Meltem M-WRG-II M User manual

Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
INSTALLATION MANUAL
HOME VENTILATION WITH HEAT RECOVERY
Flush-mount installation kit
M-WRG-II M
(frame construction)
for ush-mounting ventilation units from the
M-WRG-II series, with optional ductwork connection
for connecting exible pipes or at ductwork
Part no. 744002EN Week 44/2020 EN

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Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
Contents
1 Introduction ................................................................................................................... 4
1.1 Notes on this installation manual .................................................................................... 4
1.2 Description ...................................................................................................................... 4
1.3 Target group .................................................................................................................... 5
1.4 Nameplates ..................................................................................................................... 5
1.5 Storage ........................................................................................................................... 5
1.6 Revision index ................................................................................................................ 6
1.7 Explanation of the symbols used .................................................................................... 6
1.8 Supplementary documents ............................................................................................. 6
2 Safety instructions ....................................................................................................... 7
2.1 Hazardclassication ....................................................................................................... 7
2.2 Notes on using the ventilation units safely ...................................................................... 7
2.2.1 Fire protection ................................................................................................................. 7
2.2.2 Operationwithreplaces ................................................................................................ 7
2.2.3 Installation in wet areas .................................................................................................. 8
2.2.4 Condensate drain ........................................................................................................... 8
2.2.5 Starting and using the ventilation unit ............................................................................. 8
2.3 Notes on using the ventilation units ................................................................................ 8
2.4 Note on use in conjunction with room air conditioners ................................................... 9
2.5 Intended use ................................................................................................................... 9
3 Planning notes ............................................................................................................ 10
3.1 Requirements for the installation wall ........................................................................... 10
3.2 Positioning the ventilation unit indoors ......................................................................... 10
3.3 Unrestricted access to the ventilation unit .................................................................... 12
3.4 Additionalplanningnoteswhenconnectingaexiblepipeoratductworksystem
using the ductwork connection adapter M-WRG-II AD-UP ........................................... 12
3.4.1 Firesafetyandsoundproong ...................................................................................... 12
3.4.2 Flat ductwork ................................................................................................................ 12
3.4.3 Flexible pipes ................................................................................................................ 13
3.5 Retrospectivelyush-mountingtheinstallationkit ........................................................ 13
3.6 Electrical connection ..................................................................................................... 13
3.7 Planning example for installing the installation kit without a ductwork connection in a
frame construction with 160 mm thick framing members ............................................. 14
3.8 Planning example for installing the installation kit with a ductwork connection in a
frame construction with 160 mm thick framing members ............................................. 15
4 Warranty and liability .................................................................................................. 16
4.1 Warranty ....................................................................................................................... 16
4.2 Liability .......................................................................................................................... 16
5 Items supplied ............................................................................................................. 17
5.1 Installation kit M-WRG-II M, part no. 710000 ................................................................ 17
5.2 Options ......................................................................................................................... 17
5.3 Installation materials required ....................................................................................... 17

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Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
6 Dimensions of the installation kit ............................................................................. 18
7 Tools and equipment required ................................................................................... 19
8 General installation instructions ............................................................................... 19
9 Installing the installation kit ...................................................................................... 20
9.1 Creating a mount for the installation kit in a frame construction ................................... 20
9.2 Sawingchannelsforatductworkorexiblepipes(onlywhenconnectingaat
ductworkorexiblepipesystem) ................................................................................. 21
9.2.1 Exampleofaatductworkconnectionontheextractairside(multi-roomversion,
onlywhenconnectingaatductworksystem) ............................................................. 22
9.2.2 Exampleofaexiblepipeconnectionontheextractairand/orsupplyairside(multi-
roomversion,onlywhenconnectingaexiblepipesystem) ........................................ 23
9.3 Running the mains and control cables .......................................................................... 25
9.3.1 Cable types ................................................................................................................... 26
9.3.2 External control input .................................................................................................... 26
9.3.3 Option M-WRG-II O/EGG-AUS ..................................................................................... 27
9.4 Insertingandxingthewallbox .................................................................................... 28
9.5 Inserting the cardboard insert and plaster cover .......................................................... 30
9.6 Filling gaps around the wall box with insulating material .............................................. 31
9.7 Connecting the wall box to the vapour barrier .............................................................. 31
9.8 InsertingM-WRG-IIAD-UPductworkconnectionadapterandllinggapswithfoam
(onlywhenconnectingaatductworkorexiblepipesystem) .................................... 32
9.9 Insertingatductworkintoductworkconnectionadapter(onlywhenconnectinga
atductworksystem) .................................................................................................... 33
9.10 Joiningexiblepipeconnectorsandcuttingexiblepipestolength(onlywhen
connectingaexiblepipesystem) ................................................................................ 34
9.11 Insertingexiblepipesintoexiblepipeadapter(onlywhenconnectingaexible
pipesystem) ................................................................................................................. 35
9.12 Condensate drain on the exhaust air pipe .................................................................... 36
9.13 Claddingtheinstallationkitandatductwork/exiblepipesontheinside .................. 37
9.14 Aligning the wall box on the outside before plastering .................................................. 38
9.14.1 If the wall is less than 36.5 cm thick ............................................................................. 38
9.14.2 If the wall is more than 36.5 cm thick ............................................................................ 38
9.15 Plastering the installation kit on the outside .................................................................. 39
9.16 Preparing the installation kit for connecting the ventilation pipes ................................. 40
9.17 Cutting ventilation pipes to length ................................................................................. 41
9.18 Insertingandxingtheventilationpipes ....................................................................... 42
9.19 Sealing ventilation pipes on external wall ..................................................................... 42
9.20 Attaching the outer wall terminal ................................................................................... 43
10 Installing the ventilation unit ..................................................................................... 43

