Meltem M-WRG-II FSF Mounting instructions

VENTILATION & HEAT RECOVERY
INSTALLATION INSTRUCTIONS AND
USER GUIDE
Part no. 744011EN, Week 47/2019 EN
External wireless humidity sensor
M-WRG-II FSF
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Fig. 1: External wireless humidity sensor
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 humidity sensor.
►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 humidity sensor 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 humidity level at an installation location selected
by you, provided that it is within the wireless range. The “Humidity
control” and “Automatic mode” ventilation programs use the
transmitted values to automatically adjust the unit’s air ow to the
required ventilation level. One wireless humidity sensor may be
linked to each ventilation unit. If the ventilation unit has an internal
humidity sensor, it will be automatically disabled. The wireless
humidity sensor incorporates the humidity control function into
ventilation units without an internal humidity sensor. 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 relative room air humidity exceeds
60 % RH (factory setting) in the “Humidity control” or “Automatic
mode” ventilation program, the ventilation level is increased contin-
uously up to max. 60 m3/h until the humidity in the room drops back
below 60 % RH.
The wireless sensor is xed to the wall with the dowels and screws
provided (see section 4.1).
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 humidity sensor 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 FSC wireless CO2
sensor and in conjunction with the U2installation version and all
M-WRG-II and M-WRG covers.
1.3 Target group
These instructions are intended for users of the wireless humidity
sensor. No special prior knowledge is needed.
1.4 EU declaration of conformity
The wireless humidity sensor described below
Type: M-WRG-II FSF
Part number: 733010
manufactured by
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4
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 40 °C
Relative humidity 0 % to 90 %,
non-condensing
IP code (IEC 60529) IP30
Battery
Size AA, Mignon
Lifetime approx. 2 years
Wireless connection
Communication frequency 868.3 MHz
Output power at least 0 dBm
Data logging
Measurement range 0 % to 100 % RH
Measurement accuracy
at 11 % to 89 % RH 3 % RH
Measurement resolution 1 % RH
Measurement stability over 5 years 1.5 % RH
1.6 Environmentally-friendly disposal
The components of the wireless humidity sensor 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.
►In Germany, rechargeable batteries and accumulators should
be disposed of in accordance with the Batteries Act (BattG). The
national implementation of the Battery Directive 2006/66/EC
should be followed in other EU states.
►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 humidity sensor is approved only for use in dry interior
areas and must be protected against humidity and moisture to
prevent short-circuits.
2.1 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.
2.2 Intended use
The wireless humidity sensor 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
— M-WRG-II FSF wireless humidity sensor
— 2x 1.5 V battery, size AA, Mignon
— 2x screws and dowels
4 Installation and set-up
NOTICE
Never install the wireless humidity sensor in a metal enclosure,
otherwise wireless communication between the wireless sensor
and ventilation unit will not be possible.
4.1 Fixing the housing to the wall
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4
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Fig. 2: Fixing the housing to the wall
►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 the screws (item 4 in Fig. 2) and dowels provided to x the
housing in the desired position.
4.2 Inserting the batteries and attaching the cover
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Fig. 3: Inserting the batteries and attaching the cover
►Insert the batteries (item 1 in Fig. 3) in the battery holders
(item 2 in Fig. 3) on the back of the cover.
All the LEDs light up for 3 seconds when the batteries are
inserted. The wireless sensor then switches automatically to
connection mode and the status LED ashes green-red.
NOTICE
Make sure that the battery polarity is correct. A sticker beside the
battery holders shows the correct battery orientation.
►Insert the tabs on the cover into the cutouts in the housing.
►Swivel the cover down until you hear it snap into place in the
housing (see Fig. 3).
4.3 Connecting to the ventilation unit for the rst time
►Switch the ventilation unit on. It remains in connection mode for
2 minutes.
NOTICE
When it is supplied, the wireless sensor is automatically set to
connection mode (status LED ashes green-red).
►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
ashes
Description
Green 1x The ventilation unit has received and is
carrying out the command
Red 1x No wireless connection to the ventilation unit
Red 2x The air lters in the ventilation unit need to be
changed
Red 3x Error message from the ventilation unit
Red 4x The wireless sensor is faulty
Red 5x The batteries need to be changed
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 Humidity control or
automatic mode (only for units with CO2sensor)
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 Changing the batteries
►The illustration in section 4 shows how to change the batteries.
7 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.