19
CHAPTER
7
Maintenance
7.4
Problems and remedies
If the burner does not work properly, first you must:
1 check that the electric connections have been correctly performed;
2 ensure that the fuel is delivered correctly;
3 check that all the adjustment parameters (e.g. boiler water temperature or boiler steam pressure) are correctly set
GAS WORKING
Fault
Possible cause
Recommended remedy
The burner does not start
• No electrical power supply . . . . . . . . . . . . . . . . . . . .Close all switches - Check connec
-
tions
• A limiter or safety control device is open. . . . . . . . . .Adjust or replace
• Flame control lock-out. . . . . . . . . . . . . . . . . . . . . . . .Reset control box
• Control box fuses blown . . . . . . . . . . . . . . . . . . . . . .Replace
• Erroneous electrical connections . . . . . . . . . . . . . . .Check connections
• Defective flame control . . . . . . . . . . . . . . . . . . . . . . .Replace
• No gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Open the manual valves between
meter and train
• Mains gas pressure insufficient. . . . . . . . . . . . . . . . .Contact your GAS COMPANY
• Minimum gas pressure switch fails to close . . . . . . .Adjust or replace
• Air pressure switch in operating position . . . . . . . . .Adjust or replace
The burner does not start and a
function lock out occurs
• Flame simulation. . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace control box
The burner ignites but then
blocks
Air pressure switch inoperative due to insufficient air pressure:
• Air pressure switch adjusted badly . . . . . . . . . . . . . .Adjust or replace
• Pressure switch pressure point pipe blocked . . . . . .Clean
is blocked
• Head wrong adjusted . . . . . . . . . . . . . . . . . . . . . . . .Adjust
The burner starts and then locks
out
• Fault in flame detection circuit . . . . . . . . . . . . . . . . .Replace flame control
After pre-purge and safety time,
the burner goes to lock-out and
the flame does not appear
• The solenoid VR allows little gas through . . . . . . . . .Increase
• Solenoid valves VR or VS fail to open . . . . . . . . . . .Renew the coil or rectifier panel
• Gas pressure too low . . . . . . . . . . . . . . . . . . . . . . . .Increase on the regulator
• Pilot burner does not operate . . . . . . . . . . . . . . . . . .Check
• Defective ignition transformer . . . . . . . . . . . . . . . . .Replace
• Erroneous valve or transformer electrical . . . . . . . .Repeat connections
connections
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . .Replace
• A cock down-line of the gas train is closed . . . . . . . .Open
• Air in pipework . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bleed air
The burner goes to lock-out right
after flame appearance
• The solenoid VR allows little gas through . . . . . . . . .Increase
• Max. gas pressure switch operates. . . . . . . . . . . . . .Adjust or replace
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . .Replace
The burner repeats the starting
cycle without lock out
• Mains gas pressure is near the value to which . . . . .Reduce operating pressure
the min. gas pressure switch gas is adjusted.. . . . . .of minimum gas pressure switch.
The repeated drop in pressure which follows . . . . . .Replace the gas filter cartridge
valve opening causes temporary opening of the
pressure switch itself, the valve immediately
closes and theburner comes to a halt. Pressure
increases again, the pressure switch closes again
and the firing cycle is repeated. The sequence
repeats endlessly. And so on.
Summary of Contents for DB9 LSE C13 TC FS1 A0
Page 2: ......
Page 9: ...7 CAPITOLO 2 Descrizione del bruciatore 2 4 Dimensioni di ingombro Fig 6 20075188 ...
Page 29: ...7 CHAPTER 2 Burner description 2 4 Overall dimensions Fig 6 20075188 ...
Page 49: ...7 第 2 章 燃烧器描述 2 4 外观尺寸 图 6 20075188 ...
Page 65: ...23 1 2 2 3 4 5 2 2 3 6 3 5 5 78 78 5 6 6 6 6 6 6 6 2 5 6 666 ...
