Table Of Contents - Trane RTAA-70 Installation & Maintenance Manual

Table of Contents

Table Of Contents3
General Information5
Unit Identification - Nameplates5
Standatd Unit Nameplate5
Pump Package Unit Nameplate5
Unit Inspection6
Inspection Checklist6
Loose Parts Inventory6
Unit Description7
General Rtaa Mechanical Specifications8
Model Number Coding System9
Installation — Mechanical10
Installation Responsibilities10
Storage10
Location Requirements10
Foundation11
Rtaa Rigging And Lifting Weights – Packaged Unit12
Rtaa Rigging And Lifting Weights – Remote Evaporator13
Rtaa Rigging And Lifting Weights –Pump Package Aluminum Fins14
Rtaa Rigging And Lifting Weights –Pump Package Copper Fins15
Clearances16
Additional Location Requirements For Remote Evaporator Only16
Rigging16
Lifting Procedure17
Dimensions And Clearances For Rtaa Packaged Unit 70 – 125 Tons18
Remote Evaporator Dimensions, Rtaa 70 – 125 Tons20
Remote Evaporator Dimensions, Rtaa 110 – 125 Tons21
Unit Isolation23
Direct Mounting23
Neoprene Isolators23
Unit Leveling23
Water Piping23
Isolator Placement For Typical Rtaa Packaged Unit 70 – 125 Tons24
Isolator Placement For Rtaa With Remote Evaporator25
Evaporator Water Piping26
Evaporator Piping Components27
Entering Chilled Water Piping27
Leaving Chilled Water Piping Air Vents (To Bleed Air From System)27
Suggested Piping For Typical Rtaa Evaporator27
Evaporator Drain28
Chilled Water Flow Switch28
Water Treatment29
Customer Note29
Water Pressure Gauges29
Rtaa Evaporator Water Pressure Drop29
Water Pressure Relief Valves30
Freeze Protection30
System Configuration And Interconnecting Refrigerant Piping31
Installation - Remote Evaporator31
Remote Evaporator Installation32
Refrigerant Circuit Identification34
Rtaa Circuit Capacities (Nominal Tons)35
Equivalent Lengths Of Non-Ferrous Valves And Fittings (Feet)35
Liquid Line Sizes36
Line Sizing38
Liquid Line Sizing Steps38
Additional Suction Accumulator Line39
Example Liquid Line Sizing39
Suction Line Sizing Steps40
Liquid Line Sizing Example40
Example Suction Line Sizing41
Suction Accumulator Sizing42
Top View43
Side View43
Piping Installation Procedures44
Refrigerant Sensors44
Refrigerant Sensor Mounting And Wiring45
Leak Test And Evacuation46
Refrigerant And Additional Oil Charge46
Refrigerant Charge Determination46
System Refrigerant Charge46
Oil Charge Determination47
Example: Refrigerant Charge Computation47
Field-Installed Piping Charge47
Relief Valve Venting47
General Recommendations49
Installation - Electrical49
Electrical Data50
Electrical Data - Pump Package Option51
Installer-Supplied Components51
Power Supply Wiring52
Control Power Supply52
Water Pump Power Supply52
Interlock Wiring52
Installation — Electrical53
Typical Rtaa Chiller Interlock53
Alarm/Running/Maximum Capacity Outputs54
Alarm/Running/Maximum Capacity Relay Output Configurations54
Alarm/Running/Maximum Capacity Indicator Wiring54
Alarm/Running/Maximum Capacity Contact Outputs55
Alarm/Running/Maximum Capacity Menu Settings55
Low Voltage Wiring56
Emergency Stop (Normal Trip)56
External Circuit Lockout56
Ice Making Option56
External Chilled Water Setpoint (Cws)57
Resistor And Potentiometer57
Input Values Vs. External Chilled Water Setpoint58
External Current Limit Setpoint (Cls)59
Input Values Vs. External Current Limit Setpoint60
2-10 Vdc Voltage Source Input60
4-20 Ma Current Source Input60
Optional Bidirectional Communications Link (Bcl)60
Communication Link Connection Procedure61
Lontalk Communication Interface (Lci-C)61
Remote Clear Language Display Installation Procedure62
Remote Cld Mounting62
Remote Cld Panel Wiring63
Remote Cld Panel Mounting Holes And Electrical Access Knockouts63
Ics Address Setting64
Multiple Unit Operation64
Refrigeration (Cooling) Cycle66
Cycle Description66
Operating Principles66
Rtaa Refrigeration System And Control Components67
Compressor Description67
Compressor Motor67
Compressor Rotors68
Rtaa Refrigerant And Oil Diagram68
Compressor Loading Sequence69
Oil System Operation69
Oil Separator69
Compressor Bearing Oil Supply70
Compressor Rotor Oil Supply70
Female Unloader Valve70
Oil Filter70
Fan State At Circuit Startup71
Controls Interface72
Clear Language Display Keypad Overview72
Select Report Group73
Operator Interface Adaptive Control73
Select Settings Group74
Passwords74
Select Report Group And Select Settings Group Flowcharts74
Auto/Stop Keys75
Power Up75
Diagnostics93
Operational Features94
Entering Evaporator Water Temperature94
Current Limit Setpoint94
Low Ambient Lockout94
Current Overload Protection95
Leaving Chilled Water Temperature Control95
Chilled Water Reset (Cwr)95
Leaving Water Temperature Cutout97
Low Refrigerant Temperature Cutout97
Leaving Fluid Temperature Setpoints98
Low Ambient Temperature Start98
Low Refrigerant Temperature Cutout And Low Pressure Cutout Retry99
Balanced Compressor Starts And Hours99
Phase Imbalance Protection99
Reverse Rotation Protection100
Oil Failure Protection100
Dip Switch Settings100
Ipc Address100
Compressor Overload Dip Switch Settings101
Mechanical Control Settings102
Remote Cld Operation102
Communication Failure102
Pre-Start Checkout103
Unit Voltage Power Supply105
Unit Voltage Imbalance105
Unit Voltage Phasing106
Water System Flow Rates107
Water System Pressure Drop107
Clear Language Display Set-Up107
Start-Up Procedures108
Unit Sequence Of Operation110
System Superheat111
System Subcooling111
Temporary Shutdown And Restart112
Unit Shutdown Procedures112
Extended Shutdown Procedure112
System Restart After Extended Shutdown113
Periodic Maintenance115
Weekly Maintenance115
Monthly Maintenance115
Annual Maintenance116
Rtaa Operator's Log117
Rtaa Log118
Coil Cleaning119
Chemical Cleaning Configuration119
Maintenance119
Chemically Cleaning The Evaporator120
Oil Separator Level Check120
Oil Filter Change121
System Oil Level Specifications121
35 & 40 Ton Compressor Oil Filter Replacement Chart124
50 & 60 Ton Compressor Oil Filter Replacement Chart124
Refrigerant Charging And Recovery125
Low Side Repairs125
High Side Repair126
Adding Refrigerant126
Diagnostic Types (And Action)127
Diagnostic Codes127
Pump Package135
Temporary Storage135
Piping135
Water Storage135
Pre-Start Review And Inspection135
Control Panel Features And Options136
Connection Power136
Pump Checkout Procedure137
Control Panel Checkout137
System Start-Up138
C - Pump Curves Before Impeller Trim139
D - Pump Curves Before Impeller Trim139
E - Pump Curves Before Impeller Trim140
F - Pump Curves Before Impeller Trim140
Planned Shutdown141
G - Pump Curves Before Impeller Trim141
Pump Package Troubleshooting142
Pump Package Piping Schematic143
Unit Wiring145
Unit Electrical Data145