Boiler manual: • Installation • Start-Up • Maintenance • Parts
33Part No. 550-100-068/0308
Make final adjustments
Flue collar/damper assembly
Adjust burner and damper assembly:
Lock ue damper OPEN (1. 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.
Refer to burner manual for start-up and service.2.
Let burner advance to high fire. Heat boiler to design conditions.3.
Using combustion test equipment, adjust burner for:4.
12% (± ¼%) COa.
2
for No. 2 fuel oil, 0 smoke.
9 – 10% COb.
2
natural gas; CO in ue gas not to exceed 50 ppm
(0.01%).
c.
On some applications, if draft conditions or burner char-
acteristics cause the burner ame pattern to impinge on
the combustion chamber wall, you may notice pinging
sounds from the boiler. Adjust the burner if possible to
redirect the ame. If this does not work, contact your
boiler supplier or Weil-McLain to obtain an optional
combustion chamber kit (see page 38 for contents).
Adjust ue collar damper (5. Figure 49) to ensure 0.1" W.C. positive
pressure at test opening.
Tighten screws to secure in position.6.
Plug test opening with 1/8" plug provided with ue collar/damper 7.
assembly.
Adjust barometric draft control, when used, to design condi-8.
tions.
Repeat steps 4 through 6. Adjust as required.9.
Skim steam boilers:
Clean all newly installed steam boilers to remove oil.
Failure to properly clean can result in violent water level
uctuations, 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.
Remove 2" plug from skim tapping tapping "1.
A" (see Fig-
ure 38, page 27).
Provide 2" skim piping from tapping to oor drain.2.
Raise waterline to midpoint of skim piping.3.
Fire burner to maintain temperature below steaming rate during 4.
skimming process.
Feed in water to maintain water level.5.
Cycle burner ON/OFF as needed to prevent rise in steam pres-6.
sure.
Continue skimming until discharge is clear. This may take several 7.
hours.
Drain boiler.8.
While boiler is warm, 9.
, ush all inte-
rior surfaces under full pressure until drain water
runs clear.
Remove skim piping.10.
Re-insert plug at boiler skim tapping.11.
Close drain cock.12.
Fill with fresh water to normal water line.13.
Start burner and steam for 15 minutes to remove 14.
dissolved gases.
Stop burner.15.
Check traps and air vents for proper operation.16.
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.
Remove boiler jacket side and top panels.1.
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.
Start burner. Observe all sealing points and chalk 2.
mark any not gas-tight.
To seal all chalk-marked areas:3.
Use silicone sealant on section ueways.a.
Check gaskets and sealing rope placement.b.
Reinstall all jacket panels.4.
