Meltem M-WRG-II P-T 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
OPERATING AND INSTALLATION INSTRUCTIONS
HOME VENTILATION WITH HEAT RECOVERY
Ventilation units
M-WRG-II P-T (-F, -FC)
M-WRG-II E-T (-F, -FC)
Part no. 744008EN Week 43/2019 EN

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 2 -
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 ................................................................................................................... 5
1.1 Notes on these operating and installation instructions ................................................... 5
1.2 Description ...................................................................................................................... 5
1.2.1 InControl pushbutton sensor ........................................................................................... 6
1.2.2 Three-step rotary switch with zero position .................................................................... 7
1.2.3 Optional pushbutton for intensive ventilation .................................................................. 7
1.2.4 Optional accessories ...................................................................................................... 7
1.3 Target group .................................................................................................................... 7
1.4 EU declaration of conformity ........................................................................................... 7
1.5 National technical approval (for Germany) ..................................................................... 8
1.6 Nameplate ...................................................................................................................... 8
1.7 Technical data ................................................................................................................. 9
1.7.1 Electrical connection ....................................................................................................... 9
1.7.2 Dimensions and weight ................................................................................................... 9
1.7.3 Noise emission ............................................................................................................... 9
1.7.4 Unit properties .............................................................................................................. 10
1.7.5 Unit features ................................................................................................................. 10
1.7.6 Airlters ......................................................................................................................... 11
1.8 Storage .......................................................................................................................... 11
1.9 Environmentally-friendly disposal .................................................................................. 11
1.10 Revision index ............................................................................................................... 11
1.11 Explanation of the symbols used ................................................................................... 11
1.12 Supplementary documents ............................................................................................ 11
2 Safety instructions ..................................................................................................... 12
2.1 Hazardclassication ..................................................................................................... 12
2.2 Notes on using the ventilation units safely .................................................................... 12
2.2.1 Fire protection ............................................................................................................... 12
2.2.2 Operationwithreplaces .............................................................................................. 12
2.2.3 Installation in wet areas ................................................................................................ 13
2.2.4 Condensate drain ......................................................................................................... 13
2.2.5 Starting and using the ventilation unit ........................................................................... 13
2.3 Notes on using the ventilation units .............................................................................. 13
2.4 Note on use in conjunction with room air conditioners ................................................. 14
2.5 Intended use ................................................................................................................. 14
3 Warranty and liability .................................................................................................. 15
3.1 Warranty ....................................................................................................................... 15
3.2 Liability .......................................................................................................................... 15
4 Dimensions ................................................................................................................. 16
4.1 Ventilation unit without duct adapters ........................................................................... 16
4.2 Ventilation unit with duct adapters ................................................................................ 17
5 Structure and function ............................................................................................... 18
5.1 Overview of the modules .............................................................................................. 18
5.1.1 Ventilation unit – with cover attached ........................................................................... 18
5.1.2 Ventilation unit – with cover removed ........................................................................... 18
5.2 Description of the functions .......................................................................................... 19
5.2.1 How the M-WRG-II ventilation unit works ..................................................................... 19
5.2.2 Howthecross-counterowplateheatexchangerworks .............................................. 20

