Honeywell IAQPoint2 Guide De Démarrage Rapide page 39

IAQPoint2™
Configure\Configure Setpoints submenu
SetPoints
CO2 850 ppm
Hyst 50 ppm
Temp 68 F
rH 50 %
Max Temp 86 F
Min Temp 50 F
√
Setpoint submenus for up to six parameters can be selected from this menu�
Configure\Configure Setpoints\Set Gas Setpoint
The setpoint for CO or VOCs is changed at this screen� This affects the position of
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the white triangle indicator on the main screen� This value is reported over BACnet
and Modbus� It is compared to the actual gas readings and can be used to drive
the relay and the binary outputs in BACnet and Modbus� This screen will not be
visible in models containing neither the relay nor the fieldbus outputs�
Configure\Configure Setpoints\Hyst. Setpoint
The hysteresis range settings effectively serve as a damping feature� They
determine a system's sensitivity, controlling how often the the monitor activates the
HVAC system� A narrow hysteresis range would cause an HVAC system to react
to minor changes� If the range is extremely narrow, the HVAC equipment will cycle
excessively and, therefore, undergo unnecessary wear� A wide hysteresis range
would require large deviations from the setpoint before responding to changes
in the gas concentration� If the range is too wide, occupants will experience
discomfort before the HVAC system responds�
Hysteresis determines how quickly the digital outputs (relay or fieldbus)
respond to decreasing gas concentration� The digital output will activate when
the concentration is greater than the setpoint� It will de-activate when the
concentration is less than the setpoint minus the hysteresis� This sets a hysteresis
value�
The binary outputs (relay, BACnet, and Modbus) go false only when the gas
concentration drops below the setpoint less hysteresis� This screen will not be
visible in models containing neither the relay nor the fieldbus outputs�
Configure\Configure Setpoints\Set Temp Setpoint
The setpoint is the value at which the monitor will cause the building's HVAC
system to respond� Any number between 32 and 106°F (0-50°C) can be chosen at
this screen� The default setting is 68°F (20°C)� The temperature setpoint is reported
over BACnet and Modbus� This screen will not be displayed on analog models or
on models that lack the temperature sensor�
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