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M-WRG-K  

Installation manual 

M-WRG-S 
 

 

Meltem Wärmerückgewinnung GmbH & Co.KG 

Am Hartholz 4     D-82239 Alling     [email protected]     www.meltem.com

  

Important user information

   

Ventilation with heat recovery

 

With the decentralized ventilation system M-WRG with 
heat recovery from Meltem you have acquired a high 
quality product. This ventilation system serves you as 
an improvement for your home and your health as well 
as  a  protective  measure  against  moisture  and  mold 
damages in your home. 
 
Ventilation by opening windows, especially during cold 
seasons, belongs to the past. From now on, fresh and 
filtered air is supplied fully automated. The stale air is 
extracted  and  its  warmth  transferred  to  the  fresh  air, 
via the heat exchanger.  While doing so, the M-WRG 
ventilation  units  have  minimum  power  consumption. 
You  save  heating  costs,  increase  the  comfort  of  your 
home and at the same time reduce the impact on the 
environment by reducing CO2 emissions. 
Of  course  you  still  may  open  your  windows  - 
especially during warmer days. 
 
A  family  of  four  produces  daily  an  average  of  10-14 
liters  of  moisture,  due  to  cooking,  laundry,  personal 
hygiene,  and  breathing  of  inhabitants,  plants  and 
animals!  This  excessive  amount  of  moisture,  within 
the  interior  air,  is  extracted  through  the  M-WRG 
ventilation  unit  and  therefore  prevents  the  forming  of 
mold and resulting damages in the building structure. 
At  the  same  time,  fumes  from  floors,  furniture  and  a 
too high CO2 concentration in the air, which can lead 
to fatigue and health issues, will be extracted from the 
interior rooms and replaced by fresh and clean air.  

 

Directions for correct usage  

Please  read  this  manual  carefully  and  follow  the 
instructions  contained  in  this  manual.  Additionally, 
familiarize yourself with the operations of the M-WRG 
ventilation unit, as well as please pay attention to the 
warnings and cautions contained in this manual. 
 

  Never operate the M-WRG ventilation unit without 

filters.  Only  with  the  original  filters  from  Meltem, 
the  units  will  remain  clean,  fully  operative,  and 
have a long lifespan. 

 

  The M-WRG ventilation unit may only be operated 

once installed correctly. 

 

  When  ventilating  basements  or  similar  rooms  we 

advise  to  be  cautious  (especially  during  the 
summer  season  and  warm  weather),  due  to  the 
fact  that  the  moisture  in  the  air  will  condense  on 
cold  interior  walls  and  -  despite  ventilation  - 
moisture  damages  can  occur.  Therefore,  please 
only  ventilate  at  night  during  warm  weather 
seasons! If you would like to ventilate such rooms 
with an M-WRG ventilation system, please consult 
with the manufacturer prior to purchase. 

 
 
 
 

  Never cover the M-WRG ventilation unit or any part 

of  it  with  e.g.  cabinets,  blinds  or  curtains.  A 
minimum  distance  of  30  cm  to  any  furniture  is 
required, in order for the M-WRG ventilation unit to 
remain fully operable. 

 

  The M-WRG ventilation unit has been designed for 

continuous  operation  and  a  long  lifespan.  During 
cold  seasons,  the  M-WRG  ventilation  unit  should 
be  operated  continuously.  The  energy  saving 
motors  and  innovative  electronics  guarantee  – 
despite  continuous  operation-  for  a  low  power 
consumption  (approx.  3.8  Watt  at  level  1).  Only  a 
continuous  operation  achieves  a  permanent 
extraction  of  moisture  and  condensation.  If  this 
does  not  occur,  it  is  possible  that  condensate  will 
gather in the unit. 

 

  If  a  high  concentration  of  moisture  occurs,  we 

recommend  regularly  ventilating  the  room  at  the 
highest ventilation level for 10 minutes, in order to 
eliminate  any  possible  condensation  inside  the 
unit. 

 

 

In  order  to  guarantee  a  smooth  operation, 
especially  during  low  exterior  temperatures 
(below  -5°C),  you  should  avoid  interior 
temperatures below 15°C. 

 
Caution:  In  case  of  exterior  temperatures  below 
0°C, icicles may form at the façade covers. These 
should be removed for safety purposes. 

 

Maintenance and Filter replacement 

The  unit  automatically  monitors  the  filter  status.  An 
acoustic  warning  signal  will  inform  you,  when  the 
filters need to be replaced.

 

  

However,  for  hygienic  reasons,  it  is  strongly 
recommended  to  replace  the  filters  at  least  once 
per year, ideally before the heating season.

 

For  a  reliable  operation  of  the  units  and  for  your 
own  safety,  only  original  and  certified  parts  from 
Meltem  should  be  used.  Otherwise  this  may  void 
the warranty and Meltem will not be liable for any 
damages.  
 

We  hope  you  will  enjoy  your  new  M-WRG  home 
ventilation system with heat recovery!

 

 
 
 

 

 

Summary of Contents for M-WRG-K

Page 1: ...tem Wärmerückgewinnung GmbH Co KG Am Hartholz 4 D 82239 Alling info meltem com www meltem com Order Nr 5300 10 01 06 2011 HOME VENTILATION WITH HEAT RECOVERY Ventilation Units M WRG K M WRG S Surface mount Installation Flush mount Installation ...

