Ambi-Rad OFSU70 Instruções de instalação, colocação em funcionamento e manutenção - Página 6

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3 Installation

Suspended Installation
The heater units can be suspended from the
ceiling by means of 4 eye hooks (not
supplied) please see diagram opposite,
droprods, using steel chains or cable.
Oil type and supply
1
Oil supply connection RC
/
4
thread). Heaters are supplied as single pipe
units for operating on 35 sec gas oil (visc
1.5E @ 20˚C) although 28 seconds, Kerosene
is available on request. Oil supply lines
should be sized to ensure that the required
flow rate at the burner is achieved at all
times. Insulate external pipework and use
winter grade fuel to reduce the potential of
freezing.
If a ring main is used, the pressure must be
below 0.45bar to avoid aeration and possible
air locks. Use pressure regulating valves as
appropriate. Where the tank is sited below
the height of the heater it is advisable to fit
a de-aerater. It is recommended that
isolation valves are provided to facilitate
servicing.
Oil storage tanks must be installed outside
the building in accordance with regulations
in force.
The flexible oil line must be used for the
final connection to the burner to allow for
any expansion or movement of the heater.
A fire valve (operating temperature 70˚C)
must be utilised to protect each heater. The
shut off valve should be sited externally to
the building. (BS5410-1 and BS5410 Part 2).
Note The heater is supplied for single-pipe
operation, Two-pipe systems require a
modification to the pump. For information
on this, please refer to the burner manual.
Oil supply lines
There are three methods of connecting the
oil supply
• Gravity fed/Siphon systems
• Burner lift systems
• Additional oil pump or oil lifter
With any Single Pipe installations using a
Gravity fed/Siphon system, care must be
taken not to undersize or oversize the
pipework which may lead to incorrect
pressure at the pump. Refer to your
4
1
(
/
BSP ext
4
supplier for guidance on pipe diameters.
A maximum of 0.45bar vacuum can be
obtained at the pump. Refer to burner
manual for test point location.
On single-pipe lift systems, a maximum
height of 1.5m between the foot valve and
the pump is recommended based on the
following chart. Do not exceed the stated
diameter.
As there will always be a separation of
air/gas in the system when insufficient
pressure occurs, we recommended the use
of a de-aerator (eg. Tigerloop) to allow these
gasses to escape.
On Two-Pipe systems, it is recommended
not to exceed 3.5m between the foot valve
and the pump. The maximum allowable
pipe length vs. internal pipe diameter can be
calculated from the tables shown in Figures
1, 2 and 3 on pages 5 and 6. Do not exceed
the stated diameter(s).
On installations where the lift is greater
than 3.5m, or pipe runs are longer than
shown overleaf, or there are more than one
heater on the same system, an oil pump
system or an oil lifter system may be
required. For examples of these systems,
please refer to Fig 3-6 shown on pages 6
and 7.
Note Lengths stated within the tables shown
in this manual, take into account resistance
H
(m)
Ø4mm
0
26
0.5
23
1
20
1.5
17
Copper pipe length (m)
Ø 5mm
63
56
48
41
values for all isolating and fire valves,
external filters and up to four 90˚elbows. If
additional bends are required use swept
bends and not a tight elbows, this will help to
reduce the resistance in the system. Refer to
manufactures/suppliers data for resistance
values for additional components.
Maximum pressure at the pump is 2bar
(30psi).
Note These notes are for guidance only and
it is the contractors responsibility to ensure
any pipework and/or ancillary components
that are used are adequate for the
installation.
Typical installation diagrams are shown on
pages 5, 6, and 7. These are for guidance
only and reference should be made to
BS5410-1 and BS5410 Part 2 for further
information.
Ø 6mm
100
100
100
84