Orion System VCM Controller - Manual (Page 3)

VCM Controller
Technical Guide
3
Sequence Of Operations ............................................................................................................................... 37
Occupied/Unoccupied
Mode of Operation .................................................................................................................................................................... 37
HVAC Modes of Operation ....................................................................................................................................................... 37
Vent Mode Operation ................................................................................................................................................................ 37
Cooling Mode Operation ........................................................................................................................................................... 37
Dehumidification Mode ............................................................................................................................................................. 39
Remote Forced Dehumidification ............................................................................................................................................. 40
Return Air Bypass Damper Control .......................................................................................................................................... 40
Heating Mode Operation .......................................................................................................................................................... 40
Warm-up Mode Operation ........................................................................................................................................................ 42
Off Mode ................................................................................................................................................................................... 42
Remote Control of HVAC Mode ................................................................................................................................................ 42
Supply Air Temperature
Setpoint Reset .......................................................................................................................................................................... 42
Supply Fan Control ................................................................................................................................................................... 43
Duct Static Pressure Control .................................................................................................................................................... 43
Building Pressure Control ......................................................................................................................................................... 43
IAQ (CO2) Operation ................................................................................................................................................................ 44
Pre-heater Operation ................................................................................................................................................................ 44
Outdoor Air Lockouts ................................................................................................................................................................ 44
Supply Air Cutoffs ..................................................................................................................................................................... 44
Scheduling ................................................................................................................................................................................ 44
Internal Trend Logging .............................................................................................................................................................. 45
Force Modes or Overrides ........................................................................................................................................................ 45
VAV/Zone Box Compatibility ..................................................................................................................................................... 46
VAV/Zone System ..................................................................................................................................................................... 46
Zoning System .......................................................................................................................................................................... 46
Troubleshooting ............................................................................................................................................ 47
Using LEDs To Verify Operation ............................................................................................................................................... 47
Appendix ........................................................................................................................................................ 48
Diagnostic LEDs Operation ...................................................................................................................................................... 48
System Configuration Options .................................................................................................................................................. 49
10 kOhm Type III Temperature Sensor Testing ........................................................................................................................ 53
OE265 RH Sensor Testing ....................................................................................................................................................... 54
OE271 Pressure Sensor Testing .............................................................................................................................................. 55
OE258 Pressure Sensor Testing .............................................................................................................................................. 55
OE275 Suction Pressure Transducer Testing ........................................................................................................................... 56
Notes: ............................................................................................................................................................ 57