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Installation manual

M-WRG-II M-U

- 13 -

Meltem Wärmerückgewinnung GmbH & Co. KG

Am Hartholz 4 · D-82239 Alling

[email protected] · www.meltem.com

VENTILATION THE RIGHT WAY

V E N T I L A T I O N & H E A T R E C O V E R Y

3.3.2 Flat ductwork

NOTICE

► Observe the following recommendations when using flat ductwork to avoid unneces

sary pressure losses in the ducts.

—

Make sure that the wall aperture does not affect the local static loading and ther

mal insulation requirements.

— Horizontal runs in the external wall should be as short as possible.

—

The total length of a flat duct should not exceed 6 m, as permitted by the static

calculations.

—

Minimise the number of bends in the flat ductwork.

3.3.3 Flexible pipes

NOTICE

► Observe the following recommendations when using flexible pipes to avoid unnec

essary pressure losses in the pipes.

—

Always connect two flexible pipes to the flexible pipe connection.

—

As far as possible, use flexible pipes with a diameter of 75 mm.

—

The total length of each flexible pipe should not exceed 10 m.

—

Minimise the number of bends in the flexible pipes.

—

Run the two flexible pipes of a flexible pipe connection in parallel to one another.

The minimum distance between the flexible pipes must not be less than 3x the

pipe diameter.

3.4

Retrospectively flush-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 breakthrough (e.g.

power, gas or water).

► Make sure that the wall breakthrough does not affect the local static loading require

ments.

►

Fit a lintel if necessary.

► If you are installing the kit retrospectively, run the flexible pipes in a suspended

ceiling.

Summary of Contents for 712000

Page 1: ... VENTILATION THE RIGHT WAY V E N T I L A T I O N H E A T R E C O V E R Y INSTALLATION MANUAL HOME VENTILATION WITH HEAT RECOVERY M WRG II M U2 installation kit for integrating the M WRG II ventilation unit series into the wall in solid walls and frame constructions Part no 744003EN Week 33 2020 EN ...

Page 2: ...entilation units 9 2 4 Note on use in conjunction with room air conditioners 10 2 5 Intended use 10 3 Planning notes 11 3 1 Positioning the ventilation unit indoors 11 3 2 Unrestricted access to the ventilation unit 12 3 3 Additional planning notes for this installation kit 12 3 3 1 Fire safety and soundproofing 12 3 3 2 Flat ductwork 13 3 3 3 Flexible pipes 13 3 4 Retrospectively flush mounting t...

Page 3: ...e pipes to length 31 8 12 Inserting flexible pipes into the flexible pipe connection 31 8 13 Plastering the installation kit and flat ductwork flexible pipes on the inside 32 8 14 Condensate drain on the exhaust air pipe 33 8 15 Aligning the wall box on the outside before plastering 34 8 15 1 If the solid wall is less than 42 5 cm thick 34 8 15 2 If the solid wall is more than 42 5 cm thick 34 8 1...

Page 4: ...st air pipe 52 9 14 Aligning the wall box on the outside before plastering 53 9 14 1 If the wall is less than 42 5 cm thick 53 9 14 2 If the wall is more than 42 5 cm thick 53 9 15 Plastering the installation kit on the outside 54 9 16 Preparing the installation kit for connecting the ventilation pipes 55 9 17 Cutting ventilation pipes to length 55 9 18 Inserting and fixing the ventilation pipes 5...

Page 5: ...nd notes on precautionary measures Read chapters 2 Safety instructions on page 8 and 3 Planning notes on page 11 carefully 1 2 Description This manual describes how to flush mount the M WRG II M U2 installation kit item 1 in Fig 1 in solid walls and frame constructions This installation kit is used to integrate ventilation units from the M WRG II series fully into the wall Two flat ductwork connec...

Page 6: ...ioning 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 see item 1 in Fig 2 beside the cable inlet for the mains and control cables item 1 in Fig 3 Fig 2 Namep...

Page 7: ...2 Week 33 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 744006EN Operating instructions for ...

Page 8: ...uld 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 fire safety requirements when planning and installing the unit 2 2 2 Operation with fireplaces An ...

Page 9: ... 14 on page 33 With M WRG II E ventilation units with enthalpy heat exchanger there is no conden sation if the following requirements are fulfilled The ventilation unit is operated as described in Intended use see section 2 5 on page 10 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 usin...

Page 10: ...ving both sensible and latent heat from the supply air As a result the air is dehumidified 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 po...

