Meltem M-WRG-II FSC Mounting instructions

VENTILATION & HEAT RECOVERY
INSTALLATION INSTRUCTIONS AND
USER GUIDE
Part no. 744012EN, Week 47/2019 EN
External wireless CO2sensor
M-WRG-II FSC
1
23
Fig. 1: External wireless CO2sensor
Item in Fig. 1 Description
1Control button (touch-sensitive)
2Status LED
3Mode LEDs (5x)
1 Introduction
1.1 Notes on these instructions
These instructions contain important information that
should be followed when installing and using the wire-
less CO2sensor.
►Read all the instructions carefully to avoid possible risks and
mistakes.
►These instructions are part of the product. Keep the instructions
in a safe place for future reference.
NOTICE
►When operating the ventilation unit, also follow the operating
instructions that were supplied with your unit.
1.2 Description
The wireless CO2sensor is used for wireless operation of ventilation
units from the M-WRG-II and M-WRG series constructed from 2020
onwards (excluding bus unit types). It can also be used to determine
the CO2concentration at an installation location selected by you,
provided that it is within the wireless range. The “CO2control” and
“Automatic mode” ventilation programs use the transmitted values
to automatically adjust the unit’s air ow to the required ventilation
level. One wireless CO2sensor may be linked to each ventilation
unit. If the ventilation unit has an internal CO2sensor, it will be auto-
matically disabled. The wireless CO2sensor incorporates the CO2
control function into ventilation units without an internal CO2sensor.
The control button (item 1 in Fig. 1) is used to activate ve different
ventilation levels/programs. The current selection is indicated by
one of the ve green mode LEDs (item 3 in Fig. 1). The multi-
coloured status LED (item 2 in Fig. 1) signals the wireless sensor
and ventilation unit operating statuses. If the CO2concentration
exceeds 800 ppm (factory setting) in the “CO2control” or “Automatic
mode” ventilation program, the ventilation level is increased contin-
uously up to max. 60 m3/h until the CO2concentration in the room
drops back below 800 ppm. When it is started for the rst time, the
wireless CO2sensor takes 2 minutes to calibrate itself so that it can
return stable values.
The wireless sensor is xed to the wall with the dowels and screws
provided (see section 4.1). A 230 V connection is needed for oper-
ation.
The optional M-WRG-FBH wireless remote control, part no. 5478-10 ,
can be used to program the functions of the wireless sensor. You
will nd more details in the “User guide for wireless remote control
M-WRG-FBH”. The wireless CO2sensor can also be used in parallel
with the M-WRG-FBH wireless remote control, M-WRG-FT 4-way
wireless pushbutton switch and M-WRG-II FSF wireless humidity
sensor and in conjunction with the U2installation version and all
M-WRG-II and M-WRG covers.
1.3 Target group
These installation and operating instructions are aimed at two target
groups:
The activities described in chapter “4 Installation and set-up” 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
The other chapters of this document are intended for users of the
wireless CO2sensor. No special prior knowledge is needed.
1.4 EU declaration of conformity
The wireless CO2sensor described below
Type: M-WRG-II FSC
Part number: 733011
manufactured by
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4
D-82239 Alling
conforms to the regulations and standards listed in the EU Declara-
tion of Conformity.
1.5 Technical data
Product characteristics
Dimensions (W x H x D) 100 mm x 100 mm x 25 mm
Weight approx. 125 g
Colour white, similar to RAL 9010
Material of the plastic parts ABS
Ambient conditions
Ambient temperature during
operation
0 °C to 40 °C
Ambient temperature for storage and
shipping
-20 °C to 55 °C
Relative humidity 0 % to 90 %,
non-condensing
IP code (IEC 60529) IP30
Electrical connection
Operating voltage 195 V AC to 253 V AC
Mains frequency 50 Hz
Maximum power consumption 4 W
Cable cross-section 0.25 mm2to 2.5 mm2
Wireless connection
Communication frequency 868.3 MHz
Output power at least 0 dBm
Data logging
Measurement range 400 ppm to 2,000 ppm
Measurement accuracy (within the
measurement range, >10 minutes
after switching on)
40 ppm + 2 % of the
measured value at 20 °C
Time taken to achieve measurement
stability after switching on
2 min