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Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
1 Introduction
1.1 Notes on this installation manual
This installation manual contains important information that should be followed when
installing the M-WRG-II M installation kit for the M-WRG-II ventilation units.
►Read all the instructions carefully before installing the kit to avoid possible risks and
mistakes.
►When assembly is complete, give these instructions to the home owner, caretaker or
property manager.
►These instructions are part of the product. Keep the instructions in a safe place for
future reference.
WARNING
►Follow ALL danger and warning instructions and notes on precautionary measures.
►Read sections “2 Safety instructions” on page 7 and “3 Planning notes” on
page 10 carefully.
1.2 Description
Thismanualdescribeshowtoush-
mount the M-WRG-II M installation kit
(item1inFig.1)inframeconstruc-
tions.Inanewbuildoraretrot,ifa
complete wall aperture is planned for the
installationkit,theoptionalllerpiece
M-WRG-IIM/Fü(item2inFig.1)canbe
used to pack out the wall. Flush-mount
atductworkorexiblepipesystems
can be connected using the ductwork
connection adapter M-WRG-II AD-UP
(item3inFig.1)whichisavailableas
an option. The ductwork connection
adapter can be used on the extract
air side, supply air side or on both
sides of the installation kit as required.
The combination of installation kit
M-WRG-II M and ductwork connection
adapter M-WRG-II AD-UP is suitable for
applications in which the wall is not thick
enough for the integrated into wall instal-
lation kit M-WRG-II M-U2.
Fig. 1: Installation kit M-WRG-II M with optional
llerpieceM-WRG-IIM/Füandductwork
connection adapter M-WRG-II AD-UP
1
2
3

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Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
1.3 Target group
The activities described in this manual must only be carried out by specialised personnel
withthefollowingqualications:
— Training in the installation and commissioning of electrical devices
— Training in electrical hazards and the local safety requirements
— Knowledge of the relevant standards and directives
— Knowledge and observance of this document and all the safety instructions
1.4 Nameplates
The nameplates are attached in two places:
— ontheplastercover(item1inFig.2)
— besidethecableinletforthemainsandcontrolcables(item1inFig.3)
Fig. 2: Nameplate on the plaster cover
1
Fig. 3: Nameplate beside cable inlet
1
1.5 Storage
Store the installation kit in its original packaging in a dry place where the temperature
ranges between 0 °C and +40 °C.

