background image

7

8

With the pump back in position after cleaning, make sure 
the  o-ring  seal  and  capping  ring  are  in  position  on  the 
manifold  then  insert  the  cylinder  into  the  feed  /  drain 
manifold,  pushing  it  down  firmly,  and  reconnect  the 
steam hose.

9

The  electrode  caps  must  be  reconnected  in  accordance 
with  the  details  on  the  collar  supplied  with  the  new 
cylinder  – electrode  N°1  on  the  electrode  nearest  to  the 
white cap.

10

The Vapac unit is supplied with electrode cables routed to 
avoid contact with the door.  After a cylinder exchange it 
is  important  to  replace  the  cables  as  close  as  possible  to 
their original route.

Service and Maintenance

As  the  operation  of  the  MiniVap is  entirely  automatic,  it 
normally requires no attention on a day-to-day basis.  General 
cleaning  and  maintenance  of  the  component  parts  of  the 
MiniVap are  recommended  at  intervals  of  about  one  year  but 
this is largely dependent upon the frequency of its use and the 
quality  of  the  water  supply.    Where  the  MiniVap is  part  of  an 
air-conditioning  system  being  serviced  regularly,  the  MiniVap
should be inspected at the same time.

Steam and Condensate Hoses

The  hoses  used  with  and  in  the  Vapac  should  be  inspected  at 
the  normal  service  visits  as  part  of  normal  maintenance.    At 
the  first  signs  of  deterioration,  a  hose  should  be  removed  and 
replaced.

Feed Valve with Strainer

The  nylon  bodied  solenoid  valve  incorporates  a  small  nylon 
strainer which is a push fit in the ¾” inlet of the valve.  With a 
new  plumbing installation, loose  solid material in the pipework 
could  partially  block  the  strainer  after  start-up.    If, for  this  or 
any  other  reason,  a  restriction  of  the  water  flow  is  suspected 
(outside  supply  pressure  considerations),  it  would  be  possible 
to clean the strainer as follows:

Turn off the water supply to the unit.
Undo the nylon nut connecting the flexible water connection to 
the valve inlet.
The  strainer  can  be  removed  using 
‘long-nosed’  pliers  to  grip the  centre 
flange  provided  on  the  strainer  for 
this purpose.
Withdraw the strainer.
Wash and replace it..
Reconnect pipework.
Turn on water supply.
Reconnect electrical 
supply to allow unit to 
operate.

Note:  Always replace the strainer after cleaning as it 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  cleared  the 
fault can be reset by the following procedure:
Power  the  unit  right  off  using  the local  isolator  (not 
the  unit  on/off  switch),  wait  ten  seconds  then  re-
apply power.

4

Service  the  unit  by  following  the  instructions  within 
the Manual.

Drain Pump

The  pump  should  be  inspected  and  cleaned  regularly.    It  is 
recommended  that  this  be  done  at  each  cylinder  exchange, 
especially in hard water areas.  Failure to keep the pump clear 
and operational will result in reduced cylinder life.

To  remove  the  pump  for  maintenance  purposes,  proceed  as 
follows:

1

Depress  and  hold  the  manual  drain  switch  to  empty  the 
cylinder.    The  pump  ‘sound’  changes  distinctly  once  the 
cylinder is empty.  When this occurs release the switch.

2

Disconnect  unit  electrical  supply  and  follow  the  cylinder 
exchange procedure.

3

If,  due  to  an  electrical  or  mechanical  fault,  the  cylinder 
cannot  be  emptied  by  the  pump it  will  be  possible  to 
drain  most  of  the  water  into  a  bucket  by  disconnecting 
and  lowering  the  top  end  of  the  tube  which  feeds  cold 
water  to  the  cylinder  from  the  fill  cup.    The  remaining 
cold  water  will  run  into  the  base  tray  when  the  pump  is 
withdrawn  from  its  ‘o’  ring  connection  and  /  or  the 
cylinder is lifted out.

4

Ease  the  pump  free  of  the  feed  /  drain  manifold  ‘o’  ring 
connection, slide it fully off its base plate and release the 
connecting tube.

5

To  dismantle  and  re-assemble  pump,  refer  to  diagram 
below.

6

In  operation, the  stainless  steel  shaft  remains  stationary 
whilst  the  rotor  and  impeller  rotate  on  it.    Remove  all 
scale  build-up  on  the  shaft  so  the  impeller  can  rotate 
freely.

7

Ensure  that  the  ‘o’  ring  seal  is  correctly  positioned  when 
fitting  the  inlet  housing  to  the  main  pump  motor  body.  
When  re-assembling,  make  sure  the  brass  spinner  is 
replaced on the shaft in front of the impeller.  A smear of 
multi-purpose  grease should  be applied to the ‘o’ ring so 
that  the  impeller  housing  can  be  rotated  into  position 
without  distorting  the  ‘o’  ring  underneath  it  and  so 
maintain the water seal.

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 ...

Reviews: