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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