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Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
1.6 Revision index
Edition Manual Date
1st edition Installationmanualforush-mountinstallationkit
M-WRG-IIM(frameconstruction)
Week 44/2020 EN
1.7 Explanation of the symbols used
►This symbol indicates an action to be taken.
— This symbol indicates a list.
1.8 Supplementary documents
Manual Part no.
Installation manual for M-WRG-II ventilation units 744004EN
Installation manual for outer wall terminals M-WRG-II ES, M-WRG-II KSR 744005EN
Installationmanualforwindowrevealinstallationkit(inpreparation) 744006EN
OperatinginstructionsforM-WRG-IIP(-F,-FC),M-WRG-IIE(-F,-FC)
ventilation units
744007EN
Table 1: Supplementary documents

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Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
2 Safety instructions
This manual contains notes that you must follow for your own personal safety and to
avoid injury and damage to property. They are highlighted by warning triangles and are
shown as follows according to the level of danger.
2.1 Hazard classication
DANGER
The signal word designates a hazard with a high degree of risk which, if it is not
avoided, will result in death or severe injury.
WARNING
The signal word designates a hazard with a medium degree of risk which, if it is not
avoided, will result in death or severe injury.
CAUTION
The signal word designates a hazard with a low degree of risk which, if it is not avoided,
could result in minor or moderate injury.
NOTICE
A note as used in this manual contains important information about the product or about
a part of the manual to which particular attention should be paid.
2.2 Notes on using the ventilation units safely
2.2.1 Fire protection
Followthegenerallyapplicableresafetyrequirementswhenplanningandinstallingthe
unit.
2.2.2 Operation with replaces
— Anadditionalsafetydevice(underpressureordi󰀨erentialpressuremonitor)isneeded
to monitor operation when M-WRG-II ventilation units are used in conjunction with
replaces.
— FollowtherequirementsoftheGermanFireCode(FeuVo)whenplanningand
installing the unit.
— Contact the local chimney sweep before the end of the planning phase.
— Have the chimney sweep approve the operation of the ventilation unit.
— Correct use of a ventilation system set up with the decentralised ventilation unit
requiresthepossibilityofshuttingo󰀨combustionairpipesanduesystemsforsolid
fuelreplacesduringperiodsinwhichthereplacesarenotinuse.

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Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
2.2.3 Installation in wet areas
ThefollowingrulesfromDINVDE0100-701/702(IEC60364-7-701)applytoinstallation
of M-WRG-II ventilation units in wet areas:
— Protection zone 0: The unit must NOT be installed in this area.
— Protection zone 1: The unit must only be installed with the “integrated into wall” U2
variant. The extract and supply air valves must be installed in the top part of the wall
or in the ceiling.
— Protection zone 2 and other zone: The unit may be installed in this area.
Country-specicstandards/regulationsonobservingtheprotectionzonesforinstallation
in rooms with bathtub or shower must also be followed.
2.2.4 Condensate drain
The heat recovery process in our ventilation units causes condensation. This condensa-
tion is dissipated via the exhaust air pipe.
— If M-WRG-II P ventilation units are used, a condensate connection should be provided
(seesection9.12onpage36).
— WithM-WRG-IIEventilationunits(withenthalpyheatexchanger)thereisnoconden-
sationifthefollowingrequirementsarefullled:
— Theventilationunitisoperatedasdescribedin“Intendeduse”(seesection2.5on
page9)andthe“Rulesforcorrectusage”chapteroftheoperatinginstructions.
— There is no exceptional loading due to very high atmospheric humidity.
2.2.5 Starting and using the ventilation unit
— Do not start up the ventilation unit until it is fully installed.
— Always make sure that the cover is closed and locked in place before using the venti-
lation unit.
— Please note that the ventilation unit must not be used without the outer wall terminal
for safety reasons.
2.3 Notes on using the ventilation units
— This unit may be used by children from 8 years old and by persons of restricted phys-
ical, sensory or mental abilities or persons lacking experience and knowledge if they
are supervised or have been instructed in how to use the unit safely and understand
the associated hazards. Do not allow children to play with the unit. Cleaning and user
maintenance must not be carried out by children unless they are supervised.
►Follow the regulations applicable in your country concerning the age from which
people may be permitted to operate the ventilation unit.

