Smart Functions; Flow Temperature Control; Dehumidification; Over The Air Update (Ota) - Rehau NEA SMART 2.0 Service Manual

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 efficiency
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)
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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 different 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