CaptiveAire RTULink, Инструкция по установке, эксплуатации и обслуживанию

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RTULink MODES OF OPERATION
Read through the operation mode descriptions below to determine which one best fits the application. It is recommended
that all RTULinks at a site be configured for the same operational mode. Global scheduling abilities via CASLink will be
lost if RTULinks are set to different operational modes. Once a mode is configured on the RTULink, the configuration
menu will hide parameters that do not pertain to the current control mode. To get a full list of the settings that apply to a
control mode, view the FUNCTIONALITY section of this manual.
Full Control
Full control mode requires a tempering sensor to be configured and is the operational mode that allows the highest level
of remote control. RTULinks can be fully configured via the CASLink interface. This control mode allows access to all
features outlined in this document. Once configured and connected to CASLink, the RTULink will provide all the
information necessary to fine-tune RTU operation. This includes multi-block scheduling where soft starts can be utilized
and peak load energy usage can be reduced. This is the recommended method of control due to the ability to customize
HVAC operation to building and climate parameters.
Note: When this control mode is configured, an external
thermostat is no longer used for RTU control.
Monitor Only
Monitor only mode allows no control from the CASLink website. The RTULink board passes through all commands it
receives from a thermostat. This mode is utilized when RTUs will be controlled with an external thermostat at all times.
RTU temperatures and signal status’ can still be monitored through CASLink. CASLink will issue alerts or faults to
indicate improper unit operation but no action will be taken to correct the fault. An external thermostat is required in order
to operate in this control mode.
External Mode
External mode is a hybrid control mode. It offers the ability to control an RTU with a thermostat while impeding or
interrupting signals only when the thermostat is calling for an operation that is not energy efficient or is not desirable for
the equipment or the building. There are two sub-modes of external control mode:
•
Without a Tempering Sensor
External mode without a tempering sensor connected allows the RTULink to apply logic that does not rely on a
known space temperature. This logic includes things such as minimum on and off timers, minimum damper
position, occupancy schedule, etc. CASLink will issue alerts or faults to indicate improper unit operation and will
only take corrective action if the operation is deemed not desirable or energy inefficient. An example of this would
be preventing compressor cycling. Another example would be forcing the blower to an ON state when the
building is occupied via a CASLink occupancy schedule.
•
With a Tempering Sensor
External mode with a tempering sensor connected allows the RTULink to apply more logic than when a tempering
sensor is not present. This logic includes, high and low space temperature limit thresholds, emergency heat
differentials, economizer operation, etc. CASLink User Interface (UI) will allow thermostat overrides (temporary
override of heat and cool set points) and will issue alerts or faults to indicate improper unit operation. This is to
prevent a malfunctioning thermostat from impeding operations. An example of this additional logic would be if the
space temperature is above a user-defined threshold and the RTU is still heating, disable unit heating until the
space temperature drops below the threshold.
Emergency Heat
The emergency heat mode will operate if the RTU utilizes an emergency heat function.