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Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
— The ventilation unit must always be freely accessible for operation and maintenance.
►Make sure that the ventilation unit is not covered or obstructed when the room is
subsequently decorated and furnished, otherwise it cannot be operated and it will
notbepossibletoreplacetheairlters.Youshouldthereforemaintainaclearance
of at least 15 cm in front of the ventilation unit cover.
►Make sure that the supply and extract air openings are not covered when the room
is subsequently decorated and furnished, otherwise the ventilation unit’s functions
may be impaired.
2.4 Note on use in conjunction with room air conditioners
Condensation may form in the ventilation unit if the outdoor air temperature and humidity
are high, but the room temperature is cool.
For these conditions, we recommend using the M-WRG-II E ventilation unit with enthalpy
heat exchanger. This has the advantage of removing both sensible and latent heat from
thesupplyair.Asaresult,theairisdehumidiedaswellasbeingprecooled.Theroom
air conditioner needs to do less work, so the user saves money on the reduced power
consumption.
2.5 Intended use
— The ventilation unit is designed to ventilate living spaces and rooms used for
quasi-residential purposes. The ventilation unit is installed in a perpendicular position
intheexternalwall.Anydi󰀨erentormoreextensiveusagewillberegardedascontrary
to the intended use.
— The intended use also includes compliance with all the notes in the operating instruc-
tions.
— Theventilationunitmustnotbeoperatedwithoutairltersorouterwallterminal.
— The ventilation unit is intended for use in rooms with normal room air humidity levels
of approx. 40 % to 70 % RH. It must not be installed in rooms in which the relative
humidity during operation constantly exceeds 80 %.
— The ventilation unit’s functions may be impaired or the unit may be damaged in rooms
withalotofdust(e.g.model-making)orcorrosivegasemissions(e.g.blueprintshop,
cleaning).
— For any use contrary to the intended use, Meltem Wärmerückgewinnung GmbH & Co. KG
shallacceptnoliabilityforanydamagethatmayoccurando󰀨ersnowarrantythatthe
ventilation unit will work perfectly and correctly.

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Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
3 Planning notes
3.1 Requirements for the installation wall
The installation kit can be installed in frame constructions with walls that are at least
24cmthick(includinginternalplaster,externalrenderandinsulation).
►For wall structures that are 63 cm thick or more, you will need 100 cm long outdoor
andexhaustairpipes(M-WRG-LR100,partno.5580).
NOTICE
Theinstallationkitxestheventilationpipeswitha2°falltotheexternalwall.
— Theinstallationkitcanbeshortenedbyupto165mm(tonolessthan200mm).
Allow the kit to protrude into the external thermal insulation composite system
(ETICS)asthisistheonlywaytoallowtheventilationpipestopassfarenough
throughandsobexedinplace.
— WhenttingtheETICS,makesurethattheventilationpipesmaintaintheir2°fall.
3.2 Positioning the ventilation unit indoors
Fig. 4: Minimum distances and options for positioning the M-WRG-II M installation kit,
dimensions in millimetres
min. 50
min. 150 without ductwork connection
min. 300 with ductwork connection
min.50(*)
(*) Ifacondensateconnection(seesection9.12onpage36)isused,theminimumdimensionsmustbe
adapted to suit the local conditions. This applies, in particular, if condensate is drained inwards, e.g. via a
greywater outlet.
The ventilation unit must be installed indoors in a perpendicular position on an external
wall.
— Theush-mountinstallation(wallbox)kitmustbeinstalledsothattheopeningsfor
extract air and supply air point up.
— Forastandardroomheightof2.50m,thebeste󰀨ectforairexchangeisachievedif
the top edge of the unit with the supply and extract air openings is roughly 300 mm
below the ceiling.
— A110x54mmatductworksystemora75or63mmexiblepipesystemcanbe
connectedusingtheoptionalductworkconnectionadapterM-WRG-IIAD-UP.Youwill

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Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
ndexamplesofthisinsection9.2frompage21.
► Maintainthefollowingminimumdistances(seeFig.4andFig.5):
— If there is no at ductwork or exible pipe system connected using the
ductwork connection adapter:
the distance between the top edge of the wall box and the ceiling must be at least
150 mm to prevent an air short circuit.
— If there is a at ductwork or exible pipe system connected using the ductwork
connection adapter:
the distance between the top edge of the wall box and the ceiling must be at least
300mm,otherwisetherewillnotbeenoughspaceforconnectingatductworkor
exiblepipes.
— The distance between the side and bottom edges of the wall box and adjacent
surfacesshouldbeatleast50mm(exception:ifacondensateconnectionisused,
see(*)inFig.4onpage10).Theventilationunitwillbeeasiertooperateifthis
minimumdistanceismaintained.Italsoallowstheairltertobereplacedwithout
obstruction.
— The lateral distance between two wall boxes must not be less than 200 mm to
prevent an air short circuit between the ventilation units.
Fig. 5: Lateral minimum distance between two wall boxes, dimensions in millimetres
min. 200
Dividing wall
►If the room height is greater than 2.50 m, position the ventilation unit so that the unit
canbeoperatedandlterscanbemaintainedunaided(withoutsteps,ladders,etc.).
Alternatively you can order a ventilation unit that can be operated externally.
NOTICE
Follow the notes in Table 2 on page 26 when planning the unit. This contains informa-
tion about the types of mains and control cable for each ventilation unit and the recom-
mended operating options.

