SRB
19
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The set of tree-way automatic switches is supplemented by remote voltage relay, this
providing a safety assembly unit which, in addition to short-term over-current
protection, also reacts to thermal overload (a signal from safety thermostat activates
voltage relay) and in the same moment, interrupts the power supply of all three
phases to the boiler.
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In models EK 06 Smart MONO EU and EK 09 Smart MONO EU phase conductor
is connected to single-pole switch (L1).
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In models EK 06-27 Smart EU phase conductors are connected to three-way switch
(L1, L2, and L3).
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Neutral zero conductor is connected to the adequate clamp with the sign N. The
clamp of the zero conductor is blue in colour.
ATTENTION!
When connecting phase conductors it is mandatory to
tighten well the screw in automatic switches in order to make as better link
as possible between cable and clamps.
DANGER!
If the link between cable and clamp is not tight, there may be
incontrollable heating of the switch and eventually result in breakdown.
NOTE!
Remote voltage relay is connected by the manufacturer and
nothing in additionally connected to it.
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When connecting the voltage cable in the boiler, through any of the chosen sets of
grommets, carefully pull the cable to three-way automatic switches, taking care not
to damage sets of cables inside the boiler.
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Additional equipment shown in the hydraulic scheme is connected as per the wishes
of the user.
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After connecting the voltage cable and/or additional equipment, before closing the
boiler, i.e. before the assembly of the front casing, the set of switches and remote
voltage relay should be lifted to ensure power supply in the boiler.
