Quantech QTC4 370 Manuals

Manuals and User Guides for Quantech QTC4 370. We have 1 Quantech QTC4 370 manual available for free PDF download: Installation Operation & Maintenance

Quantech QTC4 370 Installation Operation & Maintenance (200 pages)

Air-Cooled Screw Liquid Chillers with Variable Speed Drive

Brand: Quantech | Category: Chiller | Size: 6 MB

Read before Proceeding
2
Safety Symbols
2
Changeability of this Document
3
Revision Notes
3
Unit Nomenclature
5
Table of Contents
7
Section 1: General Chiller Information and Safety
13
Introduction
13
Warranty
13
Quality Assurance and Safety
14
Fluorinated Greenhouse Gases
14
Responsibility for Safety
14
About this Manual
14
Misuse of Equipment
14
Emergency Shutdown
16
Section 2: Product Description
17
General System Description
17
Figure 1 - QTC4 Air-Cooled Screw Liquid Chiller with Variable Speed Drive
17
Figure 2 - QTC4 Piping and Instrumentation Diagram
18
Table 1 - 035-24013-000 QTC4 Piping and Instrumentation Legend
20
Figure 3 - Chiller Control System
24
Semi-Hermetic Quantech Twin-Screw Compressors
25
Evaporator
25
Condenser
25
Refrigerant Circuit
25
Electrical
25
Building Automation System Capabilities
26
Microcomputer Control Center
26
Figure 4 - View of QTC4 Control Center User Interface
26
Accessories and Options
27
Fan Options
27
Condenser Coils
27
Controls Options
28
Building Automation System Interface
28
General Options
28
Vibration Isolation
29
Section 3: Rigging, Handling, and Storage
31
Lifting Weights
31
Delivery and Storage
31
Inspecting the Delivery
32
Moving the Chiller
32
Figure 5 - Lifting Lug
32
Figure 6 - Lifting Using Lugs
32
Lifting Using Shackles
33
Table 2 - Unit Rigging
33
Section 4: Installation
41
Location Requirements
41
Outdoor Installations
41
Location Clearances
41
Recommended Minimum Clearances
42
Figure 7 - Acceptable Minimum Clearances Around and between Units
42
Table 3 - Minimum Evaporator Tube Removal Clearance
42
Vibration Isolators
43
Shipping Braces
43
Chilled Liquid Piping
43
Evaporator Pressure Drop
44
Figure 8 - Two Pass Water Pressure Drop, Imperial Units
45
Figure 9 - Three Pass Water Pressure Drop, Imperial Units
45
Water Treatment
46
Pipework Arrangement
46
Minimum Water Volume
46
Leaving Water Temperature out of Range
46
Figure 10 - Pipework Arrangement
46
Figure 11 - Leaving Water Temperature out of Range Suggested Layout
46
Thermal Storage
47
Variable Primary Flow
47
Connection Types and Sizes
47
Evaporator Connections
47
Figure 12 - Suggested Layout for Applications with a Flow Rate Less than the Evaporator Minimum
47
Figure 13 - Suggested Layout for Applications with a Flow Rate Greater than the Evaporator Maximum
47
Table 4 - Evaporator Connections Dimensions
48
Refrigerant Relief Valve Piping
49
Electrical Connection
49
Power Wiring
49
Power Supply Wiring
50
115 VAC Control Supply Transformer
50
Control Wiring
50
Volts Free Contacts
50
System Inputs
50
Power Supply Wiring
53
Figure 14 - Single Point Power Wiring
53
Single Point Wiring
53
Voltage Utilization Range
53
Figure 15 - Dual Point Power Wiring
54
Dual Point Wiring
54
Customer Control Wiring
55
Figure 16 - Customer Control Connections
55
Figure 17 - Single Point Kit Connection
56
Thermal Dispersion Flow Switch Connections
57
Figure 18 - Thermal Dispersion Flow Switch Connections
57
Figure 19 - Reserved Customer Wiring Entry
58
Figure 20 - Water Box Heater Wiring Box
58
Table 5 - Electrical Lug Data
60
Section 5: Technical Data
71
Table 6 - Physical Data - Microchannel Coil
72
Table 7 - Physical Data - Round Tube Coil
76
Table 8 - Optional One-Pass Evaporator
78
Table 9 - Standard Two-Pass, Rear Inlet/Outlet Evaporator
82
Table 10 - Optional Three-Pass Rear Inlet/Front Outlet Evaporator
86
Figure 21 - QTC4 Dimensions
90
Table 11 - Isolator Selection and Mounting Locations
92
Elastomeric Isolator Installation
98
Elastomeric Isolator Specifications
99
One Inch Deflection Isolator Installation
100
