Rehau NEA SMART 2.0 User manual

NEA SMART 2.0 SERVICE MANUAL
Manual for Designer, Installer and Service Partner

This service manual “NEA SMART 2.0” is valid
from October 2019.
The actual Technical Information is available for
download under www.rehau.com/TI.
This document is protected by copyright. The rights
conferred therein are reserved, in particular those
relating to the translation, reprinting, extraction of
pictures, electronic transmissions, reproduction by
photo-mechanical or similar means and storage on
data processing equipment.
All dimensions and weights are approximate.
Subject to errors and modifications.
2

MANUAL
1 Security 8
2 Introduction 9
3 System overview 10
4 Function 18
5 Component selection 38
6 Installation 48
7 System set up 49
8 Operating of NEA SMART 2.0 SYSTEM 72
9 Parameter 93
10 Data 102
11 Scheme 112
12 Data sheets 122
3

CONTENTS
1 Security 8
2 Introduction 9
2.1 Range of application 9
2.2 Functions and control of the system 9
3 System overview 10
3.1 Range of Application 10
3.2 Sytem overview 11
3.3 Components of the system 12
3.4 Functions and Features 15
3.4.1 Room temperature control (surface heating/cooling) 15
3.4.2 Room temperature control optimisation functions 15
3.4.3 Hybrid technology (bus/wireless), pairing of room units 15
3.4.4 Integrated WLAN/LAN, operation via browser or app 15
3.4.5 Smart functions 16
3.4.6 Flow temperature control 16
3.4.7 Dehumidification 16
3.4.8 Over the air update (OTA) 16
3.5 System set-up 16
3.5.1 General procedure 16
3.5.2 Assignment of room units (pairing) 16
3.5.3 Set up and operate using integrated web pages 16
3.6 Operation, monitoring and maintenance on user App 17
3.7 System limits 17
4 Function 18
4.1 Operating modes 18
4.1.1 Heating / Cooling (automatic mode) 18
4.1.2 Only Heating / only Cooling 19
4.1.3 Heating / cooling manual 19
4.1.4 Energy levels 19
4.1.5 Selection of energy levels 19
4.1.6 Rules for overriding individual energy levels by global
setting 20
4.1.7 Temporary room temperature set point change
(timed mode) 20
4.1.8 Permanent room temperature set point change 20
4.2 Heating and cooling systems 21
4.2.1 Available systems 21
4.2.2 Combination of systems 21
4.2.3 Supply of systems 21
4.3 Heating mode 21
4.3.1 Start and stop of heating mode 21
4.3.2 Influence of pilot rooms 23
4.3.3 Boost function 23
4.4 Cooling mode 24
4.4.1 Cooling criterion 24
4.4.2 Flow temperature set point in cooling mode 25
4.4.3 Dew point monitor 25
4.4.4 Dehumidifiers 25
4.4.5 Summer compensation 26
4.5 Supply control of heat and cool media 26
4.5.1 Manifold selection 26
4.5.2 Pump control 26
4.5.3 Mixed circuits 27
4.5.4 Boiler and chiller control 27
4.6 Room temperature control 27
4.6.1 Adaption to used system 27
4.6.2 Controller type: Proportional – Integral (PI) 28
4.6.3 Valve control by PWM method 28
4.6.4 Overview to room individual settings 29
4.6.5 Timer programs 29
4.6.6 Auto start function 29
4.6.7 Pilot rooms 30
4.6.8 Parameter “economy” 30
4.6.9 User settings and operating 30
4.6.10 Remote temperature probe for room units 31
4.6.11 Rooms with various heating / cooling systems 31
4.6.12 Geofencing 31
4.7 Digital input and output signals 32
4.7.1 Digital input signal 32
4.7.2 Digital output signal 33
4.8 System operating and monitoring 34
4.8.1 Using the room units 34
4.8.2 Integrated web pages 34
4.8.3 Installer only web pages – Commissioning wizard for
global system set-up 34
4.8.4 Installer only web pages – Room setup and
parametrization 35
4.8.5 User Web pages 35
4.8.6 NEA SMART 2.0 App 35
4.8.7 Warnings and alarm functions 35
4.9 System response in case of fault 36
4.9.1 Communication problems 36
4.9.2 Probe faults 36
4.9.3 Control issues 36
4.9.4 Other issues 36
5 Component selection 38
5.1 Starting Point 38
5.2 Minimum and maximum configurations 38
5.3 Selection Process 39
5.3.4.1 Hydraulic Manifolds 39
5.3.1 Mixed circuits 39
5.3.2 Dehumidifiers 39
4