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 3 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
6 Rules for correct usage .............................................................................................. 21
6.1 General ......................................................................................................................... 21
6.2 Seasonal operation ....................................................................................................... 21
6.2.1 Operation at cold times of year ..................................................................................... 21
6.2.2 Summer mode .............................................................................................................. 22
6.3 Airlters ........................................................................................................................ 22
7 Controls and indicators ............................................................................................. 23
7.1 Controls and indicators on the ventilation unit .............................................................. 23
7.1.1 Default assignment of the membrane touch pad .......................................................... 24
7.1.2 LED indicators on the ventilation unit ........................................................................... 25
7.2 Controls and indicators on the InControl pushbutton sensor ........................................ 26
7.2.1 InControl pushbutton sensor for type M-WRG-II P-T and M-WRG-II E-T units ............ 26
7.2.2 InControl pushbutton sensor for type M-WRG-II P-T-F and M-WRG-II E-T-F units ...... 26
7.2.3 InControl pushbutton sensor for type M-WRG-II P-T-FC and M-WRG-II E-T-FC units 27
7.2.4 Status indicators on the InControl pushbutton sensor .................................................. 27
7.3 Three-step rotary switch with zero position (provided by customer) ............................. 28
8 Starting up ................................................................................................................... 28
8.1 Checkingtheventilationunitbeforeswitchingonforthersttime ............................... 28
8.2 Switching on the ventilation unit ................................................................................... 28
9 Operating the ventilation unit .................................................................................... 29
9.1 Selecting the ventilation level/program ......................................................................... 29
9.2 Setting the ventilation unit to Standby mode ................................................................ 29
9.2.1 Activating Standby mode with the InControl pushbutton sensor .................................. 29
9.2.2 Activating Standby mode with the three-step rotary switch .......................................... 29
9.3 Optional pushbutton for intensive ventilation ................................................................ 30
9.4 Frost protection function ............................................................................................... 30
10 Ventilation levels/programs ....................................................................................... 31
10.1 “Reduced ventilation (people absent)” .......................................................................... 31
10.2 “Normal ventilation (people present)” ........................................................................... 31
10.3 “Increased ventilation” .................................................................................................. 31
10.4 “Intensive ventilation (temporary 15 min)” .................................................................... 31
10.5 “Supply air operation (summer mode)” ......................................................................... 31
10.6 “Extract air operation” ................................................................................................... 31
10.7 “Humidity control” .......................................................................................................... 32
10.8 “CO2control” ................................................................................................................. 32
10.9 “Automatic mode” ......................................................................................................... 32
11 Options for ventilation mode ..................................................................................... 33
11.1 External control input .................................................................................................... 33
11.1.1 Description .................................................................................................................... 33
11.1.2 Factory defaults and possible adjustment ranges ........................................................ 33
11.1.3 M-WRG-II O/EST-1, part no. 721005, and M-WRG-II O/EST-2, part no. 721006 ........ 33
11.2 M-WRG-II O/PARM, part no. 721000 ............................................................................ 33
11.3 M-WRG-II O/MVS, part no. 721001 .............................................................................. 34
11.4 M-WRG-II O/VOC-AUL, part no. 721002 ...................................................................... 34
11.5 M-WRG-II O/EGG-AUS, part no. 721003 ..................................................................... 34
11.6 M-WRG-II O/NOF, part no. 721004 .............................................................................. 34
11.7 M-WRG-II O/LFS, part no. 721007 ............................................................................... 35
11.7.1 Description .................................................................................................................... 35
11.7.2 Factory defaults ............................................................................................................ 35

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 4 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
12 Filter maintenance ...................................................................................................... 36
12.1 Choiceoflter ............................................................................................................... 36
12.2 Orderinglters .............................................................................................................. 36
12.3 Changingtheairlters .................................................................................................. 37
12.3.1 Removing the cover from the ventilation unit ................................................................ 37
12.3.2 Removingtheextractairlter ....................................................................................... 37
12.3.3 Removingtheoutdoorairlter ...................................................................................... 38
12.3.4 Insertingthenewextractairlter .................................................................................. 38
12.3.5 Insertingthenewoutdoorairlter ................................................................................ 39
12.3.6 Attaching the unit cover to the ventilation unit .............................................................. 39
12.3.7 Resettingthelterchangeindicator ............................................................................. 40
13 Cleaning ....................................................................................................................... 40
14 Troubleshooting .......................................................................................................... 41
15 Installing the InControl pushbutton sensor ............................................................. 42
15.1 Switching off power to the ventilation unit ..................................................................... 42
15.2 Removing the cover from the ventilation unit ................................................................ 43
15.3 Removing the electronics compartment cover plate ..................................................... 43
15.4 Overview of the modules .............................................................................................. 44
15.4.1 Connection board in the ventilation unit with terminal assignment ............................... 44
15.4.2 InControl pushbutton sensor ......................................................................................... 45
15.4.3 Connection diagram ...................................................................................................... 45
15.5 Connection of 1 ventilation unit ..................................................................................... 46
15.5.1 Connecting the InControl pushbutton sensor to M-WRG-II P-T / M-WRG-II E-T .......... 46
15.5.2 Connecting the InControl pushbutton sensor to M-WRG-II P-T-F / M-WRG-II E-T-F ... 47
15.5.3 Connecting the InControl pushbutton sensor to
M-WRG-II P-T-FC / M-WRG-II E-T-FC ......................................................................... 48
15.6 Connection of 2 to 5 ventilation units ............................................................................ 49
15.6.1 Connecting the InControl pushbutton sensor to M-WRG-II P-T / M-WRG-II E-T .......... 49
15.6.2 Connecting the InControl pushbutton sensor to M-WRG-II P-T-F / M-WRG-II E-T-F ... 50
15.6.3 Connecting the InControl pushbutton sensor to M-WRG-II P-T-FC /
M-WRG-II E-T-FC ......................................................................................................... 50
15.7 Final tasks ..................................................................................................................... 51
16 Installing the three-step rotary switch with zero position ...................................... 52
16.1 Switching off power to the ventilation unit ..................................................................... 52
16.2 Removing the cover from the ventilation unit ................................................................ 53
16.3 Removing the electronics compartment cover plate ..................................................... 53
16.4 Overview of the modules .............................................................................................. 54
16.4.1 Connection board in the ventilation unit with terminal assignment ............................... 54
16.4.2 Three-step rotary switch with zero position .................................................................. 54
16.4.3 Optional pushbutton for intensive ventilation and optional LED for feedback ............... 54
16.5 Setting DIP switch 2 to the “Schalter (switch)” position ................................................ 55
16.6 Connecting the control cable and optional pushbutton/LED to the ventilation unit
boards ........................................................................................................................... 55
16.6.1 Terminal assignment (example of a BUSCH-JAEGER three-step rotary switch with
zero position) ................................................................................................................ 55
16.6.2 Circuit diagram (example of a BUSCH-JAEGER three-step rotary switch with zero
position) ........................................................................................................................ 56
16.7 Final tasks ..................................................................................................................... 57

