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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

Page 1: ...Failure to observe manufacturer s recommendations may invalidate warranty Vapac Humidity Control Limited reserves the right to change the design or specification of the equipment described in this manual without prior notice Vapac equipment is manufactured in England by Vapac Humidity Control Limited ...

Page 2: ...T install the unit close to sources of strong electro magnetic emissions eg variable speed lift motor drives KVA transformers etc DON T mount unit in an unventilated enclosure DON T mount in a position requiring ladder access to the unit DON T install the unit behind a false ceiling or other situation where an unusual malfunction eg water leak would cause damage DON T install the unit in an area w...

Page 3: ...ean and then re seat it Plumbing Drain Connections DO s DO use copper pipe or plastic pipe rated for 100 C DO arrange to discharge drain water from the unit into a vented and trapped drain at a position where flash steam rising from the drain line tundish will not pose a problem for the Vapac or other equipment DO provide adequate fall for the drain pipework to allow free flow of water drained fro...

Page 4: ...t 22mm Do use Vapac steam hose or well insulated copper pipe Do keep steam hose as short as possible under 2m for maximum efficiency DO arrange to have a vertical rise immediately over the unit of 300mm DO use the full height available between unit and steam nozzle to provide maximum slope min 12 20 for condensate to drain back to the steam cylinder or down to a condensate separator Always provide...

Page 5: ...ical 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...

Page 6: ...onse to extreme fault conditions identified as High Over current STOP Drain Fault STOP no drain function Feed Fault STOP water not reaching cylinder The stop condition on the MiniVap PCB will be cleared by switching the unit off and on When a stop condition occurs follow the service and maintenance procedure to inspect the steam cylinder and the drain pump User LEDs Description 1 OFF Unit in shutd...

Page 7: ...is needed to prevent material lodging in the valve seat or blocking the small flow control restrictor which is fitted in the valve Fault Service Indications Requiring Operator Intervention User LED 1 State Description 1 AMBER Drain fault 2 AMBER flashing 1 second period Feed fault 3 AMBER flashing 2 second period Over current fault 4 GREEN Service now 1 2 3 Fault Stop Once the problem has been cle...

Page 8: ...l cup internal u tube Drain Fault Check drain pump operates check when draining the water runs to drain and doesn t return to the cylinder via the Tundish fill cup blocked internal drain hose or problem with the Tundish fill cup internal u tube Over Current Fault check the unit drains correctly check the cylinder electrodes are not damaged or mis aligned in the cylinder MiniVap Specification Model...

Page 9: ...9 ...

Page 10: ...10 Vapac Humidity Control Ltd Fircroft Way Edenbridge Kent TN8 6EZ Tel 01732 863447 Fax 01732 865658 www eaton williams com INSTALLATION NOTES ...

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