IntesisBox DK-RC-MBS-1 User Manual page 10

After a couple of values have been entered in the "AC unit external temperature's
o
reference" (register 22/23) and "AC unit temperature set point" (register 4/5),
DK-RC-MBS-1 is going to estimate the temperature chosen implied (e.g. if a
"temperature setpoint (register 4/5)" of 22ºC, and an "external temperature
reference (register 22/23)" of 20ºC are entered, DK-RC-MBS-1 will assume that
the user is demanding a +2ºC increase in temperature).
By knowing at any time the ambient temperature currently used by the indoor
o
unit to control its own operation (register 5/6), DK-RC-MBS-1 can calculate the
required temperature setpoint needed to apply the decrease/increase on the real
temperature and reach the temperature chosen by the user (following the
example above, if DK-RC-MBS-1 reads an "ambient temperature" (register 5/6)
of 24ºC in the indoor unit, it will apply a final setpoint of 24ºC + 2ºC = 26ºC).
At this moment, each time that DK-RC-MBS-1 detects a change on the ambient
o
temperature reported by the indoor unit (register 5/6), it will also change the
required setpoint, in order to keep the temperature required by the user at any
time. If we follow the last example, if DK-RC-MBS-1 receives a new
temperature´s value coming from the indoor unit of 25ºC, DK-RC-MBS-1 will
automatically adjust the temperature setpoint required of the AC indoor unit to
25ºC + 2ºC = 27ºC).
In general, DK-RC-MBS-1 is constantly applying the "Virtual Temperature"
o
formula:
Where:
- setpoint value currently applied to the indoor unit
S
AC
- setpoint value written at Modbus side (register 4/5)
S
u
- external temperature reference written at Modbus side (register 22/23)
T
u
- ambient temperature that the indoor unit is using as the reference of its
T
AC
own control loop (register 5/6)
When DK-RC-MBS-1 detects a change in any of the values of
{ S
, T
u
After the startup, the value for "external temperature's reference" (register
o
22/23) has a value -32768 (0x8000). This value means that no external
temperature reference is being provided through DK-RC-MBS-1. In this scenario,
the setpoint value shown in register 4/5 is always the same as the current
setpoint value of the indoor unit. The AC indoor unit will use its own return path
temperature sensor as reference for its control loop.
When the mechanism of "Virtual Temperature" is applied. The temperature
o
setpoint's value shown by the Remote Controller or other Control System from
Daikin connected to the indoor unit may show a different value from the value
shown in register 4/5.
If it is desired to use the temperature's reading from the Remote Control as the
o
external temperature reference (T
be configured as Master, and the Daikin AC indoor unit must have the option
"thermostat sensor in the Remote Controller" as activated. This configuration is
done via a Daikin Remote Controller connected to the indoor unit and must be
done by Daikin authorized installers while the AC is being installed.
© Intesis Software S.L.U. - All rights reserved
This information is subject to change without notice
IntesisBox ® is a registered trademark of Intesis Software SLU
DK-RC-MBS-1
S
AC
}, it will send the new setpoint (S
, T
u AC
– ( T – T
= S )
u u AC
) to the indoor unit.
AC
,register 22/33), the Remote Controller must
u
URL
Email
Phone
User's Manual r3.3 EN
http://www.intesisbox.com
info@intesisbox.com
+34 938047134
10/23