TEC Zoning Control System for Stand-Alone and BACnet® MS/TP ...
TEC Zoning Control System for Stand-Alone and BACnet® MS/TP ...
TEC Zoning Control System for Stand-Alone and BACnet® MS/TP ...
- No tags were found...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Table 5: <strong>System</strong> Mode Calculation with Five Voting Zones (Example 3)Heat ActionVotingZone 1VotingZone 2VotingZone 3Table 5 shows that the resulting heat <strong>and</strong> cool weight used by the rooftop controller<strong>for</strong> the five voting zones is different, meaning different heating <strong>and</strong> cooling actionbased on the configuration of the rooftop controller. The heating or cooling actiondelivered to the zones also depends on the heating <strong>and</strong> cooling lockout functions,which are based on the outside air temperature <strong>and</strong> the supply air temperature.Overrides <strong>and</strong> Zone <strong>Control</strong>ler User Interface LockoutsVotingZone 4Specific functions on each zone controller can be locked out by the local user. Thisinterface lockout prevents unauthorized inputs to the system, typically in publicareas or other areas where certain interface functions need to be prevented. Thelockout level is accessed via the Lockout parameter in the Installer ConfigurationMenu. Simply set the appropriate lockout level <strong>for</strong> each zone according to thesystem requirements. See Table 6 <strong>for</strong> details regarding the various lockout levels.Table 6: Lockout Level Function Details (Part 1 of 2)VotingZone 5Current Heat Dem<strong>and</strong> 100% 0% 50% 50% 0%Heat Weight Set 100% 100% 100% 50% 100%Resulting Heat Weight to Rooftop <strong>Control</strong>ler 100% 0% 50% 25% 0%Highest Resulting Heat Weight of Three Zones 100%Average of Three Highest Resulting Heat Weights 58.3%Average of Five Highest Resulting Heat Weights 35%Cool ActionVotingZone 1VotingZone 2VotingZone 3VotingZone 4VotingZone 5Current Cool Dem<strong>and</strong> 0% 100% 0% 0% 100%Cool Weight Set 100% 50% 50% 50% 75%Resulting Cool Weight to Rooftop <strong>Control</strong>ler 0% 50% 0% 0% 75%Highest Resulting Cool Weight of Three Zones 75%Average Cool Weight of Three Highest Zones 41.7%Average Cool Weight of Five Highest Zones 25FunctionAccess the local occupied setpoint using theUP/DOWN arrow keys.Press the local OVERRIDE key to comm<strong>and</strong> thelocal override function only. The local heating<strong>and</strong> cooling dem<strong>and</strong>s are not sent to the rooftopcontroller, <strong>and</strong> the central system does notrestart. This function is required only whenperimeter reheat is used, <strong>and</strong> it is restartedduring an override period.Pressing the OVERRIDE key allows an overrideonly <strong>for</strong> the zone where the subject zonecontroller resides.LockoutLevel 0LockoutLevel 1LockoutLevel 2LockoutLevel 3Yes Yes Yes NoNo Yes No No24<strong>TEC</strong> <strong>Zoning</strong> <strong>Control</strong> <strong>System</strong> <strong>for</strong> <strong>St<strong>and</strong></strong>-<strong>Alone</strong> <strong>and</strong> <strong>BACnet®</strong> <strong>MS</strong>/<strong>TP</strong> Networked ApplicationsTechnical Bulletin