Vapac VapaLite LMV2, Manual

5 

 
VapaLite 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 VapaLite 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. 
 
VapaLite 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 VapaLite can be operated by a single step humidistat / 
hygrostat which has volt-free contacts or external dc controller 
giving 0-5V; 0-10V; 2-10V; 1-18V; 0-20V or 4-20mA. 
Notes:  Control input must be specified at time of order. 

VapaLite 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 
VapaLite 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 
VapaLite 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

Con

tro

l

-       +

DC Signal

On / Off

Humidistat

Fig 1