Compressor Management; Safety Times - Carel k.Air User Manual

ENG
9.10
Direct expansion
with integrated
management
90 | 9. Functions
Ref Description
Preheating coil number of pumps
Preheating coil pump flow check startup delay
Db09 Preheating coil pump flow check run delay
Preheating coil pump enable antilock function
Preheating coil pump rotation time
Db12 Coil floating valve: Running time
Dc01 Reheating coil number of steps
Reheating PID parameters - Proportional gain
Dc03
Reheating PID parameters - Integral time
Dc06 Reheating coil request during antifreeze off status
Reheating coil number of pumps
Reheating coil pump flow check startup delay
Dc09 Reheating coil pump flow check run delay
Reheating coil pump enable antilock function
Reheating coil pump rotation time
Dc12 Coil floating valve: Running time

9.10.1 Compressor management

k.air manages ON/OFF compressors with direct starting or modulating BLDC compressors. For BLDC
compressors, more than 200 models can be selected. A BLDC compressor is always driven by a Power+
inverter connected via Modbus (Fieldbus or Fieldbus2)
Ref Description
UNIT
Preheating coil type
Ac08 Main coil type
Reheating coil type
As soon as the controller recognises the compressor, it automatically writes the compressor motor
electrical parameters to the Power+ driver. If a Power+ driver that has already been configured is then
used to manage a different compressor, run the "write default" command.
Note: if replacing the Power+ inverter, the electrical parameters will be automatically updated only
with the Auto- install parameters option (Uc10); otherwise, following replacement and wiring, the
"write default" command needs to be run in Uc08.

9.10.2 Safety times

k.air guarantees compressor safety times, such as:
Minimum on time
l
Minimum off time
l
Minimum time between consecutive starts
l
These times are available in the Compressor menu, together with the PID parameters, and can be set by
accessing the Service level with the unit OFF.
DEV Min Max UoM Dir Modbus BACnet
0 0 2
15 0 999
5 0 999
TRUE 0 1
24 0 999
180 1 999
1 1 4
8.0 0.0 999.9
120 0 999
50.0 0.0 100.0 % R/W HR1681 AV3176
0 0 2
15 0 999
5 0 999
TRUE 0 1
24 0 999
180 1 999
DEV Min Max UoM Dir
0 0 5 - R/W
0 0 7 - R/W
0 0 5 - R/W
k.Air +030220981 rel. 1.1 – 31.03.2020
- R/W HR1674 PIV3169
s R/W HR1675 PIV3170
s R/W HR1676 PIV3171
- R/W CS294 BV294
h R/W HR1677 PIV3172
s R/W HR1914 PIV3940
- R/W HR1678 PIV3173
- R/W HR1679 AV3174
- R/W HR1680 PIV3175
- R/W HR1682 PIV3177
s R/W HR1683 PIV3178
s R/W HR1684 PIV3179
- R/W CS295 BV295
h R/W HR1685 PIV3180
s R/W HR1914 PIV3940
Modbus BACnet
HR1296 PIV2804
HR1297 PIV2805
HR1298 PIV2806