14
FUEL CONNECTION
(see also burner instruction book)
These may be three types:
a - pipings for light oil (gas oil);
b - pipings for heavy oil (fuel oil);
c - pipings for gas.
Gas oil pipings
The pipings conveying oil from the tank to the pump and viceversa, must be
made with welded fittings for iron pipings and biconical fittings for copper
ones.
Fuel oil pipings
In this case it is always recommendable to prepare a plant having the day fuel
tank located in the boiler room and the transfer pump between this and the
storage tank. The day fuel tank must be complete with electric and steam
preheater (where possible and convenient), the piping from the day fuel tank
to the burner pump must be insulated and, in the event of heavy fuel oil,
wound with a heat tape.
Special instructions should be requested case by case.
Gas pipings
Connect the maingas network to the burner. For town gas it is advisable to
provide a pressure stabiliser.
CHIMNEY
The chimney is usually made of a sheet steel piping of suitable diameter which
must be taken from the boiler flange to the outside of the room over the top of
the roof. When its height exceeds 12 meter, a draught equaliser should be
provided at the base.
Should several boilers be connected to one chimney, it is important to make
sure that exhausts do not interfere with each other.
STEAM
The steam pipings must have an appropriate diameter PN 16 valves are always
used. The pipes must be insulated and the header must be provided with a
steam trap.
EXHAUSTS
Connect the exhausts to the traps, taking care to make suitable raisers to
avoid sprays.
ELECTRIC LINES
The electric lines are connected to the RST and N terminals of the boiler panel.
The cable section must be suitable to stand the installed electric power.
Check to ensure that the network voltage coincides with the one on the rating-
plate and the wiring diagram.
