Installation & Operation Manual - Model AVR6000
Contents of this Manual are Subject to Change Without Notification
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controller shall reset the discharge air temperature setpoint while modulating open
the supply air duct reheat control valve as required to maintain the room
temperature heating setpoint. The cooling control loop is set to zero.
Cooling:
If space temperature rises above the room temperature cooling setpoint,
the controller shall modulate open the GE/Return airflow valve as required to
achieve the room temperature cooling setpoint. The supply airflow control valve
shall track the total room exhaust to maintain negative room offset. The heating
control loop is set to zero so no reheat is introduced during cooling.
Deadband:
When the room temperature is between the heating and cooling
setpoints, the room temp heating and cooling control loops are set to zero and the
supply airflow volume is controlled to the value required to maintain the room
offset.
App 4 Control Logic: Supply with DTS Reheat Control, GE/Return and Multiple
Fume Hoods and/or other Specialized Exhaust (2-20 using AccuNet)
This App provides room temperature and airflow control for a room with a single
supply valve, a reheat system that includes a duct temperature sensor, a tracking
GE/Return valve and multiple fume hood and/or specialized exhaust valves. In this
application the fume hood and/or specialized exhaust leads the control sequence
and the supply tracks the total exhaust to maintain the room offset. The GE/Return
valve is used as required to satisfy the cooling demand and maintain the room offset
and the supply discharge temperature setpoint is controlled to satisfy the heating
demand. The room temperature measurement is provided by the Accutrol ARS1
room temperature sensor which is mounted on a wall inside of the controlled space.
Control of the discharge temperature setpoint using the DTS optimizes comfort in
the space while improving energy efficiency. The AVR6 AccuValve can be configured
to operate with multiple user-defined setpoint modes (i.e. occupied, unoccupied,
decontamination, override…) that are activated using BACnet or locally through two
dry contact inputs on the AVR controller.
