SERVICE HINTS
28
Possible Cause
What to do
Thermostat is not set correctly
Reset thermostat above room temperature.
Boiler or Burner may be dirty
Clean all flue passages and the vent pipe. Have burner cleaned and
readjusted.
Burner may not be firing at proper rate Check nozzle size if there is any doubt. Have burner adjusted.
Burner may be short-cycling
Short-cycling (too frequent off and on) of burner will cause sooting. If
boiler and/or burner becomes dirty at frequent intervals, after correcting the
dirty condition also correct the aquastat setting (or othercause of
short-cycling).
Check thermostat heat anticipator and correct setting, if necessary,
per instruction sheet packaged with thermostat.
No power to boiler
Check overcurrent protection. Check to be sure power supply circuit
is ON.
Controls out of adjustments
Reset according to instructions packed with controls.
Circulating pump not running
Check relay operation.
Poor electrical contact.
Check all controls terminals and wire joints.
IF YOUR SYSTEM IS NOT HEATING OR NOT GIVING ENOUGH HEAT . . .
IF BURNER IS NOISY . . .
IF RADIATORS ARE NOISY. . .
HAVE YOUR SERVICE TECHNICIAN CHECK ANY PROBLEM YOU ARE UNABLE TO CORRECT.
You may avoid inconvenience and service calls by checking these points before you call for service.
Possible Cause
What to do
Oil burner fan wheel may be dirty
Clean fan wheel with a stiff brush and cleaning solvent. Readjust oil
burner.
Draft regulator may be stuck
Check to see if vane swings freely. Clean, if vane is struck.
Possible Cause
What to do
Air in the system
Open radiator vents to vent the air. Check expansion tank.
RELIEF VALVE IS LEAKING. . .
Possible Cause
What to do
Dirt on seat
Open valve manually. Allow water to run and clear valve seat.
Water logged expansion tank
Drain tank, see instructions.
