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The OAC-4000 modulates a proportional analog actuator or fan speed controller to maintain the outdoor airflow rate. The analog actuator solution allows for larger damper sizes and is ideal for ducted systems to fan coils, makeup air to air handlers, makeup air fans or zone level DOAS applications. DCV requires approved BACnet MS/TP CO2 sensors or occupancy counters.
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: Not supported
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
BI
Type: Binary Input (BI1)
Assignment: Mode activation trigger signal
Configurable Ranges: 0-24VAC or 0-24VDC
Trigger Threshold
VAC configuration: 6.5 VAC
VDC configuration: 8 VDC
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
MP1
Assignment: MP-Bus proportional actuator network signal (requires MP-bus cable, sold separately)
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 counters 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: 4.34H x 6.59W x 1.83D in. [110.2 x 167.3 x 46.6 mm]
