24 July 2003
including Change 1, Jan 2004 and Change 2, March 2005
Table F-2 Hot Water Boilers PMI Checklist
1. Observe condition of flame. Correct if flame is smoky or if burner starts with a
puff. Flame should not impinge on the furnace walls.
2. Check fuel supply (oil). Note level of oil in tank. Leaking tanks must be repaired
or replaced immediately.
3. Observe operation of circulating pumps. Lubricate pump motor, bearing
assembly, and flex coupling. Noisy pump motors require repair or replacement.
4. Test flame detection devices and associated automatic fuel cutoff valves. Loss
of flame should shut off flow of fuel to the burner(s). Replace or repair if devices or
valves are found defective.
5. Inspect fuel supply systems and piping in boilers for leaks, loss of insulation, etc.
Repair or replace as needed. Replace cartridges for in-line oil filters. Adjust oil
pressure as prescribed by the manufacturer. Ensure both oil supply and return
lines have a fusible in-line valve.
6. Check boiler room drains for proper functioning.
7. Check condition of safety relief valves. Test valve with tri-lever. Valves should
preferably be the pressure and temperature type. Leaking safety valves must be
replaced. No obstructions such as another valve, long pipe length, or constriction
are permissible between the boiler and the safety valve. The overflow from the
valve should be free of obstructions and piped to within 4 inches of the floor or to a
8. Inspect burner assembly. Evidence of improper fuel nozzle wear, plugging, or
carbon buildup on the nozzle is cause for replacement. Adjust equipment for proper
combustion after replacing the old nozzle with a new one.
9. Inspect burner assembly. Replace nozzle and filters on oil burning equipment.
Clean, check, and adjust electrodes.
10. Inspect internal and external heating surfaces after cleaning. Fireside surfaces
should be free of soot. Cracked surfaces will require repair or replacement of the
furnace (firing chamber). Repair to pressure parts requires a certified welder.
Evidence of bulges or other deformities indicates defective controls and safety
devices or improperly sized and adjusted burner. Consult a boiler water treatment
specialist if there is evidence of hard scale on the waterside surfaces
11. Inspect gas piping and valves regularly for proper support and tightness. Test
for tightness with a soap solution, never a flame. If a leak is detected, then secure
piping to the boiler and contact the gas company.
12. Check transformer. Do not interchange transformers of different capacities