LAARS Multi Flue CF-100-3 - Install and Operating Manual - Manual (Page 9)

9
OIL TANKS AND PIPING
IMPORTANT!!
The instructions in this Section are general guidelines. The instructions for the
specific pump installed on the burner that you have purchased should take
precedence over the instructions given below. Read all of the instructions
provided with the burner before continuing with the installation.
A. Miscellaneous Information: If suction and return lines are less than
30 feet in length, 1/2" OD tubing may be used, but never smaller;
however, when the oil line is 30 feet or over, 5/8" OD tubing is
recommended. Where basement oil storage tanks or oil storage tanks
installed above the burner are used, and/or when the oil flows by
gravity to the oil pump, a single-stage fuel unit with a single oil line to
the pump may be used. Avoid as many connections as possible in the
suction line and make up all connections as tightly as possible, using
a good pipe joint compound for oil on all pipe threads. To minimize
the possibility of air leaks, tighten packing gland on any valve installed
in the suction line. Also, be sure to tighten the cover on the oil filter, as
filter gaskets often shrink. Check for kinks in the oil lines as well as for
possible air pockets and for loose connections. Underwriters'
Laboratories requirements now in effect stipulate a bottom outlet on
all 275 gallon oil storage tanks. This is to prevent the accumulation of
condensation, which causes the tank to rust. A water trap can be
installed at the oil storage tank outlet to prevent the water from
entering the burner. There are a number of additives on the market
that can be added to the oil storage tank with the fuel oil. These
additives hold the water in suspension and allow it to pass through the
burner. Consult a local fuel oil dealer for information concerning the
use of these additives.
B. Single Line System: NOT RECOMMENDED WHEN IT IS NECES-
SARY TO LIFT THE OIL. This type of installation is used where the
oil storage tank is above the burner and gravity oil feed to the burner
is permitted. The oil outlet and the line should be taken from the
bottom of the tank. This line should have a gradual slope downward of
approximately 112" per linear foot or more to a point directly below
where it is connected to the burner. A shut-off valve should be
installed in the line.
C. Two Line System: If oil storage is buried or if a suction line is long, it
is recommended that a two-stage fuel unit with a two line (suction and
return) installation be installed. For Suntec (Sunstrand) fuel units,
insert the bypass plug through the return port and turn tight. For
Webster pumps, bypass plug comes installed.