Trane LO - Manual (Page 2)

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