Carel k.Air, Руководство пользователя, Страница: 69 / 192

69
Functions k.air +030220981 rel. 1.2 - 01.12.2020
Table showing the maximum range of connectable inputs/outputs.
Taken from the uChiller manual.
Input/output
channel
D escription
Input/output
channel
D escription
S1 ID5 Remote alarm (close contact if not used)
S2 ID6 -
S3 Drain temperature NO1 Compressor 1
S4 Condensing pressure NO2 Compressor 2
S5 Evaporation pressure NO3 -
S6 - NO4 Reversing valve
S7 Suction temperature NO5 Alarm
ID1 Close contact NO6 -
ID2 Compressor 1 thermal protector Y1 Condenser fan
ID3 High pressure switch Y2 -
ID4 Compressor 2 thermal protector Tab. 9.v
Procedure for integrating uChiller
1. Analysis and design of the refrigeration unit, evaluating the specifi c operations, such as defrost requirements.
2. Read the uChiller manual (+0300053EN) carefully, so as to understand the connections and parameters needed for correct
confi guration.
3. Electrical wiring of the refrigeration unit components and serial connection from J4 BMS on uChiller to the J26FBus2/J4Fbus
port on k.air.
4. Using the Applica or uChiller display app, confi gure the parameters relating to the refrigeration unit.
5. Set parameter Hd00 (supervisor address) to 10.
6. On the k.air pGDE terminal, enable the main coil as uChiller on screen Ac08, and set the operating mode on Da01.
7. k.air with uChiller direct expansion is now operational.
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.w
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
Tab. 9.x
9.12 Indirect evaporative cooling (IE C )
The possibility of heat recovery in temperate climates is further increased by the use of indirect evaporative cooling. Before
being discharged and passing through the heat recovery unit, the exhaust air is further humidifi ed: its temperature thus de-
creases, meaning it can be used to exchange heat with the fresh outside air, which is cooled without undergoing a change in
humidity.
IEC is a further stage in the temperature control sequence and, due to its high energy effi
ciency, is used after freecooling/reco-
very and before the main coil. The air handling unit must be equipped with a non- enthalpy type heat recovery unit. IEC control
may be On/Off or modulating, or via serial communication with compatible CAREL systems. The type of control is selected on
screen AC04. Operation of this function can be described by chain logic: activation, control and management of limits.