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SERVICE HINTS
You may avoid inconvenience and service calls by checking these points before you call for service.
Possible Cause
Thermostat is not set correctly
Boiler or Burner may be dirty
Burner may not be firing at
proper rate
Burner may be short-cycling
No power to boiler
Controls out of adjustments
Radiators not heating
Circulating pump not running
Poor electrical contact.
What to do
Reset thermostat above room temperature.
Clean all flue passages and the vent pipe. Have burner cleaned and readjusted.
Check nozzle size if there is any doubt. Have burner adjusted.
Short-cycling (too frequent offand on) of burner will cause sooting. If boiler and!or
burner become dirty at frequent intervals, after correcting the "dirty condition" also
correct the aquastat control setting (or other cause of short- cycling).
Check thermostat heat anticipator and correct setting, if necessary, per instruction
sheet packaged with thermostat.
Check overcurrent protection. Check to be sure power supply circuit is "ON".
Reset according to instructions packed with controls.
Open radiator vents to vent excess air. Check flow control valve (if used). It may be
in closed position.
Check relay operation.
Check all control terminals and wire joints.
Possible Cause 1 What to do
[
Oil burner fan wheeI may be dirty ] Clean fan wheel with a stiffbrush and cleaning solvent. Readjust oil burner.
Draft regulator may be stuck Check to see if vane swings freely. Clean, if vane is stuck.
Possible Cause What to do
Air in the system Open radiator vents to vent the air. Check expansion tank.
Possible Cause What to do
Dirt on seat Open valve manuaIly. Allow water to run and clear valve seat.
Water logged expansion tank Drain tank. see instructions.
HAVE YOUR SERVICE TECHNICIAN CHECK ANY PROBLEM YOU ARE UNABLE TO CORRECT.
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