Loading ...
Loading ...
Loading ...
BOILER SYSTEM DIAGNOSTICS -Gas Burner Will Not Fire
PROBLEM
POSSIBLE CAUSE
SOLUTION
No arc at the ignition pilot
assembly
Spark gap incorrect
Check the spark gap and reset if necessary. Check for air in the propane line.
Ignition module bad
Check the ignition module and replace if necessary.
Ignition operating properly
Boiler controls malfunctioning
Check boiler controls for good operation and correct problems.
Boiler controls operating
properly
Gas valve malfunctioning
If pilot and boiler controls operate properly, the problem may exist with the gas valve. Replace if
necessary
BOILER SYSTEM DIAGNOSTICS Abnormal
Flame Characteristics - Gas Fired
PROBLEM
POSSIBLE CAUSE
SOLUTION
Flame intermittently lifts and
returns to gas port "candles"
Gas velocity exceeds flame speed
If gas flow is not properly regulated, the regulator may need to be replaced. Gas line may be too
small.
Flame height changes
suddenly
Uneven gas supply pressure
Check orifice for partial blockage. If no blockage found, ensure that the gas supply and regulator
are working properly.
Flame floats around the
combustion chamber
Insufficient air
Check stack for fuel restriction and correct. It may require new ventilation if the original system is
inadequate.
Flame has yellow tip
Flame speed improper
Check for proper gas pressure while burner is operating.
Flame comes out from
under burner housing
Insufficient air and ventilation
Usually occurs at ignition. Check stack for fuel restriction.
Gas burns inside the burner
tube - roars
Burner underrated
Inquire about a burner with the proper rated capacity.
Burner pops when gas is
shut off
Flame travels back into burner
Flame travel when the gas is shut off does not damage the unit.
BOILER SYSTEM DIAGNOSTICS
Water Output Temperature Too Low - Oil or Gas Fired
PROBLEM
POSSIBLE CAUSE
SOLUTION
Burner firing normally but
with outlet temp lower than
rated
Thermostat set too low
Set the thermostat to proper output temperature.
Burner firing constantly
Inlet water too cold
If inlet water is freezing to the touch, the boiler may not be able to reach desired temperature
increase. Use a water supply with a higher temperature.
Sooting
Soot build up on the coil can keep the water from reaching the desired If inlet water is freezing to the
touch, the boiler may not be able to reach the desired temperature increase. Use a water supply
with a higher temperature.temperature.Remove all soot from the coil and check forsmoking.
Scaling
The outlet fitting to the hose can get scale build-up and reduce heat exchange. Descale and
prevent further build-up.
Loading ...
Loading ...
Loading ...