Quantech QWC3050T-200T User Manual

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QWC3050T-200T

WATER-COOLED LIQUID CHILLERS

STYLE A (60 HZ)

50 - 200 TONS

175KW THROUGH 700KW

INSTALLATION, OPERATION, MAINTENANCE

WATER-COOLED LIQUID CHILLERS

HERMETIC SCROLL

Supersedes: QWC3-NM1 (1118)

Form: QWC3-NM1 (1120)

PART # 035-26707-000

R410A

Issue Date:

November 20, 2020

Products are produced at a

f a c i l i t y wh o s e q u a l i t y -

management systems are

ISO9001 certified.

Default Chapter5
- Table of Contents5
Section 1 - General Chiller Information and Safety11
- Introduction11
- Safety11
- Warranty11
- Misuse of Equipment12
- FIGURE 1 - QWC3 Water Cooled Liquid Chiller13
- Condenser14
- Evaporator14
- Microprocessor Control Center14
- Refrigerant Circuit14
- Power Panel15
- Accessories and Options16
- Control / Power Panel Components18
Section 2 - Product Description13
- Compressors13
- Introduction13
- Refrigerant Circuits13
  - FIGURE 2 - Control / Panel Compowwnents18
  - Product Identification Number (Pin)22
- FIGURE 3 - Control Power Panel Components19
- Unit Components20
FIGURE 6 - Refrigerant Flow Diagram26
FIGURE 7 - Process and Instrumentation Diagram27
Section 3 - Transportation, Handling and Storage29
- Delivery and Storage29
- Inspection29
- Moving the Unit29
- Lifting Weights30
FIGURE 8 - Chiller Rigging and Lifting Weights30
Section 4 - Installation31
- Foundation31
- Installation Checklist31
- Location Requirements31
- Unit Isolation (Noise Sensitive Location)31
- Installation of Vibration Isolators32
- Pipework Connection32
- FIGURE 9 - ANSI/AWWA C-606 - Adapter Flanges34
- Option Flanges34
- Refrigerant Relief Valve Piping34
- Water Treatment34
- Condenser Cooling Liquid Systems35
- FIGURE 10 - Direct Pressure Control Diagram35
- Connection Types and Sizes36
- Pipework Arrangement36
- Pressure Tapping36
FIGURE 12 - Chilled Liquid System36
FIGURE 13 - Condenser Cooling Liquid System36
FIGURE 14 - Pipework Arrangements Legend36
FIGURE 15 - Cooler Connections36
FIGURE 16 - Control Wiring40
Section 5 - Technical Data41
- Operational Limitations41
- Condenser Pressure Drop Charts44
- FIGURE 25 - Power Circuit, 4 Compressor with Circuit Breaker71
- FIGURE 26 - Power Circuit, 5 and 6 Compressor72
- FIGURE 27 - Power Circuit, 6 Compressor73
- Connection Wiring Diagram74
Section 6 - Commissioning105
- Preparation - Power off105
- FIGURE 35 - EEV IB-G Interface Board106
- Preparation - Power on107
- Unit Operating Sequence111
Section 7 - Unit Controls113
- Introduction113
- Status Key115
- Status Key Messages120
- Display/Print Keys121
- TABLE 11 - Cooling Setpoints, Programmable Limits and Defaults132
- TABLE 12 - Program Key Limits and Default135
- TABLE 13 - Setpoints Quick Reference List136
- Unit Keys137
FIGURE 36 - Unit Keys Options Programming Quick Reference List143
Section 8 - Unit Operation145
- Capacity Control145
- Discharge Pressure Limit Controls145
- Leaving Chilled Liquid Control145
- Suction Pressure Limit Controls145
- Leaving Chilled Liquid Control Override to Reduce Cycling146
- Leaving Chilled Liquid System Lead/Lag and Compressor Sequencing146
- Return Chilled Liquid Control147
Section 9 - Service and Troubleshooting153
- Clearing History Buffers153
- Service Mode153
- Service Mode - Outputs153
- Inputs154
- Service Mode - Analog and Digital154
- Service Mode - Chiller Configuration154
- Control Inputs/Outputs155
- TABLE 18 - I/O Digital Inputs155
- Microboard Layout156
TABLE 26 - Troubleshooting163
Section 10 - Maintenance167
- Compressors167
- Important167
- On-Board Battery Back-Up167
- Operating Parameters167
- Overall Unit Inspection167
- Bacnet and Modbus Data Communications168
- FIGURE 41 - Micro Panel Connections169
- TABLE 27 - Values Required for Bas Communication169
- TABLE 28 - Real Time Error Numbers170
- TABLE 29 - BACNET and Modbus Communications Data Map171
- TABLE 30 - Yorktalk 2 Communications Data Map176
- Temperature Conversion Chart182
- Pressure Temperature Chart183
- R410-A183
- Temperature184
TABLE 31 - si Metric Conversion184

Questions and Answers:

T
Troy StewartAug 1, 2025
Why is it important to properly program soft start, refrigerant type, and expansion valve type on a Quantech QWC3050T-200T Chiller?
- K
  Krystal RyanAug 1, 2025
  It is important to properly program the soft start (disabled), refrigerant type (R410A), and expansion valve type (Thermostatic) to prevent damage to the compressors and other system components. Ensure proper programming of these parameters.