Page 11: ...0 1 2 3 If a condensate connection see section 8 14 on page 33 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 best effect for air exchange is achieved if the supply and extract air openings are as high up the wall as possible or in the ceiling Maintain the following minimum dista...

Page 12: ...re 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 filters 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 decor...

Page 13: ...mendations when using flexible pipes to avoid unnec essary pressure losses in the pipes Always connect two flexible pipes to the flexible pipe connection As far as possible use flexible pipes with a diameter of 75 mm The total length of each flexible pipe should not exceed 10 m Minimise the number of bends in the flexible pipes Run the two flexible pipes of a flexible pipe connection in parallel t...

Page 14: ...tallation kit fixes 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 273 mm If the unplastered wall is thin 30 cm or less do not cut off the installation kit flush with the unplastered wall see section 8 15 on page 34 Allow the kit to protrude into the external thermal insulation composite system ETICS as this is the onl...

Page 15: ... lower batten for flat ductwork Option M WRG II M Fü filler piece Note the excess pipe length specified in the installation man ual for the outer wall terminals M WRG II ES 5 10 mm The OSB board item 6 and plasterboard item 7 extend over the installa tion kit item 10 In this version no cutouts are needed in the OSB board for the flat ductwork 289 M WRG II M U 2 shortened Detail of version 1 List o...

Page 16: ...as described in the installation manual The ventilation unit was flush mounted without using a flush mount installation kit Genuine parts genuine air filters 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 filters ...

Page 17: ... box 1x 2 Protective cover 1x 3 Wall box 1x 4 Protective sleeve 2x 5 2 Options Item Description Part no 5 Installation kit filler piece M WRG II M Fü 735003 Plaster scrim M WRG II PG 735000 5 3 Installation materials required Additional installation materials are needed for flush mount installation These must be ordered separately Item Description Part no Outdoor air and exhaust air pipe DN 100 2 ...

Page 18: ...r 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 273 mm Two flat ductwork connections or two flexible pipe connections or one flat ductwork connec tion and one flexible pipe connection may be used in the extract air and supply air openings A configuration with ...

Page 19: ... with tapes profiles or sealants such that they offer sufficient 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 8 Installing the installation kit in a solid wall 8 1 Tools and equipment required Permanently elast...

Page 20: ...he wall breakthrough for new builds Commission an architect or design professional to include the wall breakthrough at a suitable point in the construction drawing and execute it when constructing the building shell There are two possible versions of the wall breakthrough Wall breakthrough with recess see Fig 9 for installation kit without filler piece M WRG II M Fü Complete wall breakthrough see ...

Page 21: ...g out channels for two flat ductwork connections single room version Use the wall chaser to chase out two channels 125 mm wide 85 mm deep and at least 210 mm high see Fig 11 for both the extract air duct item 1 in Fig 11 and the supply air duct item 2 in Fig 11 Check that the installation kit fits easily into the wall breakthrough Check that the installation kit can be pushed far enough into the w...

Page 22: ...nnecting flat ductwork multi room version Use the wall chaser to chase out two channels 125 mm wide 85 mm deep and at least 210 mm high see Fig 14 for both the extract air duct item 1 in Fig 14 and the supply air duct item 2 in Fig 14 PCheck that the installation kit fits easily into the wall breakthrough Check that the installation kit can be pushed far enough into the wall breakthrough for the f...

Page 23: ...Use the wall chaser to chase out a channel for the flat ductwork as described in section 8 3 1 Chasing out channels for two flat ductwork connections single room version on page 21 Use the wall chaser to chase out one channel for the flexible pipe 170 mm wide and 85 mm deep as far as the flexible pipe outlet in the ceiling see Fig 15 and Fig 16 on page 23 Check that the installation kit fits easil...

Page 24: ...must not be less than 3x the pipe diameter Fig 17 contains a planning example for running a flat duct and the flexible pipes Always run 2 flexible pipes in the supply air or extract air room NOTICE The dimensions of the wall channels for the flat ducts are 125 mm wide 85 mm deep The dimensions of the wall channels for the flexible pipes are 170 mm wide 85 mm deep 8 4 Chasing out channels for conne...

Page 25: ...N 50110 1 for working on elec trical systems Disconnect from mains all pole disconnection of a system from live parts Secure against reconnection Check that the system is voltage free Earth and short circuit Cover or block off access to adjacent live parts Run the mains cable item 1 in Fig 19 and the control cable if required item 2 in Fig 19 The cables should extend roughly 250 mm beyond the wall...

