TABLE OF CONTENTS
3
VCB-X Controller Field Technical Guide
EM2 Expansion Module Input and Output Wiring .................................................................................................. 47
Remote SAT Reset Signal ............................................................................................................................... 48
Remote Forced Cooling, Heating & Dehumidi
fi
cation ..................................................................................... 48
Return Air Bypass ............................................................................................................................................. 49
E-BUS 12 Relay Expansion Module Wiring ........................................................................................................... 50
EBTRON
®
, GreenTrol™, and Paragon Air Flow Measurement Digital Transmitter ............................................... 51
MHGRV-X Controller .............................................................................................................................................. 52
MODGAS-X Controller ........................................................................................................................................... 53
START-UP & COMMISSIONING ..................................................................................................... 54
Addressing, Baud Rate & Powering Up ................................................................................................................. 54
Programming the Controller ................................................................................................................................... 55
INPUTS & OUTPUTS ..................................................................................................................... 56
SEQUENCE OF OPERATIONS ........................................................................................................ 61
Supply Fan Operation Mode .................................................................................................................................. 61
Occupied / Unoccupied Mode ................................................................................................................................ 61
HVAC Modes of Operation ..................................................................................................................................... 62
Cooling ............................................................................................................................................................ 62
Economizer Operation ...................................................................................................................................... 63
Dehumidi
fi
cation ............................................................................................................................................... 63
Heating ............................................................................................................................................................ 65
Ventilation ........................................................................................................................................................ 65
Off Mode ........................................................................................................................................................... 65
Remote Contact Control ........................................................................................................................................ 66
Space Sensor Operation ........................................................................................................................................ 66
IAQ (CO
2
) Control Operation ................................................................................................................................. 66
Morning Warm-Up / Cool-Down ............................................................................................................................. 66
Single Zone VAV .................................................................................................................................................... 67
Supply Air Temperature Setpoint Reset ................................................................................................................. 67
Air
fl
ow Monitoring .................................................................................................................................................. 68
Pre-Heater ............................................................................................................................................................. 68
Low Ambient Operation .......................................................................................................................................... 68
Heat Wheel Operation ........................................................................................................................................... 68
Duct Static Pressure Control .................................................................................................................................. 68
Duct Static Pressure Control For Filter Loading .................................................................................................... 69
Building Pressure Control ...................................................................................................................................... 69
MUA Operation ...................................................................................................................................................... 69
CAV/MUA Dual Mode (Hood On/Off Operation) .................................................................................................... 70
Space Temperature Control of High Percentage Outside Air Units ....................................................................... 70
Air to Air Heat Pump Operation .............................................................................................................................. 71
Heat Pump Standard Defrost Operation ................................................................................................................ 71
Heat Pump Adaptive Defrost Operation ................................................................................................................. 71
Water Source Heat Pump Operation ..................................................................................................................... 72
Water Source Heat Pump Safety Monitoring ......................................................................................................... 73
Head Pressure Control .......................................................................................................................................... 74
Temperature Protection .......................................................................................................................................... 74
Outdoor Air Lockouts ............................................................................................................................................. 74
System Broadcasts ................................................................................................................................................ 74