5.3.3 Analog Input 39
5.3.4 Digital Inputs 40
5.3.5 Digital Outputs 41
5.4 Internet Connection 42
5.5 Wiring 43
5.6 Application Examples 44
5.6.1 Heating system with mix of wireless and wired Room
units (up to eight rooms) 44
5.6.2 Heating and Cooling system with mix of wireless and
wired Room units and R-Module (up to twelve rooms) 45
5.6.3 Heating and Cooling system with mix of wireless and
wired Room units and slaves (up to twenty four rooms) 46
5.6.4 Heating and Cooling system with mix of wireless and
wired Room units and U-Module (for mixed circuit) 47
6 Installation 48
6.1 Leaflets 48
7 System set up 49
7.1 General remarks to set up procedure 49
7.1.1 Preparation 49
7.1.2 Dierent complexity of systems (class A, B, C) 49
7.1.3 Flow chart of set up procedure 49
7.2 Set system bus addresses 50
7.3 Switch on power supply 50
7.3.1 Check POWER / FUSE LED’s 51
7.3.2 Check zone bus LED’s 51
7.3.3 Check manifold actuators 51
7.4 Pairing 52
7.4.1 General notes 52
7.4.2 Start pairing procedure on Base 52
7.4.3 Pairing of NEA SMART 2.0 Room units 53
7.4.4 Pairing of NEA SMART 2.0 Room probes 54
7.4.5 Pairing of NEA SMART 2.0 outdoor sensor 54
7.4.6 Further settings on NEA SMART 2.0 Room units 54
7.5 Configuration Wizard 56
7.5.1 Introduction 56
7.5.2 Preparation 56
7.5.3 Example for configuration 57
7.5.4 General settings 58
7.5.5 Choose system type 58
7.5.6 Enter system components and functions 59
7.5.7 Scan system bus components 60
7.5.8 Define function of system bus components 60
7.5.9 Input / output assignment of U-Modules for mixed circuit 61
7.5.10 Definition of mixed circuit operating 62
7.5.11 Links between mixed circuits and manifolds 62
7.5.12 Input / output assignment of U-Modules for dehumidifiers 62
7.5.13 Overview of Base units 63
7.5.14 Definition of room operating modes 63
7.5.15 Definition of outputs of the Base 65
7.5.16 Definition of inputs of the Base 65
7.5.17 End of wizard, enable or disable automatic mode 66
7.6 Installer main menu 66
7.6.1 Timer programs 67
7.6.2 Room set up 68
7.6.3 System data 70
7.6.4 Diagnosis / probe calibration 70
7.6.5 Settings (Parameters) 70
7.7 Reset functions 71
7.7.1 Delete pairing of all channels (RZs) on one room unit 71
7.7.2 Delete pairing of outside temperature probe 71
7.7.3 Reset Controller to initial state 71
7.7.4 Reset Room Unit 71
7.7.5 Reset WIFI Key to default setting 71
8 Operating of NEA SMART 2.0 SYSTEM 72
8.1 Operating by NEA SMART 2.0 Room units 73
8.1.1 Display information 73
8.1.2 Order of the displayed information 75
8.1.3 Setting the Setpoint of room temperature 75
8.1.4 Operating status 76
8.2 Operating by web pages 76
8.2.1 Connect a device 76
8.2.2 User area 76
8.2.3 Installer area 80
8.3 Operating by REHAU SMART 2.0 App 85
8.3.1 Installation of the App 85
8.3.2 Setting up the App 85
8.3.3 Getting to know the App 86
8.3.4 First steps in the App 89
8.3.5 Smart function Geofencing 90
8.3.6 Account Management 90
8.4 FAQ’s and troubleshooting 91
8.4.1 Problems and potential causes 91
8.4.2 Error-codes on NEA SMART 2.0 Room Units 91
8.4.3 Change batteries of Room Units and Probes 92
9 Parameter 93
9.1 Heating general 93
9.1.1 Heating circuits 94
9.1.2 Heating circuits, boost function 95
9.2 Heating circuits, boost function 96
9.2.1 Cooling circuits 97
9.3 Mixing circuit control 97
9.4 Room temperature control 98
9.5 Device control 99
9.5.1 Heater control 99
9.5.2 Chiller control 99
9.5.3 Dehumidifier control 100
9.5.4 Pump control 101
9.5.5 Valve control 101
10 Data 102
10.1 Electrical termination 102
10.2 Factory settings 102
10.2.1 Basis 102
10.2.2 R-Modul 103
10.2.3 U-Module (Defined as Mixed circuit) 103
10.2.4 U-Module (Defined as Dehumidifier) 104
5