Page 26: ...4x1 5 mm2 Building management system Modbus Loxone KNX J Y St Y 2x2x0 6 mm J Y St Y 2x2x0 8 mm 700030 700031 700032 701030 701031 701032 M WRG II P S 485 M WRG II P S 485 F M WRG II P S 485 FC M WRG II E S 485 M WRG II E S 485 F M WRG II E S 485 FC NYM J 3x1 5 mm2 or NYM J 4x1 5 mm2 Touch Control network J Y St Y 2x2x0 6 mm J Y St Y 2x2x0 8 mm Table 2 Types of mains cable and control cable for eac...

Page 27: ...no 721005 M WRG II O EST 2 without run on time part no 721006 Windowless rooms can be ventilated in accordance with DIN 18017 3 in combination with the M WRG II O NOF option part no 721004 8 5 3 Option M WRG II O EGG AUS Part no Option M WRG II O EGG AUS Type of control cable 721003 Unit OFF input e g via an external smoke detector or window contact J Y St Y 2x2x0 6 mm J Y St Y 2x2x0 8 mm Potentia...

Page 28: ... wall box item 5 in Fig 22 Push the wall box item 3 in Fig 22 fully into the wall breakthrough 8 7 Inserting the protective cover and plaster cover Insert the protective cover item 1 in Fig 23 into the wall box item 3 in Fig 23 NOTICE When the gaps around the wall box are filled with foam see section 8 9 on page 30 there is a risk that the wall box will be deformed by the pressure of the foam if t...

Page 29: ...e wall box is perpendicular as this is the only way to ensure that any condensa tion will be carried outside by the 2 pipe fall Fix the filler piece if needed to the external wall with wedges or air cushions NOTICE The plastering trim is 15 mm deep see Fig 25 If the depth of plaster should be more than 15 mm position the wall box so that it protrudes sufficiently out of the solid wall If you do no...

Page 30: ... Inserting flat ductwork into channels NOTICE If you are using flexible pipes continue from section 8 11 Cutting flexible pipes to length on page 31 Insert a fitting e g the flat ductwork connector M WRG FK V part no 5591 item 1 in Fig 27 into the opening in the wall box NOTICE All fittings flat ductwork connectors bends angles etc inserted into the opening in the wall box must have the external d...

Page 31: ...on the wall box 8 12 Inserting flexible pipes into the flexible pipe connection Insert the sealing rings item 1 in Fig 29 into the second groove on the flexible pipe These are available as accessories M WRG FR DR75 part no 5056 41 75 or M WRG FR DR63 part no 5056 41 63 for the corresponding diame ters Insert the flexible pipes into the openings in the flexible pipe connec tion Make sure that the f...

Page 32: ...nstallation kit and the solid wall Cover the flat ductwork with plaster scrim Cover the flexible pipes with plaster scrim as far as the outlet in the ceiling NOTICE Applying plaster scrim will minimise subsequent cracking of the plaster Plaster the internal wall The plaster forms the airtight layer on the internal wall The expanding foam does not act as an airtight layer When plastering make sure ...

Page 33: ... Fig 33 for retaining the condensate The condensate drain is not needed for M WRG II E units under the following conditions The ventilation unit is operated as described in Intended use see section 2 5 on page 10 and the Rules for correct usage chapter of the operating instructions There is no exceptional loading due to very high atmospheric humidity NOTICE Note the following points when creating ...

Page 34: ...s with a 2 fall to the external wall If the unplastered wall is thin 30 cm or less do not cut off the wall box flush with the unplastered wall Allow the wall box to protrude into the external thermal insula tion composite system ETICS as this is the only way to allow the ventilation pipes to pass far enough through and so be fixed in place When fitting the ETICS make sure that the ventilation pipe...

Page 35: ...d flush with the subse quent plaster coat The protective sleeves provide the bonding surface for the external plaster NOTICE Prepare the substrate suitably before plastering Apply the plaster scrim item 2 in Fig 36 and Fig 37 to the outside of the wall box masonry and or facade insulation NOTICE Applying plaster scrim will minimise subsequent cracking of the plaster Plaster the external wall The p...

Page 36: ...fully remove the plaster cover item 2 Fig 38 and the protective cover lying underneath Use a blade to score the plaster on the inside of the supply air and extract air openings item 3 in Fig 38 and remove the adhesive tape with the plaster Work on the external wall Remove the two protective sleeves item 1 in Fig 39 8 18 Cutting ventilation pipes to length Push the two ventilation pipes item 1 in F...