1.6 Environmentally-friendly disposal
The components of the wireless CO2sensor must not be
disposed of in the residual waste bin.
►In Germany, metal and plastic components should be disposed
of at the local recycling centre. The national regulations in other
EU states should also be followed.
►In Germany, electrical components should be disposed of in
accordance with the Electrical and Electronic Equipment Act
(ElektroG). In other EU states, the national implementation of the
Waste Electrical and Electronic Equipment Directive 2012/19/EU
(WEEE) should be followed.
► The regulations and statutory requirements in your own country
concerning disposal should also be followed.
1.7 Explanation of the symbols used
►This symbol indicates an action to be taken.
— This symbol indicates a list.
2 Safety
The wireless CO2sensor is approved only for use in dry interior
areas and must be protected against humidity and moisture to
prevent short-circuits. Parts of the wireless CO2sensor carry poten-
tially fatal voltages.
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 operation
This unit may be used by children from 8 years old and by persons
of restricted physical, 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 associ-
ated 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.
2.3 Intended use
The wireless CO2sensor must only be used to operate M-WRG-II
and M-WRG ventilation units. 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 these instructions.
For any use contrary to the intended use, Meltem Wärmerückge-
winnung GmbH & Co. KG shall accept no liability for any damage
that may occur and offers no warranty that the components will work
perfectly and correctly.
3 Items supplied
— Wireless CO2sensor M-WRG-II FSC
— 2x screws and dowels
4 Installation and set-up
DANGER
The activities described in this chapter must only be carried out by
specialised personnel (see section 1.3).
NOTICE
Never install the wireless CO2sensor in a metal enclosure, other-
wise wireless communication between the wireless sensor and
ventilation unit will not be possible.
4.1 Removing the cover and safety cover plate
1
2
3
4
5
Fig. 2: Removing the cover and safety cover plate
►Press the tab (item 1 in Fig. 2) on the underside of the housing
(item 3 in Fig. 2) and pull the cover (item 2 in Fig. 2) away from
the housing.
► Use a small at-bladed screwdriver to press the latch (item 4 in
Fig. 2) and lift up the safety cover plate (item 5 in Fig. 2).
4.2 Introducing the mains cable and xing the housing
to the wall
DANGER
Potentially fatal voltages
— The electrical installation work must only be carried out by a
qualied electrician.
— The VDE regulations or any special safety regulations appli-
cable in your country apply to the electrical installation work.
►Before starting installation or maintenance work, disconnect
the mains cable for connecting to the wireless CO2sensor on
all poles from the mains supply.
► Observe the ve safety rules (DIN VDE 0105-100,
EN 50110-1) for working on electrical 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
4
5
1
2
3
4
Fig. 3: Introducing the mains cable and xing the housing to the
wall
►Introduce the mains cable into the housing (item 4 in Fig. 3)
from behind (item 1 in Fig. 3) or from below (item 2 in Fig. 3). If
appropriate, break out the plastic tabs (item 3 in Fig. 3) on the
bottom cable inlet.
► Use the screws and dowels provided (item 5 in Fig. 3) to x the
housing in the desired position.

4.3 Connecting the mains cable and attaching the
cover
3
1
2
Fig. 4: Connecting the mains cable and attaching the cover
►Connect the mains cable (item 1 in Fig. 4) to the terminals
(item 2 in Fig. 4).
►Lower the safety cover plate (item 5 in Fig. 2) until you hear it
latch into place.
►Insert the tabs on the cover (item 3 in Fig. 4) into the cutouts in
the housing.
►Swivel the cover down until you hear it snap into place in the
housing (see Fig. 3).
4.4 Connecting to the ventilation unit for the rst time
►Re-establish the 230 V power supply to the wireless sensor.
All the LEDs light up for 3 seconds. The wireless sensor then
switches automatically to connection mode and the status LED
ashes green-red.
►Switch the ventilation unit on. It remains in connection mode for
2 minutes.
►Tap the control button (item 1 in Fig. 1). The ventilation unit gives
an audible signal when the connection is established and the
status LED ashes green.
5 Operation
5.1 Checking the status / Selecting the ventilation
level/program
►Tap the control button (item 1 in Fig. 1) to check the current
status. This is signalled by the status LED (item 2 in Fig. 1) and
the mode LEDs (item 3 in Fig. 1).
►Tap the control button again while the status and mode LEDs
are lit to switch between the different ventilation levels/programs.
Your current selection is indicated by the mode LED beneath the
I, II, III, Auto or symbol.
5.2 Status LED
The status LED (item 2 in Fig. 1) provides the following feedback
when the control button (item 1 in Fig. 1) is pressed:
LED
colour
LED state Description
Green Flashes 1x The ventilation unit has received and is
carrying out the command
Green Lights up CO2concentration below 800 ppm
Yellow Lights up CO2concentration between 800 ppm and
1900 ppm
Red Lights up CO2concentration above 1900 ppm
Red Flashes 1x No wireless connection to the ventilation
unit
Red Flashes 2x The air lters in the ventilation unit need to
be changed
Red Flashes 3x Error message from the ventilation unit
Red Flashes 4x The wireless sensor is faulty
5.3 Mode LEDs
The green mode LEDs (item 3 in Fig. 1) indicate which ventilation
level or ventilation program is selected.
Mode
LED
Ventilation levels/programs (factory default settings)
M-WRG-II M-WRG
IVent. level I: 10 / 20* m3/h Vent. level I: 15 / 20* m3/h
II Vent. level II: 30 / 40* m3/h Vent. level II: 30 / 40* m3/h
III Vent. level III: 50 / 60* m3/h Vent. level III: 60 m3/h
Auto CO2control or
automatic mode (only for units with humidity sensor)
Intensive ventilation 100 m3/h for 15 min
* Options M-WRG-II O/LFS, M-WRG-II O/MVS or M-WRG O/LFS,
M-WRG O/MVS change the button assignment
5.4 Connecting to the ventilation unit again
►Switch the ventilation unit on. It remains in connection mode for
2 minutes.
►Tap the control button (item 1 in Fig. 1) several times until the
green Auto mode LED lights up.
►Hold down the control button until the status LED (item 2 in
Fig. 1) ashes white.
►Release the control button. The wireless sensor switches to
connection mode and the status LED ashes green-red.
►Tap the control button again. The ventilation unit gives an
audible signal when the connection is established and the status
LED ashes green.
6 Cleaning
Wipe the outer surfaces from time to time with a soft, damp cloth.
Use mild soapy water. Never use acidic, corrosive or abrasive
cleaning agents.

Space for your notes