Burnham L7248 Boiler User Manual


 
9
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'31 --- '26
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Figure 10
Figure 9
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TWO-PIPE OIL LINES - For two-pipe systems where
more lift is required, the two-stage fuel unit is
recommended. Tables 2 (single-stage) and 3 (two-stage)
show allowable lift and lengths of 3/8-inch and ½-inch
OD tubing for both suction and return lines. Refer to
Figure 10.
Be sure that all oil line connections are absolutely
airtight.
Check all connections and joints. Flared ttings are
recommended. Do not use compression ttings.
Open the air-bleed valve and start the burner. For clean
bleed, slip a 3/16” ID hose over the end of the bleed
valve and bleed into a container. Continue to bleed for
15 seconds after oil is free of air bubbles. Stop burner
and close valve.