Page 37: ... pipes from the openings in the installation kit Shorten the ventilation pipes to the marked length Deburr the inner and outer ends of the ventilation pipes NOTICE If you do not deburr the ventilation pipes there is a risk of damaging the seals at the ventilation unit and outer wall terminal 8 19 Inserting and fixing the ventilation pipes Apply permanently elastic sealant to the outer skin of the ...

Page 38: ...g joints with permanently elastic sealant Fill the chamfers of the pipe break through edges all round with perma nently elastic sealant on the outside NOTICE Only use a solvent free sealant if the sealant is applied to polystyrene 8 21 Attaching the outer wall terminal WARNING Do not run without the outer wall terminal Please note that the ventilation unit must not be used without the outer wall t...

Page 39: ...n any doubt please send us a dimension drawing of your wall section so we can provide you with a custom solution 9 1 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 fixing the wall box 8x alternatively use inf...

Page 40: ...rizontal 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 44 The upper batten item 4 in Fig 44 is used to fix the installation kit NOTICE The installation kit is fixed in the optimum position with a vertical distance of 661 mm between the lower and upper batten see Fig 44 You can insert the installation kit te...

Page 41: ...st item 2 in Fig 45 Check that the installation kit fits easily into the space If necessary saw channels for the rest of the flat ductwork as shown in your plans NOTICE The dimensions of the channels for the flat ducts are 118 mm wide 60 mm deep The dimensions of the channels for the flexible pipes are 170 mm wide 85 mm deep NOTICE Observe the following recommendations when using flexible pipes to...

Page 42: ...N 50110 1 for working on elec trical systems Disconnect from mains all pole disconnection of a system from live parts Secure against reconnection Check that the system is voltage free Earth and short circuit Cover or block off access to adjacent live parts Run the mains cable item 1 in Fig 46 and the control cable if required item 2 in Fig 46 The cables should extend roughly 250 mm beyond the wall...

Page 43: ... 701020 701021 701022 M WRG II P M M WRG II P M F M WRG II P M FC M WRG II E M M WRG II E M F M WRG II E M FC NYM J 3x1 5 mm2 or NYM J 4x1 5 mm2 Building management system Modbus Loxone KNX J Y St Y 2x2x0 6 mm J Y St Y 2x2x0 8 mm 700030 700031 700032 701030 701031 701032 M WRG II P S 485 M WRG II P S 485 F M WRG II P S 485 FC M WRG II E S 485 M WRG II E S 485 F M WRG II E S 485 FC NYM J 3x1 5 mm2 ...

Page 44: ...ime delay relay that can be used to set a switch on delay and a run on time Switch on delay the M WRG II unit does not start until the set time has elapsed Run on time the M WRG II unit does not switch to the previously active ventilation program until the set time has elapsed In addition the following options are available for the external control input supplied as standard M WRG II O EST 1 witho...

Page 45: ... 8 mm Potential free fault indicator output J Y St Y 2x2x0 6 mm J Y St Y 2x2x0 8 mm Table 6 Option M WRG II O EGG AUS The connection board for the M WRG II O EGG AUS option has 5 terminals see Fig 48 3 pole connection for fault indicator output 2 pole connection for Unit OFF input We recommend that you use separate cables for the input and output NOTICE The M WRG II O EGG AUS option must be instal...

Page 46: ... the control cable if required item 6 in Fig 49 through the cable inlet in the wall box item 7 in Fig 49 Push the wall box between the two battens so that the plastering trim item 1 in Fig 50 will end flush with the eventual internal wall cladding e g OSB board plas terboard or so that the internal wall cladding will protrude slightly above the plastering trim see section A A and detail D in Fig 5...

Page 47: ... this version no cutouts are needed in the OSB board for the flat ductwork Detail of version 1 1 2 3 9 6 Inserting the protective cover and plaster cover Insert the protective cover item 1 in Fig 52 into the wall box item 3 in Fig 52 NOTICE There is a risk that the wall box will be deformed during the remainder of the installation process if the protective cover is not inserted If this happens it ...

Page 48: ...l Be careful not to block the extract air and supply air openings at the top of the wall box 9 8 Connecting the wall box to the vapour barrier The inner OSB board item 1 in Fig 54 is the vapour barrier and airtight layer The OSB board must be connected to the wall box using a suitable and approved adhe sive tape e g Rissan from SIGA Other wall structures may require different procedures Fig 54 Inn...

