Cooling; Cooling Coil Chilled Water (Cclchw21Y) - Siemens Climatix S300 HRV Application Manual

5.11 Cooling

5.11.1 Cooling coil chilled water (CclChw21y)

Available parameters
A6V10733786_en_c
Additional cooling is used when the ERC is not available for cooling, is locked for
cooling, or is available for cooling but has reached its maximum position. To
release cooling, the supply air temperature must rise above the setpoint plus the
cooling difference.
With free cooling, the room can be cooled without energy consumption.
If possible, cooling is supported by a brine winding or a ground collector.
If ERC cannot maintain the supply air temperature setpoint, chilled water cooling
coil can be activated and controlled as second cooling sequence.
After activation, the cooling coil pump is activated and the cooling coil valve is
controlled so that the supply air temperature is kept at the setpoint. The pump runs
depending on the valve position (fixed switch-on point 5 %).
Current value
Setpoint supply air temp. cooling for cooling coil
Cooling valve position
Prio2: Fire / Smoke
Prio5: Protection from plant control
Cooling pump command
Prio2: Fire / Smoke
Prio5: Protection from plant control
Special settings:
Cooling Kp
Cooling Tn
Testing and debugging
Cooling coil device mode
Prio2: Fire / Smoke
Prio4: Overtemperature protection
Prio5: Protection from plant control
Application functionalities
BACnet object
SpTSuCcl
AVAL,222
CclVlvPos
AO,109 (A1)
AO,118 (A2)
AO,127 (A3)
AO,136 (A4)
AVAL,388 (POS9)
AVAL,477 (AO1)
AVAL,484 (AO2)
CclPuCmd
BO,58 (Q1)
BO,73 (Q2)
BO,88 (Q3)
BVAL,249 (POS9)
BACnet object
GainCclTSuCtrC
AVAL,223
TnCclTSuCtrC
PINTVAL,111
BACnet object R/RW
CclDevMod
MVAL,156
5
Cooling
R/RW Note
R °C
RW %
RW
R/RW Note
RW % / K
RW s
Note
1: Off
2: Control Mode
3: Full Open
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