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Installation diagram of light oil pipes
PLEASE READ CAREFULLY THE “WARNINGS” CHAPTER AT THE BEGINNING OF THIS MANUAL.
Fig. 4 - Double-pipe system
The burner is supplied with filter and flexible hoses, all the parts upstream the filter and downstream the return flexible
hose, must be installed by the customer. As far as the hoses connection, see the related paragraph.
Keys
1. Burner
2. Flexible hoses (fitted)
3. Light oil filter (fitted)
4. Automatic interceptor (*)
5. One-way valve (*)
6. Gate
valve
7. Quick-closing
gate-valve
(outside the tank or boiler rooms)
(*) Only for installations with gravity, siphon or forced circulation feed systems. If the device installed is a solenoid valve,
a timer must be installed to delay the valve closing.
The direct connection of the device without a timer may cause pump breaks.
The pumps that are used can be installed both into single-pipe and double-pipe systems.
Single-pipe system
: a single pipe drives the oil from the tank to the pump’s inlet. Then, from the pump, the pressurised oil
is driven to the nozzle: a part comes out from the nozzle while the othe part goes back to the pump. In this system, the by-
pass plug, if provided, must be removed and the optional return port, on the pump’s body, must be sealed by steel plug and
washer.
Double-pipe system
: as for the single pipe system, a pipe that connects the tank to the pump’s inlet is used besides
another pipe that connects the pump’s return port to the tank, as well. The excess of oil goes back to the tank: this
installation can be considered self-bleeding. If provided, the inside by-pass plug must be installed to avoid air and fuel
passing through the pump.
Burners come out from the factory provided for double-pipe systems. They can be suited for single-pipe system
(recommended in the case of gravity feed) as decribed before.
To change from a 1-pipe system to a 2-pipe-system, insert the by-pass plug G (as for ccw-rotation- referring to the pump
shaft).
Caution
: Changing the direction of rotation, all connections on top and side are reversed.
Bleed
Bleeding in two-pipe operation is automatic: it is assured by a bleed flat on the piston. In one-pipe operation, the plug of a
pressure gauge port must be loosened until the air is evacuated from the system.