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Trane
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RTAA-140
Trane RTAA-140 User Manual
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39
R
T
AA-IOM-3
R
T
AA-SA-2003A
Figure 20
Spring Isolator Placement for
T
ypical RT
AA Outdoor Unit with
Remote Evaporator Option
38
40
Table of Contents
Default Chapter
3
Table of Contents
3
General Information
9
Literature Change History
9
Unit Identification
9
Unit Inspection
9
Inspection Checklist
9
Loose Parts Inventory
9
Unit Description
10
Commonly Used Acronyms
10
Warnings and Cautions
20
Installation Responsibilities
20
Nameplates
21
Outdoor Unit Nameplate
21
Compressor Nameplate
21
Remote Evaporator Nameplate
21
Storage
23
Installation - Mechanical, Packaged
25
General
25
Pre-Installation
25
Location Requirements
25
Noise Considerations
25
Foundation
25
Clearances
25
Additional Location Requirements for Remote Evaporator Only
31
Drainage
31
Rigging
32
Lifting Procedures
32
Unit Isolation and Leveling
36
Evaporator Water Piping
36
Evaporator Piping
41
Evaporator Piping Components
42
Entering Chilled Water Piping
42
Leaving Chilled Water Piping
42
Evaporator Drain
42
Evaporator Flow Switch
42
Water Treatment
44
Water Pressure Gauges
44
Water Pressure Relief Valves
44
Freeze Protection
44
Domestic Water Heater Piping
45
Domestic Water Heater Piping Components
45
Entering Water Piping
45
Leaving Water Piping
45
Water Pressure Relief Valves
45
Freeze Protection
45
Installation - Mechanical Remote Evaporator Interconnecting Refrigerant Piping
47
General
47
Line Sizing
51
Equivalent Line Length
51
Liquid Line Sizing
51
Suction Line Sizing
53
Piping Installation Procedures
54
Refrigerant Sensors
54
Leak Test and Evacuation
56
Refrigerant and Additional Oil Charge
56
Refrigerant Charge Determination
56
Oil Charge Determination
56
Installation - Electrical
57
General Recommendations
57
Installer-Supplied Components
68
Remote Evaporator Only
68
Power Supply Wiring
68
General
68
Control Power Supply
68
Heat Tape Power Supply
68
(Packaged Units Only)
68
Water Pump Power Supply
68
Auxiliary Heat Tape Power Supply
68
Interconnecting Wiring
69
Chilled Water Pump Interlock
69
And External Auto/Stop
69
External Auto/Stop Wiring
69
Alarm/Running/Maximum Capacity Outputs
70
Alarm/Running/Maximum
70
Capacity Indicator Wiring
71
Low Voltage Wiring
71
Emergency Stop (Normal Trip)
71
External Circuit Lockout - Circuit #1
71
Ice Making Option
71
External Chilled Water Setpoint
72
Potentiometer, Voltage Source
73
VDC or Current Source 4-20 Ma
73
External Current Limit Setpoint (CLS) Remote Resistor/Potentiometer, Voltage Source
73
VDC or Current Source
73
Optional Bidirectional
74
Communication Link Connection Procedure
74
General
74
Installation Check List
75
Operating Principles - Mechanical
77
General
77
Refrigeration (Cooling) Cycle
77
Cycle Description
77
Compressor Description
77
Compressor Motor
77
Compressor Rotors
77
Compressor Loading Sequence
77
Oil System Operation
82
Overview
82
Domestic Water Heater
82
Oil Separator
83
Compressor Bearing Oil Supply
83
Compressor Rotor Oil Supply
83
Slide Valve Movement
84
Oil Filter
84
84 -Condenser Fans
84
Operating Principles - Adaptive Control Microprocessor Logic
87
General
87
Digital Display
87
Menus
93
Chiller Switch
99
Menu Function Descriptions and Selection
100
Selecting Variables and Options
100
Menu 0 - Operating Display
100
Menu 1 - Service #1 Display
100
Menu 2 - Service #2 Display
101
Menu 3 - Auxiliary Options
101
Menu 4 - Factory Display #1
102
Menu 5 - Factory Display #2
104
Number of Compressors
104
Compressor Tons
104
Fans Per Circuit
104
Reduced Inrush Starting - D/E D
104
Low Ambient - Half Air Flow Fan D/E D
104
D 5B Number of EXV Valves Per Circuit
104
Operational Features
105
Entering Evaporator Water Temperature
105
Current Limit Setpoint
105
Low Ambient Lockout
105
Electronic Expansion Valve (EXV) Test
105
Current Overload Protection
105
Leaving Chilled Water Temperature Control
105
Chilled Water Reset (CWR)
106
Leaving Water Temperature Cutout
107
Low Refrigerant Temperature Cutout
107
Low Ambient Temperature Start
107
Low Refrigerant Temperature Cutout Retry
107
Auto Lead/Lag
108
Phase Imbalance Protection
108
DIP Switch Settings
108
Compressor Overload DIP Switches
108
IPC Address
108
VDC/4-20 Ma Input for
108
Diagnostics and Troubleshooting
109
Rtaa-Iom-3
110
Pre-Start Checkout
121
General
121
Unit Voltage Power Supply
122
Unit Voltage Imbalance
122
Unit Voltage Phasing
123
Water System Flow Rates
124
Water System Pressure Drop
124
UCM Set-Up
124
Start-Up Procedures
125
General
125
System Superheat
125
System Subcooling
125
Unit Shutdown Procedures
129
Temporary Shutdown and Restart
129
Extended Shutdown Procedure
129
System Restart after Extended Shutdown
130
Periodic Maintenance
131
General
131
Refrigerant Emission Control
133
Weekly Maintenance
133
Monthly Maintenance
134
Annual Maintenance
134
General
135
Oil Separator Level Check
136
Water Treatment
136
Maintenance
135
Chemically Cleaning the Evaporator
135
Coil Cleaning
135
Domestic Water Heater - Tube Cleaning
135
4
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Trane RTAA-140 Specifications
General
Model
RTAA-140
Type
Air-Cooled Chiller
Cooling Capacity
140 Tons
Compressor Type
Helical Rotary
Refrigerant
R-134a
Power Supply
460V/3/60Hz
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