Carrier AquaEdge 19XR

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Fig. 64 — 19XR2-E Chiller Control Schematic (cont)

FROM DRAWING 19XR05044701 REV H

TO 4IOB

24 VAC

TO 4IOB

24 VAC

TO 4TB

Main Page

Table of Contents1
Safety Considerations2
Introduction4
Abbreviations and Explanations4
Chiller Familiarization (Fig. 1-5)4
Chiller Information Nameplate4
System Components4
Cooler4
Condenser4
Motor-Compressor4
Control Panel4
Power Panel (19XR2-E)5
Power Panel (19XR6/7)5
Economizer (if Available)5
Free-Standing/Factory-Mounted Starter or VFD5
Storage Vessel (Optional)5
Refrigeration Cycle11
Motor and Oil Cooling Cycle12
VFD Cooling Cycle12
Lubrication Cycle13
Summary13
Details13
Bearings13
Oil Reclaim System13
Starting Equipment16
Unit-Mounted Vfds16
Unit-Mounted Starters16
Solid-State Starter16
Wye-Delta Starter16
Free-Standing Starters/Vfds17
Controls17
Definitions17
General17
PIC 6 System Components17
Start-Up/Shutdown19
Recycle Sequence19
Local Start/Stop Control19
Lubrication Control20
Shutdown20
Before Initial Start-Up20
Job Data Required20
Equipment Required20
Remove Shipping Packaging20
Open Oil Circuit Valves20
Tighten All Gasketed Joints21
Check Chiller Tightness21
Refrigerant Tracer23
Leak Test Chiller23
Standing Vacuum Test23
Chiller Dehydration25
Inspect Water Piping25
Check Relief Valves25
Check the Optional Pumpout Compressor Water25
Piping25
Identify and Check Starter/Vfd25
Mechanical Starter26
Benshaw Redistart MX3 Solid-State Starter26
VFD Starter26
Verify Condition of Installation26
Inspect Wiring26
Carrier Comfort Network ® (CCN) and Local Equipment Network (LEN) Interface27
Check Starter27
Oil Charge28
Power up Controls and Check Oil Heater28
Software Configuration28
Input the Design Set Points28
Input the Local Occupied Schedule28
Input Service Configurations29
Field Set up and Verification31
Perform a Controls Test (Quick Test/Quick Calibration)34
Check Optional Pumpout System Controls and Compressor34
Charge Refrigerant into Chiller34
Initial Start-Up37
Preparation37
Check Motor Rotation37
Check Oil Pressure and Compressor Stop37
To Prevent Accidental Start-Up37
Check Chiller Operating Condition37
Instruct the Customer Operator37
Operating Instructions38
Operator Duties38
Prepare the Chiller for Start-Up38
To Start the Chiller38
Check the Running System38
To Stop the Chiller38
After Limited Shutdown38
Preparation for Extended Shutdown38
After Extended Shutdown39
Cold Weather Operation39
Manual Guide Vane Operation39
Refrigeration Log39
Pumpout and Refrigerant Transfer Procedures39
Preparation39
Operating the Optional Pumpout Unit (Fig. 37)41
General Maintenance44
Refrigerant Properties44
Adding Refrigerant44
Adjusting the Refrigerant Charge44
Refrigerant Leak Testing44
Leak Rate44
Test after Service, Repair, or Major Leak44
Repair the Leak, Retest, and Apply Standing Vacuum Test44
Checking Guide Vanes44
Trim Refrigerant Charge44
Weekly Maintenance47
Check the Lubrication System47
Scheduled Maintenance47
Service Ontime47
Inspect the Control Panel47
Changing Oil Filter47
Oil Specification47
Oil Changes47
Refrigerant Filter47
VFD Refrigerant Strainer (if Equipped)48
Oil Reclaim Filter48
Inspect Refrigerant Float System48
Inspect Relief Valves and Piping49
Compressor Bearing and Gear Maintenance49
Inspect the Heat Exchanger Tubes and49
Flow Devices49
Water Leaks49
Water Treatment49
Inspect the Starting Equipment or VFD50
Recalibrate Pressure Transducers50
Optional Pumpout System Maintenance50
Ordering Replacement Chiller Parts50
Troubleshooting Guide51
Overview51
Checking Display Messages51
Checking Temperature Sensors51
Checking Pressure Transducers55
High Altitude Locations55
Quick Test55
Pumpdown/Lockout55
Physical Data55
Appendix A - Pic 6 Screen and Table Structure109
Appendix B - Ccn Communication Wiring for Multiple Chillers (Typical)111
Appendix C - Maintenance Summary112
And Log Sheets112
Index115
Initial Start-Up Checklist117
Centrifugal Liquid Chiller117

Carrier AquaEdge 19XR - Page 98

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