Service Hints - UTICA BOILERS UHSW Series 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
Circulating pump not running
Poor electrical contact
Chimney flue is blocked
Rollout switch blown
POSSIBLE CAUSE
Gas input amount is incorrect
POSSIBLE CAUSE
Dirt on seat
Water logged expansion tank
HAVE YOUR SERVICE TECHNICIAN CHECK ANY PROBLEM YOU

SERVICE HINTS

!
CAUTION
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire
department.
WHAT TO DO
Reset thermostat
Check flame. If it is yellow, the burner is not getting enough air. Or, if
flame is blue and noisy and seems to lift off the burner, the burner is
getting too much air. Contact your service technician.
Check over-current protection. Check to be sure electric power supply
circuit is "ON".
Reset according to instructions.
Open radiator vents to excess air. Check flow control valve (if used). It
may be in closed position.
Check over-current protection. Check relay operation.
Check all control terminals and wire joints.
Pressure switch will not close and pilot spark will not operate to start
pilot. Have your service technician check and correct, if necessary.
Have your service technician check heat exchanger for blockage. Replace
rollout switch with exact replacement.
IF BURNER IS NOISY . . .
WHAT TO DO
Contact your service technician.
RELIEF VALVE LEAKING . . .
WHAT TO DO
Open valve manually. Allow water to run and clear valve seat.
Drain tank, see manufacturer instructions.
ARE UNABLE TO CORRECT.
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PN 240012689 Rev. A [05/15/2019]