10.3 Allocation of the clamps 105
10.3.1 NEA SMART 2.0 Base 24 V 105
10.3.2 NEA SMART 2.0 Base 230 V 106
10.3.3 NEA SMART 2.0 R-Module 230 V 107
10.3.4 NEA SMART 2.0 R-Module 24 V 108
10.3.5 NEA SMART 2.0 U-Module 24 V 109
10.3.6 NEA SMART 2.0 U-Module 24 V – Mixed Circuit 110
10.3.7 NEA SMART 2.0 U-Module 24 V - Dehumidifier 111
11 Scheme 112
11.1 Overview 112
11.1.1 Simple Room Temperature Control 113
11.1.2 Enlarged Room Temperature Control 114
11.1.3 Enlarged Room Temperature Control with chilled ceiling 115
11.1.4 Simple Room Temperature Control with mixed circuit 116
11.1.5 Simple Room Temperature Control with mixed circuit
and two dehumidifiers 117
11.1.6 Simple Room Temperature Control with mixed circuit 118
11.1.7 Room Temperature Control with chilled ceiling, mixed
circuit and two dehumidifiers 119
11.1.8 Simple Room Temperature Control with chilled ceiling,
mixed circuit and dehumidifiers 120
11.1.9 Large Room Temperature Control 121
12 Data sheets 122
12.1 NEA SMART 2.0 Room unit TBW 122
12.2 NEA SMART 2.0 Room unit TRW 123
12.3 NEA SMART 2.0 Room unit HBW 124
12.4 NEA SMART 2.0 Room unit HRW 125
12.5 NEA SMART 2.0 Room unit HBB 126
12.6 NEA SMART 2.0 Room unit HRB 127
12.7 NEA SMART 2.0 Room probe TBW 128
12.8 NEA SMART 2.0 Room probe HBW 129
12.9 NEA SMART 2.0 Room probe TRW 130
12.10 NEA SMART 2.0 Room probe HRW 131
12.11 NEA SMART 2.0 Base 24 V 132
12.12 NEA SMART 2.0 Base 230 V 133
12.13 NEA SMART 2.0 R-Module 24 V 134
12.14 NEA SMART 2.0 R-Module 230 V 135
12.15 NEA SMART 2.0 U-Module 24 V 136
12.16 NEA SMART 2.0 Transformer 137
12.17 NEA SMART 2.0 Remote sensor 138
12.18 NEA SMART 2.0 VL/RL sensor 140
12.19 NEA SMART 2.0 Outdoor sensor 142
12.20 NEA SMART 2.0 Antenna 143
6

7

1 SECURITY
Safety warnings and operating instructions
- For your own safety and the safety of other people, please read
through all safety instructions and operating instructions carefully
and completely before commencing assembly.
- Keep the operating instructions safe and have them available
- If you have not understood the safety instructions or any individua-
linstallation instructions or find them unclear, please contact your
REHAU sales oce.
- Non-compliance with the safety information may lead to damage to
property and personal injury.
Use in line with the specification
The NEA SMART 2.0 control system must be configured, installed and
operated only as described in this technical information and in the
other installation manuals for the system. Any other use is not in
accordance with the specification and is therefore not permitted.
Observe all national and international routing, installation, accident
prevention and safety regulations and the instructions in this technical
information when installing piping systems and electrical components
and equipment.
Areas of application which are not covered by this technical informati-
on (special applications) must be discussed with our application
department.
Contact your REHAU sales oce.
Prerequisites for personnel:
- Our systems must only be installed by authorised and
trained personnel.
- Only trained and authorised personnel may work on electrical
installations or pipework components.
General precautions
- Keep your workplace clean and free of obstructions.
- Ensure that your work space has adequate lighting.
- Keep children, pets and unauthorised persons away from tools and
installation areas. This particularly applies to renovations in occupied
areas.
Pictograms and logos
Danger to life due to high voltage. Safety instructions are
marked with this symbol.
Safety information
Legal information
Important information which must be observed
Configurable parameter
8

2 INTRODUCTION
Congratulations on your purchase of the REHAU NEA SMART 2.0
control system. We are pleased that you have chosen a control system
from REHAU. We hope you enjoy using your product.
2.1 Range of application
NEA SMART 2.0 is a modern and eective control system with a
variety of functions for underfloor heating and cooling systems.
Important features are:
- Clear and high quality design of the room units
- Fully and automatic control of the complete installation
- Standard with LAN/WLAN interface
- For operation via web browser or App
- Smart functions that ensure a high level of comfort and ensure
eective operation
- Suitable for new installations and retrofitting
2.2 Functions and control of the system
What can the NEA SMART 2.0 system?
The basic function of the system is to heat the rooms comfortably and
economically according to your wishes.
Depending on the installed system many other functions are possible:
- Room cooling via the combined heating/cooling surfaces
- Automatic or manual change between heating, neutral and cooling
- Control of the optimum temperature for the supply of heating/cooling
surfaces („flow temperature control“)
- Dehumidification of the rooms
Via timing programs and functions of the App, the set points of the
room temperature - for heating and cooling - can be switched
between comfort temperature (Normal mode) and Eco temperature
(Reduced mode).
How to operate the system?
- You can operate the system:
Directly via the NEA SMART 2.0 Room units (setting the required
temperature, changing the operating mode)
- as well as either
Locally via the browser of your smartphone, tablet or PC (only inside
the house, use of the integrated web pages)
- or
Via Cloud of the NEA SMART 2.0 App - wherever you are
The NEA SMART 2.0 App is not only easy and user-friendly to use, it
also oers many features that make the system a really smart system.
What can you adjust or look at?
Depending on installed options of the system, there are a variety of
ways to set room temperatures, on-site or on-the-go, adapt the
system to your needs, view statistics, or get hints and informations.
The table 2-1 gives an overview of the dierent possibilities.
It should be noted that during operating via the app (cloud connecti-
on), it does not matter where you are, while the operation via the
integrated web pages only works within your home.
What can I do? Room unit Web pages (local) App (via cloud)
Read room temperature, read and adjust required temperature P P P
Select operating mode „timing program“, „normal“ or „reduced“ P P P
Adjust timing program and assign to the room P P
Assign room name P P
Adjust required temperatures for the rooms according timing program P P
Select heating mode or cooling mode P P
Use holiday mode P P
Automatic reduction of energy consumption during absence (geofencing) P
See temperature statstics of the room P
At dehumidifier control:
Change the switch-on values of the dehumidifer control P
Reduce automatically energy consumption during absence P
Receive optimization information of the system P
Receive maintenance instructions P
Tab. 2-1 Possible adjustments on dierent devices
9

