Trane LO User Manual
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