background image

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 first 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 

flashes 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 flashes green.

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

CO

2

 concentration below 800 ppm

Yellow

Lights up

CO

2

 concentration between 800 ppm and 

1900 ppm

Red

Lights up

CO

2

 concentration above 1900 ppm

Red

Flashes 1x No wireless connection to the ventilation 

unit

Red

Flashes 2x The air filters 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

I

Vent. level 

I

: 10 / 20* m

3

/h

Vent. level 

I

: 15 / 20* m

3

/h

II

Vent. level 

II

: 30 / 40* m

3

/h

Vent. level 

II

: 30 / 40* m

3

/h

III

Vent. level 

III

: 50 / 60* m

3

/h

Vent. level 

III

: 60 m

3

/h

Auto

CO

2

 control or  

automatic mode (only for units with humidity sensor)

Intensive ventilation 100 m

3

/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) flashes white.

 

► Release the control button. The wireless sensor switches to 

connection mode and the status LED flashes green-red.

 

► Tap the control button again. The ventilation unit gives an 

audible signal when the connection is established and the status 

LED flashes green.

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.

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