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 5 -
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 these operating and installation instructions
These original operating and installation instructions contain important information
that should be followed when setting up and using the M-WRG-II P-T (-F, -FC) and
M-WRG-II E-T (-F, -FC) ventilation units and when installing the InControl pushbutton
sensor and three-step rotary switch with zero position.
►Read all the instructions carefully before starting up the ventilation unit 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 section “2 Safety instructions” on page 12 carefully.
1.2 Description
These instructions describe how to set
up and operate the decentralised venti-
lation units M-WRG-II P-T (-F, -FC) and
M-WRG-II E-T (-F, -FC) (see Fig. 1).
They also explain how to connect the
InControl pushbutton sensor and the
three-step rotary switch with zero posi-
tion electrically to the ventilation unit.
M-WRG stands for Meltem heat
recovery. Home ventilation expertise
extending back nearly 40 years has
been incorporated into this product from
Meltem Wärmerückgewinnung.
Using windows for ventilation, particu-
larly during periods of cold weather, is
now a thing of the past. This ventilation
unit brings in outdoor air fully automat-
ically, and heats it by recovering heat
from the air that is extracted. Outdoor
airandextractairareroutedinseparateductsthroughacross-counterowplateheat
exchanger (see section 5.2.2 on page 20). You save on heating costs, increase
your living comfort and are kind to the environment by reducing CO2emissions. An air
lteralsoremovesrespirableparticulatessuchaspollen,sootandbacteriafromdust
class PM1 from the outdoor air. It is also possible to monitor the outdoor air quality
Fig. 1: M-WRG-II P-T / M-WRG-II E-T ventilation unit

