Page No 24 of 80 Vapac, Virtuoso VE Humidifier, Installation Manual, EN 2024-01, D301474 Iss 0
I
Electrical supply and connections
The electrical installation MUST
BE carried out by an appropriately
qualified person in accordance with
the current Rules and Regulations
in force.
This appliance must be earthed via
a PE earth connection connected to
the units earth terminal.
The appliance MUST NOT be
operated from a DC supply.
Twin cylinder units have terminals
for the connection of two separate
power supply input circuits (power
supply A and power supply B) to
allow individual circuit protection
of each steam cylinder. For safety
reasons, both cylinder power
supplies should be isolated when
accessing the unit.
Fig 11 - incoming power terminals
A transformer is located within the
control section to provide a 24V AC
output for control purposes. The
transformer has input tappings for
200V, 230V, 380V, 415V and 440V.
Wire TX MUST BE connected to the
input tapping corresponding to
the main incoming supply voltage.
Under normal circumstances Wire
TX is connected to the correct
input tapping at the time of
manuafacture.
The transformer MUST NOT be used
to power other equipment. This
will invalidate the warranty.
Fig 12 - transformer and wire TX
Check that the electrical specification is in
accordance with the specified data on the
humidifier. Ensure that the cross-sectional area
and length of the supply cables is appropriate
for the current supplied.
All electrical connections must be made in
the humidifier control compartment (see the
exploded views in the
technical data section
on pages 8 and 9
). Connections must be in
accordance with the terminal markings and the
wiring diagrams contained in this manual.
The supply line to the humidifier should include
a mains switch / isolator adjacent to the
appliance.
Check that the humidifier is earthed and that an
earth leakage test is carried out.
Ensure that all cables and installers wiring are
appropriately fixed.
Cable glands MUST be used to ensure cables are
held securely at the entry position. All Virtuoso
cabinets are equipped with knock out gland
opening plates which the installing electrician
should remove and trim for the required cable
gland size.
Wire TX
Input tappings
