Instruction manual
Page 18 of 32 OM 751
Priority Result
Application Override Input Unit Mode Override Input Unit Mode Output
Heat
Normal (Auto) Cool
Emergency Heat
Heat Heat
Normal (Auto) Cool Cool
Night Purge Night Purge
Off Off
Emergency Heat Emergency Heat
Fan Only Fan Only
Heat Don’t Care Heat
Cool Don’t Care Cool
Night Purge Don’t Care Night Purge
Off Don’t Care Off
Emergency Heat Don’t Care Emergency Heat
Fan Only Don’t Care Fan Only
Normal (Auto) is the normal UVC power-up state.
These are network variables.
Table 10. Normal UVC Mode Priority
Occupancy Modes
The UVC is provided with four occupancy modes: Occupied, Standby,
Unoccupied, and Bypass. The occupancy mode effects which heating
and cooling temperature setpoints will be used, effects IAF operation,
and effects OAD operation. The Manual Adjust Occupancy and
Networked Occupancy Sensor network variables, along with the
Unoccupied and Tenant Override binary inputs, are used to determine
the Effective Occupancy.
Priority Result
Emergency Override Remote Shutdown Energy Hold Energy Hold Unit Mode Actual UVC
Input Binary Input Off Input Off Output Output Action
Normal Normal
See the Normal
Normal
De-energized
UVC Mode Priority table
Energy Hold Off Energy Hold Off Off Off
Energized Don’t Care Energy Hold Off Off Off
Pressurize Don’t Care Don’t Care Don’t Care Off Pressurize
De-pressurize Don’t Care Don’t Care Don’t Care Off De-pressurize
Purge Don’t Care Don’t Care Don’t Care Off Purge
Shutdown Don’t Care Don’t Care Don’t Care Off Off
Normal here indicated the UVC power-up condition.
De-energized here means that the contacts connected to this binary input are open.
Energized here means that the contacts connected to this binary input are closed.
These are network variables.
Table 9. Special Purpose UVC Unit Mode Priority
Table 11. Occupancy Mode Priority
The tenant override switch (unit or wall sensor mounted) can be used here to force the UVC into the Bypass Mode.
Typical operation is defined in this row of the table.
These are network variables.
Priority Result
Occupancy Occupancy Unoccupied
Effective
Override Input Sensor Input Input Signal
Occupancy
Output
Occupied Don’t Care Don’t Care Occupied
Unoccupied Don’t Care Don’t Care Unoccupied
Occupied Don’t Care Occupied
Unoccupied Don’t Care Bypass
Bypass
Contacts Open (Occupied) Occupied
Null (default)
Contacts Closed (Unoccupied) Bypass
Standby Don’t Care Don’t Care Standby
Occupied Don’t Care Occupied
Unoccupied Don’t Care Unoccupied
Null (default)
Contacts Open (Occupied) Occupied
Null (default)
Contacts Closed (Unoccupied) Unoccupied