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 6 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
with a VOC sensor; if the air load is high (e.g. due to biological decay and decompo-
sitionprocesses,motortrafcexhaustfumesorvolatileby-productsfromindustrial
and commercial operations) the proportion of supply air can be reduced temporarily
until the available outdoor air quality has improved (only for units with a CO2sensor,
specicallyM-WRG-II...-T-FCunits).
The ventilation units are designed to run continuously and can be equipped with sensors
fordemand-controlledventilation.Theycanbesurface-mounted,ush-mountedorinte-
grated into the wall (U2). The ventilation units are low-maintenance, but regular air lter
changes are important.
The ventilation units from the M-WRG-II P-T and M-WRG-II E-T series are equipped with
an interface to which an InControl pushbutton sensor, a three-step rotary switch with zero
position and an optional pushbutton for activating an intensive ventilation program may be
connected. This allows the ventilation units to be operated both via the InControl push-
button sensor or three-step rotary switch and via the membrane touch pad on the unit.
The 5 buttons on the membrane touch pad on the side of the unit are used to set different
ventilation levels / programs and a time-limited intensive ventilation program. It therefore
allowsyoutoadapttheairowtoyourneeds.
Beside each button is an LED that displays the active ventilation program and further
informationabouttheunit’sstatus(airlterchange,fault,etc.).
The ventilation units from the M-WRG-II P-T and M-WRG-II E-T series are equipped with
heatexchangersthatworkonthecross-counterowprinciple.M-WRG-IIE-Talsohasa
function for recovering moisture from the extract air (enthalpy heat exchanger).
The M-WRG-II P-T-F and M-WRG-II E-T-F ventilation units have various ventilation
levels / programs, including a humidity control. In addition to the humidity control,
M-WRG-II P-T-FC and M-WRG-II E-T-FC units have a CO2control or an automatic
mode (humidity and CO2control). The CO2value is the most important measurement for
assessing the air quality. A microprocessor integrated into the unit calculates the optimum
air renewal from the values measured by the relative humidity and CO2sensors and sets
the correct ventilation level fully automatically.
1.2.1 InControl pushbutton sensor
Onetoveventilationunitsofthesame
type can be controlled in a room with
one InControl pushbutton sensor. Six
different ventilation programs can be
selected. The LEDs integrated into the
pushbutton sensor indicate the currently
active ventilation program and whether
anairlterreplacementisrequiredora
fault message is pending.
Fig. 2: InControl pushbutton sensor M-WRG-T/...
CO²

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 7 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
1.2.2 Three-step rotary switch with zero position
The ventilation unit can be operated via a three-step rotary switch with zero position
(provided by the customer). A suitable example is available from BUSCH-JAEGER or
GIRA.
The three-step rotary switch is used to select one of three different ventilation programs.
In the zero position, the ventilation unit is in standby mode.
1.2.3 Optional pushbutton for intensive ventilation
In addition to the three-step rotary switch, an optional pushbutton may be installed for
activating 15 minutes of intensive ventilation at maximum power level.
1.2.4 Optional accessories
Part no. Type Description
5478-10 M-WRG-FBH The wireless remote control is used to control, program and
extend the range of functions of all M-WRG-II units. It can
also be used to read the number of operating hours.
5478-20 M-WRG-FT The 4-way wireless pushbutton switch with LED feedback
allows the M-WRG-II units to be operated wirelessly.
5478-11 M-WRG-ALGH The mobile reader is used to read the number of hours for
which the M-WRG-II units have been in use.
Table 1: Optional accessories
1.3 Target group
These operating and installation instructions are aimed at two target groups:
— Chapters “1 Introduction” to “14 Troubleshooting” are intended for users of the ventila-
tion unit. No special prior knowledge is needed.
— The activities described in chapters “15 Installing the InControl pushbutton sensor”
and “16 Installing the three-step rotary switch with zero position” must only be carried
outbytechnicians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 EU declaration of conformity
The ventilation units from the M-WRG-II P and M-WRG-II E series manufactured by
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4
82239 Alling
conform to the regulations and standards listed in the EU Declaration of Conformity
provided.

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 8 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
1.5 National technical approval (for Germany)
An application for a national technical approval is made to the Deutsches Institut für
Bautechnik (DIBt), quoting reference III 57-1.51.3-57/17.
►For installation outside Germany, the national regulations applicable in your country
should be followed.
1.6 Nameplate
Youwillndthenameplateonthe
intermediate plate on the inside of the
housing (see item 1 in Fig. 4).
Fig. 3: Nameplate
Fig. 4: Position of the nameplate
1

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 9 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
1.7 Technical data
1.7.1 Electrical connection
Unit types M-WRG-II P-T /
M-WRG-II E-T
M-WRG-II P-T (-F, -FC) /
M-WRG-II E-T (-F, -FC)
Operating voltage 230 V AC
(working voltage range: 85 V AC to 265 V AC)
Mains frequency 50 to 60 Hz
Power consumption 4.6 to 52.4 W / 4.4 to 53.4 W
Power consumption in
standby mode
0.8 W
Maximum current consumption 0.42 A
IP code IPX4
IPX5 with Integrated into wall U² installation
version
Energyefciencyclass(ErP) B A
1.7.2 Dimensions and weight
Unit dimensions excluding air connectors,
see also section 4 on page 16
364 x 590 x 218 mm (W x H x D)
Visible unit depth when surface-mounted 218 mm
Visibleunitdepthwhenush-mounted 58 mm
Visible unit depth when integrated into wall -
Outdoor air/exhaust air connectors DN 100
Weight Approx. 8.3 kg
1.7.3 Noise emission
Sound pressure level LP,A surface-mount 17.5 to 48.1 dB(A)/Aeq 10 m2
Sound pressure level LP,Aush-mountor
with ductwork connection on extract air side
13.0 to 48.6 dB(A)/Aeq 10 m2or
12.6 to 46.4 dB(A)/Aeq 10 m2
Sound pressure level LP,A integrated into wall
U2with ductwork connection on extract air
side
8.4 to 42.1 dB(A)/Aeq 10 m2
Sound insulation Dn,e,w unit in use
depending on installation version
51 to 70 dB

