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11
2.5 Two pipe system
This is used where the oil storage tank is
lower than the pump.
Access for the fuel feed to the burner should
be via a suitable tapping made in the top of
the tank, and the fuel feed pipe should
extend to not less than 100mm above the
bottom of the tank.
A none return valve with a metal to metal
seat should be fitted, especially if the return
pipe work is terminated at a level above the
draw off tube. The non- return valve must be
removable for service and maintenance
purposes, and the return pipe from the
pump must therefore be extended down into
the tank to the same level as the suction
pipe.
The presence of a tamper proof isolating
valve fitted within the return pipe is only
required if there is a risk that oil will siphon
out of the tank if the return pipe is
disconnected at the pump during
maintenance or servicing and if the none
return valve has been omitted.
2.6 Pressurised ring main system
This system is used to supply a number of
units from a common storage tank.
A booster pump is used to provide the
pressure to push the oil around the ring
main and back to the tank.
Pressure reducing valves should be fitted on
the delivery pipe to each heater to ensure
that the pressure at the burner pump is less
than
6 psi.
Caution
The internal by-pass plug must be removed
from the burner pump when used in a
pressurised ring main application
.
2.7 Pipe work and fittings
Caution
Galvanised or plastic pipe work and
fittings must not be used. (see BS 5410
Part 1 1997)
All joints must be sealed properly, if
necessary using PTFE tape or other
approved sealing media.
The pipe work must be effectively sealed so
as to prevent the ingress of air.
It is advisable to check all pipe work prior to
installation to ensure that there is no loose
debris or scale present.
Black iron pipes can be hammered to assist
in the removal of these contaminants.
Note
The oil feed to each heater must be fitted
with a fire check valve and isolating valve.
The fire check valve must be operated by
way of a fusible link positioned so that it is
above the burner.
2.8 Electrical supply
Wiring external to the cabinet heater must
be installed in accordance with any local,
national, and European regulations, as well
as meeting the appropriate requirements of
IEE regulations.
The means of connection to the main
electrical supply must allow for complete
electrical isolation of the heater, furthermore,
in the case of a unit wired for a three phase
supply, the supply should only be used to
serve the heater itself and no other plant or
equipment. The position of the isolation
switch must be such that it is adjacent to the
heater and easily accessible at all times. In
addition, the isolator itself must have a
contact separation of not less than 3mm.(as
per BS5991 clause 20.2).
The Control fuse ratings are detailed on the
appliance data plate.
Warning
Ensure that the electric and oil supplies are
turned off before any electrical work is
carried out on the heater.
Ensure that wiring cannot make contact with
any surfaces liable to be subject to high
temperatures or where the insulation of the
Содержание HT2000
Страница 33: ...33 7 0 Wiring Diagrams Wiring Diagram 20 45 604 30 40 ON OFF Riello Burner Integral CP4 230 50 1ph...
Страница 34: ...34 Wiring Diagram 20 45 605 60 85 ON OFF Riello Burner Integral CP4 230 50 1ph...
Страница 35: ...35 Wiring Diagram 20 45 606 120 135 ON OFF Riello Burner Integral CP4 230 50 1ph...
Страница 36: ...36 Wiring Diagram 20 45 607 60 275 ON OFF Riello Burner Integral CP4 415 50 3ph...
Страница 37: ...37 Wiring Diagram 20 45 620 30 40 ON OFF Riello Burner Remote CP4 230 50 1ph...
Страница 38: ...38 Wiring Diagram 20 45 621 60 85 ON OFF Riello Burner Remote CP4 230 50 1ph...
Страница 39: ...39 Wiring Diagram 20 45 622 120 135 ON OFF Riello Burner Remote CP4 230 50 1ph...
Страница 40: ...40 Wiring Diagram 20 45 623 60 275 ON OFF Riello Burner Remote CP4 415 50 3ph...
Страница 41: ...41 Wiring Diagram 20 45 612 30 40 ON OFF Riello Burner No Controls 230 50 1ph...
Страница 42: ...42 Wiring Diagram 20 45 613 60 85 ON OFF Riello Burner No Controls 230 50 1ph...
Страница 43: ...43 Wiring Diagram 20 45 614 120 135 ON OFF Riello Burner No Controls 230 50 1ph...
Страница 44: ...44 Wiring Diagram 20 45 615 60 275 ON OFF Riello Burner No Controls 415 50 3ph...
Страница 45: ...45 Wiring Diagram 20 45 292 HI LOW option Riello Burner CP4 Control...
Страница 51: ...51 9 0 Parts Lists...
Страница 55: ...55 Notes...