3 SYSTEM OVERVIEW
3.1 Range of Application
The NEA SMART 2.0 control system is a modular solution for radiant
heating and cooling systems which can be configured for multiple
systems.
The clear, high-grade room unit design discreetly blends into living
spaces and oces. Due to its modular design, the system is suitable
for individual room temperature control, as well as complex solutions
for up to 60 rooms, including flow temperature control and integration
of dehumidifier units. The modular design of the system is achieved by
incorporating additional NEA SMART 2.0 Bases, NEA SMART 2.0
R-Module and NEA SMART 2.0 U-Module.
The system can be conveniently operated using a smartphone, tablet
or PC at home or when the user is away from home via a LAN/WLAN
integrated into the central control units as standard. Connecting the
system to the cloud allows the user to enjoy optimisation, analysis and
remote maintenance functions.
The room units are available as a wireless or wired
option (based on bus technology). Hybrid technology
in the central control unit allows both options to be connected
to the base station with no need for additional components,
ensuring both options can be mixed as required.
Since the wired technology used for the room units does not
have any special requirements for the type and topology of the
installed lines, the wired solution can normally also be installed
as a retrofit alongside the wireless technology, which can
always be used.
- Base for 8 rooms
- Hybrid technology: suitable for
Bus- and Wireless room units
- LAN/WLAN as standard
- High quality design
- LED matrix display
- Bus and wireless variant
- Configuration via smartphone/tablet
- operation worldwide
- Remote maintenance and
monitoring
APP
NEA SMART 2.0 ROOM UNITNEA SMART 2.0 BASE
Fig. 3-1 System NEA SMART 2.0
10

3.2 Sytem overview
Fig. 3-2 System overview NEA SMART 2.0 for 24 V
SYSBUS System Bus (4-wire Bus, shielded
cable)
2: NEA SMART 2.0 Base 24 V, central control
unit (Master) with transformer, for up to
8 rooms
5: NEA SMART 2.0 U-Module 24 V, extensi-
on module universal for mixed circuits, dehu-
midifier (with transformer to supply the mi-
xing motor)
ZOBUS Zone Bus (ZOBUS, 2-wire Bus, cable
typ and topology largely free, polarity does not
have to be considered)
3: NEA SMART 2.0 R-Module 24 V, extension
module room for 4 more rooms (with transfor-
mer to supply the actuators)
6: LAN-/WLAN-interface to connect the sys-
tem to the router and cloud
1: NEA SMART 2.0 Room unit with display
(Bus and Wireless)
4: NEA SMART 2.0 Base 24 V, central cont-
rol unit (Slave) with transformer, for aditional
8 rooms
7: Actuator 24 V to control the valves of the
manifold
8: Router
Tab. 3-1 System overview NEA SMART 2.0 – Details
11

3.3 Components of the system
NEA SMART 2.0 Room unit
Fig. 3-3 NEA SMART 2.0 Room unit
Room units with LED matrix display, for mounting on a flush mounting
box or directly onto the wall.
- Operation with a central button and capacitive plus/minus buttons
as well as with an app
- Remote sensor connectable for floor temperature monitoring or
room temperature control
- Illuminated frame to emit display and provide backlighting for bus
variant; chrome-coloured ring for wireless variant
- Flat housing, for mounting directly on the wall or on a flush mounting
box
Variants:
- Bus or wireless technology
- With temperature or temperature/humidity sensor
- Housing color: white or black
NEA SMART 2.0 Room probe
Fig. 3-4 NEA SMART 2.0 Room probe
Room probe for mounting on a flush mounting box or directly onto the
wall.
- Remote sensor connectable for floor temperature monitoring or
room temperature control
- Flat housing, for mounting directly on the wall or on a flush mounting
box
Variants:
- Bus or wireless technology
- With temperature or temperature/humidity sensor
- Housing color: white
NEA SMART 2.0 Base 24 V
Fig. 3-5 NEA SMART 2.0 Base 24 V
Central control unit for surface heating and cooling systems for
installation in the manifold cabinet.
- Hybrid technology for connecting a maximum of 8 NEA SMART 2.0
Room units in bus or wireless technology
- Extension of 4 rooms with NEA SMART 2.0 R-Module
- System extension with up to 4 additional NEA SMART 2.0 Bases
possible. Up to 60 rooms can be controlled.
- Activation of 12 thermal actuators UNI 24 V possible
- LAN/WLAN interface for integrating the system into the home
network
- 4 relay outputs to actuate a pump, a hot or cold generator, a
dehumidifier or other external units
- 4 digital inputs for connecting dew point sensors or for switching the
operating mode
- Integrated status LEDs
- Screw less connection technology with clamped connectors
- Wall and DIN rail mounting
- Operating voltage via NEA SMART 2.0 Transformer
12

