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
www.zennio.com

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
2
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
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
3
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
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
4
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
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
5
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
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
6
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
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
7
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
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
8
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
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
9
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

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
10
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

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
11
As seen in Figure 5, the configuration screen is divided into the following main tabs:
General: general configuration of the basic functionalities of the air
conditioning system to be controlled.
Mode: mode selection type permitted by the A/C machine.
Fan: parameters related to the control of the fan speed of the A/C machine.
Temperature: parameters related to the temperature setpoint sent to the A/C
machine.
Thermostat: selection and configuration of the parameters related to the
thermostat, both for the Cool and the Heat modes.
Reset: selection of whether to send or not the different states of the A/C
machine to the KNX bus after a bus power failure or after an application or
parameter download.
All the aforementioned tabs are explained in detail in the next sections.
3.2 GENERAL
As shown in Figure 5, from the General window it is possible to configure the main
parameters of the A/C system being controlled. These are:
Model: sets the code number (between 0 and 255) associated to the model
of the A/C machine to be controlled (please refer to the correspondence table
at http://www.zennio.com).
No. of zones: selects how many zones are to be acclimatised (from 1 to 8).
Depending on the number established here, 7 communication objects will
appear associated to each zone (those associated to Zone 1 are enabled by
default), making it possible to send and/or receive different orders related to
the acclimatization of the zone: On/Off, Setpoint, Grille control and reference
temperature (see section 3.1).
Shut down A/C unit if all grilles are OFF: this parameter allows defining the
behaviour of the A/C machine when the grilles of all the enabled zones are

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
12
closed. If this parameter is enabled ("Yes"), when all the grilles are closed
(i.e., all the "Zone x - Grille control" objects have the value "0") the A/C
machine will be switched off. This option may be interesting for systems with
thermally driven grilles. Note that although a grille closed does not imply that
its zone has been switched off, the opposite does apply.
Delay to turn ON A/C if any grille is ON: field to set the time, in seconds,
the device will wait before switching the A/C unit on after a grille is opened
again ("Zone x - Grille control"=1).
Additional bypass: the activation ("Yes") of this parameter allows controlling
a bypass or additional grille through which the exceeding air conditioned from
the installation could be canalised, thus preventing over-pressure.
Open bypass if no. of open grilles lower or equal than: defines the
maximum permitted number of closed grilles (from 0 to 8) before an order
to open the bypass is forced (via the object "Additional bypass"). In other
words, the bypass will stay open while the number of open grilles is equal
or lower than the number set for this parameter. For instance, if the value
“4” is established here, the bypass will stay open while the number of open
grilles is 4, 3, 2, 1 or 0 (in the case of 0, this will be true only if the machine
is ON). Note that no matter what the value of this parameter is, the bypass
will stay open if the A/C machine is ON and all the grilles are closed.
Zone update on start-up: permits activating or deactivating the sending of
certain read requests to the bus after a download or a device reset order from
ETS. These requests make it possible for IRSC Zone to assimilate the state
of the environment (setpoints, temperatures, modes) at the moment of
beginning to function. Read orders are therefore sent through the following
objects, for every enabled zone:
Zone X – ON/OFF
Zone X – Setpoint
Zone X – Reference Temperature
Read orders will also be sent through the following control objects, if enabled:

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
13
A / C Unit – Modes
A / C Unit – Simplified mode
A / C Unit – Fan precise
Temperature restriction
It is important that the communication objects being requested are linked
(through the same group addresses) to those from any external device aware
of the state at any time, and that the Read flag (“R”) is enabled for them.
Otherwise IRSC Zone may not be able to receive feedback from them.
Consequently, instead of adopting the default values, IRSC-Zone will listen to
the responses received from the KNX environment, therefore making it
possible that IRSC-Zone recovers the control over a concrete situation
(where, for instance, certain zone setpoints have already been set) no matter
if successive downloads or resets from ETS take place, and without the need
of acting again over the user interfaces (such as the InZennio Z41 touch
pannel) that let the user set those values and therefore make IRSC-Zone
aware of them. It is recommended, however, to enable sending the statuses
to the bus on start-up (see section 3.7), so that the actual status of the grilles
matches at any time the one assumed or calculated by the controller, for
example, after a download.
Enabling this parameter also brings the following two:
Delay [x 1 sec]: sets a certain delay to be counted since the end of the
start-up process of the device, before the corresponding read requests are
sent to the bus.
Zone update after reset?: if this parameter is enabled, the already
mentioned read requests will also take place after power failures or after
disconnecting and connecting the device.
Note:if one or more particular objects do not get a response to their read
requests, they will maintain their default values. On the other hand, if IRSC
Zone does receive a response to the read request of the ON/OFF, Setpoint
and Reference Temperature objects before having the response to the read

