Riello ER Series Installation, Use And Maintenance Instructions page 50

GAS OPERATION
Problem
The burner does not start
The burner does not come on
and the lockout appears.
The burner turns on and then
stops in lockout mode
The burner turns on and then
remains in lockout mode
Once the pre-purging and the
safety time has elapsed the
burner goes into lockout without
the flame appearing
It goes into lockout with
appearance of flame
The burner continues to repeat
the start up cycle without lockout
Burner stops in lockout during
operation.
Lockout when the burner stops
Firing with pulses
24
Possible cause
• No power supply. Turn off switches . . . . . . . . . . . . .Check wiring
• A limit or safety remote control open . . . . . . . . . . . .Adjust it or replace it
• Flame control lockout . . . . . . . . . . . . . . . . . . . . . . . .Rest
• Control box fuse broken . . . . . . . . . . . . . . . . . . . . . .Replace it
• Electrical connections wrong . . . . . . . . . . . . . . . . . .Correct them
• Defective flame control . . . . . . . . . . . . . . . . . . . . . . .Replace it
• There is no gas . . . . . . . . . . . . . . . . . . . . . . . . . . . .Open the manual valves between
• Gas pressure in the network is not high enough . . .Contact the GAS COMPANY
• Min. gas pressure switch does not close . . . . . . . . .Regulate it or replace it
• Air pressure switch in operating position . . . . . . . . .Adjust it or replace it
• Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace the control box
Air pressure switch does not switch owing to lack of air pressure:
• Air pressure switch is badly adjusted . . . . . . . . . . . .Adjust it or replace it
• Pressure socket tube of the pressure switch clogged Clean it
• Head badly adjusted . . . . . . . . . . . . . . . . . . . . . . . .Adjust it properly
• Malfunction in the flame detection circuit . . . . . . . . .Replace the flame control
• The VR solenoid lets too little gas through . . . . . . . .Increase it
• The VR or VS solenoid valve does not open . . . . . .Replace the coil or the rectifier panel
• Gas pressure too low . . . . . . . . . . . . . . . . . . . . . . . .Increase it on the adjuster
• The burner's pilot is not functioning . . . . . . . . . . . . .Check
• Firing transformer defective . . . . . . . . . . . . . . . . . . .Replace it
• Valve or firing transformer connections not current . .Redo them
• Defective flame control . . . . . . . . . . . . . . . . . . . . . . .Replace it
• A valve up line from the gas train is closed . . . . . . .Open it
• Air in the pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bleed it
• The VR solenoid lets too little gas through . . . . . . . .Increase it
• Max. gas pressure switch cut in . . . . . . . . . . . . . . . .Regulate it or replace it
• Defective flame control . . . . . . . . . . . . . . . . . . . . . . .Replace it
• The gas pressure in the network is near the value .Reduce the cut in pressure of the
on which the min. gas pressure switch is adjusted .min. gas pressure switch
The sudden fall in pressure that follows . . . . . . . . . .Replace the gas filter cartridge
the opening of the valve causes the temporary
opening of the pressure switch itself immediately
the valve closes and the burner stops. The
pressure starts to increase again. The pressure
switch closes and repeats the start up cycle.
And so on.
• Air pressure switch faulty . . . . . . . . . . . . . . . . . . . . .Replace it
• Max. gas pressure switch cuts in . . . . . . . . . . . . . . .Adjust it or replace it
• Permanence of the flame in the head of . . . . . . . . . Eliminate the continuation of the
combustion simulation of flame
• Head badly adjusted . . . . . . . . . . . . . . . . . . . . . . . .Adjust it properly
• Fan air damper badly adjusted, too much air . . . . . .Adjust it
• Firing output too high . . . . . . . . . . . . . . . . . . . . . . . .Reduce it
6
CHAPTER
Recommended remedy
the contactor and the gas train
flame or replace control box
Maintenance