- 12 -
Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
3.3 Unrestricted access to the ventilation unit
The ventilation unit must always be freely accessible for operation and maintenance.
►Make sure that the ventilation unit is not covered or obstructed when the room is
subsequently decorated and furnished, otherwise it cannot be operated and it will not
bepossibletoreplacetheairlters.Youshouldthereforemaintainaclearanceofat
least 15 cm in front of the ventilation unit cover.
►Make sure that the supply and extract air openings are not covered when the room is
subsequently decorated and furnished, otherwise the ventilation unit’s functions may
be impaired.
3.4 Additional planning notes when connecting a exible pipe or at ductwork
system using the ductwork connection adapter M-WRG-II AD-UP
3.4.1 Fire safety and soundproong
WARNING
Observe the relevant re safety and soundproong regulations
► Observetheregulationsconcerningtherebehaviourofbuildingmaterialsand
componentsasdenedinDIN4102(EN13501).
► Observetheregulationsconcerningsoundproonginbuildingsasdenedin
DIN 4109, particularly the requirements for insulation against airborne and impact
sound.
►Observe the building regulations applicable in your country.
3.4.2 Flat ductwork
NOTICE
► Observethefollowingrecommendationswhenusingatductworktoavoidunneces-
sary pressure losses in the ducts.
— Makesurethatthecutoutsfortheatductworkdonota󰀨ectthelocalstaticload-
ing and thermal insulation requirements.
— Horizontal runs in the external wall should be as short as possible.
— Thetotallengthofaatductshouldnotexceed6m,aspermittedbythestatic
calculations.
— Minimisethenumberofbendsintheatductwork.

- 13 -
Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
3.4.3 Flexible pipes
NOTICE
► Observethefollowingrecommendationswhenusingexiblepipestoavoidunnec-
essary pressure losses in the pipes.
— Alwaysconnecttwoexiblepipestotheexiblepipeconnection.
— Asfaraspossible,useexiblepipeswithadiameterof75mm.
— Thetotallengthofeachexiblepipeshouldnotexceed10m.
— Minimisethenumberofbendsintheexiblepipes.
— Runthetwoexiblepipesofaexiblepipeconnectioninparalleltooneanother.
Theminimumdistancebetweentheexiblepipesmustnotbelessthan3xthe
pipe diameter.
3.5 Retrospectively ush-mounting the installation kit
WARNING
Danger from emerging gas or electric shock
► Makesurethattherearenosupplylinesinthevicinityofthewallaperture(e.g.
power,gasorwater).
► Makesurethatthewallaperturedoesnota󰀨ectthelocalstaticloadingrequire-
ments.
► Ifyouareinstallingthekitretrospectively,runtheexiblepipesinasuspended
ceiling.
3.6 Electrical connection
Theworkingvoltagerangeoftheventilationunitisbetween85VACand265VAC/
50-60 Hz.
NOTICE
If the ventilation unit is not equipped with a mains connection cable and plug or other
means of disconnecting from the mains supply that has, at each pole, a contact opening
width that conforms to the conditions of overvoltage category III for complete separa-
tion,thensuchanisolatingunit(e.g.circuitbreaker)mustbeintegratedintotheperma-
nently installed electrical system in accordance with the installation regulations. The
isolatingunitmustbeidentiedassuchandeasytoaccess.

- 14 -
Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
3.7 Planning example for installing the installation kit without a ductwork
connection in a frame construction with 160 mm thick framing members
Fig. 6: Planning example for installing the installation kit without a ductwork connection in a frame construction with
160 mm thick framing members
C
A A
B
B
8
8
10
129
3
4
5
6 7 10 4
1
00
1
60
1
5
1
5
1
5
1
2,5
31
7,5
11
11
1
2,5
11 7
10 6
1
5
A- A
B- B
C
Option: M-WRG-II M/Fü
llerpiece
Note the excess pipe length
speciedintheinstallationman-
ual for the outer wall terminals.
M-WRG-II ES: 5-10 mm
290 M-WRG-II M
(shortened)
List of components
Item Description
1 15 mm external render
2Woodbreinsulation100mm
3 15 mm OSB board
4 160 x 60 mm framing member
5 160 mm insulation
6 15 mm OSB board
7 12.5 mm plasterboard
8Batten(supportandxingforinstallationkit)
9 Outdoor air and exhaust air pipe DN 100
10 Installation kit M-WRG-II M
(option:M-WRG-IIM/Füllerpiece)
11 M-WRG-II ventilation unit
Gap between the installation kit and M-WRG-II ventilation unit

