CaptiveAire RTULink, Installation, Operation And Maintenance Manual

Page: 27 / 56

27
Emer Heat Diff - Emergency heat differential is the temperature differential from the heating set point in degrees
Fahrenheit at which emergency heat will be activated. For example, if the tempering thermistor goes below this
set point, the RTULink will send an emergency heat signal on the “E” terminal.
Heat Diff Stg 2 - Second stage heating temperature differential is the number degrees Fahrenheit below the
heating set point that the tempering sensor must be to allow a call for the second stage of heating.
Heat Diff Stg 3 - Third stage heating temperature differential is the number degrees Fahrenheit below the heating
set point minus the Heat Diff Stg 2 that the tempering sensor must be to allow a call for the second stage of
heating.
Cool Diff Stg 2 - Second stage cooling temperature differential is the number degree(s) Fahrenheit above the
cooling set point that the tempering sensor must be to allow a call for the second stage of heating.
Cool Diff Stg 3 - Third stage cooling temperature differential is the number degree(s) Fahrenheit above the
cooling set point plus the Cool Diff Stg 2 that the tempering sensor must be to allow a call for the second stage of
heating.
Heat Hysteresis - Heat hysteresis is the number of degree(s) Fahrenheit the tempering stat is allowed to be
above the heating set point before the RTULink will stop a call for heating.
Cool Hysteresis - Cool hysteresis is the number of degree(s) Fahrenheit that the tempering stat is allowed to be
below the cooling set point before the RTULink will stop a call for cooling.
Min Heat On Tim(e) - Minimum heat on time is the time that the heating signal is required to be ON before it is
allowed to turn OFF. This timer is intended to reduce heater cycling and increase life cycle of the heating
components. The timer is in a MM:SS format and is adjustable from 00:00 to 20:00.
Min Cool On Tim(e) - Minimum cool on time is the time that the cooling signal is required to be ON before it is
allowed to turn OFF. This timer is intended to reduce condenser cycling and increase life cycle of the cooling
components. The timer is in a MM:SS format and is adjustable from 00:00 to 20:00.
Min Heat Off Tim - Minimum heat off time is the time that the heating signal is required to be OFF before it is
allowed to turn ON. This timer is intended to reduce heater cycling and increase life cycle of the heating
components. The timer is in a MM:SS format and is adjustable from 00:00 to 20:00.
Min Cool Off Tim - Minimum cool off time is the time that the cooling signal is required to be OFF before it is
allowed to turn ON. This timer is intended to reduce condenser cycling and increase life cycle of the cooling
components. The timer is in a MM:SS format and is adjustable from 00:00 to 20:00.
Set Point Limit - Setting to enable set point limit adjustments.
Sp Limit Adjust - Setting to adjust set point limit temperature.
Max X Stg RunTim - Maximum X stage runtime is the maximum time that a stage is allowed to run before the
RTULink calls for the next stage (if applicable). For example, if stage x has been running for the duration of this
timer, then force stage x+1, if the unit is equipped with a stage x+1. This timer applies to heating and cooling.
This timer is intended to increase efficiency by not allowing a unit to continuously run while not satisfying set
points. The timer is in a MM:SS format and is adjustable from 00:00 to 120:00. If this feature is not desired, set
the time to 00:00.
Occ Intlk Type
– When set to Passthrough, allows a hardware input (on the ALARM terminal of the stat side of
the RTULink) which will output a defrost signal to the RTU side. When set to Interlock, this will force the RTULink
into an occupied state in scheduling and forces the blower on.
Space Air Stat - If a space air stat is used, this option should be set to Yes.
Discharge Stat - If a discharge stat is used, this option should be set to Yes.
Return Air Stat - If a return air stat is used, this option should be set to Yes.
Outside Air Stat - If an outside air stat is used, this option should be set to Yes.
Mixed Air Stat - If a mixed air stat is used, this option should be set to Yes.