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V E N T I L A T I O N   &   H E A T   R E C O V E R Y

INSTALLATION INSTRUCTIONS AND 

USER GUIDE

Part no. 744013EN, Week 03/2020 EN

Gateway M-WRG-GW

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Fig. 1:  Gateway M-WRG-GW

Item in Fig. 1

Description

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Wireless connection LED

2

Network LED

3

Power LED

4

Reset button

5

Power supply connection

6

Ethernet connection

Introduction

1.1  Notes on these instructions

These instructions contain important information that 

should be followed when installing the M-WRG-GW 

gateway.

 

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 M-WRG-GW gateway is used for cloud-based operation of 

ventilation units from the M-WRG-II and M-WRG series constructed 

from 2020 onwards (excluding bus unit types) via an iOS or Android 

app. The gateway forms the interface between the ventilation unit(s) 

and the Meltem app. It can be used to control, program and read 

the units decentrally, centrally on site or online from anywhere in the 

world. It is used to create time programs for different controllers to 

suit the unit configuration. The user can also program various unit 

functions and sensors. The app is used to create a personal user 

account for configuring and managing the gateway. Communication 

between the gateway and ventilation units is also established and 

controlled via the app. Data protection has top priority; the data is 

fully encrypted and can only be released by the user. Up to 20 units 

may be logged into a gateway; the number is only limited by the 

wireless range. 

The following components are needed to control the ventilation units 

using the app:

 

— Ventilation units from the M-WRG-II and M-WRG series 

constructed from 2020 onwards (excluding bus unit types)

 

— Smartphone or tablet, iOS or Android operating system

 

— Meltem app

 

— M-WRG-GW gateway with Meltem cable and mains adapter

 

— Router with Internet access (provided by the customer)

The gateway can also be used in parallel with the M-WRG-FBH 

wireless remote control, M-WRG-FT 4-way wireless pushbutton 

switch, M-WRG-II FSF wireless humidity sensor and M-WRG-II FSC 

wireless CO

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 sensor and in conjunction with the U

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 installation 

version and all M-WRG-II and M-WRG covers.

1.3  Target group

These instructions are intended for users of the M-WRG-GW 

gateway. No special prior knowledge is needed.

1.4  EU declaration of conformity

The gateway described below

  Type: M-WRG-GW 

  Part number: 5453-00

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)

105 mm x 80 mm x 25 mm

Weight

approx. 90 g

Colour

white, similar to RAL 9010

Material of the plastic parts

ABS

Ambient conditions

Ambient temperature during 

operation

0 °C to 50 °C

Ambient temperature for storage 

and shipping

-25 °C to 60 °C

Relative humidity

5 % to 90 %,  

non-condensing

Power supply

Plug-in mains adapter including 

cable with micro USB-B connector

230 V AC to 5 V DC,

 

max. 500 mA

Communication

Communication frequency

868.3 MHz, Rx class 2, 

minimum output power 0 dBm

Ethernet

10/100 Mbit

Connections

Ethernet

RJ45 jack

5 V DC power supply

Micro USB-B jack, max. 

current consumption 200 mA

1.6  Environmentally-friendly disposal

The components of the M-WRG-GW gateway 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. 

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