American Standard PFWF071A93ABA Installation Manual page 42

SINGLE LINE (GRAVITY FEED SYSTEM)
A. The burner is shipped confi gured for use in single
line applications. No changes to the oil pump are
required for use in single line applications.
NOTE: If the pump cover (1) is removed for any rea-
son, be sure the O-ring (2), is properly seated in the
pump cover (1) before re-attaching the pump cover to
the pump housing. See Figure 40.
B. Attach the two PIPE CONNECTORS (6) to the
pump SUPPLY and pump RETURN PORTS (5 and
7). Attach the required piping to these two pipe con-
nectors using the NPT/ METRIC ADAPTERS that
are supplied with the burner.
C. Connect the pipe connector to the SUPPLY PORT
(5) of the pump. Attach the NPT adapter to the pipe
connector. Attach the required piping to this pipe
adapter. Be sure that the plug in the RETURN PORT
(7) is tightened securely. See Figure 40. Do not ex-
ceed the pipe lengths indicated in the table 12.
TWO LINE (LIFT SYSTEM)
A. If a two-line system is required, install the By-
pass plug provided. The By-pass plug is installed in
the return port of the pump. A 2.5-mm hexagonal key
provided with the by-pass plug is to be used to install
the plug. DO NOT use an inch size hexagonal key;
damage to the by-pass plug may result. When oper-
ating on a two-line system, supply and return lines
should be the same diameter and both should extend
to the same depth inside the fuel tank. Be sure there
are no air leaks or blockages in the piping system.
Any obstructions in the return will cause failure of
the pump shaft seal. Do not exceed the pipe lengths
indicated in the table 13.
ATTENTION:
Do Not exceed
pipe lengths
indicated in chart!
Figure 41
18-CG03D1-4
42
To install the by-pass plug: (Figure 40)
1) Remove the return plug (7)
2) Install the by-pass plug (4) using the 2.5 mm hex-
agonal key
Table 12
SINGLE LINE SYSTEM-PIPE LENGTHS
H 3/8" OD
FT M FT
1.5 0.5 33.0
3.0 1.0 65.0
5.0 1.5 130.0
6.5 2.0 195.0
Table 13
2 LINE (LIFT) SYSTEM-PIPE LENGTHS
H 3/8" OD
FT M FT
0.0 0.0 115.0
1.5 0.5 100.0
3.0 1.0 80.0
5.0 1.5 65.0
6.5 2.0 50.0
9.5 3.0 25.0
11.0 3.5 20.0
ATTENTION:
Do Not exceed
pipe lengths
indicated in chart!
Figure 42
1/2" OD
M FT M
10.0 65.0 20.0
20.0 130.0 40.0
40.0 260.0 80.0
60.0 325.0 100.0
1/2" OD
M FT M
35.0 330.0 100.0
30.0 330.0 100.0
25.0 330.0 100.0
20.0 295.0 90.0
15.0 230.0 70.0
8.0 100.0 30.0
6.0 65.0 20.0