NEA SMART 2.0 Base 230 V
Fig. 3-6 NEA SMART 2.0 Base 230 V
Central control unit for surface heating and cooling systems for
Installation in the manifold cabinet.
- Hybrid technology for connecting a maximum of 8 NEA SMART 2.0
Room units in bus or wireless technology
- Extension of 4 rooms with NEA SMART 2.0 R-Module
- System extension with up to 4 additional NEA SMART 2.0 Bases
possible. Up to 60 rooms can be controlled.
- Control of 12 thermal actuators UNI 230 V possible
- LAN/WLAN interface for integrating the system in the home network
- 4 relay outputs to actuate a pump,a hot or cold generator, a
dehumidifier or other external units
- 4 digital inputs for connecting dew point msensors or for switching
the operating mode
- Integrated status LEDs
- Screw less connection technology with clamped connectors
- Wall and DIN rail mounting NEA SMART 2.0 U-Modul 24 V
NEA SMART 2.0 U-Module 24 V
Fig. 3-7 NEA SMART 2.0 U-Module 24 V
Extension module universal for NEA SMART 2.0 Base 24 V, configu-
rable for:
- Flow temperature control
- Actuation of up to 2 dehumidifiers
- Connection to NEA SMART 2.0 Base 24 V via 4-wire system bus
- 4 analog inputs
- 4 relay outputs
- 4 digital inputs
- Integrated status LEDs
- Wall and DIN rail mounting
NEA SMART 2.0 R-Module 24 V
Fig. 3-8 NEA SMART 2.0 R-Module 24 V
Extension module for NEA SMART 2.0 Base 24 V to control
4 additional rooms.
- Connection to NEA SMART 2.0 Base 24 V via 2-wire Zone bus
(ZOBUS), polarity reversal protected
- 8 thermal actuators UNI 24 V connectable
- 2 relay outputs to actuate a pump, a hot or cold generator, a
dehumidifier or other external units
- 1 digital input for connecting dew point sensors or for switching the
operating mode
- Integrated status LEDs
- Wall and DIN rail mounting
NEA SMART 2.0 R-Module 230 V
Fig. 3-9 NEA SMART 2.0 R-Module 230 V
Extension module for NEA SMART 2.0 Base 230 V to control 4
additional rooms.
- Connection to NEA SMART 2.0 Base 230 V via 2-wire Zone bus
(ZOBUS), polarity reversal protected
- 8 thermal actuators UNI 230 V connectable
- 2 relay outputs to actuate a pump, a hot or cold generator, a
dehumidifier or other external units
- 2 digital inputs for connecting dew point sensors or for switching the
operating mode
- Integrated status LEDs
- Wall and DIN rail mounting
13

NEA SMART 2.0 Transformer
Fig. 3-10 NEA SMART 2.0 Transformer
24 V transformer to supply the NEA SMART Base 24 V. For wall and
DIN rail mounting.
NEA SMART 2.0 Outdoor sensor
Abb. 3-11 NEA SMART 2.0 Outdoor sensor
Wireless outdoor sensor, assignable to NEA SMART 2.0 Base. For
wall mounting.
NEA SMART 2.0 Remote sensor
Fig. 3-12 NEA SMART 2.0 Remote sensor
Temperature sensor connectable to NEA SMART 2.0 Room unit.
Configurable for:
- Floor temperature monitoring in heating/cooling mode
- Measuring of the room temperature
NEA SMART 2.0 VL/RL sensor
Abb. 3-13 NEA SMART 2.0 VL/RL sensor
Temperature sensor connectable to NEA SMART 2.0 R-Module to
measure the supply and return temperature of a mixed circuit.
NEA SMART 2.0 Antenna
Abb. 3-14 NEA SMART 2.0 Antenna
Antenna for optional connection to NEA SMART 2.0 Base to increase
the range of the radio signal to the NEA SMART 2.0 Room units.
- Mounting the antenna outside the manifold cabinet.
Thermal actuator UNI 230 V / 24 V
Fig. 3-15 Thermal actuator UNI 230 V / 24 V
Thermal actuator to activate the valves in a manifold.
- Normally closed
- Energy ecient, only 1 W power consumption
- Clear status display
- Can be installed in any position
14

