Service Hints - Dunkirk PSB-3D Installation, Operation & Maintenance Manual

You may avoid inconvenience and service calls by checking these points before you call for service.
IF YOUR SYSTEM IS NOT HEATING OR NOT GIVING ENOUGH HEAT . . .
Possible Cause
Thermostat is not set correctly
Burner is not operating properly
No electric power to boiler
Controls out of adjustment
Radiators not heating
Poor electrical contact
Rollout switch blown
Chimney fl ue is blocked
Vent damper not operating
Gas input amount is incorrect
Not enough ventilation
Chimney fl ue is blocked
Air in system
Dirt on seat
HAVE YOUR SERVICE TECHNICIAN CHECK ANY PROBLEM YOU ARE UNABLE TO CORRECT.

SERVICE HINTS

FOR YOUR SAFETY
WHAT TO DO IF YOU SMELL GAS
1. Do Not try to light any appliance.
2. Do not touch any electric switch, do not use the
phone.
3. Leave the building immediately, then call your
gas supplier.
4. If you cannot reach the gas supplier, call the fi re
department.
Reset thermostat above room temperature.
Check fl ame. If it is yellow, the burner is not getting enough air.
Or, if fl ame is blue and noisy and seems to lift off the burner, the burner is
getting too mush air. Contact your service technician
Check over current protection. Check to be sure electric power supply
circuit is "ON".
Reset according to instructions.
Steam air vents not operting properly. Check fl ow control valve (if used) - may be
in closed position.
Check all control terminals and wire joints.
Have your service technician check heat exchanger for blockage.
Spill switch contacts open, requiring manual reset of spill switch. Have your service
technician check and correct chimney problem.
Consult troubleshooting guide, packaged with vent damper.
IF BURNER IS NOISY . . .
Contact your service technician.
IF WALLS OR WINDOWS SWEAT . . .
Contact your service technician
Have your service technician check and correct, if necessary
IF RADIATORS ARE NOISY . . .
refer to "Radiators Not Heating" above
SAFETY VALVE LEAKING . . .
Open valve manually. Allow steam to blow and clear valve seat.
What to do
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