elco Firebird FB 2 K LN, Instructions Manual, Page: 27 / 64

INSTALLATION
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EN
• One-pipe system (standard)
The pump is supplied for operation with one pipe. The return connection is capped. Inside the
pump, there is a screw with a by-pass washer (10) which allows the fuel to recirculate inside the
pump.
To apply the fuel delivery pipe, proceed as follows:
– remove the plastic cap (12) and screw in the delivery pipe (13) supplied with the burner.
1 - 2
10
11
13
12
Fig. 20
CAUTION
Only approved fuel lines are to be used.
• Two-pipe system (optional)
For two-pipe operation it is necessary to remove the by-pass washer.
To apply the fuel return pipe, proceed as follows:
– remove the cap (14) from the connection and screw in the additional return pipe (15), supplied
with the burner
– unscrew the four screws (17) and remove the cover (16) from the pump
– unscrew screw (11) and remove the by-pass washer (10)
– screw in screw (11) and the cover (16).
1 - 2
10
17
16
11
15
14
Fig. 21
IMPORTANT INFORMATION
There is an intake filter and an oil pressure regulator integrated in the pump. Pressure gauges
for negative pressure (vacuum) measurement must be connected before the equipment is
commissioned.
CAUTION
Before starting the burner, check that the return pipe is open. An eventual obstruction could
damage the pump sealing device.
CAUTION
CAUTION