56
ACC-APG002A-EN
Emergency and Ventilation Override
Table 25. Emergency and ventilation override
Inputs Outputs
Emergency Override
BAS
EOM
Supply Fan
On/Off
Request
EOM
Supply Fan
Speed
Request
EOM
Compres-
sor Cool
Stage
Request
EOM
Compres-
sor Heat
Stage
Request
EOM
Auxiliary
Heat Stage
Request
Heat Cool
Mode
Status
Point State % Value Value Value Point
2 = EMERG_PRESSURIZE
ON 100 0 0 0
Fan Only
3 = EMERG_
DEPRESSURIZE
OFF 0 0 0 0
Fan Only
4 = EMERG_PURGE
ON 100 0 0 0
Fan Only
5 = EMERG_SHUTDOWN
OFF 0 0 0 0 OFF
6 = EMERG_FIRE
OFF 0 0 0 0 OFF
1 = EMERG_NORMAL
Auto Auto Auto Auto Auto Auto
Space Setpoint Adjustment
Zone sensors with an internal or external setpoint adjustment provide the controller with a local setpoint
(50 to 85°F or 10 to 29.4°C). The internal setpoint adjustment is concealed under the zone sensor cover.
To access the setpoint adjustment, remove the zone sensor cover. Some external setpoints (when
present) are displayed on the digital display zone sensor front cover. When the local setpoint adjustment
is used to determine the setpoints, all unit setpoints are calculated based on the local setpoint value, the
configured setpoints, and the active mode of the controller. The controller determines the effective
space setpoint based on the following:
• Local wired setpoint input
• Occupancy mode
• Heating or cooling mode (space demand)
• Space setpoint high and low limits (configured)
Single Setpoint
Heat mode:
• Occupied mode: Space Temperature Setpoint Active = Space Temperature Setpoint (arbitrated) -
Occupied Offset
• Occupied standby mode: Space Temperature Setpoint Active = Space Temperature Setpoint
(arbitrated) - Standby Offset
• Unoccupied mode: Space Temperature Setpoint Active = Unoccupied Heating Setpoint Cool mode
Cool mode:
• Occupied mode: Space Temperature Setpoint Active = Space Temperature Setpoint (arbitrated) +
Occupied Offset
• Occupied standby mode: Space Temperature Setpoint Active = Space Temperature Setpoint
(arbitrated) + Standby Offset
• Unoccupied mode: Space Temperature Setpoint Active = Unoccupied Cooling setpoint
When a building automation system or other controller communicates a setpoint to the controller, the
controller ignores the local setpoint input and uses the communicated value (default operation). The
exception is when the system is in unoccupied mode and the controller always uses the unoccupied
setpoints. After the controller completes all setpoint calculations, the calculated occupied setpoint is
validated against the following configured space setpoint limits:
• Heating setpoint high limit
Appendix A
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