Trane Horizon OAB Series - Table of Contents

6 OAU-SVX005C-EN
Table of Contents
Model Number Descriptions . . . . . . . . . . . . . . 8
Horizon Outdoor Air Unit . . . . . . . . . . . . . . . 8
General Information . . . . . . . . . . . . . . . . . . . . 11
Overview of Manual . . . . . . . . . . . . . . . . . 11
Model Number Description . . . . . . . . . . . 11
Unit Nameplate . . . . . . . . . . . . . . . . . . . . 11
Compressor Nameplate . . . . . . . . . . . . . . 11
Unit Description . . . . . . . . . . . . . . . . . . . . 11
Indoor Fan Failure Input . . . . . . . . . . . . . 11
Low Pressure Control ReliaTel Control . 11
Refrigerant Circuits . . . . . . . . . . . . . . . . . 11
High Pressure Control ReliaTel Control . 11
Space Temperature / RH Sensor (Optional)
12
High Temperature Sensor . . . . . . . . . . . . 12
Outdoor Air Temperature and Relative Hu-
midity Sensor . . . . . . . . . . . . . . . . . . . . . . 12
Control Input (Occupied / Unoccupied) . 12
Hot Gas Reheat . . . . . . . . . . . . . . . . . . . . . 12
100 Percent Outdoor Air Hood with Damper
and Filters . . . . . . . . . . . . . . . . . . . . . . . . . 12
Through the Base Electrical with Disconnect
Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Hinged Access Doors . . . . . . . . . . . . . . . . 12
Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . 12
First Aid Measures . . . . . . . . . . . . . . . . . . 13
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Unit Clearances . . . . . . . . . . . . . . . . . . . . 13
Unit Clearances, Curb Dimensions, and Dimen-
sional Data
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Direct-Fired OAB Units . . . . . . . . . . . . . . . 14
Direct-Fired OAG Units . . . . . . . . . . . . . . 15
Unit Weight and Rigging . . . . . . . . . . . . . . . . 16
Unit Weight . . . . . . . . . . . . . . . . . . . . . . . . 16
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . 18
General Unit Requirements . . . . . . . . . . . 18
Main Electrical Power Requirements . . . 19
Condensate Drain Configuration . . . . . . 19
Filter Installation . . . . . . . . . . . . . . . . . . . . .19
Field Installed Power Wiring . . . . . . . . . . .20
Main Unit Power . . . . . . . . . . . . . . . . . . . . . .21
Standard Wiring . . . . . . . . . . . . . . . . . . . . .21
Voltage Imbalance . . . . . . . . . . . . . . . . . . .21
Electrical Phasing (Three-Phase Motors) .22
Compressor Crankcase Heaters . . . . . . . .23
Main Unit Display and ReliaTel Controls .23
Field-Installed Control Wiring . . . . . . . . . .23
Control Power Transformer . . . . . . . . . . .23
Controls Using 24 Vac . . . . . . . . . . . . . . . .24
Controls Using DC Analog Input/Output
(Standard Low Voltage Multiconductor Wire)
24
DC Conductors . . . . . . . . . . . . . . . . . . . . . . . .25
System Configuration and Pre-Start . . . . . . .26
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Direct Heating Startup . . . . . . . . . . . . . . . . .29
Direct Gas-Fired Heating Start-Up Procedure
30
Initiate . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Standby . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Normal Start-up Pre-purge . . . . . . . . . . . .33
Ignition Trials . . . . . . . . . . . . . . . . . . . . . . .33
Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Settings and Adjustments . . . . . . . . . . . . .34
Operation of the Direct Spark Ignition Control
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . .34
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Monthly Maintenance . . . . . . . . . . . . . . . . . .36
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Supply/Return Air Smoke Detector Mainte-
nance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Cooling Season . . . . . . . . . . . . . . . . . . . . .36
Heating Season . . . . . . . . . . . . . . . . . . . . .36
Condenser Coil Cleaning . . . . . . . . . . . . . .36
Direct-Fired Unit Maintenance Schedule . .38
Lubrication Requirements . . . . . . . . . . . . .39
Pillow Block Bearings . . . . . . . . . . . . . . . .40
Frequency of Lubrication . . . . . . . . . . . . . .40