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4.2
GENERAL TROUBLE SHOOTING
SYMPTOM
Thermostat closed, fan does not operate.
Thermostat closed. Fan operates.
No spark.
Thermostat closed. Fan operates. Heater
sparks. After 7 seconds electrode shuts off.
No reignition.
Thermostat closed. Fan and electrode operate.
Ignition occurs. Burner cycles off and will
not recycle.
Thermostat closed. Fan and electrode operate.
Ignition occurs. Burner cycles off. Burner
cycles on.
Loss of heater efficiency.
Radiant tube leaking burnt gases.
Condensation.
Tube Bowing.
Tube corroding.
Visual inspection of burner operation
not possible.
Stack sooting.
Odor or fumes in space.
POSSIBLE CAUSE
1. Blown fuse.
2. Faulty thermostat.
3. Disconnected wire.
4. Faulty fan.
1. Loose or disconnected wire.
2. Box lid or gasket not in place.
3. Plugged pressure switch lines.
4. Plugged or restricted exhaust vent.
5. Faulty pressure switch.
6. Faulty circuit board.
7. Faulty electrode.
1. Closed gas supply.
2. Dirty or resisted orifice.
3. Faulty valve. Disconnected wire.
4. Inlet pressure exceeds 14" W.C.P .
5. Improper electrode gap.
1. No electrical ground.
2. Faulty circuit control.
3. Low gas pressure.
4. Open circuit control connection.
1. Low gas pressure.
2. Baffle improperly positioned.
3. Faulty pressure switch.
4. Restricted flue vent.
5. Improper electrode gap.
1. Low gas pressure.
2. Dirty or restricted orifice.
3. Foreign matter inside burner.
4. Unit cycles on and off.
5. Reflector is sooted and has
lost its reflective ability.
6. Reflector not in place.
7. Clogged fan blower.
1. Loose tube connections.
2. Holes or cracks in radiant tubes.
1. Stack length too long.
2. Light gauge flue stack used.
3. Contaminated combustion air.
1. Insufficient combustion air.
2. Overfired.
3. Contaminated combustion air.
4. Heater unable to expand properly.
1. Contaminated combustion air.
1. Dirty or sooted sight glass.
2. Unit mounted upside down.
1. Insufficient combustion air.
2. Improper gas.
1. Vaporized solvents decomposing
when contacting radiant tubes.
2. Evaporation of oils/solvents at
floor levels.
3. Lift trucks.
4. Loose tube connections.
29
CORRECTIVE ACTION
1. Replace.
2. Replace.
3. Repair.
4. Replace.
1. Repair. as required.
2. Put in place.
3. Clean as necessary.
4. Remove foreign matter.
5. Replace only. Do not adjust.
6. Replace circuit control.
7. Replace.
1. Open all gas connections.
2. Remove and clean with a soft object.
3. Replace or repair.
4. Lower inlet pressure.
5. Confirm gap size is between 3/16" & 1/4".
1. Connect electrical ground to junction box.
2. Replace.
3. Provide required gas pressure.
4. Repair or replace.
1. Provide required gas pressure.
2. Reposition baffle at vent end.
3. Replace.
4. Remove foreign matter.
5. Confirm gap size is between 3/16" & 1/4".
1. Provide required gas pressure.
2. Remove and clean with a soft object.
3. Clean as necessary.
4. Check previous symptom.
5. Clean with aluminum cleaner and
soft wiping colth.
6. Put in place.
7. Clean.
1. Assure that tube is fully inserted into
flared end and properly clamped.
2. Replace.
1. Shorten stack.
2. Minimum of 26 gauge vent pipe required.
3. Provide fresh air inlet duct.
1. Provide 2 sq. in. of free air per
5000 BTUh of input.
2. Check gas pressure and orifice size.
3. Provide fresh air inlet duct.
4. Remount with flexible inlet or vent pipe.
1. Provide fresh air inlet duct.
1. Remove, clean or replace.
2. Mount correctly.
1. Provide 1 sq. in. of free air
for every 5000 BTUh of input.
2. Correct with proper gas input.
1. Address ventilation concerns.
2. Address ventilation concerns.
3. Address ventilation concerns/repairs.
4. Tighten to 50-100 lb.-ft.
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