Priming Pump Operation - Riello RDB4 Installation, Use And Maintenance Instructions

7.5.11 External lock-out indicator
The burner is equipped with an external locking signal function,
i.e. to signal (together with the integrated reset button) a burner
locking alarm.
The control box enables the command of an external lamp
way of the exit (230Vac-0.5Amp max).
7.5.12 Frequency main supply anomaly
During the pre-purge the control-box automatically detects the
value of the frequency of the main supply in the range of 50-
60 Hz, in both cases working times are verified. The LED blinks
to indicate the fault (See "Faults diagnosis - lockouts" on
page 19.).
➤ If the anomaly is present before the heat request or during
the pre-heating phase, the burner will not start up and the
anomaly will be signalled.
➤ If the anomaly is detected during pre-purging, the burner will
remain in the purging phase and the anomaly will be sig-
nalled.
➤ The anomaly is not detected during normal operation, the
burner will remain in that status.
When the anomaly disappears, the burner restarts.
7.5.13 Internal voltage anomaly
The control-box automatically detects if the internal voltage
works correctly. The LED blinks to indicate the fault (See "Faults
diagnosis - lockouts" on page 19.).
➤ If the anomaly is detected during the initialisation phase, the
burner does not start.
➤ If the anomaly is detected after a lock-out the burner does
not start.
➤ If the anomaly is detected after a shut-down test the burner
does not start.
➤ The anomaly is not detected during normal operation, the
burner will remain in that status.
When the anomaly disappears, the burner restarts.
7.6 pump operation
Priming
In the lock-out condition, the burner can be subjected to a pump
purging procedure by activating just the motor for 30 seconds to
purge the air from the piping and the filters of the light oil supply
tubes.
Priming pump activation sequence
The function can only be activated using the remote reset
The remote reset button must be pressed for more than 6s and then released.
If the button is not released, the control box remains in this position, with the LED blinking,
and the burner does not start.
Press the remote reset button and then release it after 3 seconds to activate the pump clean-
ing function.
The fan motor starts up after 2 seconds, and operates for 30 seconds.
At the end of the pump cleaning procedure, the control box returns to the initial lock-out con-
dition.
Electrical system
7.5.14 Reset push-button / Remote reset anomaly
If the reset button or remote reset are faulty or remain pressed for
more than 60 seconds, the anomaly - as long as it is active - is
indicated by the blinking of the LED (See "Faults diagnosis -
lockouts" on page 19.).
by
This anomaly is merely a visualisation.
➤ If the anomaly is detected during pre-purge or safety time,
the burner does not stop and the start-up sequence contin-
ues.
➤ If the anomaly is detected during operation, the burner does
not stop (it goes on operating) but the anomaly signalling is
activated.
➤ If the anomaly is detected in the lock-out position, the anom-
aly signalling is not activated and the burner cannot be reset.
When the anomaly disappears the blinking of the led stops.
7.5.15 Fan motor check
The control-box automatically detects the presence of the fan
motor, if there is a failure the control-box will perform a lock-out.
The LED blinks to indicate the lock-out (See "Faults diagnosis -
lockouts" on page 19.).
7.5.16 Oil-valve check
The control-box automatically detects the presence of the oil-
valve coil, if there is a failure the control-box will perform a lock-
out. The LED blinks to indicate the lock-out (See "Faults diagno-
sis - lockouts" on page 19.).
7.5.17 EEprom check
The control-box automatically detects if EEprom memory of mi-
crocontroller has failed and will perform a lock-out. The LED
blinks to indicate the lock-out (See "Faults diagnosis - lockouts"
on page 19.).
Repeat this function a maximum of 5 times to avoid damaging the
pump.
The priming pump cycle can be deactivated before the end of the
"Priming pump time" (30s) by press the push-button for 1 ÷ 2 sec-
onds.
21 GB
The colour of the LED
button becomes
red
green / orange / red
blinking
green / orange / red
green / orange / red
red
Tab. B
20071933