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 10 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
1.7.4 Unit properties
Unit types M-WRG-II P-T /
M-WRG-II E-T
M-WRG-II P-T (-F, -FC) /
M-WRG-II E-T (-F, -FC)
Type of system Decentralised, heat recuperation
Airow 10 to 100 m3/h
Heatrecoveryefciency(max.),
DIN EN 13141-8
Up to 94% / 91%
Colour White similar to RAL 9010
TÜV-tested Yes
Hygiene tested for conformity
with VDI 6022 sheet 1
W-304132-18-WD
Passivhauscerticate(PHI) 1327vs03 / 1328vs03
National technical approval (DIBt) Applied for, reference number: III 57-1.51.3-57/17
1.7.5 Unit features
Unit types M-WRG-II P-T /
M-WRG-II E-T
M-WRG-II P-T (-F, -FC) /
M-WRG-II E-T (-F, -FC)
Output control 5-level on the
unit, 10-level
with accessories
5-level on the unit, 10-level with
accessories,innitelyvariable
with humidity/CO2sensors
Interface for connecting
external controls
InControl pushbutton sensor, three-step rotary
switch with zero position, pushbutton for intensive
ventilation
Supply air / exhaust air fan EC direct current radial fan
Heat exchanger Cross-counterowplateheatexchanger,on
M-WRG-II E-T (-F, -FC) with enthalpy
Filter monitoring with
lterchangeindicator
Runtime-controlled, visual
Condensate drain Via condensate connection / not required*
Fullyautomaticcoverapcontrol
when switching On / Off, in
Standby mode and if the power
fails
Yes
Frost protection function Yes
“Unit OFF” input (smoke detector,
window contact)
Optional
Fault indicator output Optional
Operating hours display Using optional accessories
(see section 1.2.4 on page 7)
Humidity control No Yes
CO2control / automatic mode
(humidity and CO2control)
No With -T-FC units
Filter type Roundltercartridgesforoutdoorairandextractair
* Intended usage as described in operating instructions, not exposed to excessive humidity

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 11 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
1.7.6 Air lters
Designation Filter class
Outdoorairlter ISO ePM1 60% (F7)
Activatedcharcoallterforoutdoorair(optional) ISO ePM2,5 55% (F7)
Extractairlter ISO Coarse 60% (G4)
1.8 Storage
►Store the ventilation unit in its original packaging in a dry place where the temperature
ranges between 0 °C and +40 °C.
1.9 Environmentally-friendly disposal
The ventilation units must not be disposed of in the residual waste bin.
►Dispose of the ventilation unit in accordance with the waste disposal regulations that
apply on site.
1.10 Revision index
Edition Manual Date
2nd edition Operating and installation instructions for
M-WRG-II P-T (-F, -FC) and M-WRG-II E-T (-F, -FC)
ventilation units
Week 43/2019 EN
1.11 Explanation of the symbols used
►This symbol indicates an action to be taken.
— This symbol indicates a list.
1.12 Supplementary documents
Manual Part no.
Installationmanualforush-mountinstallationkitwithplasteringtrim
(solid construction) M-WRG-II M/MB
744001EN
Installationmanualforush-mountinstallationkitM-WRG-IIM(frame
construction)
744002EN
Installationmanualforush-mountinstallationkitM-WRG-IIM-U2744003EN
Installation manual for M-WRG-II ventilation units 744004EN
Installation manual for outer wall terminals M-WRG-II ES (-P, -PK) 744005EN
Installation manual for window reveal installation kit 744006EN
User guide for wireless remote control M-WRG-FBH 5302-25-01
User guide for mobile operating hours reader M-WRG-ALGH 5302-26-01
Installation instructions and user guide for 4-way wireless pushbutton
switch M-WRG-FT
5301-14-01
Table 2: Supplementary documents

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 12 -
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
These instructions contain 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 differential 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.

