Component Selection; Starting Point; Minimum And Maximum Configurations - Rehau NEA SMART 2.0 Service Manual

5 COMPONENT SELECTION

5.1

Starting Point

The components of the NEA SMART 2.0 system allow a high degree
of customization in regards to inputs.
The following basic need to be known before the system components
can be selected:
Minimum information:
Number of rooms
- to define the number of Room units/ probes
needed
Number of pipe loops
- to define the number of actuators and
actuators outputs needed
- Number of manifolds and their position
NEA SMART 2.0 Bases and R-Modules needed
Optional information:
- Number of mixed circuits to define number of U-Modules needed
- Number of dehumidifiers to define number of NEA SMART 2.0
Bases and R-Modules and U-Modules
- Number of remote sensors, dew point monitors or hard wired
window contacts that will be connected to Room units
Number of pumps
-
- Any heat generator (boiler, heat pump, ...)
cold generators
- Any (chiller, heat pump, ...)
- Other appliances that require an digital input or output for correct
function (see below for examples)
If the NEA SMART 2.0 is part of a heating and cooling installation
clarification is to be sought on which system (NEA SMART 2.0 or
another system in the installation, e.g. BMS), will take the lead in
deciding the overall operating mode (heating or cooling ...) of the
installation. Both scenarios are possible but the required inputs/
outputs may differ.
Inputs and / or outputs required for optional functions are:
Digital Outputs:
- Global and local pumps
- Heat / cool generator
- Switching valves, e.g. for heating or cooling
- Change over signal heating / cooling
- Control of dehumidifiers
- Any other devices
Digital Inputs:
- External input to switch the NEA SMART 2.0 installation to reduced
mode or absent mode
- Dew point monitor to give signal when condensation takes place
38
- External change over signal heating / cooling
- Any other devices
5.2
NEA SMART 2.0 Base
- Max. 8 rooms
- Max. 12 actuators
- Max. 4 digital outputs
- Max. 4 digital inputs
The maximum number of possible thermal actuators connected to
each of the 8 channels is limited and starting from channel 1 in
to define the number of ascending order is as follows: 2-2-1-1-2-2-1-1.
Every NEA SMART 2.0 Base can have a maximum of
SMART 2.0 R-Module connected to it.
NEA SMART 2.0 R-Module
- Max. 4 rooms
- Max. 8 actuators (two per channel)
- Max. 2 digital outputs
- Max. 1 digital inputs
A single
- Flow temperature / mixed circuit or
- Up to 2 dehumidifiers
The minimum configuration of a NEA SMART 2.0 systems is:
- 1 NEA SMART 2.0 Transformer (if Base 24 V is used)
- 1 NEA SMART 2.0 Base
- 1 NEA SMART 2.0 Room unit
- 1 actuator
The maximum capacity of a NEA SMART 2.0 system is:
- 5 NEA SMART 2.0 Bases
- 5 NEA SMART 2.0 R-Modules (but not more than the number of
base)
- 5 NEA SMART 2.0 U-Modules
In the maximum configuration the NEA SMART 2.0 can control:
- 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.

Minimum and maximum configurations

NEA SMART 2.0 U-Module
can control the following:
one NEA