Orion System VCC-X Controller User Manual
Page 3
TABLE OF CONTENTS
3
VCC-X Controller Technical Guide
EM1 Expansion Module Input Wiring ..................................................................................................................... 40
Economizer Damper Actuator ........................................................................................................................... 40
EM1 Expansion Module Output Wiring .................................................................................................................. 41
Chilled Water .................................................................................................................................................... 42
Return Air Bypass ............................................................................................................................................. 43
E-BUS 12 Relay Expansion Module Wiring ........................................................................................................... 44
EBTRON
®
, GreenTrol™, and Paragon Air Flow Measurement Digital Transmitter ............................................... 45
MHGRV-X Controller .............................................................................................................................................. 46
MODGAS-X Controller ........................................................................................................................................... 47
PREHEAT-X Controller .......................................................................................................................................... 48
START-UP & COMMISSIONING ..................................................................................................... 49
Confi guring the Controller ...................................................................................................................................... 49
INPUTS & OUTPUTS ..................................................................................................................... 50
SEQUENCE OF OPERATIONS ........................................................................................................ 55
Supply Fan Operation Mode .................................................................................................................................. 55
Occupied / Unoccupied Mode ................................................................................................................................ 55
HVAC Modes of Operation ..................................................................................................................................... 56
Cooling ............................................................................................................................................................ 56
Economizer Operation ...................................................................................................................................... 57
Dehumidifi cation ............................................................................................................................................... 57
Heating ............................................................................................................................................................ 59
Ventilation ........................................................................................................................................................ 59
Off Mode ........................................................................................................................................................... 59
Remote Contact Control ........................................................................................................................................ 59
Space Sensor Operation ........................................................................................................................................ 60
IAQ (CO
2
) Control Operation ................................................................................................................................. 60
Morning Warm-Up / Cool-Down ............................................................................................................................. 60
Single Zone VAV .................................................................................................................................................... 61
Supply Air Temperature Setpoint Reset ................................................................................................................. 61
Airfl ow Monitoring .................................................................................................................................................. 62
Pre-Heater ............................................................................................................................................................. 62
Low Ambient Operation .......................................................................................................................................... 62
Heat Wheel Operation ........................................................................................................................................... 62
Duct Static Pressure Control .................................................................................................................................. 62
Duct Static Pressure Control For Filter Loading .................................................................................................... 63
Building Pressure Control ...................................................................................................................................... 63
MUA Operation ...................................................................................................................................................... 63
CAV/MUA Dual Mode (Hood On/Off Operation) .................................................................................................... 64
Space Temperature Control of High Percentage Outside Air Units ....................................................................... 64
Expansion Valve (EXV) Operations ....................................................................................................................... 64
Head Pressure Control .......................................................................................................................................... 65
Temperature Protection .......................................................................................................................................... 65
Outdoor Air Lockouts ............................................................................................................................................. 66
System Broadcasts ................................................................................................................................................ 66
Alarm Detection and Reporting .............................................................................................................................. 66
Sensor Failure Alarms ............................................................................................................................................ 67
Mechanical Failure Alarms ..................................................................................................................................... 67
Failure Mode Alarms .............................................................................................................................................. 68
Title 24 Economizer Alarms ................................................................................................................................... 68
VAV/Zone Controller Alarms ................................................................................................................................... 69
Relay Outputs ........................................................................................................................................................ 69
Trend Logging ........................................................................................................................................................ 69