it without performing any operation, then wait for at least 20 seconds to allow the burner to restart.
If there is a new request for heat during post-purging, post-purging time is halted and a new burner operating
cycle starts when the limit thermostat (TL) switches.
The control box's factory settings are as follows: once = post-purging for 1 minute.
4.11 LOGGING OF BURNER OPERATING PARAMETERS
With this control box, data - i.e. the number of lockouts that have occurred, the type of lockout that has occurred
(just the last one) and the gas valve opening operating time - can be logged even when there is no power
supply. That way, you can determine how much fuel has been consumed during operation. To display these
parameters, it is necessary to connect the software diagnosis kit as described in paragraph (1.2) page 2.
4.12

FUNCTION SETTING PROCEDURE USING RESET BUTTON

Function
control box
Reset
Vi s u a l d i a g n o s t i c s o f l o c k o u t
causes (5.1)
Post-purging (4.9)
Resetting set functions
Resetting operating parameters
3425
Pressing the reset
button
1 to 2 seconds
3 seconds
5 seconds then press
once = 1 minute
5 seconds
5 seconds
11 GB
Possible R reset button
use status
After control box lockout
After control box lockout
With limit thermostat (TL) not
switched (burner off)
With limit thermostat (TL) not
switched (burner off)
With limit thermostat (TL) switched
during pre-purging