HEAT SETUP
The FBVI-2U4-4T has 3 Digital Outputs (DO) to control heat stages, one dedicated digital output for a
digital fan command, and 2 Analog Outputs (AO) to control modulating heat or fans. A tri-state heating
valve may be configured using DO-10 and DO-11.
The heatConfig (A4) analog setpoint will determine the stages of heat, heating priority, and if there is
perimeter heat available. Using the CXProHD BACnet commissioning, the configuration number will be
automatically calculated. If changing the values in the field, select each option, and add the numbers for
the final number to enter into the heatConfig (A4) analog setpoint.
Options to select are:
• 0 = No Heat (default)
• 1 = One stage of Heat
o Unit has one stage of heat.
• 2 = Two stages of Heat
o Unit has two stages of heat.
• 4 = Three stages of Heat
o Unit has three stages of heat.
• 16 = Is Duct heat or perimeter heat the priority
o If Duct heat is the priority, the stages of duct heat will be enabled before the stages of
Perimeter heat
o If Perimeter heat is the priority, the stages of perimeter heat will be enabled before the
stages of Duct heat.
• 32 = Operate both Duct heat and perimeter heat simultaneously
o When both duct and perimeter heat are available, this will enable both the first stages of
heat for both duct and perimeter heat at the same time.
• 64 = Use Dual Max Control
o When the unit has a discharge air temperature sensor configured, this will enable the dual
max heating sequence to be used for duct heating. See the control sequences section for
dual max heating control details.
If Perimeter Heat is available, set the number of stages of Perimeter heat using the
stagesOfPerimeterHeat (A75) analog setpoint.
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