Carel k.Air, Руководство пользователя, Страница: 64 / 192

64
Functions
k.air +030220981 rel. 1.2 - 01.12.2020
Direct expansion coil with μChiller management
The uChiller direct expansion architecture involves modular architecture, with the refrigerant circuit managed by an external
uChiller controller, connected via the Fieldbus serial port available on k.air. This allows to the refrigeration unit to be expanded
to include two circuits with two compressors each, either on/off or BLDC. Unlike integrated direct expansion management, the
source heat exchanger is managed externally from the air handling unit, via a condensing/evaporation signal.
See the chapter “Direct expansion with uChiller” for more information.
R if D escription D ev Min Max UoM D ir Modbus BAC net
CO IL S
Da01 Main coil confi guration 2 0 2 - R/W HR1654 PIV3149
Main coil steps number 1 1 4 - R/W HR1655 PIV3150
Compressor type (FALSE: ON/OFF; TRUE: BLDC) TRUE 0 1 - R/W CS291 BV291
Enable EVD emb management TRUE 0 1 - R/W CS292 BV292
Da03 Cooling coil PID parameters - Proportional gain 8.0 0.0 999.9 - R/W HR1656 AV3151
Cooling coil PID parameters - Integral time 120 0 999 - R/W HR1657 PIV3152
Da06 Heating coil PID parameters - Proportional gain 8.0 0.0 999.9 - R/W HR1658 AV3153
Heating coil PID parameters - Integral time 120 0 999 - R/W HR1659 PIV3154
Da09 Dehumidifi cation PID parameters - Proportional gain 8.0 0.0 999.9 - R/W HR1660 AV3155
Dehumidifi cation PID parameters - Integral time 120 0 999 - R/W HR1661 PIV3156
Dehumidifi cation PID parameters - Derivative time 0 0 999 - R/W HR1662 PIV3157
Maximum dehumidifi cation off set 2.0 -99.9 99.9 K R/W HR1663 AV3158
Da12 Heating coil request during antifreeze off status 50.0 0.0 100.0 % R/W HR1664 AV3159
Da18 Cooling coil request during antifreeze off status 50.0 0.0 100.0 % R/W HR1665 AV3160
Da21 Cooling/Heating coil pumps number 0 0 2 - R/W HR1666 PIV3161
Cooling/Heating coil pumps fl ow check startup delay 15 0 999 s R/W HR1667 PIV3162
Cooling/Heating coil pumps fl ow check run delay 5 0 999 s R/W HR1668 PIV3163
Cooling/Heating coil pumps enable antilock function TRUE 0 1 - R/W CS293 BV293
Cooling/Heating coil pumps rotation time 24 0 999 h R/W HR1669 PIV3164
Da24 Coil fl oating valve:Running time 180 1 999 s R/W HR1914 PIV3940
Db01 PreHeating coil steps number 1 1 4 - R/W HR1670 PIV3165
Db03 Pre heating PID parameters - Proportional gain 8.0 0.0 999.9 - R/W HR1671 AV3166
Pre heating PID parameters - Integral time 120 0 999 - R/W HR1672 PIV3167
Db06 PreHeating coil request during antifreeze off status 50.0 0.0 100.0 % R/W HR1673 AV3168
Db09 PreHeating coil pumps number 0 0 2 - R/W HR1674 PIV3169
PreHeating coil pumps fl ow check startup delay 15 0 999 s R/W HR1675 PIV3170
PreHeating coil pumps fl ow check run delay 5 0 999 s R/W HR1676 PIV3171
PreHeating coil pumps enable antilock function TRUE 0 1 - R/W CS294 BV294
PreHeating coil pumps rotation time 24 0 999 h R/W HR1677 PIV3172
Db12 Coil fl oating valve:Running time 180 1 999 s R/W HR1914 PIV3940
Dc01 PostHeating coil steps number 1 1 4 - R/W HR1678 PIV3173
Dc03 Post heating PID parameters - Proportional gain 8.0 0.0 999.9 - R/W HR1679 AV3174
Post heating PID parameters - Integral time 120 0 999 - R/W HR1680 PIV3175
Dc06 PostHeating coil request during antifreeze off status 50.0 0.0 100.0 % R/W HR1681 AV3176
Dc09 Post Heating coil pumps number 0 0 2 - R/W HR1682 PIV3177
Re Heating coil pumps fl ow check startup delay 15 0 999 s R/W HR1683 PIV3178
ReHeating coil pumps fl ow check run delay 5 0 999 s R/W HR1684 PIV3179
Re Heating coil pumps enable antilock function TRUE 0 1 - R/W CS295 BV295
Re Heating coil pumps rotation time 24 0 999 h R/W HR1685 PIV3180
Dc12 Coil fl oating valve:Running time 180 1 999 s R/W HR1914 PIV3940
Tab. 9.t
9.10 D irect expansion with integrated management
9.10.1 C ompressor 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)
R if D escription D ev Min Max UoM D ir Modbus BAC net
U N IT
Ac08 PreHeating coil type 0 0 5 - R/W HR1296 PIV2804
Main coil type 0 0 7 - R/W HR1297 PIV2805
PostHeating coil type 0 0 5 - R/W HR1298 PIV2806
Tab. 9.u