Name: Quantech QTC4 STYLE A Series
Brand: Quantech
Rating: 5 (1 reviews)

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AIR-COOLED SCREW

LIQUID CHILLERS

INSTALLATION, OPERATION, MAINTENANCE

Supersedes: QTC4-NM1 (318) Form QTC4-NM1 (418)

HFC-134A

LD18970

150 - 500 TONS

525 - 1750 KW

2 COMPRESSOR

60 HZ

MODEL QTC4 STYLE A

AIR-COOLED SCREW LIQUID CHILLERS WITH

VARIABLE SPEED DRIVE

035-24497-000

Issue Date:

April 2, 2018

Default Chapter5
- Table of Contents5
Section 1 - General Chiller Information and Safety11
- Introduction11
- Warranty11
- Quality Assurance and Safety11
- Fluorinated Greenhouse Gases12
- Responsibility for Safety12
- About this Manual12
- Misuse of Equipment12
FIGURE 1 - QTC4 Air-Cooled Screw Liquid Chiller with Variable Speed Drive15
Section 2 - Product Description15
- General System Description15
- Condenser17
- Electrical17
- Evaporator17
- Refrigerant Circuit17
- Semi-Hermetic Quantech Twin-Screw Compressors17
- Building Automation System Capabilities18
- Microcomputer Control Center18
  - Display Data18
  - Programmable Setpoints18
Section 3 - Rigging, Handling and Storage23
- Lifting Weights23
- Delivery and Storage23
- Inspection23
- Moving the Chiller24
- Unit Removal from Shipping Container24
- Lifting Using Shackles24
- Lifting Using Lugs24
FIGURE 4 - Lift Lug to Remove Unit from Shipping Container24
FIGURE 5 - Accessory Lifting Lugs24
TABLE 1 - Unit Rigging26
Section 4 - Installation35
- Location Clearances35
  - Recommended Minimum Clearances36
- Location Requirements35
- Outdoor Installations35
- Chilled Liquid Piping37
  - General Requirements37
- Shipping Braces37
- Vibration Isolators37
- Variable Primary Flow40
- Electrical Connection41
- Option Flanges41
FIGURE 15 - Customer Control Connections46
TABLE 4 - Electrical Lug Data47
Section 5 - Technical Data57
- TABLE 5 - Physical Data - Microchannel Coil58
- TABLE 6 - Physical Data - Round Tube Coil62
- TABLE 7 - Optional One-Pass Evaporator64
- TABLE 8 - Standard Two-Pass, Rear Inlet/Outlet Evaporator68
- TABLE 9 - Optional Three-Pass Rear Inlet/Front Outlet Evaporator72
- FIGURE 16 - QTC4 Dimensions76
- TABLE 10 - Isolator Selection and Mounting Locations78
- Elastomeric Isolator Installation84
- Elastomeric Isolator Specifications85
- One Inch Deflection Isolator Installation86
- One Inch Deflection Spring Isolator Specifications87
- Two Inch Deflection Isolator Installation and Adjustment88
- Two Inch Deflection, Restrained Spring Isolator Specifications89
Section 6 - Commissioning91
- Preparation91
- First Time Start up93
- FIGURE 17 - Keyboard and Display95
- Anti-Recycle Timer96
- Display96
- Evaporator Heater Control96
- Evaporator Pump Control96
- Keypad Data Entry Mode96
- Alarms97
- Basic Operating Sequence97
  - Start Sequence and Loading97
- Chiller Run Contact97
- Flow Switch Control97
- Remote Run / Stop97
- Unit Warning97
  - Unit Warning Operation97
  - Low Battery Warning97
- Microboard (331-03478-XXX)98
Section 7 - Operation95
- Operating Controls95
  - Unit Switch95
  - Keypad95
- FIGURE 18 - New 331-03478-XXX Microboard99
- Building Automation System (BAS) Communications100
  - Using Communications Protocol100
- Communication Ports100
- E-Link or SC-EQ Interface101
- FIGURE 19 - Control Board Connections for BAS Communications103
- SC-EQ or E-Link BAS Communications Card103
TABLE 20 - Start Inhibit Sensor Thresholds114
Section 8 - Micropanel115
- Unit Data Key118
- System Data Keys 1 through 4120
  - TABLE 21 - Sensor Min/Max Outputs122
  - Program Key134
- VSD Data Key123
- Operating Hours / Start Counter Key124
- History Key125
- Setpoints Key132
Section 9 - Maintenance149
- General Requirements149
- Refrigerant Removal, Evacuation and Charging a QTC4 Chiller150
- Microchannel Coil Cleaning151
  - Scheduled Maintenance151
- Maintenance Requirements for QTC4 Chillers152
TABLE 25 - Troubleshooting Guide153
TABLE 26 - Temperature Input Voltage Sensor (Measured Signal to Shield at the Sensor)156
TABLE 27 - Outside Air Temperature Sensor Input Voltage (Measured Signal to Shield at the Sensor)157
TABLE 28 - Pressure Transducer Output Voltage (Measured Signal to Return at the Transducer)158
TABLE 29 - Motor Temperature Sensor Resistance (Check at the Motor)159
Section 10 - Decommissioning, Dismantling and Disposal161
- General161
- Temperature162
TABLE 30 - si Metric Conversion162

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General

Brand	Quantech
Model	QTC4 STYLE A Series
Category	Chiller
Language	English

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