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
14
request of the Mode object, the calculation of the general setpoint and the
grille control will take place by initially assuming the default mode (Cool). If
afterwards a response is received to the Mode request and it turns to be other
than Cool, this control will be restarted and, typically, new sendings to the unit
will occur, as well as, if needed, a change in the grille status.
3.3 MODE
The Mode window allows configuring features related to the selection of the operating
mode of the A/C machine, which is made assuming that the A/C machine supports the
selection of up to five working modes:
Cool: intended for zone cooling. When IRSC Zone receives an order to
commute to this mode, it sends the corresponding mode switch order to the
unit, and begins to control the grilles of every zone according to how the
thermostat control for cooling has been parameterised, and to whether the
reference temperatures are higher or not than the setpoints (see section 3.6
as well as Annex II. Grille control and Annex III. Practical example). In relation
to the calculation of the general setpoint, mode “Cold” implies, on the one
hand, switching from one range of accepted setpoint temperatures to another
range of accepted setpoint temperatures (see Section 3.5). And on the other
hand, the fact that the general setpoint temperature must be lower or equal
than the coolest of the zone setpoint temperatures.
Heat:intended for zone heating. When IRSC Zone receives an order to
commute to this mode, it sends the corresponding mode switch order to the
unit, and begins to control the grilles of every zone according to how the
thermostat control for heating has been parameterised, and to whether the
reference temperatures are higher or not than the setpoints (see section 3.6
as well as Annex II. Grille control and Annex III. Practical example). In relation
to the calculation of the general setpoint, mode “Heat” implies, on the one
hand, switching from one range of accepted setpoint temperatures to another
range of accepted setpoint temperatures (see section 3.5). And on the other
hand, the fact that the general setpoint temperature must be greater or equal
than the hottest of the zone setpoint temperatures.

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
15
Auto:destined to let the machine decide by itself how to behave at each
moment (sending cold air / sending hot air). In relation to the calculation of
the general setpoint and to the grille control, under the “Auto” mode IRSC
Zone will behave as under the “Cool” mode.
Fan: destined to generate a simple air flow, typically at ambient temperature,
from the air conditioning machine. When this mode begins, IRSC Zone keeps
the air grilles of every enabled zone permanently open
Dry:destined to generate a dry air flow, typically at ambient temperature,
from the air conditioner machine, so that the humidity in the air is reduced.
As shown in Figure 6, the Mode window allows configuring the commutation from one
mode to another will be performed:
Figure 6. Mode window
Individual control: when this option is selected, all the described working
modes will be selectable through one specific 1-bit communication: this
means that 5 objects will be deployed for establishing one of the available
modes (Auto, Cool, Fan, Heat and Dry), by sending the value "1" through
them, as well as 5 more objects for reflecting the status (active, not active) of
every individual mode.
1 byte control: when this option is selected, the working modes can be
controlled through a unique 1-byte communication object, "A/C Unit - Modes
[1 byte]", by sending the value corresponding to the mode to be activated. It is
also possible to check at any time the current working mode of the A/C unit,
via the 1-byte object "A/C Unit - Modes Status [1 byte]".
Simplified control:when this option is selected, the 1-bit object "A/C Unit -
Simplified Mode" will be enabled. It allows establishing the desired mode:

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
16
Cool mode (writing the value "0" in the object), or Heat mode (writing the
value "1"). There is no status object associated to this control object.
The three control types can be enabled jointly, making it possible to control the
functioning mode by alternative means at any time. Note that, anyway, changing from
one mode to another has two major consequences: first, the sending of the mode
switch order to the machine; and second, switching IRSC Zone (when required) from
one thermostat and grille control type to another.
Note: the algorithm for controlling the zone airing grilles (open/close) is available in
Annex II. Grille control. In addition, section 3.5 and Annex III. Practical example explain
the calculation process of the general setpoint, based on the zone setpoint
temperatures and the current working mode.
3.4 FAN
The Fan window allows selecting how the fan speed control of the A/C machine will be
performed
Figure 7. Fan window
Fan restriction based on the no. of open grilles: if this parameter is
enabled ("Yes"), it will be possible to limit the air flow from the A/C unit
according to the number of open grilles. The levels that may be set are: “Only
Medium”, “Only Minimum” or “Medium and Minimum”. Depending on the
selected option, one of the following boxes will be shown (or both, if “Medium
and Minimum” is selected).
Force minimum fan under: sets the minimum number of grilles that must
be open before it is permitted to leave the minimum fan speed (object "A/C
unit - Fan status" will reflect the current fan speed; see Table 1).

