Burnham LE L7248 User Manual
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B
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 fittings are
recommended. Do not use compression fittings.
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.