Operating instructions

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—DIAPHRAGM 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 this condition, replace the diaphragm expansion tank.
PROCEDURE 4—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 5—TANKLESS COIL (OR COVER PLACE) GASKET
The tankless coil gasket should be checked at least twice a year for leakage and replaced if necessary.
PROCEDURE 6—OIL BOILER/BURNER CLEANING INSTRUCTIONS
OIL BOILER CLEANING
1. Shut off all electrical power to the boiler/burner and shut off fuel oil supply.
2. Remove the vent pipe from the top of the boiler. Inspect the pipe and chimney for signs of corrosion and deterioration. Clean out the base
of the chimney. If the vent pipe shows any signs of corrosion or deterioration, replace it immediately. If chimney damage or deterioration
is discovered, contact a competent professional.
3. Remove the top jacket panel screws (5), the brass wing nuts (2) holding the flue collector top, and then the flue collector top. Inspect the
gasket on the underside of the flue collector and replace as necessary.
4. Before beginning to clean the flue passageways, ensure that the combustion chamber blanket is covered. If the blanket is not covered prior
to cleaning, replace the blanket once cleaning is complete.
5. Now with access to the flue passageways, remove the soot from the fireside surfaces by brushing diagonally through the flue passages (see
Fig. 20). Brushing can be made easier by cutting the end of the flue brush off and inserting it into a drill. When brushing, care should be
taken so as not to damage the target wall with the flue brush.
6. Carefully vacuum the soot accumulations from the combustion chamber area, being particularly careful to not damage any of the refectory
or blanket insulation. To gain access to the combustion chamber first double check that the shut off valve on the fuel line is closed and then
disconnect the fuel oil line. Then open the swing door by simply removing the whiz lock nut holding the door shut.
7. Now inspect the target wall, fire door refectory, and combustion chamber blanket (when included) for cracking and deterioration. If there
is any signs of cracking or deterioration, replace the refectory or blanket before reassembling the burner/front plate.
8. Inspect the door’s braided gasket for wear and damage. Replace when necessary with braided gasket or the same material and size. See
repairs parts section of this manual.
9. Now inspect and clean the oil burner.
OIL BURNER CLEANING
NOTE: These are general instructions for cleaning an oil burner. For specifics, consult the burner manufacturer’s instructions
1. Make sure all electrical power to the boiler/burner and the fuel supply to the burner are shut off.
2. With the swing door open, clean any soot accumulations from the end of the burner and if applicable burner head.
3. Remove the burner drawer assembly, clean the electrodes and then reset the electrode spark gap per the manufacturer’s recommendations.
Table 7—Oil Burner Nozzles
UNIT SIZE UNIT CAPACITY
DELEVAN NOZZLE TYPE FOR
BECKETT AFG OIL BURNER
OIL PUMP 100 PSI
DELEVAN NOZZLE TYPE FOR
BECKETT AFII OIL BURNER
OIL PUMP 140 PSI
140
91,000 0.65–70°-B —
105,000 0.75–70°-A 0.65–70°-B
140,000 1.00–70°-A 0.85–60°-B
210
126,000 0.90–60°-W 0.75–70°-B
178,000 1.25–70°-B 1.00–70°-B
210,000 1.50–70°-B 1.25–60°-B
280
168,000 1.20–70°-B —
248,000 1.75–70°-B —
280,000 2.00–70°-B —
Table 8—Recommended Operating Control Settings
OPERATING CONTROL CONTROL SETTING
High Limit
Standing Radiators 180°F
Baseboard and Convectors 200°F
Low Limit (When Used) 140°F
Differential (When Used) 10°F
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