Table 8: Boiler Troubleshooting Guide (Burners Functioning)
Burners not functioning
Burners will not shut
down
Flashback or burning
at orifice spuds
Delayed ignition.
Condensation at boiler
vent connector/fan•
See Figure 26
i Defi,cflve gas valve
2. Short circuit.
1. Manifold gas pressure too low.
2 [mproperly sized/drilled orifice spuds.
3 Leaking gas valve.
4. Burrs on orifice
5. Low supply gas pressure,
1 Insufficient pilot flame.
2. Pilot burner/orifice clogged.
3. Overfiring,
4. Misaligned burners or pilot
1. Vent pipe not sloped towards vent terminal•
See Figure 26
i Use Figure 26 to troubleshoot intermittent
ignition gas valve Replace if necessary.
2 Check and correct wiring
] Adjust to proper pressure
2 Install correct spuds.
3. Replace valve.
4. Remove burrs.
5. Contact gas supplier if natural gas Adjust
regulator if LP gas.
1 Increase pilot gas flow.
2, Clean pilot burner and orifice
3. Reduce rate to input on rating label•
i 4. Realign burners or pilot
i
i
I. Install condensate _'ap per vent manufacturer's
instructions.
2. Slope vent pipe towards vent terminal.
Boiler not heating i
properly, i
i
Fumes or gas odors
1. Underfiring.
2 Limit set too low.
3. Air in system.
4. Circulator malfunctioning.
5. Circulation system clogged
6 Incorrect thermostat heat anticipator setting.
1, Increase rate to input on rating label.
2. Reset limit to higher setting.
3. Vent air from all points in system,
4. Check circulator, replace if necessary.
5. Shut down and cool boiler, drain and flush
system•
6. Adjust heat anticipator.
I Leaks in gas piping or fittings,
2. Leaks in gas service line or meter
3. Obstructed chimney.
4. Obstructed flueways or vent.
5. Draft problem in boiler room.
6. Overfiring.
I Locate and repair or replace
2. Shut down boiler and notiO gas provider.
3. Check, repair and!or clean chimney.
4. Clean flueways or vent and remove obstructions.
5. Check air supply, ventilation and venting system•
7. Reduce rate to input on rating label•
28
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