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Part no. 5256-01 Week 45/2022 EN
Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
info@meltem.com · www.meltem.com
HOME VENTILATION WITH HEAT RECOVERY
Ventilation unit
M-WRG-S M
M-WRG-S M-F
M-WRG-S M-FC
Modbus RTU
V E N T I L A T I O N & H E A T R E C O V E R Y
Master
V E N T I L AT I O N T H E R I G H T WAY
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Summary of Contents for Meltem M-WRG-S M
- Page 1 Modbus RTU Master Part no. 5256-01 Week 45/2022 EN Meltem Wärmerückgewinnung GmbH & Co. KG V E N T I L AT I O N T H E R I G H T WAY Am Hartholz 4 · D-82239 Alling...
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Page 2: Table Of Contents
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Contents Introduction ........................5 Notes on these operating and installation instructions ........... 5 Description ........................ - Page 3 Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Rules for correct usage ....................18 General .........................
- Page 4 Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Cleaning and maintenance ..................31 Troubleshooting ......................32 Connecting the ventilation unit to the Modbus RTU ..........
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Page 5: Introduction
Notes on these operating and installation instructions These original operating and installation instructions contain important information that should be followed when setting up and using the M-WRG-S M (-F, -FC) ventilation unit. ► Read all the instructions carefully before starting up the ventilation unit to avoid possible risks and mistakes. -
Page 6: Optional Accessories
KNX or Loxone. The M-WRG-S M-F ventilation unit has various ventilation levels/programs, including a humidity control. The M-WRG-S M-FC unit has an automatic mode (humidity and CO control) in addition to the ventilation levels. The CO value is the most important measure- ment for assessing the air quality. -
Page 7: Eu Declaration Of Conformity
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y EU declaration of conformity The M-WRG-S... ventilation units manufactured by Meltem Wärmerückgewinnung GmbH &... -
Page 8: Technical Data
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Technical data 1.7.1 Electrical connection Operating voltage... -
Page 9: Unit Properties
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 1.7.5 Unit properties Type of system... -
Page 10: Air Filters
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 1.7.7 Air filters Designation Filter class Standard filter (for outdoor air and extract air) -
Page 11: Safety Instructions
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Safety instructions These instructions contain notes that you must follow for your own personal safety and to avoid injury and damage to property. -
Page 12: Installation In Wet Areas
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 2.2.3 Installation in wet areas The following rules from DIN VDE 0100-701/702 (IEC 60364-7-701) apply to installation of M-WRG ventilation units in wet areas: —... -
Page 13: Note On Use In Conjunction With Room Air Conditioners
— The ventilation unit’s functions may be impaired or the unit may be damaged in rooms with a lot of dust (e.g. model-making) or corrosive gas emissions (e.g. blueprint shop, cleaning). — For any use contrary to the intended use, Meltem Wärmerückgewinnung GmbH & Co. KG shall accept no liability for any damage that may occur and offers no warranty that the ventilation unit will work perfectly and correctly. -
Page 14: Warranty And Liability
— The ventilation unit was not installed as described in the installation manual. — The ventilation unit was flush-mounted without using a flush-mount installation kit. — Genuine parts/genuine air filters were not replaced with genuine parts. — Unapproved changes were made to the installation kit or ventilation unit. — Repairs were not carried out by Meltem or by an authorised specialist company. — The ventilation unit was operated without air filters and outer wall terminals. — The warranty does not cover wearing parts such as air filters. Liability The manufacturer’s liability shall not apply in the following cases:... -
Page 15: Dimensions
V E N T I L A T I O N & H E A T R E C O V E R Y Dimensions Fig. 4: Dimensions of the ventilation unit M-WRG-S M (-F, -FC) in millimetres Meltem Wärmerückgewinnung GmbH & Co. KG V E N T I L AT I O N T H E R I G H T WAY Am Hartholz 4 ·... -
Page 16: Structure And Function
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Structure and function Overview of the modules 5.1.1... -
Page 17: Description Of The Functions
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Description of the functions 5.2.1 How the M-WRG ventilation unit works Fig. -
Page 18: How The Cross-Flow Plate Heat Exchanger Works
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 5.2.2 How the cross-flow plate heat exchanger works The warm extract air (item 5 in Fig. 9) drawn in from the interior is routed through the chambers of the cross-flow plate heat exchanger (item 1 in Fig. 9) and heats them. -
Page 19: Operation At Cold Times Of Year
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Operation at cold times of year ►... -
Page 20: Air Filters
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Air filters — Never run the ventilation unit without air filters. — Always use genuine Meltem filters. These are precisely matched to your M-WRG ventilation units, ensure minimal pressure losses and will ensure a long service life from your ventilation units. -
Page 21: Central And Local Operation Of The Ventilation Unit
Central and local operation of the ventilation unit Operation via the Modbus RTU master The M-WRG-S M ventilation unit is controlled centrally via Modbus (Modbus RTU master using the Modbus RTU protocol). The way it is operated via a Modbus RTU master will vary according to the system in use, and the master is to be supplied by the customer. -
Page 22: Starting Up
