Zone
Zone
VCB-X CONFIGURATION
VCB-X Operator Interface SD
26
VCB-X Con
fi
guration Screens
Con
fi
guration Screen #3 - EM2 Expansion
Module Installed
VCBX Cnfg ID 101
EM2 Installed: NO
Use < Or > To Change
If you have expansion module EM2 installed, this con
fi
guration option
should be con
fi
gured as YES.
Default is NO.
If your unit utilizes the
following, an EM2 Module is required:
Remote SAT Reset
Remote Forced Cooling
Return Air Bypass Control
Remote Forced Heating
Remote Forced Dehumidi
fi
cation
Con
fi
guration Screen #4 - MHGRV-X &
MODGAS-X Installed
VCBX Cnfg ID 101
MHGRV Installed: NO
MODGS Installed: NO
Use < Or > To Change
If you have an MHGRV-X Controller installed, the
fi
rst con
fi
guration
option should be con
fi
gured as YES. If you have a MODGAS-X Con-
troller installed, the second con
fi
guration option should be con
fi
gured
as YES.
Defaults are NO.
Con
fi
guration Screen #5 - 12 Relay E-BUS
Expansion Module Installed
VCBX Cnfg ID 101
12RLY Installed: NO
Use < Or > To Change
If you have a 12 Relay E-BUS Expansion Module installed, this con-
fi
guration option should be con
fi
gured as YES.
Default is NO
.
Con
fi
guration Screen #6 - PREHEAT-X
Controller Installed
VCBX Cnfg ID 101
Preheat-X
Installed: NO
Use < Or > To Change
If you have a PREHEAT-X Controller installed, this con
fi
guration option
should be con
fi
gured as YES.
Default is NO
.
Con
fi
guration Screen #7 - HVAC Mode Enable
Source
VCBX Cnfg ID 101
HVAC Source
Single Zone VAV
Use < Or > To Change
This selection will determine which sensor will determine the mode of
operation of the unit and how it will operate. If selecting HVAC Source
Set by Remote Contact as YES in the next screen, you should select
Outdoor Air as the HVAC Source in this screen. If you will be using a
BACnet command to determine the HVAC mode, then you can leave
the selection on this screen at the default.
Default is Single Zone VAV
.
Available options are:
Single Zone VAV
—Recirculating unit using the Space
Temperature Sensor to determine the mode of operation.
Heating and Cooling are controlled to a Leaving Air
Setpoint. Space Temperature resets the Supply Fan VFD
speed to maintain the Space Temperature. Modulating
Heating and Cooling must be used for this operation.
Can be con
fi
gured for CAV Heating using staged Heat.
Space Temperature
—Typical recirculating unit using a
Space Temperature Sensor to determine the Heating,
Cooling, and Vent Modes of operation.
Outdoor Air
—This is for a 100% Outdoor Air Unit
(MUA) using the Outdoor Air Temperature Sensor to
determine the Heating, Cooling, and Vent Modes of
operation. Dehumidi
fi
cation utilizes an Outdoor Air
Dewpoint Setpoint. Also use this con
fi
guration if the next
screen will be con
fi
gured for Modes Set By Remote
Contact.
Supply Air
—This is for a standard Cooling Only VAV
unit with optional Morning Warm Up. In the Occupied
Mode, the unit will be in the Cooling Mode controlling to
the Cooling Supply Air Setpoint.
Supply Air/Tempering
—This selection is for VAV
“cooling only” applications where because of cold outdoor
temperatures, heat may need to be added in order to
maintain the “Cooling” Supply Air Setpoint. This
application requires outdoor Cooling and Heating Setpoints
con
fi
gured using the Hood On Enable Setpoints, to initiate
Cooling and Heating Modes. The Heating Supply Air
Setpoint should be set at least 2
˚
F below the Cooling Supply
Air Setpoint. See the Sequence of Operations for details.
Return Air
—Optional recirculating unit con
fi
guration
using the Return Temperature Sensor to determine the
Heating, Cooling, and Vent Modes of operation.
Space Temperature with High % OA—
If it is
preferable to use Space conditions (instead of Outside Air)
to control a 100% or high percentage outdoor air unit, this
option allows tempering of the outdoor air in the Space Vent
Mode of operation to prevent dumping of hot or cold air
into the space. See the Sequence of Operations for details.
NOTE:
If this option is selected, the Economizer must be
set
to
Standard Economizer
.