- 15 -
Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
3.8 Planning example for installing the installation kit with a ductwork
connection in a frame construction with 160 mm thick framing members
Fig. 7: Planning example for installing the installation kit with a ductwork connection in a frame construction with
160 mm thick framing members
A- A
B- B
C
A
A
B
B
C
129
3
4
5
6 7 810 4
11
12
13
11
8
8
10
1
00
1
60
1
5
1
5
1
5
1
2,5
31
7,5
58
76
210
84
102
Cutouts in the
upper batten for
atductwork
Cutouts in the
lowerbattenforat
ductwork
Option: M-WRG-II M/Fü
llerpiece
Note the excess pipe length
speciedintheinstallationman-
ual for the outer wall terminals.
M-WRG-II ES: 5-10 mm
290 M-WRG-II M
(shortened)
List of components
Item Description
1 15 mm external render
2Woodbreinsulation100mm
3 15 mm OSB board
4 160 x 60 mm framing member
5 160 mm insulation
6 15 mm OSB board
7 12.5 mm plasterboard
8Batten(supportandxingforinstallationkit)
9 Outdoor air and exhaust air pipe DN 100
10 Installation kit M-WRG-II M
(option:M-WRG-IIM/Füllerpiece)
11 M-WRG-II AD-UP ductwork connection adapter
12 M-WRG-FK-Watductworkelbow
13 M-WRG-FK-Fatductwork110x54mm
Elbow shortened by
7 mm

- 16 -
Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
NOTICE
Frameconstructionsareimplementedinmanydi󰀨erentways,soitisnotpossibleto
provide a generally-applicable description for every variant. This planning example
shows the installation in a frame construction with 160 mm thick framing members. The
installation will have to be adapted accordingly for other framing member thicknesses or
wall structures.
►If you are in any doubt, please send us a dimension drawing of your wall section so
we can provide you with a custom solution.
4 Warranty and liability
4.1 Warranty
The following cases shall invalidate the warranty:
— The installation kit was not installed as described in the installation manual.
— The ventilation unit was not installed as described in the installation manual.
— Theventilationunitwasush-mountedwithoutusingaush-mountinstallationkit.
— Genuineparts/genuineairlterswerenotreplacedwithgenuineparts.
— Unapproved changes were made to the installation kit or ventilation unit.
— Repairs were not carried out by Meltem or by an authorised specialist company.
— Theventilationunitwasoperatedwithoutairltersandouterwallterminals.
— Thewarrantydoesnotcoverwearingpartssuchasairlters.
4.2 Liability
The manufacturer’s liability shall not apply in the following cases:
— The installation kit was not installed as described in the installation manual.
— The ventilation unit was not installed as described in the installation manual.
— Theventilationunitwasush-mountedwithoutusingaush-mountinstallationkit.
— Genuineparts/genuineairlterswerenotreplacedwithgenuineparts.
— Unapproved changes were made to the installation kit or ventilation unit.
— Repairs were not carried out by Meltem or by an authorised specialist company.
— Theventilationunitwasoperatedwithoutairltersandouterwallterminals.

- 17 -
Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
5 Items supplied
Fig. 8: Items supplied with the installation kit M-WRG-II M
25
3
4
6
1
7
5.1 Installation kit M-WRG-II M, part no. 710000
Item Description Quantity
1 Plaster cover for wall box 1x
2 Signal cover 1x
3 Cardboard insert 1x
4 Wall box 1x
5 Protective sleeve 2x
5.2 Options
Item Description Part no.
6InstallationkitllerpieceM-WRG-IIM/Fü 735003
7Ductworkconnectionadapterforush-mountinstallationkitforthe
M-WRG-II series
731003
- Plaster scrim M-WRG-II PG 735000
5.3 Installation materials required
Additionalinstallationmaterialsareneededforush-mountinstallation.Thesemustbe
ordered separately.
Item Description Part no.
- Outdoor air and exhaust air pipe, DN 100, 2 x 0.5 m,
M-WRG-LR 50
5574
- If a condensate connection is used:
Outdoor air and exhaust air pipes, DN 100, 2 x 0.5 m, exhaust
air pipe with 1/2” male thread condensate connection,
M-WRG-II LR 50-KA
735200