- “First-open function” for operating in the construction phase (before
installation of controllers)
- Can be adjusted for dierent types of valves and manifolds
- Protection rating IP54
Thermal actuator MINI 24 V
Fig. 3-16 Thermal actuator MINI 24 V
Thermal actuator to activate the valves in a manifold.
- Compact design
- Ideal for mounting with valve distances < 45 mm
- easy plug mounting
- Energy ecient, only 1 W power consumption
- with valve adapter VA 80 S
- silent and maintenance-free
3.4 Functions and Features
3.4.1 Room temperature control (surface heating/cooling)
Room temperatures are controlled by the valves in the manifold being
opened at specified times, respective of the temperature recorded by
the room units and the target temperature (pulsewidth modulation
process – PWM).
A suitable set of parameters is selected for the chosen heating/cooling
system, such as underfloor heating, ceiling heating or cooling
systems.
It is possible to use dierent heating/cooling systems in one room at
the same time without using auxiliary components, such as relay
circuits or gate valves upstream of the manifolds.
3.4.2 Room temperature control optimisation functions
The NEA SMART 2.0 control system permanently
analyses the temperature sequences in individual rooms
and then optimises the control mode. Such optimisation
provides maximum comfort while ensuring ideal energy
eciency:
- Compensation can aid comfort controls
- Detection of temperature drop in heating mode, e.g. due to
open window
- Extremely precise compliance with the target values thanks to
automatic adaptation of control parameters
- Auto boost function to ensure prompt return from reduced mode
3.4.3 Hybrid technology (bus/wireless), pairing of room units
The NEA SMART 2.0 Base oers the option of communicating with
wired (bus technology) room units and wireless room units as standard.
Room units can be easily and reliably registered on the individual base
channels (pairing). The process is identical for both technologies.
3.4.4 Integrated WLAN/LAN, operation via browser or app
The NEA SMART 2.0 Base has WLAN/LAN as well as a web server
standard „on board“. Systems used purely to control temperature
(with a base) can be set up and operated using a standard web
browser.
There is a user app available to end users featuring a series of
easy-to-use functions to operate the system inside the house and
while away from home. This app also oers analysis and maintenance
information in a separate section for installer.
15

