![background image](http://html1.mh-extra.com/html/zennio/irsc-zone/irsc-zone_user-manual_3484476019.webp)
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).