Trane LO Air Conditioner User Manual


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2 UNT-IOM-6
Table of Contents
General Information3
Cabinet Styles4
Model Number Description6
Receiving and Handling9
Jobsite Storage10
Installation Considerations11
Service Access12
Installation Checklist13
Vertical Units15
Installing the Unit15
Horizontal Units16
External Insulating Require-
ments20
Startup Checklist20
Units with Hydronic Coil Connec-
tions Only21
Piping21
Units with Steam Coils22
Factory Piping Package Connec-
tions24
Installing the Auxiliary Drain
Pan25
Condensate Overflow Detection
Device26
Automatic Changeover Sensor26
Automatic Electric Heat Lockout
Switch (Fan-coil) 27
Ductwork Recommendations32
Duct Connections32
Supply Power Wiring33
Electrical Connections33
Wall Mounted Control Interconnec-
tion Wiring35
Electrical Grounding Restric-
tions35
Fan Mode Switch 36
Installation36
Installing Wall Mounted Con-
trols36
Zone Sensor Installation37
Fan Mode Switch39
Tracer® ZN.010 and ZN.51040
Thermostat Module Operating
Information41
Binary Inputs42
Binary Outputs43
Analog Inputs44
Fan Mode Switch44
Zone Sensors44
Supply Fan Operation45
LED Activity46
Troubleshooting46
Yellow COMM LED47
Manual Output Test48
Diagnostics50
Resetting Diagnostics51
Troubleshooting 53
Tracer® ZN.52059
Troubleshooting83
Troubleshooting85
Tracer® Communication Wiring
88
Service Communication Wiring
89
Wall-Mounted Zone Sensor
Module89
TUC Human Interface90
Cooling and Heating Operation92
TUC Sequence of Operation92
Fan Mode Operation93
Entering Water Temperature
Sampling Function94
2-Pipe with Auxiliary Electric Heat
(Fan-coils)94
Fresh Air Damper Options95
BIP4: Low Temperature Detection
Option97
BIP3: Condensate Overflow
Detection Device97
BIP4: Smoke Input98
BIP1: External Interlock98
BIP3: Occupied/Unoccupied
Mode98
BIP2: Motion Detection99
Autocycle Test99
Reading Diagnostics 101
Reading the Operating Machine
State 102
Reading the Operating Control
Mode104
Resetting Diagnostics107
Diagnostics107
Unit Mode Listed as Standby108
Troubleshooting 109
Maintenance Procedures116
Periodic Maintenance Check-
list116
Maintenance116
Inspecting and Cleaning Drain
Pans118
Winterizing the Coil 120
Inspecting and Cleaning Coils121
Inspecting and Cleaning the
Internal Insulation on Fan-
Coils123
Inspecting and Cleaning the
Fan124
Fan Board Assembly Removal126
Factory Piping Packages128
Appendix128
Typical Wiring Diagrams129-134
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