3.4.5 Smart functions
A series of smart functions are provided by the algorithms in the room
units and bases and the option to evaluate temperature sequences
and control mode in the cloud:
- Adjusting room temperatures using Amazon Alexa
- Automatic detection of the users’ presence or absence with
geofencing
- Detection of temperature drop in heating mode, e.g. due to openn
window
- Energy-saving mode is triggered when users are absent temporarily
or for a longer period
- Room temperature analysis, automatic triggering of measures to
improve control mode
- Information on improving energy eciency
These smart functions are extended and improved on an ongoing
basis.
3.4.6 Flow temperature control
The control of the flow temperature of the heating and cooling
surfaces can be done via the NEA SMART 2.0 U-Module. Up to three
mixed circuits may be installed in a single system.The flow tempera-
ture control is parametrised using pre-defined parameter sets, which
are automatically selected based on the defined system, such as an
underfloor heating or ceiling cooling system.
The flow temperatures are managed according to need. In addition to
the characteristic values of outside temperature, energy requirements
are also a factor in flow temperature management and are determined
by the operating mode – normal, reduced or absence mode.
The room air humidity levels detected by the room units and the dew
point calculated based on these levels play a decisive role in cooling
applications.
3.4.7 Dehumidification
Dehumidifier units can be assigned to the individual areas in the
installation, where each area can contain several rooms. The NEA
SMART 2.0 components activate these units when relative humidity or
dew point thresholds are reached.
Up to 9 dehumidifiers can be integrated into the system.
3.4.8 Over the air update (OTA)
Systems which are connected to the cloud via the Internet receive the
latest version of the software without requiring intervention from the
user.
3.5 System set-up
The system is conveniently put into operation using a smartphone,
tablet or PC. To do so, a direct wireless LAN (access point mode)
connection is established between the NEA SMART 2.0 Base and the
device used to set up operation.
No router or connection to the internet is needed.
3.5.1 General procedure
The system set-up is generally divided into the following steps:
1. Installing the components, establishing all connections, testing
2. Assignment of room units to the base or base unit channels
(pairing)
3. Setting system-specific values: target values, time programs,
parameters
3.5.2 Assignment of room units (pairing)
The room units are assigned to one or more channels of the Base or
R-Module. Several channels may be required, because a channel’s
connection potential for actuators is exhausted or dierent systems,
such as underfloor heating or ceiling cooling, are present in a room.
Successful pairing is signalled on the room units and the base.
3.5.3 Set up and operate using integrated web pages
In systems comprising a NEA SMART 2.0 Base and, where required,
a R-Module (usual application for room temperature control only), the
system can be adapted to the system conditions and user preferen-
ces. The system can be operated using a web browser on a smart-
phone, tablet or laptop.
However, this option is only available locally when the
browser-capable unit is connected directly to the base.
In complex systems the following steps are performed:
- Input of building-specific data, such as the number of valves or
mixed circuits
- Determination of the system’s hydraulic structure (connection to the
valves in the mixed circuit)
- Detection of all R-Modules connected to the Bases (zone bus)
- Detection of all Bases (slave units) and U-Modules connected to the
system bus
- Displays for all Room units assigned to the Base control channels
- Assignment of the Base control channels to the heating/cooling
systems in the rooms
- Assignment of dehumidifiers to rooms and definition of electric
connections
- Testing of all connected devices
- Issuing or adjustment of room names, target values, time programes
- Parametrisation adjustment
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All installation data are stored on the Base and after
Internet connection into the cloud.
3.6 Operation, monitoring and maintenance on user App
The user app can only be used if the control system is connected to
the Internet via the router and is registered in the cloud. User App
communication takes place with the cloud only. It therefore does not
matter whether you use it inside or outside the building.
- The user app is the convenient tool for:
- Specification of room temperature setpoints
- Create and modify timing programs
- Activate short or long (holiday) absence periods
- Analysis of room temperatures
- The installer or the contracted maintenance firm can use the user
app’s expert section to:
- Check and change all settings
- Received system messages for maintenance requirements
- Analyze the behavior of the system
The maintenance and repair options make things easier, especially for
larger systems or systems which are further away.
The app can be downloaded in its latest version from the App store
(iOS) or Google Playstore (Android).
3.7 System limits
The maximum configuration of a NEA SMART 2.0 system consists of:
- 1 x NEA SMART 2.0 Base 24 V (master)
- 4 x NEA SMART 2.0 Base 24 V (slave)
- 5 x NEA SMART 2.0 R-Module (extension modules room, per base
one R-Module possible)
- 5 x NEA SMART 2.0 U-Module (extension modules universal)
In this expansion stage, the system includes a maximum of:
- 60 rooms
- 3 mixed circuits
- 9 dehumidifiers (5 dehumidifiers on the base units, 4 dehumidifiers
on the U-Modules or the R-Modules)
- The maximum number of 5 U-Modules can be used even if there is
one Base only.
The relay outputs of the NEA SMART 2.0 components
are pre-assigned specific functions to some extent.
This pre-assignment can be changed when configuring the
system.
This allows dehumidifiers to be activated via the NEA SMART
2.0 Base or the NEA SMART 2.0 R-Modules as well as the NEA
SMART 2.0 U-Module.
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4 FUNCTION
In the following chapters you will find the description of all general and
optional function of the system. The range of these functionalities
is determined by the installed components and the system settings
selected during commissioning or at a later stage.
The behaviour of the system is determined by the parameter settings.
All parameters can be modified by the installer or maintenance
company, a subset of the parameters also by the user of the system.
At the end of each chapter there is an information block
with the icon
which describes the path for web page or NEA SMART 2.0
App, starting from the main menu to the sub-menu containing
the relevant parameters for the specific function:
Examples:
Web page:
Home Installer Settings Heating / Cooling
App:
Settings Heating / Cooling
All parameters have a default setting (factory setting), and may be
changed only in a certain range.
A complete list of parameters you can find in chapter “9 PARAMETER”.
4.1 Operating modes
Introduction:
The term “operating mode” describes a combination of settings
selected via NEA SMART 2.0 App or web page.
The 1st setting determines the overall operating mode of the system:
Heating or cooling or automatic activation of heating / cooling.
The 2nd setting determines which energy level is selected and how
it is selected:
Temperature level permanently NORMAL or REDUCED or selected by
timing program, STANDBY, HOLIDAY or PARTY mode.
4.1.1 Heating / Cooling (automatic mode)
This mode is only possible in installations, where the system is
capable to control the complete installation and has information about
outside temperature (outside probe connected or weather information