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 13 -
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 installation manuals for installation kits and ventilation units in section 1.12 on
page 11).
— 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 14) and chapter “6 Rules for correct usage” on page 21.
— 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operatetheventilationunitwiththeairlterstted.
— 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.

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 14 -
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change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 external 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 different 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 offers no warranty that the
ventilation unit will work perfectly and correctly.

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 15 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
3 Warranty and liability
3.1 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.
3.2 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.

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 16 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
4 Dimensions
4.1 Ventilation unit without duct adapters
Fig. 5: M-WRG-II ventilation unit without duct adapters, dimensions in millimetres
40
364
590
58
160
218
125
210
194,5
149

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 17 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
4.2 Ventilation unit with duct adapters
Fig. 6: M-WRG-II ventilation unit with duct adapters, dimensions in millimetres
40
218
364
610
590
58
160
208,5
125
210
194,5
149

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 18 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
5 Structure and function
5.1 Overview of the modules
5.1.1 Ventilation unit – with cover attached
Item in Fig. 7 Designation
1 Housing
2 Unit cover
3 Membrane touch pad with 5 buttons for selecting the ventilation
levels / programs and 5 status indicator LEDs
5.1.2 Ventilation unit – with cover removed
Item in Fig. 8 Designation
1 Supply air grille
2Outdoorairlterwithltercover
3 Mains switch “On / Off”
4Extractairlterwithlterring
5 Extract air grille
Fig. 7: Ventilation unit – with cover attached
1
2
3
Fig. 8: Ventilation unit – with cover removed
1
3
2
4
5

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 19 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
5.2 Description of the functions
5.2.1 How the M-WRG-II ventilation unit works
1
2
3
4
5
6
Fig. 9: How the ventilation unit works Fig. 10: Components for air exchange
1
2
3
4
5
Item in
Fig. 9
Designation Item in
Fig. 10
Designation
1 M-WRG-II ventilation unit 1 Extractairlter
2 Supply air 2 Supply air fan
3 Extract air 3 Cross-counterowplateheat
exchanger
4 Outdoor air 4 Exhaust air fan
5 Exhaust air 5 Outdoorairlter
6 Outer wall terminal
The ventilation unit operates continuously, transports outdoor air and extract air at the
sametimeandguidesandlterstheoutdoorairandextractairseparately.Theself-reg-
ulatingfans(whichensureaconstantvolumetricowrate)arearrangedonthesupply
air and exhaust air sides. The supply air fan (item 2 in Fig. 10) transports outdoor air
(item4inFig.9)throughtheoutdoorairlter(item5inFig.10)andcross-counterow
plate heat exchanger (item 3 in Fig. 10) into the interior as supply air (item 2 in Fig. 9).
The exhaust air fan (item 4 in Fig. 10) extracts the extract air (item 3 in Fig. 9) from the
interior.Intheextractairlter(item1inFig.10),theextractairiscleaned,guidedthrough

Operating and installation instructions
M-WRG-II P-T (-F, -FC), M-WRG-II E-T (-F, -FC) ventilation units
- 20 -
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
VENTILATION & HEAT RECOVERY
thecross-counterowplateheatexchangerandcarriedoutsideasexhaustair(item5in
Fig. 9). The supply air and exhaust air fans each transport the same volume of air. The
pressure in the interior remains practically constant.
5.2.2 How the cross-counterow plate heat exchanger works
Thechannelsonthecross-counterow
plate heat exchanger (item 1 in Fig. 11)
aredesignedsothattheairowsmove
in opposite directions. This guaran-
tees the greatest possible exchange of
thermal energy.
In the winter, the highly thermally
conductive plates transfer the heat from
theextractairow(item2inFig.11)to
thesupplyairow(item3inFig.11).The
cooled extract air is carried to the outside
as exhaust air (item 4 in Fig. 11).
In the summer, this is reversed; the
warmer, incoming air is cooled.
Item Designation
1Cross-counterowplateheat
exchanger
2 Extract air
3 Supply air
4 Exhaust air
5 Outdoor air
1
2 3
45
Fig. 11: Howthecross-counterowplateheat
exchanger works