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6.9 INSTALLATION - OIL SUPPLY
TWO PIPE SYSTEMS
Where installation is such that the bottom of the tank is
located below the Diesel burner pump, a two pipe system
is required. Ensure that valves and filters are not fitted in
the return line as this must be unobstructed at all times.
The Diesel burner pump should be set for two pipe
operation as detailed in accompanying Diesel burner
manufacturer’s manual, refer also to burner section of this
manual.
DEAERATOR SINGLE PIPE SYSTEMS
Deaerators should not vent in internal spaces
(see OFTEC book 3)
Where installations normally require a two pipe system
but have long or impractical return line runs, a deaerator
can be used which removes air from a single - pipe - lift
Diesel feed. Higher lift heights can be achieved than are
possible with conventional two pipe systems.
The Diesel burner pump should be set for
two pipe operation.
INDIVIDUAL DEAERATOR INSTRUCTIONS
MUST BE IMPLICITLY FOLLOWED.
FIRE VALVES
A fire valve is an essential part of the Diesel supply system.
It should be capable of cutting off the flow of Diesel
outside the building in the event of a fire starting up
within the boiler. The valve should be located just outside
the building at the point where the Diesel supply line
enters. It must be activated by a remote sensor located
over the burner, but in a position clear of any direct
radiation or excessive heat.
IMPORTANT: Fire Valves should comply with
OFTEC Standards OFS E101.
Fitting of fire valves should comply
with BS 5410 Part 1: 2014 and
OFTEC book 3.
MAGNETIC FILTRATION
Effective permanent magnetic filtration of central heating
systems.
It is recommended at the time of installation of this boiler,
to install a permanent effective magnetic filter on the
return pipework after the last radiator on the central
heating system.
This will maintain maximum operational efficiency and
protect the boiler from the damaging, long-term effects of
“magnetite” (black iron sludge). It is essential that the
filter is sized similar to the return pipework e.g. 22mm
(3/4”) or 28mm (1”). In all circumstances, an effective
magnetic filter must be installed in accordance with the
manufacturer’s instructions.
The recommended minimum filtration rate is 70 µm.
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