Copyright Pyroban Ltd. Issue 1 Page 19 of 32
Part number PM1083ENG
Relay Unit
5. Mount the Relay Unit Bracket to suitable location.
The Relay Unit should be fixed to the bracket by its
four mounting holes in the plastic moulding using M5
Cap Head screws with spring washers.
6. Allow reasonable access to remove the cover for
fuse replacement.
7. The enclosure may be mounted on a horizontal or
vertical surface, but the cable glands should not be
facing upwards in order to prevent the
ingress of water.
System Connection
8. Refer to the installation diagram for connections and best practice.
9. The Relay unit is supplied in two voltage versions
•
815859/12V for use with 12V vehicles
•
815859 for use with 24V to 80V vehicles
Warning
- Use of 815859/12V on voltages above 12V will result in permanent damage to
the Relay unit.
Note: The 12V version brings in a voltage boost circuit to compensate for voltage drop
caused by engine cranking. Use of 815859 on a 12V system may result in system reset
when the engine is cranked.
Supply should be taken from a suitable point closest to the battery using the supplied fuse
holder and 5amp fuse.
The Isolator Switch should be installed in a suitable accessible position.
10. A 2-core x 1.5mm
2
cable is supplied for the power and
shutdown relay wiring.
If a replacement cable is used, this must be rated for the
maximum system voltage with a minimum 8A current
rating taking into account the ambient temperature.