| Description |
Comment |
Maintenance Frequency |
| Daily |
Weekly |
Monthly |
Annually |
| Boiler use and sequencing |
Turn off or sequence unnecessary boilers. |
X |
|
|
|
| Overall visual inspection |
Complete overall visual inspection to be sure all equipment is operating and that safety systems are in place. |
X |
|
|
|
| Follow manufacturer's recommended procedures in lubricating all components |
Compare temperatures with tests performed after annual cleaning. |
X |
|
|
|
| Check steam pressure |
Is the variation in steam pressure as expected under different loads? Wet steam may be produced if the pressure drops too fast. |
X |
|
|
|
| Check unstable water level |
Unstable levels can be a sign of contaminates in feedwater, overloading of boiler, or equipment malfunction. |
X |
|
|
|
| Check burner |
Check for proper control and cleanliness. |
X |
|
|
|
| Check motor condition temperatures |
Check for proper function. |
X |
|
|
|
| Check air temperatures in boiler room. |
Temperatures should not exceed or drop below design limits. |
X |
|
|
|
| Boiler blowdown |
Verify the bottom, surface and water column blow downs are occurring and are effective. |
X |
|
|
|
| Boiler logs |
Keep daily logs on:
- Type and amount of fuel used
- Flue gas temperature
- Makeup water volume
- Steam pressure, temperature, and amount generated
Look for variations as a method of fault detection. |
X |
|
|
|
| Check oil filter assemblies |
Check and clean/replace oil filters and strainers. |
X |
|
|
|
| Inspect oil heaters |
Check to ensure that oil is at the proper temperature prior to burning. |
X |
|
|
|
| Check boiler water treatment |
Confirm water treatment system is functioning properly. |
X |
|
|
|
| Check flue gas temperatures and composition |
Measure flue gas composition and temperatures at selected firing positions — recommended O2% and CO2%.
| Fuel |
O2% |
CO2% |
| Natural gas |
1.5 |
10 |
| No. 2 fuel oil |
2.0 |
11.5 |
| No. 6 fuel oil |
2.5 |
12.5 | Note: percentages may vary due to fuel composition variations |
|
X |
|
|
| Check all relief valves |
Check for leaks. |
|
X |
|
|
| Check water level control |
Stop feedwater pump and allow control to stop fuel flow to burner. Do not allow water level to drop below recommended level. |
|
X |
|
|
| Check pilot and burner assemblies |
Clean pilot and burner following manufacturer's guidelines. Examine for mineral or corrosion buildup. |
|
X |
|
|
| Check boiler operating characteristics |
Stop fuel flow and observe flame failure. Start boiler and observe characteristics of flame. |
|
X |
|
|
| Inspect system for water or steam leaks and leakage opportunities |
Look for: leaks, defective valves and traps, corroded piping, and condition of insulation. |
|
X |
|
|
| Inspect all linkages on combustion air dampers and fuel valves |
Check for proper setting and tightness. |
|
X |
|
|
| Inspect boiler for air leaks |
Check damper seals. |
|
X |
|
|
| Check blowdown and water treatment procedures |
Determine if blowdown is adequate to prevent solids buildup. |
|
|
X |
|
| Flue gases |
Measure and compare last month's readings for flue gas composition over entire firing range. |
|
|
X |
|
| Combustion air supply |
Check combustion air inlet to boiler room and boiler to make sure openings are adequate and clean. |
|
|
X |
|
| Check fuel system |
Check pressure gauge, pumps, filters and transfer lines. Clean filters as required. |
|
|
X |
|
| Check belts and packing glands |
Check belts for proper tension. Check packing glands for compression leakage. |
|
|
X |
|
| Check for air leaks |
Check for air leaks around access openings and flame scanner assembly. |
|
|
X |
|
| Check all blower belts |
Check for tightness and minimum slippage. |
|
|
X |
|
| Check all gaskets |
Check gaskets for tight sealing. Replace if they do not provide a tight seal. |
|
|
X |
|
| Inspect boiler insulation |
Inspect all boiler insulation and casings for hot spots. |
|
|
X |
|
| Steam control valves |
Calibrate steam control valves as specified by manufacturer. |
|
|
X |
|
| Pressure reducing or regulating valves |
Check for proper operation. |
|
|
X |
|
| Perform water quality test |
Check water quality for proper chemical balance. |
|
|
X |
|
| Clean waterside surfaces |
Follow manufacturer's recommendation on cleaning and preparing waterside surfaces. |
|
|
|
X |
| Clean fireside |
Follow manufacturer's recommendation on cleaning and preparing fireside surfaces. |
|
|
|
X |
| Inspect and repair refractories on fireside |
Use recommended material and procedures. |
|
|
|
X |
| Relief valve |
Remove and recondition or replace relief valves. |
|
|
|
X |
| Feedwater system |
Clean and recondition feedwater pumps. Clean condensate receivers and deaeration system. |
|
|
|
X |
| Fuel system |
Clean and recondition system pumps, filters, pilot, oil preheaters, oil storage tanks, and other system components. |
|
|
|
X |
| Electrical systems |
Clean all electrical terminals. Check electronic controls and replace any defective parts. |
|
|
|
X |
| Hydraulic and pneumatic valves |
Check operation and repair as necessary. |
|
|
|
X |
| Flue gases |
Make adjustments to ensure optimal flue gas composition. Record composition, firing position, and temperature. |
|
|
|
X |
| Eddy current test |
As required, conduct eddy current test to assess tube wall thickness. |
|
|
|
X |
