Analog Output; Guide Vane Calibration; Swift Restart; Cooling Tower Control - Carrier SmartVu Control Manual

For oil pressure, a value >= 18 psi within 40 seconds after oil pump is turn ON will indicate a
conf irmation of pressure (Oil Pres Test Passed=YES).
For Ref rigerant Pump, a value >=10 psi within 15 seconds after refrigerant pump is turn ON will indicate
a conf irmation of pressure.

5.19.2. Analog Output

When quick test is enabled, the following analog outputs can be enabled to be driven to the commanded
positions which input in the quick test table.
Head Pressure Valve, Diffuser Actuator, Oil EXV and chiller status output (Q_CHST)

5.19.3. Guide Vane Calibration

Guide vane position should be calibrated before startup chiller.
Guide vane calibration can be started by setting "Quick Test Enable" to Enable and "GV1 calibration
Enable" to Enable.
If the actuator type is digital, then
- The f ully closed guide vane feedback resistance will be in the range of 62.5 Ohms to 688 Ohms
- The f ully opened guide vane feedback resistance will be in the range of 6190 Ohms to 11496
Ohms
Else if the actuator type is analog, then
- The f ully closed guide vane feedback mA value will be in the range of 3mA to 5mA
- The f ully opened guide vane feedback mA value will be in the range of 19mA to 20.8mA
When chiller type is 19DV, guide vane 2 also need calibration, same as guide vane 1.
5.20.

Swift Restart

This f unction is designed for data center application, and it allows the chiller to be restarted swiftly to
meet the building load requirements.
To enable this function, the "auto restart option" and "Swfit Restart Option" points in CONF_OPT table
should be set to "ENABLE".
The water f low verification time, oil prelube time and other delays will be decreased accordingly. If the
control system and oil system are equipped UPS (uninterrupted power supply), the startup time will be
decreased accordingly.
5.21.

Cooling Tower Control

If "water pressure option" in CONF_OPT table is ENABLED, there will be another optional hydraulic
control I/O board in the Carrier® SmartVu
water pumps and cooling tower fans (high speed and low speed).
The cooling tower fans are controlled by the pressure difference between condenser and evaporator and
entering water temperature of condenser, the objective is to maintain the entering condenser water
temperature is the optimal range.
SRDC-UG-2-14-000
19 Series Carrier®
–
TM
SmartVu
Controls IOM
TM
control system to allow Carrier® SmartVu
REVISION DATE
2.3 Dec 4, 2020
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