PB Heat MI User Manual download pdf (Page 31)

TROUBLESHOOTING

Table 8.1: Boiler Troubleshooting Guide

PROBLEM POSSIBLE CAUSES CORRECTIVE ACTIONS

1. No power.

2. Limit (Aquastat) not working.

3. Flame rollout switch open.

4. Blocked vent switch open.

5. Gas off at boiler gas valve.

6. Gas off external to boiler.

7. Plugged orifice spuds.

8. Defective gas valve.

9. Improper wiring.

10. Vent damper malfunctioning.

Burners not functioning.

1. Check line voltage wiring and fuses.

2. Check wiring and contacts, relay, temperature

setting. Clean and adjust as necessary.

3. Replace switch. Locate cause and correct.

4. Reset blocked vent switch. Locate cause and correct.

5. Start boiler using Lighting/Operating

Instructions.

6. Check any gas valves in the line.

7. Check, clean and re-install.

8. Use Figure 8.1 to troubleshoot intermittent

ignition gas valve. Replace if necessary.

9. Check and correct in accordance with wiring

diagrams in Section 6.

10. Refer to vent damper manufacturer’s instructions.

Replace if necessary.

1. Defective gas valve.

2. Short circuit.

Burners will not shut

down.

1. Use Figure 8.1 to troubleshoot intermittent

ignition gas valve. Replace if necessary.

2. Check and correct wiring.

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.

6. Excessive downdraft or draft problems in

boiler room.

Flashback or burning

at orifice spuds.

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.

6. Check air supply, ventilation and venting

system.

1. Insufficient pilot flame.

2. Pilot burner/orifice clogged.

3. Overfiring.

4. Misaligned burners or pilot.

5. Draft problem in boiler room.

Delayed ignition.

1. Increase pilot gas flow.

2. Clean pilot burner and orifice.

3. Reduce rate to input on rating label.

4. Realign burners or pilot.

5. Check air supply, ventilation and venting

system.

1. Underfiring.

2. Limit (Aquastat) set too low.

3. Vent pipe too long.

4. Inadequate chimney or venting system.

Excessive condensation in

vent.

1. Increase rate to input on rating label.

2. Reset aquastat to higher setting.

3. Reposition boiler to reduce length.

4. Check chimney and venting recommendations.

1. Underfiring.

2. Limit set too low.

3. Air in system.

4. Circulator malfunctioning.

5. Circulation system clogged.

6. Incorrect thermostat heat anticipator setting.

Boiler not heating

properly.

1. Increase rate to input on rating label.

2. Reset aquastat 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.

1. Leaks in gas piping or fittings.

2. Leaks in gas service line or meter.

3. Obstructed chimney.

4. Obstructed flueways or vent.

5. Undersized chimney or vent, high draft loss

in vent.

6. Draft problem in boiler room.

7. Overfiring.

8. Vent damper malfunctioning.

Fumes or gas odors

1. Locate and repair or replace.

2. Shut down boiler and notify gas provider.

3. Check, repair and/or clean chimney.

4. Clean flueways or vent and remove obstructions.

5. Check National Fuel Gas Code and vent

manufacturer’s recommendations.

6. Check air supply, ventilation and venting system.

7. Reduce rate to input on rating label.

8. Refer to vent damper manufacturer’s instructions.

Replace if necessary.

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 42 43

Comments to this Manuals

No comments

PB Heat MI User Manual Page 31

Comments to this Manuals

Related products and manuals for Water heaters & boilers PB Heat MI