6
The flue terminal must not be installed so as to be less than:
- 300mm below an opening e.g. window, air brick etc.
- 200mm below eaves or gutter.
- 300mm from an internal or external corner.
- 1200mm from a surface facing the terminal.
- 1500mm vertically from another terminal on the same wall.
- 300mm horizontally from another terminal on the same wall.
- 2000mm from ground level.
4.3.3 Installation of Flue System
4.4 Oil Connection
The oil pipework length and diameter should be in accordance
with the information given in the burner instruction booklet.
The pump suction should not exceed 0.4 bar.
The oil line must terminate not more than 450mm from the
burner with the final connection by the flexible hoses supplied
with the burner.
Because the burner is firing downward it is recommended that
an additional oil solenoid valve (available as an optional extra)
is fitted adjacent to the burner, and wired as shown in Section
8
(Page 9)
, to eliminate any possibility of syphoning through
the burner.
4.5 Electrical Connections
All units are fully prewired and only require final connection
of the incoming mains supply and completion of the control
circuit (230V) via a room thermostat, time clock etc.
All units must be earthed. The electrical supply must be run to
a point adjacent to the heater and be suitably terminated to
provide an isolation point that will prevent remote activation
of the unit during servicing. See Table 3
(Page 3)
to ascertain
the electrical loading of the unit(s) so that cables of adequate
cross-sectional area are used for the electrical installation. The
length of the conductors between the cord anchorage and the
terminals must be such that the current carrying conductors
become taut before the earth conductor if the cable or cord slips
out of the cord anchorage. All external controls must be of an
approved type.
See the wiring diagram in Section 8
(Page 9)
.
OUH/D models supplied less fan must be electrically interlocked
to the air movement system so that this is started in the same
manner as the air heater fan would be viz. A connection from
the heater terminal marked “Live Main Fan” must be made to
one side of the fan motor contactor coil, the other side of the
coil being connected to Neutral. The fan motor electrical supply
must be direct and not taken from the internal wiring of the
OUH heater.
