8
4.2.1
General.
WIRING INSTALLATION MUST BE CARRIED OUT BY A COMPETENT ELECTRICIAN, AND IS
SUBJECT TO All LOCAL REGUALTIONS AND STANDARDS THAT MAY PREVAIL.
The main controller MUST be mounted within a ‘burner cabinet’ or similar panel in a designated
‘safe’ area, and MUST be earthed to the overall enclosure to ensure safe and reliable operation;
use the largest cross-sectional area green/yellow earth wire available.
Do not use a green/yellow
conductor for any purpose other than earth.
The metal body of all other component parts MUST
be connected to earth using a green/yellow conductor.
To comply with EMC requirements, the controller and any optional units must be wired using the
specified cable sizes, and screen connections, observing any maximum cable length limitations.
Cabinet designers MUST segregate Line voltage and Extra Low Voltage (ELV) cables within the
burner cabinet, distribution panels and conduits.
The manufacturer of this equipment recommends the use of bootlace ferrules on all wire
ends, as a “best practice”.
Bootlace ferrules
All cabling that operates at more than 50 V must be multi-strand, single core, PVC insulated,
16/0.2 mm (0.5mm
2
), and must meet the requirements of IEC 227 or IEC 225.
For cables carried in conduit, secure all cables at both ends, using a suitable anchorage method in
the cabinet. Ensure that cables, conduit and conduit connections meet the requirements for
hazardous area operation.
No additional cable or conduit entry holes are permitted in the
casing or cover of the actuator.
Connect all signal cable ‘braid’ screens to earth using the screen termination clamps provided on
the controller. Connect all cable screens to earth at the
controller only
, unless stated otherwise.
Where CANbus wiring connects through one device to connect to another, terminals 5 and 6 are
common to maintain screen continuity.
The equipment described in this manual has been tested for compliance to safety directives listed
in the section headed ‘Plant Master specification’. However, after it has been connected to a burner
and other associated controls, it is the responsibility of the installer to make sure the complete
installation meets the requirements of the directives relevant to the particular installation.
