Gas Operation - Riello RLS 70 Installation, Use And Maintenance Instructions

8.2

Gas operation

Symbol Problem
The burner does not start
The burner does not
come on and the lockout
appears
The burner starts but
stops at maximum air
damper setting
The burner starts and
P
then goes into lockout
The burner turns on and
then remains in lockout
mode
The burner remains in
pre-purging phase
Faults - Possible causes - Solutions
Probable cause
No electrical power supply
A limit or safety thermostat/pressure switch
open
Control box lockout
Control box fuse interrupted
Incorrect electrical wiring
Defective control box
No gas supply
Mains gas pressure insufficient
Minimum gas pressure switch fails to close
Air pressure switch in operating position
The servomotor contact does not intervene
(closure cam 0°)
Flame simulation
Faulty motor remote control switch
Defective electrical motor
Motor lockout
The servomotor contact does not intervene
(maximum cam opening)
Air pressure switch does not switch owing to lack of air pressure:
Air pressure switch poorly adjusted
Pressure switch pressure point pipe clogged
Poorly adjusted head
Dirty fan
High depression in the furnace
Failure to the flame detection circuit
The servomotor contact does not intervene
(cam minimum)
43 GB
Suggested remedy
Close all switches and check connections
Adjust or replace
Release the control box
Replace it
(2)
Check
Replace
Open the manual valves between meter
and train
Contact your GAS COMPANY
Adjust or replace
Adjust or replace
Adjust the closure cam 0°
or replace the servomotor
Replace the control box
Replace
Replace
Release the thermal relay
Cam adjustment (maximum opening)
or replace the servomotor
Adjust or replace
Clean
Adjust
Clean
Contact our Technical Department
Replace the control box
Cam adjustment (minimum)
or replace the servomotor
20139915