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Outdoor Airflow Controller Modules for Systems without an Airside Economizer
The OAC-5000 has an additional analog input and analog output compared to the OAC-4000. As a result, the OAC-5000 can be used with analog CO2 sensors as well as approved BACnet MS/TP CO2 or occupancy counters. It also provides an airflow output signal, if desired.
Minimum Outdoor Air Control (MOAC) 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)
PASS: Passes the economizer controller output signal (no control)
Unoccupied Air Control (UAC) Mode Option: Yes, maintains a user defined airflow setpoint
Economizer Controller Fault Signal Output: Yes (ECO FAULT=ON)
Note: If an economizer controller fault signal is required, an actuator feedback signal must be connected to AI2 and an analog input for a CO2 sensor is not available. Use an approved BACnet MS/TP sensor if CO2 measurement is required
Notification Alarms
“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
Display: 16-character alpha-numeric LCD
Navigation: 4-button interface
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 IFT 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: 2 probes x 1 sensor node/probe
Dual Probe: 2 probes x 1 sensor node/probe
GP1
Type: Binary Input (BI1)
Assignment: Mode activation trigger signal
Configurable Ranges: 0-24VAC or 0-24VDC
Trigger Threshold:
VAC Configuration: 7 VAC
VAC Configuration: 3 VAC
AO1
Assignment: Airflow control signal
Configurable Ranges: 0-5V, 0-10V, 2-10V, or 4-20mA
Maximum Number of Actuators Supported:
0-5V, 0-10V or 2-10 V: Unlimited
4-20mA: 2
AO2
Assignment: Airflow output signal
Configurable Ranges: 0-5V, 0-10V, or 2-10V,
R1
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.
N1
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 counter sensor
Environmental Limits
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: 4.72H x 7.29W x 1.36D in. [119.9 x 185.2 x 34.5 mm]
