Two Line (Lift System) - Riello F15 Installation, Use And Maintenance Instructions

Be sure that the plug in the RETURN PORT (9) is tightened securely.

TWO LINE (LIFT SYSTEM)

D6008
A) If a two line system is required, install the By-pass plug (4) provided. The by-pass plug is installed in the return port
(9) 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 operating 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 line will cause failure of the pump shaft seal. Do not exceed the pipe lengths indicated
in the tables.
To install the by-pass plug:
1) Remove the return plug (9).
2) Install the by-pass plug (4) using the 2.5 mm hexagonal key.
B) Attach the two PIPE CONNECTORS (5) to the pump SUPPLY and pump RETURN PORTS (6 and 9). Attach the
required piping to these two pipe connectors using the NPT/METRIC ADAPTERS that are supplied with the
burner.
WARNING:
- Pipe dope or Teflon tape are NOT to be used on any direct oil connection to the fuel pump.
- The height "P" in Pipe Length charts on page 9 and 10 should not exceed 13 feet (4 m).
- The vacuum should not exceed 11.44 inches of mercury.
IMPORTANT:
An external, appropriately listed and certified oil filter must be placed in the fuel line between the fuel tank
and the burner pump.
HYDRAULIC JACK OPERATION
It is strongly recommended a periodic check of the pump pressure operation (annually or better every six
months, if the burner operation is continuous).
If the value is lower than 1 bar, compared to that one of the initial setting, please check the cleaning of the
DANGER
pump and line filters.
In case the pressure setting was not restorable, please replace the pump, in order to guarantee that the
pump pressure during the pre-purge time is at least 3.7 bar.
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2 LINE (LIFT) SYSTEM - PIPE LENGTHS
H
FT M
0.0 0.0
1.5 0.5
3.0 1.0
5.0 1.5
6.5 2.0
9.5 3.0
11 3.5
NOTE: Do not exceed pipe lengths
indicated in chart.
8
3/8" OD 1/2" OD
FT M FT
115 35 330
100 30 330
80 25 330
65 20 295
50 15 230
25 8 100
20 6 65
GB
M
100
100
100
90
70
30
20