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When sizing the connection lines, observe
that the supply impendance must be low! If a
short circuit occurs the circuit-breaker must
switch off automatically within 0.4 s. The
magnetic short circuit trigger for the circuit-
breaker (type B) responds immediately when
the flowing short circuit current is more than
five times the rated current.
8.3 Safety (interlock) system
Across terminals 1 and 2 on terminal block
X1, the so called safety (interlock) system is
attached. The safety (interlock) system
allows for the wiring in of safety devices. With
an open safety interlock, the nozzle system
LPS does not commence or ceases opera-
tion.
Integration of a max. hygrostat into the safety
interlock is state-of-the-art. The max.
hygrostat serves as a safety element in case
of malfunction of the humidity sensor and
protects against over-humidification. Further
interlock contacts, such as from air flow
relays, duct pressure switches, ventilator
interlocks etc., are to be serially wired into
the safety (interlock) system across terminals
1 and 2 of X1.
The contacts across terminals 1 and 2 of X1
must be potential-free and suitable for 230
VAC switching.
After commisioning the HygroMatik nozzle
system LPS, a voltage of 230 VAC is present
on terminal 1 of ST1.1 on the expansion
board (wired to terminal 1 of terminal block
X1).
If the ventilation system fails or the supply air
face velocity is too low (less than 0.9 m/s) the
site monitoring must switch off the nozzle
system via the safety interlock. Otherwise
undesired condensate build-up behind the
aerosol separator may occur.
8.4 Inspecting the electrical
installation
The electrical installation must be checked by
an electrician in accordance with customer
requirements and the regulations set out by
the public electricity supply company:
Does the mains voltage match the
voltage specified on the nameplate /
delivery note?
Have all electrical connections been
carried out according to the connec-
tion diagrams?
Have all electrical screw and plug
cable connectors been attached
properly?
Are the switch-off conditions for pro-
tection in case of faults complied
with?
Has the system been earthed?
The system can then be switched on.
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