Page 49: ...58 mm Elements with the external dimen sions 110 x 54 mm e g flat ductwork are designed to be inserted into the fittings They must not be inserted directly into the opening in the wall box Join individual elements of the flat ductwork to create partial sections and seal every join with a layer of sealing tape 30 mm wide Insert the first section of the flat ductwork into the fitting e g the flat du...

Page 50: ...7 into the second groove on the flexible pipe These are available as accessories M WRG FR DR75 part no 5056 41 75 or M WRG FR DR63 part no 5056 41 63 for the corresponding diame ters Insert the flexible pipes into the openings in the flexible pipe connec tion Make sure that the first groove on the flexible pipe item 2 in Fig 57 engages with the locking ring item 3 in Fig 57 on the flexible pipe co...

Page 51: ...B board item 2 in Fig 58 and the plasterboard item 3 in Fig 58 Place the OSB board on the plas tering trim and fix it to the frame construction Align the cutout in the plasterboard with the cutout in the OSB board and fix the plasterboard in position When fitting the cladding note the following points The plastering trim item 1 in Fig 59 must NOT protrude above the plasterboard item 2 in Fig 59 Th...

Page 52: ... Fig 61 for retaining the condensate The condensate drain is not needed for M WRG II E units under the following conditions The ventilation unit is operated as described in Intended use see section 2 5 on page 10 and the Rules for correct usage chapter of the operating instructions There is no exceptional loading due to very high atmospheric humidity NOTICE Note the following points when creating ...

Page 53: ...e 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 273 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 fixed in place When fitting the ETICS make sure that the ventilation pipes maintain their ...

Page 54: ... flush with the subsequent plaster coat The protec tive sleeves provide the bonding surface for the external plaster NOTICE Prepare the substrate suitably before plastering Apply the plaster scrim item 2 in Fig 64 and Fig 65 to the outside of the wall box external wall and or facade insulation NOTICE Applying plaster scrim will minimise subsequent cracking of the plaster Plaster the external wall ...

Page 55: ...fully remove the plaster cover item 2 Fig 66 and the protective cover lying underneath Use a blade to score the plaster on the inside of the supply air and extract air openings item 3 in Fig 66 and remove the adhesive tape with the plaster Work on the external wall Remove the two protective sleeves item 1 in Fig 67 9 17 Cutting ventilation pipes to length Push the two ventilation pipes item 1 in F...

Page 56: ... pipes from the openings in the installation kit Shorten the ventilation pipes to the marked length Deburr the inner and outer ends of the ventilation pipes NOTICE If you do not deburr the ventilation pipes there is a risk of damaging the seals at the ventilation unit and outer wall terminal 9 18 Inserting and fixing the ventilation pipes Apply permanently elastic sealant to the outer skin of the ...

Page 57: ...g joints with permanently elastic sealant Fill the chamfers of the pipe break through edges all round with perma nently elastic sealant on the outside NOTICE Only use a solvent free sealant if the sealant is applied to polystyrene 9 20 Attaching the outer wall terminal WARNING Do not run without the outer wall terminal Please note that the ventilation unit must not be used without the outer wall t...

Page 58: ... ventilation unit NOTICE Installation of the ventilation unit in the installation kit is described in the M WRG II ventilation unit installation manual part no 744004EN 11 Installation example for installation in a solid wall U2 cover M WRG II U2 AD WS M WRG FR TVZ supply air valve M WRG FR TVA extract air valve Ceiling box M WRG DK 2x75 100 M WRG DK 2x63 100 Flexible pipe 2x75 mm 2x63 mm Fig 72 V...

Page 59: ...on manual M WRG II M U2 59 Meltem Wärmerückgewinnung GmbH Co KG Am Hartholz 4 D 82239 Alling info meltem com www meltem com VENTILATION THE RIGHT WAY V E N T I L A T I O N H E A T R E C O V E R Y Space for notes ...

Page 60: ...may nevertheless still be differences so we cannot guarantee complete accuracy The information in this publication is regularly checked and any necessary corrections are made in subsequent editions Copyright Meltem Wärmerückgewinnung GmbH Co KG We reserve the right to make changes Meltem Wärmerückgewinnung GmbH Co KG Am Hartholz 4 D 82239 Alling Germany Tel 49 8141 404179 0 Fax 49 8141 404179 9 In...

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