Weil-McLain 88 Make final adjustments, Adjust burner and damper assembly, Skim steam boilers

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Make final adjustments

Adjust burner and damper assembly:

1. Lock flue damper OPEN (Figure 49).

Make final burner adjustments using combustion test equipment to assure proper operation. Do not fire boiler without water. Sections will overheat, damaging boiler and resulting in severe property damage.

2.Refer to burner manual for start-up and service.

3.Let burner advance to high fire. Heat boiler to design conditions.

4.Using combustion test equipment, adjust burner for:

a.12% (± ¼%) CO2 for No. 2 fuel oil, 0 smoke.

b.9 – 10% CO2 natural gas; CO in flue gas not to exceed 50 ppm (0.01%).

c.Flue gas temperature no lower than 330°F.

On some applications, if draft conditions or burner char- acteristics cause the burner flame pattern to impinge on the combustion chamber wall, you may notice pinging sounds from the boiler. Adjust the burner if possible to redirect the flame. If this does not work, contact your boiler supplier or Weil-McLain to obtain an optional combustion chamber kit (see page 38 for contents).

5.Adjust flue collar damper (Figure 49) to ensure 0.1" W.C. positive pressure at test opening.

6.Tighten screws to secure in position.

7.Plug test opening with 1/8" plug provided with flue collar/damper assembly.

8.Adjust barometric draft control, when used, to design condi- tions.

9.Repeat steps 4 through 6. Adjust as required.

Skim steam boilers:

Clean all newly installed steam boilers to remove oil. Failure to properly clean can result in violent water level fluctuations, water passing into steam mains, or high maintenance costs on strainers, traps and vents. Skim boiler only. Do not clean old piping or leaks can occur.

Do not use petroleum-based cleaning or sealing com- pounds in boiler system. Severe damage to system components can result, causing substantial property damage.

1.Remove 2" plug from skim tapping tapping "A" (see Fig- ure 38, page 27).

2.Provide 2" skim piping from tapping to floor drain.

3.Raise waterline to midpoint of skim piping.

4.Fire burner to maintain temperature below steaming rate during skimming process.

5.Feed in water to maintain water level.

6.Cycle burner ON/OFF as needed to prevent rise in steam pres- sure.

7.Continue skimming until discharge is clear. This may take several hours.

Part No. 550-100-068/0308

Figure 49 Flue collar/damper assembly

8.Drain boiler.

9.While boiler is warm, but not hot, flush all inte- rior surfaces under full pressure until drain water runs clear.

10.Remove skim piping.

11.Re-insert plug at boiler skim tapping.

12.Close drain cock.

13.Fill with fresh water to normal water line.

14.Start burner and steam for 15 minutes to remove dissolved gases.

15.Stop burner.

16.Check traps and air vents for proper operation.

Check boiler for gas-tight seal:

Boiler must be sealed gas-tight to prevent possible flue gas leakage and carbon monoxide emissions, resulting in severe personal injury or death.

1. Remove boiler jacket side and top panels.

The boiler contains ceramic fiber and fiberglass materials. Use care when han- dling these materials per instructions on page 38 of this manual. Failure to comply could result in severe personal injury.

2.Start burner. Observe all sealing points and chalk mark any not gas-tight.

3.To seal all chalk-marked areas:

a.Use silicone sealant on section flueways.

b.Check gaskets and sealing rope placement.

4.Reinstall all jacket panels.

33