VCB-X Operator Interface SD
VCB-X CONFIGURATION
29
Mod Heat Then Staged
—Fully modulating Heat as the
1
st
form of Heat and Stage(s) of Heat as the 2
nd
form of
Heat.
Mod Gas Heat Only
—Only Modulating Gas Heat
controlled by the AAON
®
MODGAS-X Controller.
Mod Gas Then Staged
—ModGas Heat as the 1
st
form
of Heat and Stage(s) of Heat as the 2
nd
form of Heat.
See the
VCB-X Controller Field Technical Guide
for a more detailed
description of these operations.
NOTE:
For Heat Pump Units, use
Con
fi
guration Screen #37 -
Auxiliary Heating
for con
fi
guration.
Con
fi
guration Screen #20 - Modulating Heat
Output Signal
VCBX Cnfg ID 101
Mod Heat Volt Output
Min Pos Volts: 0.0
Max Pos Volts: 10.0
Enter
a value between 0.0 and 10.0 VDC for the Modulating Heat mini-
mum and maximum output voltage. When performing reverse acting
heating, the minimum position volts will be the highest value.
Defaults
are 0 VDC Min and 10 VDC Max
.
Description
Minimum
Default
Maximum
Minimum Position Volts
0
0
10
Maximum Position Volts
0
10
10
Con
fi
guration Screen #21 - Cool Type
VCBX Cnfg ID 101
Cool Type
No Cooling
Use < Or > To Change
Default is No Cooling
. Available options are:
No Cooling
—The unit has no Cooling.
Staged Only
—On/Off Chilled Water or
fi
xed stage(s) DX
Cooling
only.
Mod Only
— Modulating Chilled Water or Digital Scroll
Compressors.
Mod Then Staged
— Digital Scroll Compressor(s) as the
1
st
form of Cooling and
fi
xed stage(s) of Cooling as the 2
nd
form of Cooling.
VCB-X Con
fi
guration Screens
Con
fi
guration Screen #22 - Digital Compressor
For Modulating Cooling
VCBX Cnfg ID 101
Digital Comp For
Mod Cool: NO
Use < Or > To Change
Select
YES if your HVAC unit is using a Digital Compressor. If Modulat-
ing Cooling is selected on the previous screen, this value will automati-
cally change to YES.
Default is NO.
Con
fi
guration Screen #23 - Modulating Cooling
Output Signal
VCBX Cnfg ID 101
Mod Cool Volt Output
Min Pos Volts: 0.0
Max Pos Volts: 10.0
Enter
a value between 0.0 and 10.0 VDC for the Modulating Cooling
minimum and maximum output voltage. When performing reverse act-
ing cooling, the minimum position volts will be the highest value. This
con
fi
guration only applies to Chilled Water applications.
Defaults are
0 VDC Min and 10 VDC Max
.
Description
Minimum
Default
Maximum
Minimum Position Volts
0
0
10
Maximum Position Volts
0
10
10
Con
fi
guration Screen #24 - Mechanical Heat/
Cool Alarm Delay
VCBX Cnfg ID 101
Mech Heat/Cool
Alarm Delay: 15 Min
Enter
a time delay between 0-240 minutes for a delay in the time that
it takes an alarm to be generated.
When Heating or Cooling Mode is
initiated and staging is activated, if the Supply Air Temperature does not
rise or fall 5°F within this time period, a Mechanical Heating or Cool-
ing failure alarm will be generated. The Alarm is for Status Reporting
only. The HVAC unit will continue to run. This alarm does not apply if
Modulating Cooling or Heating are con
fi
gured.
Default is 15 Minutes.
Description
Minimum
Default
Maximum
Mechanical Heat/Cool
Failure Alarm Delay
0 Min
15 Min
240 Min
