Make Final Adjustments - Weil-McLain 94 Series Manual

Boiler manual: • Installation
Make final adjustments
Adjust burner and damper assembly:
1. Lock fl ue damper OPEN (Figure 44).
Make fi nal burner adjustments using combustion test
equipment to assure proper operation. Do not fi re 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 fi re. Heat boiler to design conditions.
4. Using combustion test equipment, adjust burner for:
a. 12% (± ¼%) CO for No. 2 fuel oil, 0 smoke.
2
b. 9 – 10% CO natural gas; CO in fl ue gas not to exceed 50 ppm
2
(0.01%).
c. Flue gas temperature no lower than 330°F.
On some applications, if draft conditions or burner char-
acteristics cause the burner fl 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 fl ame. If this does not work, contact your
boiler supplier or Weil-McLain to obtain an optional
combustion chamber kit (see page 44 for contents).
5. Adjust fl ue collar damper (Figure 44) to ensure 0.1" W.C. positive
pressure at test opening.
6. Tighten screws to secure in position.
7. Plug test opening with 1 ⁄
assembly.
8. Adjust barometric draft control, when used, to design conditions.
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
fl 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 com-
ponents can result, causing substantial property damage.
1. Provide 4" skim piping from tapping to fl oor drain.
2. Raise waterline to midpoint of skim piping.
3. Fire burner to maintain temperature below steaming rate during
skimming process.
4. Feed in water to maintain water level.
5. Cycle burner ON/OFF as needed to prevent rise in steam pressure.
6. Continue skimming until discharge is clear. This may take several
hours.
7. Drain boiler at cleanout tappings.
8. While boiler is warm,
but not hot
full pressure until drain water runs clear.
9. Remove skim piping.
Part No. 550-110-275/1018
• Start-Up
" plug provided with fl ue collar/damper
8
, fl ush all interior surfaces under
• Maintenance • Parts
Figure 44
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
dissolved gases.
14. Stop burner.
15. Check traps and air vents for proper operation.
Check boiler for gas-tight seal:
1. Remove boiler jacket side and top panels.
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 fl ueways.
b. Check gaskets and sealing rope placement.
4. Reinstall all jacket panels.
Flue collar/damper assembly
Test plug
Damper
locking cap
nut
Boiler must be sealed gas-tight to prevent
possible flue gas leakage and carbon
monoxide emissions, resulting in severe
personal injury or death.
The boiler contains ceramic fi ber and
fi berglass 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.
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