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Starting up Checking the ventilation unit before switching on for the first time ► Check the ventilation unit for damage. -
Page 23: Operating The Ventilation Unit
Modbus RTU master. This solution allows you to control the M-WRG units individually, room-by-room, floor-by-floor or all together. They can also be demand-controlled via humidity or CO sensors. Units with the appropriate sensors are needed to record the measured values (type: M-WRG-S M-F or M-WRG-S M-FC). Local operation The step switch (item 2 in Fig. 10 on page 21) is used to set four different ventilation levels/programs; the maximum ventilation level is activated using a switching sequence and is time-limited. -
Page 24: Ventilation Levels/Programs
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Ventilation levels/programs There are different ventilation programs/levels available for selection, depending on the type of ventilation unit. These can be activated using the step switch on the ventilation unit (see section 7.2 on page 21) or via the Modbus configuration (see section 16.7 on... -
Page 25: Options For Ventilation Mode
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y range from 15 - 60 m /h fully automatically. -
Page 26: Minimum Ventilation To Din 18017-3, M-Wrg-O/Mvs, Part No. 5046-11
This option changes the level assignment on the control units for the ventilation unit: switch position I, II, III: 20, 40, 60 m NOTICE — This option can only be selected in conjunction with M-WRG-S M-F and M-WRG-S M-FC units with humidity and/or CO control. -
Page 27: Filter Maintenance
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Filter maintenance The ventilation unit has a runtime-controlled filter monitoring function with audible indi- cator. It monitors the time since the last air filter change. If the last air filter change was more than one year ago, the filter change indicator is activated and a pending air filter change is signalled. -
Page 28: Changing The Air Filters
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 12.3 Changing the air filters NOTICE ► Always switch the ventilation unit off at the mains switch (item 1 in Fig. 10 on page 21) for the filter change. On ventilation units with the M-WRG-O/NOF option, power to the unit must be switched off using the building’s miniature circuit breaker. -
Page 29: Insert New Air Filters
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y ► Clean the filter ring and filter cover with a damp cloth if they are dirty (see chapter 13 on page 31). ► Dispose of the used air filters in the non-recyclable waste or as required by your coun- try’s disposal regulations. -
Page 30: Attaching The Unit Cover To The Ventilation Unit And Switching On The Ventilation Unit
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 12.3.4 Attaching the unit cover to the ventilation unit and switching on the ventilation unit ►... -
Page 31: Cleaning And Maintenance
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Cleaning and maintenance WARNING ► Switch off the power to the ventilation unit before cleaning. -
Page 32: Troubleshooting
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Troubleshooting Error Cause Remedy Ventilation unit is not... -
Page 33: Connecting The Ventilation Unit To The Modbus Rtu
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Connecting the ventilation unit to the Modbus RTU This section describes how to connect the ventilation units electrically to the Modbus and the settings and registers for the Modbus protocol. -
Page 34: Bus Cable
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 15.1.2 Bus cable The bus cable is connected at the connection on the Modbus master and on the 10-pole terminal block (see item 1 in Fig. 18 on page 33) on the board of the first ventila-... -
Page 35: Accessing The Modbus Board In The Ventilation Unit
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 15.3 Accessing the Modbus board in the ventilation unit 15.3.1 Switching off power to the ventilation unit... -
Page 36: Removing The Network Connection Cover
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 15.3.3 Removing the network connection cover ►... -
Page 37: Example Of Floor-By-Floor Wiring
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 15.4.2 Example of floor-by-floor wiring 230 V AC 230 V AC... -
Page 38: Electrical Installation
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 15.5 Electrical installation NOTICE — The ventilation unit may be damaged if the bus cable is connected incorrectly. This will also invalidate the warranty. -
Page 39: Modbus Configuration
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y Modbus configuration 16.1 Default settings — Start bits: 8 —... -
Page 40: Registers
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 16.5 Registers Register Read/ Function/name Data type... -
Page 41: Sensors In The Different Ventilation Unit Types
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 16.6 Sensors in the different ventilation unit types Ventilation unit type Sensor type... -
Page 42: Unbalanced
Operating and installation instructions M-WRG-S M (-F, -FC) ventilation unit V E N T I L A T I O N & H E A T R E C O V E R Y 16.7.2 Unbalanced NOTICE — Registers 41120, 41121, 41122 and 41132 must be written in succession. -
Page 43: Integrating Into Other Bus Systems
For integration into other bus systems, the system concerned must have a Modbus RTU interface. The customer will need to clarify with the system manufacturer whether Modbus ventilation units from Meltem will work in their system. Meltem Wärmerückgewinnung GmbH & Co. KG V E N T I L AT I O N T H E R I G H T WAY Am Hartholz 4 ·... - Page 44 We have checked the content of this publication for conformity with the product described in it. There may nevertheless still be differences, so we cannot guarantee complete accuracy. The information in this publication is regularly checked and any necessary corrections are made in subsequent editions. Copyright © Meltem Wärmerückgewinnung GmbH & Co. KG We reserve the right to make changes. Meltem Wärmerückgewinnung GmbH & Co. KG...
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