The OAC-3000S is a modified version of the OAC-3000. The controller has a built-in real time clock (RTC) that allows a daily or weekend/weekday occupied unoccupied schedule to override or operate in the absence of the binary input.
OUTDOOR AIRFLOW CONTROLLERS
Modules for Systems without an Airside Economizer
Compensate for damper hysteresis, filter loading, wind, stack and fan speed variations
Provide continuous verification of intake flow rates
Demonstrate compliance with ASHRAE Standards 62.1, 90.1 and 189.1
Satisfy LEED prerequisites and document code compliance
Improve indoor air quality and thermal comfort
Compatible with GreenTrol IAT integrated thermal dispersion airflow/temperature sensors or approved BACnet MS/TP airflow measuring devices
24 VAC/DC or MS/TP BACnet binary input activates occupied mode operation
RTC occupied/unoccupied scheduler
Provide airflow setpoint control, CO2-DCV or population based-DCV during occupied mode
Accepts approved BACnet MS/TP CO2 sensors or occupancy counters when DCV is required
Clamp DCV airflow rates between minimum and maximum airflow limits
Supports unoccupied airflow setpoint control
Built-in notification alarms
Contact closure relay can be assigned to notification alarms or active control mode
MS/TP BACnet connection
The OAC-3000S can be provided with a single integrated IAT-DI duct probe, one or two integrated IAT-UI or IAT-US universal mount probes or an approved external BACnet MS/TP airflow measurement device.
The OAC-3000S interfaces with approved MS/TP BACnet CO2 sensors and occupancy counters when DCV is required.
The OAC-3000S modulates an MP-Bus damper actuator to maintain the outdoor airflow rate. The controller can be configured to operate solely on the schedule or use the schedule with the binary input trigger to activate occupied mode. The binary trigger is typically is provided by a thermostat or other analog or MS/TP BACnet binary output. The trigger can also be provided by the 24 VAC control signal used when a two-position actuator is provided for outdoor air control (replace the two-position actuator with an MP-bus actuator).
Advanced logic and airflow measurement improves traditional CO2-DCV when demand control ventilation is required. The OAC-3000S controller resets the outdoor airflow setpoint between user defined minimum and maximum airflow limits to maintain either a user defined fixed CO2 level or variable airflow setpoint based on the population using a built-in CO2/airflow counting algorithm or external occupancy counter.
The OAC-3000S interfaces with most MS/TP BACnet building automation systems and supports full read/write privileges as a BACnet 1/8 load master. An RS-485 signal isolator is available when an isolated MS/TP network is required.
Outdoor Air Control (OAC) Modes Supported
FLOW: Maintains a user defined airflow setpoint
CO2: Maintains a user defined CO2 level by resetting the outdoor airflow setpoint (requires a CO2 sensor)
CO2/OAF: Maintains a calculated outdoor airflow setpoint based on the estimated ventilation zone population (requires a CO2 sensor)
COUNT: Maintains a calculated outdoor airflow setpoint based on the occupancy counter population (requires an occupancy counter)
FIXED: Maintains a fixed damper position (no control)
Unoccupied Air Control (UAC) Mode Option: Yes, maintains a user defined airflow setpoint
“Unoccupied Mode” High/Low Airflow Alarm
“Minimum Outdoor Airflow Mode” High/Low Airflow Alarm
“All Modes” CO2 Alarm (requires a CO2 sensor)
“All Modes” System Trouble Alarm
Note: Alarms can be assigned to the contact closure relay
Built-in RTC Scheduler Modes:
Off: No schedule set
Days: Allows s different occupied start time and duration for each day of the week
weeks: Allows a different occupied start time and duration for weekdays and weekends
Display: 16-character alpha-numeric LCD
Navigation: 4-button interface
Integrated Sensor Capability
Type: Accepts GreenTrol IAT-DI, IAT-UI and IAT-US Thermal Dispersion Airflow and Temperature Measurement Probe (required unless an external MS/TP airflow measurement device is provided). See appropriate IAT product data sheet for probe information..
Available Configurations:IAT-DI Probes
Single Probe: 1 probe x 1 or 2 sensor nodes/probe
Available Configurations: IAT-UI and IAT-US Probes
Single Probe:Dual Probe: 1 probes x 2 sensor node/probe
Dual Probe: 2 probes x 1 sensor node/probe
Type: Binary Input (BI1)
Assignment: Mode activation trigger signal
Configurable Ranges: 0-24VAC or 0-24VDC
VAC configuration: 6.5 VAC
VAC configuration: 8 VDC
Assignment: MP-Bus proportional actuator network signal (requires MP-bus cable, sold separately)
Contact Closure Relay
Type: Dry contact w/ onboard jumper to drive a remote LED
Assignment: OAC alarms or Control Mode
Status: Normally Open (N.O.)
Rating: 30 VDC or 24 VAC @ 3 amp. max.
Type: Non-isolated MS/TP BACnet master connection (provide an RS-485 network isolator if isolation is required)
B.A.S. Object Read/Write Access: Yes
Device Load: 1/8 load
Supported Baud Rates: 9.6, 19.2, 38.4 and 76.8 kbaud
MS/TP BACnet Airflow Sensor Capability: One GreenTrol Automation or approved third-party airflow measurement device (cannot be used if an integrated airflow measurement device is connected).
MS/TP BACnet CO2 Sensor Capability: One GreenTrol Automation or approved third-party space mounted or return air CO2 sensor
MS/TP BACnet Occupancy Counter Capability: One to four GreenTrol Automation or approved third-party occupancy counterssensor
Environmental Limits, Power Requirements & Dimensions
Temperature: -20 to 120 ⁰F [-28.9 to 48.9 ⁰C]
Humidity: 5 to 95%
Important: Provide a weather-proof enclosure if the controller module is mounted outdoors
Power Requirement: 24 VAC (22.8 to 26.4 under load) @8.5V-A
Dimensions: 4.34H x 6.59W x 1.83D in. [110.2 x 167.3 x 46.6 mm]
156 Holly View Lane Loris, SC 29569 Toll Free 877 446 8765