from internet service). During the setup sequence the installer may
enable this option.
In this mode, the system changes automatically between the general
operating mode heating, cooling and inactive.
Activation of HEATING mode depends on
- heating limit applied on filtered outside temperature
- hysteresis for heating limit
- heating period definition
- room temperature in pilot rooms
- time since last active cooling mode
Activation of COOLING mode depends on
- cooling criterion, calculated out of: filtered outside temperature,
actual outside temperature, temperature conditions in pilot rooms
- cooling period definition
- time since last active heating mode
Both modes are subject to a minimum running time.
Activation of both modes is also influenced by
- the general energy level of the installation.
- external signals HEATING or COOLING coming from a super
ordinated system like a central heating/cooling source (e.g. a heat
pump), a BMS or from a simple switch which allows or blocks
heating or cooling mode.
See also table 4-1 for activation of operating modes..
Relevant parameters
Webseite:
Home Installer Settings Heating / Cooling Settings
App:
Settings Heating / Cooling
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4.1.2 Only Heating / only Cooling
These operating modes follow the same rules as in HEATING / COOLING
(automatic mode). The selected mode is activated as soon as the
conditions are fulfilled.
Relevant parameters
Web page:
Home Installer Settings Heating / Cooling Settings
App:
Settings Heating / Cooling
4.1.3 Heating / cooling manual
Selection of these modes overrides the above listed “soft” conditions
(but not digital signals HEATING or COOLING coming from external)
and the selected mode starts immediately.
These modes allow the user to start heating or cooling whenever it is
possible in terms of available supply from boiler or chiller.
This mode can be used for testing during servicing and installation.
4.1.4 Energy levels
The energy level defines not only the temperature set points in the
operating modes HEATING and COOLING, but also the operation of
dehumidifiers and fan coils.
An energy level may be activated manually, by timing program or by
the geofencing function of the App. An energy level is valid for the
complete installation, a selection of rooms or a specific room.
Remark:
The system optimizes the transitions between NORMAL
and REDUCED mode to ensure comfortable conditions and to
reduce energy consumption.
Please note also:
The installed heating or cooling systems have physical limits, which
have to be considered, when set points and timer programs are
defined.
- During summer, e.g., it is not possible to reach a room temperature
of e.g. 21 °C in cooling mode by means of an underfloor cooling
system only
- It makes no sense to define short time spans per energy level trying
to raise/or lower the temperature by 3 degrees for an hour and then
to reverse it again because the underfloor system cannot respond
that quickly
There are 4 dierent energy levels:
NORMAL
Energy level NORMAL should be active when the room is occupied.
Default temperature set points:
Heating: 21 °C
Cooling: 24 °C
REDUCED
Energy level REDUCED should be active when the room is not occupied.
Default temperature set points:
Heating: 19 °C
Cooling: 26 °C
PARTY mode
PARTY mode switches the energy level in the selected rooms to
NORMAL for a default period of 4 hours. When selected via the App,
the activation period can be freely chosen.
HOLIDAY / ABSENCE
Energy level HOLIDAY / ABSENCE is activated for time spans, which
are longer than 1 up to 3 days, (depending on insulation standard of
the building).
Default temperature set points:
Heating: 15 °C
Cooling: not active
The temperature set points for NORMAL, REDUCED
mode (heating/cooling) and HOLIDAY mode (only
heating) can be set on the room configuration pages of the App
or on the web pages.
STANDBY
The energy level STANDBY is used for rooms, which are not used for
an extended period of time.
Default temperature set points:
Heating: 8 °C (freeze protection)
Cooling: not active
The ranking of energy levels in terms of comfort and
energy usage is (from high to low):
NORMAL REDUCED HOLIDAY STANDBY
4.1.5 Selection of energy levels
The above listed energy levels or the way how they are activated
(manual override or by timer program) can be selected using the App
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or the web pages for all rooms (global) or for each room individually.
When the global mode is selected using the web page, it is applied to all
rooms. When the App is used, it is possible to exclude a set of rooms.
On each room unit with a display it is also possible to choose one of
the energy levels for this room only.
Permanent selection
When a energy level is chosen, it is valid until it is changed.
Selection by timer program
The 5 weekly timing programs define the time spans for NORMAL and
REDUCED.
The used weekly timer program can be selected for each room
individually.
Automatic selection by geofencing
When this option is enabled, the system calculates the earliest
expected return time of the user. Room temperatures are kept on a
level, that the desired temperature level can be reached at return time.
Geofencing does not activate rooms which are set permanently
to one of the energy levels.
4.1.6 Rules for overriding individual energy levels by global
setting
When the user selects a global energy level on the web page, this
energy level is applied to all rooms. If for one single room an individual
energy level shall be activated, this can be done on the web page of
this room or on the room unit.
When the App is used, the application proposes a list of rooms, for
the global settings based on the rules listed below:
- General rules (using the App):
- Rooms which are running in timed mode are proposed to follow the
global command
- Rooms which are set to permanent energy level normal, reduced or
standby are not proposed to follow the global command
- Global command STANDBY proposes all rooms to follow
- Global command Party and holiday proposes all rooms which have
been selected the last time
Example 1:
The user selected for his hobby room the energy level REDUCED.
A room, which is only used from time to time for guests, is set to
“holiday/absence”. All other rooms are running in timed mode, the
NORMAL level for these rooms is on working days from 6 h AM until
8 h AM and from 17 h PM to 23 h PM.
One working day, the user stays at home and he switches his
installation to global mode NORMAL.
Reaction of the App:
The App proposes all rooms except hobby room and the room for
guests to follow the global command NORMAL.
Example 2:
Some of the rooms in a house are used permanently or should by any
reasons not be set to lower energy level.
The user is o for several days and activates the holiday function. The
first time he must select the rooms where this function should be
applied. The next time he can just confirm the last selection of rooms.
4.1.7 Temporary room temperature set point change (timed
mode)
Room temperature set points of rooms, which are running in timed
mode, can be changed on the room unit, on web page or by the App.
This new set point is valid until the next switching point of the timing
program occurs.
4.1.8 Permanent room temperature set point change
When a room is in NORMAL or REDUCED, the room temperature set
point modification overrides the previous set point. By this method, it
is possible to (re)define the setpoints of room temperatures without
using the room configuration pages on the App or on the web pages.
Procedure for room unit:
- Select energy level (normal or reduced mode)
- Modify set point
- Go to desired mode (timed, normal, reduced)
- New set point is stored and will be used from now on for this energy
level.
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