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
17
Force medium fan under: sets the minimum number of grilles that must
be open before it is permitted to commute from the medium fan speed to
the maximum fan speed (object "A/C unit - Fan status" will reflect the
current fan level; see Table 1).
Initial speed percentage Interpolated speed percentage Level
0% 0% Auto
1-33% 33% Minimum
34-66% 66% Medium
67-100% 100% Maximum
Table 1. Fan speed percentages
Step control:selecting this option ("Yes") brings the 1-bit object "A/C unit -
Fan step", which allows increasing (sending the value "1") or decreasing
(value "0") the fan speed by one level (for example, under the minimum level
of speed, if the value "1" is sent via this fan step object, the speed will
become medium).
Precise control: selecting this option ("Yes") brings the 1-byte object "A/C
unit - Fan precise", which allows establishing the value, in percentage, of the
desired fan speed level, according to the values shown in Table 1.
Step control and Precise control can be jointly enabled, so that the fan speed can be
controlled in one manner or other at any time, as desired.
3.5 TEMPERATURE
From this window it is possible to configure several parameters related to the setpoint
temperature sent to the A/C Unit.
Note that the parameters shown below do not apply in modes “Auto”, “Fan” or “Dry”.

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
18
Figure 8. Temperature window
Temperature range (only for Heat and Cool modes):it is possible to define
limits for the setpoint temperature sent to the machine of each mode:
Cool mode min. temperature:establishes the minimum general setpoint
temperature, in ºC, allowed for the Cool mode. This value must be in the
range 16-30ºC.
Heat mode max. temperature: establishes the maximum setpoint
temperature, in ºC, allowed for the Heat mode. This value must be in the
range 16-30ºC.
Once this option has been enabled, the “Temperature restriction” 1-bit object
becomes available, with value “1” by default. Temperatures will be subject to
the above limits only while the value of this object is "1". The value “0”, on the
other hand, means that the parameterised restriction should be escaped.
If a setpoint over the maximum limit or under the minimum level is calculated
while the temperature restriction is active, the setpoint value effectively sent
to the A/C unit will become truncated to the corresponding limit.
Note: the setpoint temperature sent to the machine may exceed the
parameterised restrictions (even if the “Temperature restriction” object has
the value “1”) in the case of having parameterised a calibration (parameter
“Increase (heat) / Decrease (cool) temperature sent to the A/C unit by”,
explained below) or if the “Temperature returned from external sensor”
parameter, explained next, is enabled.

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
19
Note 2:some particular details apply in case of enabling the temperature
restriction together with the Calibration or the External return temperature
functions. For further details, please refer to Annex III. Practical example.
Temperature returned from external sensor: this parameter can be
optionally enabled, if a return air duct exists, with the aim of adapting the
general setpoint calculation process in certain cases when a heat or cool
source is affecting the temperature of the returned air that arrives back to the
machine, while it does not affect the ambient temperature of the enabled
zones. When enabled, this parameter deploys a 2-byte object, “External
Temperature Returned”, to be linked to a KNX sensor (see Annex I to better
identify the proper location for the sensor in the installation). During the
calculation of the general setpoint, IRSC Zone will consider this return
temperature as an additional reference, so it will compare it to the setpoints of
the different zones that are ON at that moment. If the return temperature is
higher (mode “Heat”) or lower (mode “Cool”) than the desired temperatures
for the zones, IRSC Zone will require the machine to make an “extra effort”,
and will send (through the “A/C Unit – Setpoint Status” object) a general
setpoint equal to the return temperature increased (mode “Heat”) or
decreased (mode “Cool”) by 1ºC. It is recommended to read the application
example in Annex III. Practical example for a better comprehension.
Note: it is necessary that the external KNX sensor periodically sends the measured
temperature (the period should not be more than one hour). In case IRSC Zone does
not receive any temperature through the Returned Temperature object within 60
minutes, it will stop taking into account this external temperature for the calculation
process.
Increase (heat) / Decrease (cool) temperature sent to the A/C unit by:
sets an additional temperature value (calibration), in ºC, which will be taken
into account while calculating the setpoint temperature that will be sent to the
A/C unit. Depending on the current working mode of the machine (Heat or
Cool), this value will be added or subtracted, respectively, to the resulting
temperature (after applying the restrictions and the comparison to the
returned temperature, if they apply).

IRSC Zone
http://www.zennio.com Technical Support: http://zennioenglish.zendesk.com
20
To better understand all these concepts, an application example has been included in
Annex III. Practical example of this manual.
3.6 THERMOSTAT
From the Thermostat window it is possible to enable and configure the thermostat
functionality for cooling, heating or both.
In the case of not enabling a certain thermostatic control (the one for cooling, the one
for heating or both), the status of the grilles will be determined by the status of their
zone (zone ON, grille open; zone OFF, grille closed).
Figure 9. Thermostat window
Both, the Cool thermostat and the Heat thermostat, admit the following configurable
parameters:
Control type: permits selecting one of these options: 2-point control or PI
control (PWM).
2-point control
•Lower/Upper hysteresis: the desired value, in tenths of a degree, for the
lower and upper hysteresis, respectively.
PI control (PWM)