- 18 -
Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
6 Dimensions of the installation kit
Fig. 9: Installation kit dimensions in millimetres
365
165
410
B
135
120,5
208,5
125
148
194,5
434,5
660
A
200
208,5
117,5
M-WRG-II M/Fü,
optional,
part no. 735003
M-WRG-II AD-UP,
optional,
part no. 731003
A Cableinletforthemainsandcontrolcables(acontrolcableisonlyneededforcertainventi-
lationunits,seeTable2onpage26)
B Theinstallationkitcanbeshortenedbyupto165mm(tonolessthan200mm).
NOTICE
With the M-WRG-II WM-M option, part no. 720003, the kit can be shortened at the factory to a
minimum length of 185 mm.

- 19 -
Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
7 Tools and equipment required
— Permanently elastic sealant, solvent-free if applied to polystyrene
— Sealing tape, 30 mm wide, e.g. Coroplast
— Sealing tape for bonding the wall box to the vapour barrier, e.g. Rissan®from SIGA
— Ifnecessary,wedgesforxingthewallbox,8x
alternativelyuseinatableaircushions,4x,e.g.Amo-BagfromWürth,
part no. 07156780
— Ifnecessary,wedgesforxingthellerpiece,4x
alternativelyuseinatableaircushions,2x,e.g.Amo-BagfromWürth,
part no. 07156780
— Adhesive tape
— Perforatedtapeforxingatductworkorexiblepipes
— ExpandingfoamwithabP(nationaltechnicaltestcerticateoftheDIBt)approval
(“exactgap”foamisrecommended)
— Saw for cutting the ventilation pipes to length
— Saw for cutting the channels in the frame construction
— Styrofoam saw
— Spirit level
8 General installation instructions
NOTICE
— The unit must be installed in accordance with the generally acknowledged rules of
technology.
— Connections with adjacent components must be formed to absorb movements
between the contact surfaces.
— Sealanyconnectionsthatareexposedtodrivingrainwithtapes,prolesorsealants
suchthattheyo󰀨ersu󰀩cientprotectionagainsttheexpectedconditions.
WARNING
Follow the relevant accident prevention regulations
►Follow the accident prevention regulations when setting up the installation location.
►Protect the outside area against falling parts.

- 20 -
Installation manual
M-WRG-II M
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
9 Installing the installation kit
NOTICE
Frameconstructionsareimplementedinmanydi󰀨erentways,soitisnotpossibleto
provide a generally-applicable description for every variant. This installation example
shows the installation in a frame construction with 160 mm thick framing members. The
installation will have to be adapted accordingly for other framing member thicknesses or
wall structures.
►If you are in any doubt, please send us a dimension drawing of your wall section so
we can provide you with a custom solution.
9.1 Creating a mount for the installation kit in a frame construction
►Commission an architect or design
professional to include the mount for
the installation kit at a suitable point
in the construction drawing.
►Incorporate two wooden battens into
the frame construction at the planned
installation position:
— Thelowerbatten(item1in
Fig.10)actsasasupport.
NOTICE
► Useaspiritlevel(item2inFig.10)
to check that the lower batten is
exactly horizontal as this is the only
way to ensure that any condensa-
tion will be carried outside by the
2° pipe fall in the installation kit
(item3inFig.10).
— Theupperbatten(item4inFig.10)isusedtoxtheinstallationkit.
NOTICE
— Theinstallationkitisxedintheoptimumpositionwithaverticaldistanceof660mm
betweenthelowerandupperbatten(seeFig.10).Youcaninserttheinstallationkit
temporarilywhilexingthebattenstoensurethatthekitwilltperfectly.
— Maintain the following minimum distances:
— At least 435 mm between the vertical framing members
— At least 300 mm between the top edge of the wall box and the ceiling
— At least 50 mm between the side and bottom edges of the wall box and adjacent
surfaces
Fig. 10: Creating a mount for the installation kit in a
frame construction – dimensions in millimetres
min. 435
660
min. 300
1
2
3
4