page no. 16 of 36
OUH
Range Users, Installation & Servicing Instructions Doc Ref M105 issue 5.8 Apr 2020.
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 at high level it is recommended
that a non-return valve is fitted adjacent to the burner to
prevent oil draining back when the burner is not operating.
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 section
1.2 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.
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 heater terminal 8 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.
RIELLO BURNER
FLUE OUTLET
ELECTRICAL BOX
AXIAL FAN
FAN / LIMIT THERMOSTAT
HIGH LIMIT RESET
