Table 7: Boiler Troubleshooting Guide (Burners Functioning)
Burners not functioning
Buen_rs will nol _hut
lowD
qashback or burning
at orifice spuds
Delayed ignition
Condensation at boiler
vent connector/fan.
Boiler not heating
properly
Fumes or gas odors
Bee Figure 23
i [)eh,_ tire gas valve
2 Short circuit
1 Manifold gas pressure too low
2 Improperly sized!drilled orifice spuds.
3 Leaking gas valve.
4 Burrs on orifice
5 Low supply gas pressure.
I Insufficient pilot flame
2 Pilot burner!orifice clogged
30verhring
4 Misa]igned burners or pilot.
I Vent pipe not sloped towards vent terminal
I Underfirin 9
2 Limit set too low
3 Air in system
4 Circulator malfunctioning
5 Circulation system clogged.
6 Incorrect thermostat heat anticipator setting.
I Leaks in gas piping or fittings
2 Leaks in gas service line or meter.
3 Leaks in venting system
4. Overfiring.
See Figure 23
I Us_, Figm_' 23 to troubleshoot intermitlent
ignition gas valve Replace if necessary
2 Check and correct wiring
1 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
I Increase pi}ot gas flow.
2 Clean pilot burner and orifice
3 Reduce rate to input on rating label
4 Realign burners or pilot
I.
2.
Install condensate trap per vent manufacturer's
instructions
Slope vent pipe towards vent terminal
I 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 Locate and repair or replace
2 Shut down boiler and notify gas provider.
3 Locate and repair or replace
4 Reduce rate to input on rating label
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