Zennio IRSC Zone User manual

IRSC Zone
Zone Climate Controller
ZN1CL-IRSC
USER MANUAL
Application program version: [1.7]
User manual edition: [1.7]_a
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Contents
Document updates ...................................................................................................................3
1 Introduction ......................................................................................................................4
1.1 The IRSC Controller....................................................................................................4
1.2 Installation ................................................................................................................4
1.3 The IRSC Zone application program ...........................................................................6
2 Configuration ....................................................................................................................8
2.1 General concepts.......................................................................................................8
3 ETS Parametrization ..........................................................................................................9
3.1 Default configuration.................................................................................................9
3.2 General....................................................................................................................11
3.3 Mode.......................................................................................................................14
3.4 Fan ..........................................................................................................................16
3.5 Temperature ...........................................................................................................17
3.6 Thermostat..............................................................................................................20
3.7 Reset .......................................................................................................................21
Annex I. Installation Scheme ...................................................................................................23
Annex II. Grille control ............................................................................................................24
Switching zones on / off ......................................................................................................24
Thermostatic control for cooling .........................................................................................25
Thermostatic control for heating.........................................................................................26
Annex III. Practical example ....................................................................................................27
Annex IV. Communication objects...........................................................................................29

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DOCUMENT UPDATES
Version Modifications Page(s)
[1.7]_a
Changes in the application program:
- New parameter added (“Zone update after reset”) to
allow sending read requests for the states, modes and
zone setpoints after bus failures.
- Revision of texts and parameter names.
- Function added to let the device store the current mode
on bus failures even if the machine was off.
- Inversion of the order of certain read requests sent after
reset, in order to avoid unexpected behaviours of the
device (such as when both the normal
mode and the
extended mode read requests receive a response).
- Implementation of the temperature restriction even when
the machine is off, not only when it gets switched on.
- Reset of the variables of the PI control algorithm when
power failures occur.
-
Revision of the description about the “Open bypass if…”
parameter. 12
New parameter added: “Zone update after reset”. 13
Extended description about the temperature restriction
function. 18-19
Revision of the practical example in Annex III. 27
Revision of texts and styles. -
[1.6]_a
Changes in the application program:
Option added
to send read requests to the bus of certain
objects in order to recover the state of the device
after a
download or a device reset from ETS.
-

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1INTRODUCTION
1.1 THE IRSC CONTROLLER
The IRSC controller from Zennio is aimed at controlling air conditioning systems
featuring infrared receivers (such as splits, ducted units with an integrated infrared
interface, etc) through the emulation of their IR remote control systems. In fact, IRSC
combines the following functions into the same device:
Control of the main functionalities of A/C units (On/Off, temperature, mode,
fan speed, etc).
Compatibility with most air conditioning manufacturers (please refer to the
correspondence table, available at: http://www.zennio.com.
Device management through infrared codes:
Split units (application program IRSC PLUS)
A/V systems (application program IRSC OPEN)
Ducted cooling/heating machines, with multiple zones to be acclimated
(application program IRSC Zone)
Figure 1. IRSC Controller
1.2 INSTALLATION
The IRSC controller is connected to the KNX bus via the bus connecting terminals.

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Once the controller is provided with power from the KNX bus, both the physical
address and the associated application program may be downloaded.
In Figure 2, the connection scheme of IRSC is shown.
Figure 2. IRSC Element diagram
The functionality of the main elements is described next.
Programming button (3): a short press on this button sets the device into
the programming mode, making the associated LED (2) light in red. If this
button is held while plugging the device into the KNX bus, IRSC goes into
secure mode.
IR emitter (5): infrared flashing diode to send commands to the air
conditioning system. It must be placed in front of the air conditioning IR
receiver (see Figure 3).
Socket for the aerial connector (6): slot for the insertion of the aerial
connector, through which the IR commands are outputted from IRSC.
Figure 3 shows how to locate the IR emitter (5) in front of the climate system.
Figure 3. IRSC - A/C unit interface
1.- KNX Connector.
2.- Programming LED.
3.- Programming button.
4.- Aerial connector.
5.- IR emitter.
6.- Socket for the aerial connector.
IR receiver

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Once IRSC is connected and properly parameterised, it will be possible to control the
A/C unit from within the installation (for instance, from the InZennio Z38i or InZennio
Z41 touch panels), thus achieving an easier and more intuitive control.
Note: only one air conditioning unit may be controlled by each IRSC.
To obtain detailed information about the technical features of IRSC, as well as on
security and installation procedures, please refer to the device Datasheet, provided
with the original packaging of the device and also available at http://www.zennio.com.
1.3 THE IRSC ZONE APPLICATION PROGRAM
The IRSC Zone application program has been developed for controlling air
cooling/heating ducted machines, thus allowing acclimatizing, within the same KNX
installation, up to 8 rooms (or zones) where the air output is regulated by gates or
motorised grilles. Grilles are the final elements of the air ducts in charge of
distributing the air from the central unit to every zone, and permit outputting the
conditioned air to the different zones.
IRSC Zone is therefore in charge of two complementary functions:
Sending the necessary orders (ON/OFF, temperature, fan, etc) to the central
a/c machine through infrared commands.
Sending the necessary orders to the external KNX actuator that controls the
air grilles.
The independent control of these grilles makes it possible, in short, that a sole machine
with a unique setpoint temperature serves each of the zones as convenient, no matter
if the setpoint temperatures of the zones are different.
The central machine is controlled by taking into account the number of the zones to be
acclimatised, as well as their own setpoints:
The IRSC Zone application program calculates the setpoint temperature that
the central machine needs to be sent depending on what the desired
temperatures for the different zones are.

