Carel k.Air, Руководство пользователя, Страница: 104 / 192

104
Functions
k.air +030220981 rel. 1.2 - 01.12.2020
Enable start-up or operating mode signal
k.air and k.water can mutually send and receive signals to enable start- up and change the operating mode. This makes it easier
to start the entire system and change operating mode using just one single command, chosen from among those available on
the network.
The possible interactions are:
• general signal to enable k.air from k.water, set on k.air screen Ac80
• change operating mode on k.air from k.water, set on k.air screen Ac22
• general signal to enable k.water from an online k.air, set on k.water screen Ba06
• change operating mode on k.water from a k.air in the network, set on k.water screen Ba07
Important: do not reciprocate the enabling or change mode signals between k.air and k.water.
Note:
it is not recommended to use change k.water operating mode from k.air with automatic heating/cooling control, as
the k.air control temperatures will dynamically change the k.water operating mode.
Dehumidifi cation optimisation
k.air and k.water interact with each other to optimise the dehumidifi cation function in radiant cooling systems. k.air receives a
dehumidifi cation set point, calculated by k.water based on the conditions in the radiant cooling circuits, either mixed or mixed
plus circuits. k.water considers the lowest temperature from all of the active mixed and mixed plus circuits. This option can be
enabled on screen Ac34, only when the absolute humidity control option is enabled on screen Ac32. The calculated set point
will be available on the info screen Qa24, and in any case considers the set point set by the user, with control based on the lower
of the two (always converted into an absolute humidity value).
Commissioning
k.air - k.water integration, after the network wiring has been completed, is
activated using the auto discovery function on k.water. Go to k.water scre-
en Fe12 and follow the procedure described in the 030220990. At the end of the procedure, the integrated
HMI, available as webserver and pGDx, will
show the k.air navigation menu.
Mkair config. Fe12
Auto discovery:
Device checked: 4/10
30220980_131_R01
30220980_256_R01
Fig. 9.bc
R if D escription D ev Min Max UoM D ir Modbus BAC net
U N IT
Ac22 Machine type (0: COOLING; 1: HEATING; 2: COOL/HEAT) 2 0 2 - R/W HR1310 PIV2818
Machine type cooling/heating enabled - 0 1 - R DI700 BV1158
Unit cooling heating mode confi guration 0 0 6 - R/W HR1311 PIV2819
Auxiliary regulation type 0 0 4 - R/W HR1389 PIV2897
Ac80 Enable on/off request by BMS - 0 1 - R/W CS234 BV234
OnOff by k.water enabling FALSE 0 1 - R/W CS235 BV235
Tab. 9.bl
R if D escription D ev Min Max UoM D ir Modbus BAC net
S ETTI NGS
Y065 PGDx Browser - MAC Address Last Four Digit - Part 1 - 48 48 101 - R/W HR1900 PIV3380
PGDx Browser - MAC Address Last Four Digit - Part 2 - 48 48 101 - R/W HR1901 PIV3381
PGDx Browser - MAC Address Last Four Digit - Part 3 - 48 48 101 - R/W HR1902 PIV3382
PGDx Browser - MAC Address Last Four Digit - Part 4 - 48 48 101 - R/W HR1903 PIV3383
pGDx - Room temperature - -99.9 99.9 °C R - -
pGDx - Room humidity - 0.0 99.9 %rh R - -
Tab. 9.bm
R if D escription D ev Min Max UoM D ir Modbus BAC net
I NFOR M A TI ONS
Qa45 KWater modbus variables - Cooling/Heating mode - 0 1 - R DI660 BV1118
KWater modbus variables - External temperature - -999.9 999.9 - R IR258 AV3646
KWater modbus variables - KAir circuit temperature - -999.9 999.9 - R IR259 AV3647
Unit status kwater - 0 99 - R IR260 PIV3648
Tab. 9.bn