Oil Boiler/Burner Cleaning Instructions - Carrier BW4 Installation, Start-Up, And Operating Instructions Manual

PROCEDURE 2—EXPANSION TANK
As previously noted, this tank may become waterlogged or may receive an excess of air. Frequent automatic opening of relief valve indicates
waterlogging. A high boiler temperature accompanied by unusually low radiation unit temperature (and "knocking") indicates excess air in tank.
To correct either condition, close valve between boiler and tank. Drain tank until it is empty. Check all tank plugs and fittings. Tighten as necessary.
Open valve between boiler and tank. Water will rise to normal height in tank if automatic fill valve is installed, otherwise, manually refill system.
PROCEDURE 3—WATER SYSTEM
If system is to remain out of service during freezing weather, always DRAIN IT completely. Water left in to freeze will crack pipes and/or boiler.
PROCEDURE 4—TANKLESS COIL (OR COVER PLATE) GASKET
The tankless coil gasket should be checked at least twice a year for leakage and replaced if necessary.
1. Shut off all electrical power to boiler/burner and shut off fuel supply.
2. Remove sheet metal smoke pipe from top of boiler. Inspect pipe and chimney for signs of corrosion and deterioration. Clean base of
chimney.
3. Remove top jacket panel (6 screws). Remove 2 screws holding left side jacket panel to rear jacket panel and separate the 2 panels enough
for side jacket panel to slip off the "Z" bars on collector top.
4. Remove 2 brass wing nuts holding flue collector top. Remove top jacket support bracket and 2 "Z" bars and collector top.
5. Check gasket on underside of flue collector and replace as necessary.
6. Remove lower front jacket panel (4 sheet metal screws and 2 cap nuts).
7. Remove oil burner (3 cap screws).
Remove oil burner/fire door assembly (4 hex nuts). This is the recommended method as it allows full access to combustion chamber and
less potential for damage to target wall during cleaning process.
8. Remove burner drawer assembly. Clean any soot accumulations.
9. Replace burner nozzle with exact size and type recommended for use on this boiler.
NOTE: Changing to a different firing rate (other than is recommended) or type of nozzle may change performance of boiler and/or cause a
hazardous condition.
10. Clean electrode assembly and set electrodes as per manufacturer's recommendations. (See Fig. 16 and 20.)
11. Reinstall drawer assembly and check for proper head location as per manufacturer's recommendations. (See Fig. 17, 18, and 19.)
12. Inspect target wall and fire door insulation for cracking and deterioration. If there is any sign of cracking or deterioration, replace before
reassembling boiler.
13. Remove soot from fireside surfaces by brushing diagonally through flue passages. (See Fig. 21.) Care should be taken so as not to damage
target wall with flue brush.

OIL BOILER/BURNER CLEANING INSTRUCTIONS

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Fig. 21—Removing Soot
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