Orion System SA Controller - Manual (Page 3)

SA Controller Technical Guide 3
Table of Contents
INPUTS AND OUTPUTS
SA Controller Inputs and Outputs ..........................................................................................................................................36
SA Expansion Module Inputs and Outputs ............................................................................................................................37
SEQUENCE OF OPERATION .......................................................................................................... 38
Operation Modes ......................................................................................................................................................................38
Occupied/Unoccupied Mode of Operation .........................................................................................................................38
HVAC Modes of Operation ................................................................................................................................................38
Vent Mode Operation .........................................................................................................................................................38
Cooling Mode Operation ....................................................................................................................................................38
Stage Control Window .......................................................................................................................................................40
Modulating Cooling ............................................................................................................................................................40
DX Cooling .......................................................................................................................................................................40
Air Cooled Condenser Fan Operation ...............................................................................................................................41
Water Side Economizer Operation (Valves 1 & 2) .............................................................................................................41
Water Cooled Condenser (Valve 3) ...................................................................................................................................41
Chilled Water Cooling ........................................................................................................................................................41
External Cooling ................................................................................................................................................................41
Dehumidifi cation Mode ......................................................................................................................................................42
Coil Temperature Reset .....................................................................................................................................................42
Reheat Control ..................................................................................................................................................................43
Coil Temperature Offset .....................................................................................................................................................43
Heating Mode ...................................................................................................................................................................43
Stage Control Window .......................................................................................................................................................43
Hot Water or Modulating Steam Heating ...........................................................................................................................44
External Heat .....................................................................................................................................................................44
Air to Air Heat Pump Operation .........................................................................................................................................44
Water Source Heat Pump Operation .................................................................................................................................44
Morning Warm-Up Mode ...................................................................................................................................................44
Off Mode ............................................................................................................................................................................45
Supply Air Temperature Setpoint Reset .............................................................................................................................45
Supply Fan Control ............................................................................................................................................................45
Duct Static Pressure Control .............................................................................................................................................45
Pre-Heater Operation ........................................................................................................................................................46
Entering Air Lockouts .........................................................................................................................................................46
Supply Air Cutoffs ..............................................................................................................................................................47
SA Controller Alarms .........................................................................................................................................................48
VAV/Zone Controller Alarms ..............................................................................................................................................49
Scheduling .........................................................................................................................................................................50
Internal Trend Logging .......................................................................................................................................................50
Force Modes or Overrides .................................................................................................................................................51
VAV Terminal Unit Controller Compatibility ........................................................................................................................51
VAV/Zone System ..............................................................................................................................................................51
TROUBLESHOOTING ..................................................................................................................... 52
LED Diagnostics .......................................................................................................................................................................52
Diagnostic LED Operation .......................................................................................................................................................53
APPENDIX
System Confi gurations ............................................................................................................................................................54
Stand-Alone System Layout ..............................................................................................................................................55
Interconnected System Layout ..........................................................................................................................................56
Networked System Layout .................................................................................................................................................57
Temperature Sensor Testing ...................................................................................................................................................58
OE265 Series RH Sensor Testing .....................................................................................................................................59
OE271 Pressure Sensor Testing .......................................................................................................................................60
OE275-01 Suction Pressure Transducer Testing for R410A Refrigerant ...........................................................................61
INDEX ............................................................................................................................................ 62