8
Power Supply Connection
Electrical Connections
The wiring to the Vapac should be done by a
qualified electrician. The external overcurrent
protection and wiring should comply with the
appropriate Regulations and Codes of Practice
.
Important:
Make sure the connection to the primary
Voltage winding of the Vapac transformer matches
the supply Voltage which is to be connected
between Vapac terminals A1 & A2.
A fused disconnect/isolator or MCB should be used
to disconnect the supply from all electrodes
simultaneously.
This must be sized to suit the total maximum
phase/line current of the unit and should be located
adjacent to the Vapac cabinet or within easy reach
and readily accessible.
In Vapac Microvap units terminals 1, 2 and 3 are for
the power supply connections as indicated in the
diagrams below.
Twin cylinder models and single cylinder size 40L
and 60L have terminals for the connection of two
power supply input circuits. On twin cylinder units
this allow individual external protection of each
steam cylinder. Fused disconnect/isolator or MCB
provision must be linked to ensure both 3 phase
supply inputs are disconnected simultaneously.
Cable Entry Provision
Cable glands must be used to ensure cables are
held securely at the entry position. All Vapac
cabinets (sizes 1, 2, 3, 4, 5, 6, 7 & 8) are equipped
with a removable gland-plate. The installing
electrician should remove this and take it to a work-
bench to drill for the required cable gland size.
Vapac Control Circuit Transformer
The internal control circuit of the Vapac unit is
operated at 24Vac - To offset possible Voltage drop
in any external circuit connection, two optional
relays are available. One for the security circuit
which connects across terminals 9 & 10 Pt. No.
1150618 the other is for remote auto stop start
signal which brakes the control signal to terminal 7.
Both relays can be fitted into the microvap unit at
any time and prevent external volt drop interfering
with the 1150601 PCB. Control. As standard the
Vapac Microvap includes a transformer with
alternative primary winding options 200V, 230, 380,
415, and 440V and requires on site adjustment to
match it to the Voltage connected to Vapac
terminals A1 and A2.
The transformer 8V secondary supply is not used.
Important:
The Vapac transformer must
NOT
be
used to power other equipment or the warranty will
be invalidated.
RDU Connection
Vapac terminals 25 & 26 and 27 & 28 are included
to provide a 230Vac electrical supply for the fan
motor in the RDU (Room Distribution Unit) .
Note: The 230Vac at terminals is derived from the
incoming electrical supply to the Vapac. If the local
supply cannot provide 230Vac (example 400V No
Neutral supply) it will be necessary for a transformer
to be fitted in the RDU as indicated below.
FOR FULL ELECTRO-MAGNETIC COMPATIBILITY A NEUTRAL CONNECTION IS REQUIRED FOR ALL
VP UNITS AS INDICATED IN THE CONNECTION DIAGRAMS ON THE FOLLOWING PAGES.
RDU Connection
The three type’s of RDU are for various voltages and phase without neutrals connections that can be made to the Microvap unit. Please
refer to the Microvap connection diagram on the following two pages as to which type of unit is required. On twin cylinder units two fan
circuits as shown below one for each cylinder will be in the RDU unit.
Notes:-
1. All units must have a PE earth connection connected to the units terminal.
2.
Unit with N.A. in the following tables means NOT AVAILABLE there is not a unit available to run at the voltage
and phases shown. Please check that the correct model reference is ordered and installed, for the low or high
voltage required, and at the desired steam output.
3.
These tables give the maximum capacities for each unit at the different voltages. Lower outputs can be provided
using "Output Reduction in the Adjust Menu.
4.
Standard design is for 50 Hz. Supplies. Design for 60 Hz. Also available - 60 Hz. Supply must be specified with
order as standard pump is only 50Hz.
5.
If a maximum KW has been strictly specified which is less than the maximum in the Electrical Data, this must be
specified with order as an alternative Current Set Plug (CSP) will be needed. This is subject to the agreement of
the manufacturer.
6.
For other Voltage electrical supplies, contact the Vapac distributor.
200 – 250 V 1Ph. N + earth
200 – 250 V 2Ph. + earth
380 – 440 V 2Ph. + earth
TRANSFORMER
PRIMARY
380 – 440 V
SECONDARY
210 – 250 V
Summary of Contents for MICROVAP V4
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