Certikin COH110, Operating, Installation And Servicing Instruction

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It should be completed with the following:
1. Sludge Cock - on steel tanks.
2. Outlet Valve.
3. Contents Indicator.
4. Hinged Fill and Vent Cover or a separate Fill
connection and Vent. The Fill and Vent should
be suitably capped to prevent ingress of
water or fitted with return bends
4:7.2 Steel Tanks
Tanks should be mounted on suitable supports, if
these are of brick or blocks, a damp proof membrane
should be inserted between the tank and its sup-
ports.
Tanks should slope 20 mm per metre of length down-
wards from the Oil Outlet to the Sludge Cock situ-
ated at the opposite end.
4:7.3 Plastic Oil Tanks
.
Tanks made from plastic are now available. These
should be UV stabilized for protection against sun-
light, and coloured green. Plastic tanks do not need
to stand on piers, but should be supported across
the entire base area, ideally on 50 mm thick garden
slabs or a concrete base. As there is only one tapped
outlet they are more suited to single pipe feed as
gravity supply or with a 3K Oil Loop Deaerator where
suction lift is required. (Part No. BS 03060)
4:8 OIL SUPPLY
The oil connection points on the Heater casing are
shown in the diagram
Fig 7:2c
in Section 7 of this
manual.
All joints in the Oil Lines must be oil tight and the Oil
Line should be flushed clean before connecting to
the burner.
Note that no soldered joints are per-
missible in the oil line.
4:8.1 Oil Filter
An Oil Filter is provided with the Heater. Connec-
tions are ¼ BSP Female, see Fig. 4:8b, 4:8c, 4:8d,
4:8e, 4:8f, 4:8g.
It is essential for reliable operation that the Oil Filter
is fitted in the Oil Pipe supplying Oil from the Tank to
the Burner.
It is a condition of the guarantee that
the Filter is fitted correctly.
4:8.2 Fire Check Valve (Not Supplied)
A 90°C Fire Valve must be fitted in the suction line
see BS 5410: Part 1.
The valve must be fitted external to the Heater, pref-
erably at point where the Oil Pipe enters the build-
ing. The sensor should be located above the Burner
in the clip provided, see Figs. 4:8a, 4:8b, 4:8d & 4:8f.
The entry point for the Fire Valve Sensor is shown
on Fig. 4:8a & Fig 7:2c.
To ensure the casing seal is maintained, always pass
the Sensor through the blind grommet (supplied), it
will be necessary to cut across the diaphragm.
4:8.3 Single Pipe System Fig. 4:8b
If the bottom of the Oil Tank is above the Burner,
install a 10mm copper supply pipe to the Burner in-
corporating the correct Filter, Shut Off Valve and Fire
Check Valve.
Ensure that the Burner Oil Pump is correctly set for
‘Single Pipe’ operation. (
See section 4:8.2
)
4:8.4 Two Pipe System Fig. 4:8d
When the bottom of the Oil Tank is below the level of
the Oil Pump on the Burner it is necessary to install
an additional 10 mm return pipe.
The Oil Filter, Shut Off Valve, spring loaded Non-
Return Valve and Fire Check Valve are always in the
suction line supplying oil from the Tank to the Burner.
The Non-Return Valve must be fitted to allow the flow
in the correct direction and prevent drain back to the
Tank, see Fig. 4:8e.
Ensure that Valves are NOT fitted in the Return Line.
The Return Line must be unobstructed at all times.
Ensure that the Burner Oil Pump is correctly set for
‘Two Pipe’ operation.
(See section 4:8.1)
4:8.5 Deaerator Oil Pipe System Fig. 4:8f
An alternative two pipe arrangement can be achieved
using a 3K Oil Loop Deaerator which removes the
air from the oil feed on a single pipe lift. The Burner
Pump is piped to the Deaerator, which should be
positioned close to the burner, but NOT inside the
Heater Case.
A Non-Return Valve is not required in the return
line.
The advantage of this system is gained where a two
pipe run from the oil supply tank is long or difficult to
achieve.
3K Deaerators are available as an optional extra from
your merchant (Part No. BS 03060).
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