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1.6  Environmentally-friendly disposal

The components of the wireless CO

2

 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.

 

► 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. 

Safety

The wireless CO

2

 sensor 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 CO

2

 sensor carry poten-

tially fatal voltages.

2.1  Hazard classification

 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 CO

2

 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.

Items supplied

 

— Wireless CO

2

 sensor M-WRG-II FSC

 

— 2x screws and dowels

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 CO

2

 sensor 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 flat-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 fixing the housing 

to the wall

 DANGER

Potentially fatal voltages

 

— The electrical installation work must only be carried out by a 

qualified 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 CO

2

 sensor on 

all poles from the mains supply.

 

► Observe the five 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 fixing 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 fix the 

housing in the desired position.

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