5
MiniVap Electrical Connections
The wiring to the Vapac should be done by a qualified
electrician and the external over-current protection and wiring
should comply with the appropriate Regulations and Codes of
practice. The standard MiniVap unit is designed to suit 230V
single phase electrical supply.
External Protection
A fused disconnect / isolator or MCB should be used in the
electrical supply to the unit and this should be located adjacent
to the Vapac cabinet or within easy reach and readily
accessible.
MiniVap Terminals (see Fig.1)
Terminals L1 and L2 are for the power supply connections.
Terminals 1 and 2 are for the external control circuit
connections.
Terminals A and B are for connection of an RDU (Room
Distribution Unit).
Control Circuit Connection
The MiniVap can be operated by a single step humidistat /
hygrostat which has volt-free contacts.
Note:
MiniVap terminals 1 & 2 must NOT be used for
security circuit purposes.
Security Circuit
When a high limit humidistat, interlock or airflow switch are in
use, these should be wired to interrupt the power supply to the
MiniVap unit either indirectly or directly.
Cable Entry
Cable glands are provided and must be used to ensure cables
are held securely at the entry position.
Output Reduction
There are two standard outputs; LMV2 = 2kg/hr and LMV4 =
4kg/hr. Both units can have their outputs changed from
1kg/hr to 5kg/hr by changing the value of UCP 1. If this is
required, please request change from manufacturer or
distributor supplier of the unit, or at time of order.
Making the Electrical Connection
Releasing the Electrical Section:
To make the electrical connections to the
unit it is necessary to detach the electrical
section. To do this, open the door,
disconnect the hose and the electrode caps
from the steam cylinder, then remove the
steam cylinder from the cabinet by lifting it
out of the manifold.
Next undo and remove the two screws
which hold the electrical panel to the outer
cabinet (see Fig.2) and ease the whole
electrical section forward (see Fig.3) to
disengage it from the locating slots in the
back panel.
Then undo the two holding screws to
release it from its top and bottom runner.
The electrical panel is then free and can be
rested at an angle within the cabinet (see
Fig.4) to allow the wiring connections to be
made to the terminal block.
Completing the Connection:
Remove the knock-outs in the top and/or side (for
MiniVap with RDU) and fit the glands provided.
Pass the cables through the cable glands and
make secure connections to the appropriate
positions of the terminal block then tighten the
cable glands.
Note: If an RDU is fitted, there is a small knock-out
on the top and a hard plastic grommet provided for
the fan motor leads.
On completion, re-attach the electrical panel to its
runners, slide it back and secure in position before
replacing and reconnecting the steam cylinder.
Important:
1
When replacing the cylinder, make sure its o-
ring seal and capping ring are in position on
the manifold.
2
The position for the white cap (water level
sensing electrode) has
a label marked
‘white’, the electrode cable N° 1 must be put
on the electrode nearest the white cap.
To gain access to the electrical section open front door; undo these
2 screws then ease electrical section out and release it by undoing
the two guide screws.
Fig 2. Fig 3
A
B
L1
L2
1
2
220-240V
50 / 60 Hz
R.D.U.
PE
External Connections
Power
C
o
n
tr
o
l
- +
DC Signal
On / Off
Humidistat
Fig 1
Summary of Contents for MiniVap LMV2
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