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3398
6
GB
OIL LINE CONNECTIONS
This burner is shipped with the oil pump set to operate on a single line system.
To operate on a two-line system the by-pass plug must be installed.
NOTE:
Pump pressure must be set at
time of burner start-up.
A pressure gauge is attached
to the PRESSURE PORT (8)
for pressure readings.
All pump port threads are Brit-
ish Parallel Thread design.
Direct connection of NPT
threads to the pump will dam-
age the pump body.
Riello manometers and vacuum
gauges do not require any
adapters, and can be safely
connected to the pump ports.
An NPT (metric) adapter must
be used when connecting other
gauge models.
SINGLE LINE (GRAVITY FEED SYSTEM)
The burner is shipped configured 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 reason, be sure the O-ring (2), is properly seated in the pump cover (1) before
re-attaching the pump cover to the pump housing.
Install the required fitting NPTF to NPT adapter into the pump's SUCTION LINE CONNECTION FITTING on left side
of burner on top.
Attach the required tubing to this fitting. Be sure that the plug in the RETURN LINE CONNECTION FITTING is
tightened securely.
WARNING
Do not operate a single line system with the by-pass plug installed.
Operating a single line system with the by-pass plug installed will result in damage to the pump shaft seal.
1
2
8
7
4
D7521
SINGLE LINE SYSTEM-PIPE LENGTHS
H 3/8” OD 1/2” OD
FT M FT M FT M
1.5 0.5 33 10 65 20
3.0 1.0 65 20 130 40
5.0 1.5 130 40 260 80
6.5 2.0 195 60 325 100
H
P
D7523
ATTENTION:
do not exceed
pipe lengths
indicated in chart!