Page 2: ...nly be operated once installed correctly When ventilating basements or similar rooms we advise to be cautious especially during the summer season and warm weather due to the fact that the moisture in the air will condense on cold interior walls and despite ventilation moisture damages can occur Therefore please only ventilate at night during warm weather seasons If you would like to ventilate such...

Page 3: ...3 1 General information 7 3 2 Choose a location for the surface mount installation 7 3 3 Dimensions 8 3 4 Determine installation location with the drilling template 8 3 5 Cut a channel for the power cord 9 3 6 Drilling 9 3 7 Insert ventilation pipes 9 3 8 Install the power cord 10 3 9 Resurfacing 10 3 10 Cut ventilation pipes 10 4 Preparations for the flush mount installation UP 11 4 1 Prepare mou...

Page 4: ...t into the interior of a cabinet or other furniture Do not cover the M WRG ventilation unit with any type of fabric towel curtains etc or any other objects furniture blinds etc Please follow the instructions contained in this user manual Please follow the maintenance instructions contained in this user manual Observe the VDE safety regulations all national regulations in the country of use as well...

Page 5: ...e safety regulations i e FeuVo have to be met Before operating the M WRG ventilation unit the installation has to be discussed and approved by the responsible official authorities and the chimney sweeper The M WRG ventilation units are only allowed to be installed in living environments with open fireplaces if 1 A simultaneous operation of open fireplaces that use liquid or gaseous fuel and the ve...

Page 6: ...gauges 4 dowels Ø8mm 1 User manual 1 Installation manual 2 2 M WRG K packaging contents Ventilation unit with heat recovery comfort edition 1 M WRG ventilation unit Remote control 2 ventilation pipes DN100 4 flat washers 4 screws for the surface mount installation Ø5x120mm 4 screws for the flush mount installation Ø5x100mm 4 centering gauges 4 dowels Ø8mm 1 User manual 1 Installation manual 2 3 Op...

Page 7: ...elow the ceiling A minimum distance of 150mm to the ceiling is required It is also necessary that the unit has a distance of minimum 50mm to adjacent objects or surfaces Furnishing After the M WRG ventilation unit has been installed please note that the unit may not be covered or obstructed by furniture curtains or other items Utility and power lines Please ensure that there are no utility or powe...

Page 8: ...horizontal line on the wall This will mark where the top edge of the unit will be There should be a 300mm distance in between the line and the ceiling minimum 150mm Align the top of the drilling template on the line and fixate it with tape With the aid of the level reassure that the drilling template is still straight Mark along the contours of the drilling templates Remove the drilling template M...

Page 9: ...ntrol cable and the cut the duct out 3 6 Drilling Drill 2 holes Ø 120mm with a cored hole drill along the marked points Keep a 2 downward gradient angle Drill 4 holes for the dowels along the marked points Ø8mm 60mm deep 3 7 Insert ventilation pipes Level and fixate the drilling template along the hairline cross and hold it in place by inserting the 8mm dowels Insert both pipes through the drillin...

Page 10: ...o be installed excess length of aprox 250mm 3 9 Resurfacing Caution Before resurfacing ensure that the ventilation pipes are covered Resurface and reseal the wall Wait for plaster to dry 3 10 Trim ventilation pipes Cut the ventilation pipes on the inside so they are level with the wall Smooth out any rough edges deburr Cut and deburr the ventilation pipes on the outside depending on the façade cov...

Page 11: ...d clean the mounting box 4 2 Insert ventilation pipes Insert both ventilation pipes into the mounting box until they are flush mounted Mark the length of the ventilation pipes on the exterior side depending on the façade cover Facade cover model Excess length of ventilation pipes Ventilation hood M WRG ES 5 10mm Ventilation Grille Set M WRG ESR 25 30mm Ventilation Grille AP M WRG ESG AP 5mm Ventil...

Page 12: ...ilation unit and at the same time grab the edge of the cover with both index fingers and then carefully lift the cover up and towards you 5 2 Seal the stubs Check the sealing tape make sure it goes all the way around the stub 5 3 Insert mounting screws Put flat washers onto the screws then insert the mounting screws through the holes Push the centering gauges onto the screws so the tip of the scre...

Page 13: ... ventilation pipes and push the casing onto the wall resp into the mounting box Check if the holes for the screws align with the dowels The casing has to fit snug to the wall Tighten casing screws lightly Check the position of the casing with a level and correct it if necessary Fully tighten the casing screws 5 6 Connect M WRG ventilation unit Warning All electrical work has to be performed by a c...

Page 14: ...ic shocks and ensures proper supply air flow Insert the power connector cover into the slot and push in until you hear the hook snap close Insert a 3 5x35mm cross head screw and tighten Insert the cover for network connector 5 8 Close unit cover Grab the cover with both hands Place it onto the unit and insert the hooks into the slots Rotate the cover downwards Carefully push the cover closed on th...

Page 15: ...all Once the ventilation unit is fully installed simply place the frame over it 7 Install façade cover Caution Due to safety reasons it is not allowed to operate the ventilation unit without a façade cover Please refer to the assembly manual of your façade cover For example M WRG ES P Model Nr 5153 8 Start up the ventilation unit Start up and operate the ventilation unit according to the user manu...

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