7. Contactors or other objects producing strong
electromagnetic fields must not be placed in the
immediate vicinity of the thermostat.
8. Connections should be made according to the circuit
diagrams (see figs 1&2).
Loads over 16 Amps must be controlled via a contactor,
fig. 4. The correct Contactor size depends on the total
load of the heating elements for the zone. Ensure that the
Contactor selected is suitably sized. Some Contactors can
be wired to share the load between contacts, however this
should be confirmed with the manufacturer.
If a number of Contactor/Circuit Breakers are mounted
close together, adequate ventilation space must be
allowed. As the devireg
TM
330 is not equipped with a
separate Earth Terminal, the earthing screen of the
heating cable must be connected to the household Earth.
The 'Cold Tails' from the floor have a center core that
is called the cold tail conductor. This conductor is
surrounded by an earth braid/shield.
