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Table of Contents
ii RTU Open
Wiring a status switch ......................................................................................................................... 31
Wiring specifications ................................................................................................................ 31
To wire a status switch to the controller ................................................................................. 32
Wiring a compressor safety ................................................................................................................ 32
Wiring specifications ................................................................................................................ 32
To wire a compressor safety input to the controller ............................................................... 33
Wiring an occupancy switch or door contact ..................................................................................... 33
Wiring specifications ................................................................................................................ 33
To wire an occupancy switch or door contact ......................................................................... 34
Start-up ....................................................................................................................................................................... 35
Service Test ......................................................................................................................................................... 36
Configuring the RTU Open's properties .......................................................................................................... 37
Unit Configuration properties ............................................................................................................. 37
Setpoint properties.............................................................................................................................. 39
Service Configuration properties ........................................................................................................ 40
Sequence of Operation ............................................................................................................................................. 42
Occupancy ........................................................................................................................................................... 42
Supply fan ........................................................................................................................................................... 43
Cooling ................................................................................................................................................................. 43
Economizer ......................................................................................................................................................... 44
Power Exhaust .................................................................................................................................................... 44
Unoccupied Free Cooling .................................................................................................................................. 45
Optimal Start ...................................................................................................................................................... 45
Enthalpy control ................................................................................................................................................. 46
Indoor Air CO2 .................................................................................................................................................... 46
Heating ................................................................................................................................................................ 47
Heat Pump operation ........................................................................................................................................ 48
Dehumidification ............................................................................................................................................... 48
Demand Limit ..................................................................................................................................................... 49
Door switch ......................................................................................................................................................... 49
Remote occupancy ............................................................................................................................................ 49
Fire Shutdown .................................................................................................................................................... 49
Compressor Safety ............................................................................................................................................ 49
Fan Status ........................................................................................................................................................... 50
Filter Status ........................................................................................................................................................ 50
Alarms ................................................................................................................................................................. 50
Linkage ................................................................................................................................................................ 53
Linkage Air Source Modes ................................................................................................................................ 54
Troubleshooting ......................................................................................................................................................... 55
Serial number ..................................................................................................................................................... 55
LED's .................................................................................................................................................................... 55
Replacing the RTU Open's battery .................................................................................................................. 56
Compliance ................................................................................................................................................................ 57
FCC Compliance ................................................................................................................................................. 57
CE Compliance ................................................................................................................................................... 57
BACnet Compliance........................................................................................................................................... 57
Appendix A: RTU Open Points/Properties .............................................................................................................. 58
Status................................................................................................................................................................... 58
Unit Configuration .............................................................................................................................................. 59
Setpoints ............................................................................................................................................................. 61
Alarm Configuration .......................................................................................................................................... 65
Service Configuration ........................................................................................................................................ 66
Maintenance ....................................................................................................................................................... 68
Alarms ................................................................................................................................................................. 70