Single Line System; By-Pass Plug Installation - Riello R35 Series Installation Manual

OIL LINE CONNECTIONS
NOTE: The oil line connections to the pump should be made only after all electrical
connections are complete and the electrical enclosure has been replaced.
The burner is shipped from the factory with the pump set for a single line system. To operate
on a two-line system, the BY-PASS PLUG must be installed.
Refer to FIG. 12
1) Inlet Port (1/4" NPTF)
2) Return Port Plug (1/4" NPTF)
3) Bleeder Valve & Pressure
Gauge Port (1/8
thread)
4) Pressure Adjustment Screw
5) Vacuum Gauge
parallel thread)
6) By-pass Plug
7) Nozzle Outlet Port

BY-PASS PLUG INSTALLATION

A) Remove return port plug (2).
B) Insert by-pass plug and tighten in place using (3/32") Allen key.
C) The return line can now be connected to the pump using a ¼" NPTF fitting.
SINGLE LINE (GRAVITY FEED) SYSTEM
Oil line connection to the inlet port (1) of the pump, can be made using a ¼" NPTF fitting. Be
sure that the return port plug (2) is tightened securely. Do not exceed the pipe lengths
indicated in the table in FIG. 13.

SINGLE LINE SYSTEM

PIPE LENGTHS
H 3/8" OD
Feet Meters Feet
1.5 0.5 33
3.0 1.0 65
5.0 1.5 130
6.5 2.0 195
NOTE: Do not exceed pipe lengths indicated in
chart.
WARNING: Height "P" should not exceed 13 Feet (4 m)
parallel
Port (1/8
2
½" OD
Meters Feet Meters
10 65 20
20 130 40
40 260 80
60 325 100
5
1
6
3 4
FIG. 13
11
7
FIG.12
P
H