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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IRSC Zone

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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

IRSC Zone

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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.

IRSC Zone

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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.

IRSC Zone

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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

IRSC Zone

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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.

IRSC Zone

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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.

IRSC Zone

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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.

IRSC Zone

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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

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