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An Isolation Valve should be placed on the tank side
of the filter, so that the oil supply can be isolated when
servicing is required.
Ensure that the filter is positioned correctly and that it
is easily accessible with sufficient clearance below it
for cleaning or replacing the filter element.
It is vital that all joints are completely oil-tight, leaks
may cause air locks in the fuel supply pipe, and will
almost certainly lead to complaints of oil odour.
Fit the fire valve in the oil line, as detailed in Section 2,
Page 26.
Where the tank position provides a gravity flow of oil
to the burner, THE SINGLE PIPE SYSTEM should
be used. The difference in "head", i.e., the distance
vertically between the pump and the outlet of the tank,
dictates the maximum length of oil supply pipe,
including horizontal and vertical runs (see Section 2).
When the tank outlet is below the level of the burner
fuel pump, THE TWO PIPE SYSTEM MUST BE
USED (See Fig. 17). Here a return line is piped from
the pump back to the tank, finishing at least 150 mm
above the bottom. This section of pipe must end at
the same level in the tank as the suction as to prevent
loss of prime.
The ends of the two pipes should be well separated
so that no sludge is disturbed by the return, and will
not be pulled into the suction pipe. An elbow at the
end of the return will ensure that the discharge is away
from the suction. A non-return valve should be fitted
as close as possible to the tank and at the lowest
available point in the suction line. Avoid having the
bottom of the tank more than 3 m (10') below the burner.
The difference in levels between the pump and the
suction and the return lines in the tank controls the
maximum length of pipe, including horizontal and
vertical runs.
It is necessary to enable the pump to raise the oil out
of the tank. Problems can be encountered, with air
collecting on shut down, if the fuel pump is situated at
the highest point in the system.
Water Connections
Statesman:
Flow and return connections are provided on each side
of the boiler, comprising two high level flow connections
and two low level return connections. Connect the
pipework to the selected connections and blank off
the unused ones, it is always preferable to connect
the flow and return pipe diagonally opposite if at all
possible.
34
Installation & Commissioning
System and Flowsure:
Return connections are provided on each side of the
boiler at low level. A flow connection is provided at
high level at the top rear of the boiler. Connect the
pipework to the selected connections and blank off
the unused ones.
Flowsure+:
A flow connection is provided at high level at the top
rear of the boiler and one return connection is provided
at low level to the left side of the boiler.
Note: If the pipes are to be reduced down from 22
mm, eccentric adaptors should be used to prevent air
being trapped in the boiler, see Fig. 25.
On the Flowsure and Flowsure+, domestic hot and cold
water connections are provided at the top rear of the
boiler.
Caution: On the Flowsure care should be taken if
solder connections are made to the hot water outlet
pipe, disconnect the DHW limit thermostat from the
pipe prior to applying heat.
Filling and Make-Up Loop
On the Flowsure and Flowsure+ the flexible hose
provides the means for initial filling of the system from
the mains supply and also for subsequent make-up. It
is fitted with a double check valve to ensure system
water cannot feed back whilst filling and a shut-off valve
is provided for mains isolation. IT IS IMPORTANT THAT
FILLING IS DONE SLOWLY AND THE HOSE IS
DISCONNECTED WHEN NOT IN USE.
On the System boiler a filling and make-up loop will
need to be provided.
Retarders
There is an access door above the burner,(behind the
expansion vessel on the System, Flowsure and
Flowsure+), remove and check the retarders are sound
and in position.
Most models have three retarders above a baffle plate.
The 45/50 has three retarders only and the 90/110
has six retarders and two baffle plates.
Thermostats
Check that all thermostats are secure in their pockets.
On the 45/50, 50/70, 70/90 and 90/110 models it is
recommended that on fully pumped systems the
boiler stat phial is on the side nearest the flow
outlet. If hot water is by gravity circulation fit the
boiler stat phial on the gravity flow side.
Commission the boiler - See page 36.
Part No. 5102478
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