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It is optionally possible to make this calculation also depend on an additional
feedback temperature, provided by a KNX sensor located next to the air flow
returning to the machine, thus making it possible to correct undesired switch-
offs or adjustments made by the machine itself when it detects that the
ambient temperature of its actual location (which may be subject to punctual
heat or cold sources) is similar to the setpoint, although the ambient
temperatures of the zones are not.
Moreover, this calculation will also consider any “addition temperature” other
than zero that may have been parameterised (see Section 3.5).
Apart from sending temperature setpoints and other orders to the air machine, IRSC is,
as already stated, responsible for controlling the air grilles of the zones, which implies
selecting and applying an algorithm, which, depending on the setpoint and reference
temperatures of every zone, will continuously determine whether the grille of each zone
must stay open or not.
All the concepts mentioned so far are explained in detail in section 3. For further details
and for a complete example, please refer to the Annexes of this manual.

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2CONFIGURATION
2.1 GENERAL CONCEPTS
The IRSC Zone application program permits controlling air conditioning systems from
different manufacturers as if they were being controlled through the infrared remote
control of the machine.
A correspondence table is available at the Zennio homepage (http://www.zennio.com)
with the codes (from 0 to 255) corresponding to the different remote controls that can
be emulated. This number is the first parameter to be set in ETS, so that the orders
sent by IRSC become particularised for the actual A/C unit to be controlled.
The IRSC Zone application also allows selecting the number of the zones of the KNX
installation that will be controlled by the same central A/C machine, which can be 1 – 8.
Moreover, the following functionalities of the A/C system can be controlled by IRSC:
Switching ON/OFF each of the enabled zones.
Setpoint temperature of each enabled zone.
Working mode:the desired working mode (Automatic, Heat, Cool, Fan, Dry)
may be chosen through independent binary objects (one per mode) or
through a sole object (only one object for the mode selection). Moreover,
apart from these conventional controls, it is possible to enable a simplified
control, which only permits commuting from Heat to Cold and vice versa.
Fan speed:step-controlled or through a precise control.
Thermostat: it is possible to enable and configure this functionality for Heat
mode, Cool mode or both.
For further details and examples please refer to the Annexes of this manual.

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3ETS PARAMETRIZATION
To begin with the parameterization process of the IRSC controller it is necessary, once
the data base of the product (IRSC Zone application program) has been imported to
ETS, to add the device to the project where desired. After that, one right-click on the
device will permit selecting "Edit parameters", in order to start the configuration.
In the following sections a detailed explanation can be found about the different
functionalities of IRSC Zone available in ETS.
3.1 DEFAULT CONFIGURATION
This section shows the default configuration the device parameterization starts from for
the first time.
Figure 4. IRSC Zone Default topology
The following communication objects appear: "A/C Unit - ON/OFF status", "A/C Unit -
Setpoint status" and "A/C Unit - fan status", all of which will report basic information
about the states of the A/C unit (ON/OFF, setpoint and fan speed).
Seven more objects, of different lengths, are shown, referred to different functionalities
that may be controlled for Zone 1 (Zone 1 is the only zone enabled by default). These
are (“X” means 1 here):
Zone X – ON/OFF: permits turning ON or OFF each of the enabled zones
independently. Being ON implies a normal function of the zone, i.e., the
automatic control of its airing grille and the inclusion of its setpoint
temperature into the calculation process of the general setpoint temperature
sent to the air conditioning machine. On the other hand, when a zone is

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turned OFF, an order to close the grille is sent to the bus, after which the
setpoint of the zone is not considered anymore (until the zone is turned on
again) for the calculation of the central setpoint.
Zone X – ON/OFF Status: indicates the current state (ON/OFF) of the
corresponding zone.
Zone X – Setpoint: permits receiving orders from the bus to change the
desired setpoint temperature (in ºC) for the corresponding zone.
Zone X – Setpoint Status: indicates the current value (in ºC) of the setpoint
temperature of the corresponding zone.
Zone X – Grille control: sends orders (“0”=Close, “1”=Open) to the bus to
control the airing grille of the corresponding zone.
Zone X – Grille Status Reception: permits the arrival from the bus of
open/close orders for the airing grille of the corresponding zone, which –when
appropriate– makes the device respond sending an updated order to the bus
through the “Zone X – Grille control” object.
Zone X – Reference temperature: permits the reception from the bus of a
reference temperature, for example measured by a sensor installed inside the
corresponding zone.
If more zones are enabled (see section 3.2), the same seven objects will be available
for the remaining zones, with a different value for “X” in each case.
When entering the parameter edition of IRSC Zone for the first time, the following
window will be shown:
Figure 5. Configuration screen by default