One Inch Deflection Spring Isolator Specifications
101
Two Inch Deflection, Isolator Installation and Adjustment
102
Two Inch Deflection, Restrained Spring Isolator Specifications
103
Section 6: Commissioning
105
Preparation
105
Power Connections
106
Figure 22 - LED Indicator Buttons
106
Figure 23 - Flow Switch Set
107
Figure 24 - Flow below the Representation Range
107
Figure 25 - Flow Exceeds the Representation Range
107
First Time Startup
108
General Operation
109
Operating Controls
115
Figure 26 - Keyboard and Display
115
Unit Switch
115
Section 7: Operation
115
Anti-Recycle Timer
116
Basic Operating Sequence
117
Unit Warning
118
Unit Warning Operation
118
Low Battery Warning
118
Microboard (331-03478-XXX)
118
Power Supplies and Leds
118
Power Supply Test Points
119
Configuration Jumpers
119
Figure 27 - New 331-03478-XXX Microboard
120
Building Automation System (BAS) Communications
121
Using Communications Protocol
121
E-Link or SC-EQ Interface
122
Table 12 - Values Required for BAS Communication
123
Table 13 - Real Time Error Numbers for BAS, SC-EQ or E-Link Communications Card
124
SC-EQ or E-Link BAS Communications Card
125
Figure 28 - LON E-Link Gateway Option
125
Program Update
126
Data Logging
126
Table 13 - Flash Card Update Error XXXXX
126
Unit Safeties
128
System Safeties, Faults
129
Table 14 - Low Differential Oil Pressure Cutout
131
Table 15 - Discharge Pressure Load Limiting/Unloading
132
Table 16 - Suction Pressure Load Limiting/Unloading
132
Sensor Failure Cutout Fault
132
Table 17 - Start Inhibit Sensor Thresholds
133
Section 8: Micropanel
135
General Status Messages
135
Unit Data Key
138
System Data Keys 1 through 4
140
Table 18 - Sensor Min/Max Outputs
142
VSD Data Key
143
Table 19 - Compressor Motor Overload Settings
144
Operating Hours / Start Counter Key
145
History Key
146
Setpoints Key
153
Table 20 - Setpoint Limits
154
Program Key
155
Table 21 - Programmable Operating Parameters
157
Default Values
157
Options Key
158
Date/Time and Schedule Keys
161
Sound Limit Schedule
163
Manual Override Key
164
Print Key
165
Table 22 - Printout Types
165
System Switches Key
168
General Requirements
169
Section 9: Maintenance
169
Operating Conditions
169
Checking System for Leaks
170
Leak Testing
170
Figure 29 - Service Connections
170
System Pressure Test
170
Figure 32 - Leak Test Hold Times
171
System Evacuation
173
Vacuum Dehydration
173
Figure 30 - Evacuation of Chiller Operation
174
Table 23 - System Pressures
174
Dehydration
175
Figure 31 - Saturation Curve
175
Refrigerant Charging
177
Table 24 - R-134A Pressure to Saturated Temperature Conversion
177
Table 25 - R-513A Pressure to Saturated Temperature Conversion
178
Removing the Refrigerant Charge for Service
179
Checking and Trimming the Refrigerant Charge
180
Checking the Refrigerant Charge During Unit Shutdown
180
Draining the Glycol Liquid
180
Microchannel Coil Cleaning
180
Chilled Liquid System Maintenance
183
Table 26 - Cleaning Materials
183
Glycol Concentration
184
Maintenance Requirements for QTC4 Chillers
185
Table 27 - Troubleshooting Guide
186
R-134A Conversion Table - Pressure to Saturated Temperatures
189
Table 28 - R-134A Pressure to Saturated Temperature Conversion
189
R-513A Conversion Table - Pressure to Saturated Temperature
190
Table 29 - R-513A Refrigerant Pressure to Saturated Temperature
190
R-513A Conversion Table - Temperature to Equivalent Pressure
191
Table 30 - R-513A Refrigerant Temperature to Pressure
191
Table 31 - Temperature Input Voltage Sensor (Measured Signal to Shield at the Sensor)
192
Table 32 - Outside Air Temperature Sensor Input Voltage, Measured Signal to Shield at the Sensor
193
Table 33 - Pressure Transducer Output Voltage, Measured Signal to Return at the Transducer
194
Table 34 - Motor Temperature Sensor Resistance (Check at the Motor)
195
Section 10: Decommissioning, Dismantling, and Disposal
197
General
197
Table 34 - si Metric Conversion
198

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