page no. 25 of 48
LNVx Range Users, Installation & Servicing Instructions Doc Ref M104 issue 1.0 Sep 2018.
Warning: THIS APPLIANCE MUST BE
EARTHED.
Warning: Lockout reset is by a switched
Neutral to the controls in the heater.
Warning: Wiring external to the unit must be
carried out by an appropriately qualified
person to current IEE regulations for
Electrical Installations and any local regulations which
apply.
The local 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. Wiring should be completed in
flexible conduit.
The local electrical supply conditions must be compatible
with the electrical data given on the appliance data plate.
Heaters are for use with 230V, 1N, 50Hz supplies.
The method of connection to the main electricity supply
must:-
- facilitate the complete electrical isolation of the
heater(s) via a suitable fused isolator that will prevent
remote activation of the heater during servicing (see
section 2.4.5 for ratings).
- be in a readily accessible position adjacent to the
heater(s).
- serve only the heater(s).
- have a contact separation of at least 3mm in all poles.
See section 2.5 or the accompanying wiring diagram for
the heater electrical connections.
All units, (with the exception of units supplied with a
centrifugal fan/silencer duct section) are fully prewired
and only require final connections for the incoming mains
supply and completion of the control circuit (230V).
Reference must be made to Section 2.4.5 to ascertain
the electrical loading of the unit(s) being installed 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.
Models supplied with a centrifugal fan/silencer duct
section require wiring to be completed between the
heater and fan. Refer to supplied wiring diagram.
Warning:
LNVx 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. Refer to
supplied wiring diagram.
Note: To achieve maximum system efficiency it
is recommended that LNVx units are controlled
by an MC200 or MC300 unit.
Simple room thermostat and thermostat/time clock
control systems will not provide optimum system
efficiency and fuel savings.
Wiring drawings and instructions are supplied with the
respective controller.
Key:
Mains supply
= 2 core and earth
MC200 Controller
= 8 core and earth
alt. MC300 Controller
= 6 core sc LNE
Optional MC200 sensor = Screened 2 core*
* (screen must be grounded only at the MC200, See
instructions supplied with controller for wiring sizing,
Max. 100m)
Fused
Isolator
Controller
(MC200 shown)
Remote Sensor
(optional)
230V
Supply
Typical wiring
installation