Switching Off The Burner; Load Controller Inputs; Final Checks (With Burner Operating) - Riello 908T4 Installation, Use And Maintenance Instructions

7.8

Switching off the burner

Press the switch "ON/OFF" switch to "OFF" (Fig. 163 on
page 50).
Disable the electrical supply. If the burner is off for long periods,
close the manual gas gates.
7.9

Load controller inputs

Selecting the default output analogue source/phases input
with 3 positions (P654)
The following input signals can be selected and managed using
the parameter P654.
• 3 positions phase input (ASZxx.3x feedback potentiometer
necessary/depending on the sequence of the program)
• 0...10 V
7.10

Final checks (with burner operating)

 Open the thermostat/pressure switch TL
 Open the thermostat/pressure switch TS
 Turn the gas maximum pressure switch knob to the mini-
mum end of scale position (where present)
 Turn off the burner and cut off the power
 Disconnect the minimum gas pressure switch connector
 Disconnect the wire of the ionisation probe
Make sure that the mechanical locking systems
on the various adjustment devices are fully tight-
ened.
WARNING
Start-up, calibration and operation of the burner
Press the switch "ON/OFF" switch to "OFF" posi-
tion during the burner post-ventilation phase, the
equipment shuts down after a few seconds (ER-
ROR LOC:83).
WARNING
0...135 
•
• 0...20mA
• 4...20 mA with lockout at I <4 mA (AZL2...: Loc: 60)
NOTE:
For the connections, see the wiring diagrams.

The burner must stop

The burner must stop in lockout

The burner must not start

The burner performs the ignition cycle again
53 GB
Tab. Q
20160576