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OUTDOOR AIRFLOW CONTROLLER

Airflow Controller up to 2 Probes
Airflow Controller up to 2 Probes
OAC-3000s UI Internal Connections
OAC-3000s UI Internal Connections
GF-N30000 Controller External Connections
GF-N30000 Controller External Connections
IAT-UI Adjustable Probe
IAT-UI Adjustable Probe
OAC-3000s Built-in Real Time Clock
OAC-3000s Built-in Real Time Clock
IAT- UI Flexible Installation
IAT- UI Flexible Installation

OAC-3000S-IAT-UI

OAC-3000s-IAT-UI

OAC Series

Outdoor Airflow Controller Module with Probe and Network Control Connection for MP-Bus Actuators

Modules for Systems without an Airside Economizer

The OAC-3000s-IAT-UI has a single-integrated duct probe sensor that reduces cost by eliminating the redundancy of a separate transmitter for airflow and temperature measurement. 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 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 improve 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 loadmaster. An RS-485 signal isolator is available when an isolated MS/TP network is required.
  • 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
  • Save energy
Overview PDF

FEATURES

  • 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

Specifications

FUNCTIONALITY

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

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

Built-in RTC Scheduler Modes:

Off: No schedule set

Days: Allows a 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

USER INTERFACE

Display: 16-character alpha-numeric LCD

Navigation: 4-button interface

BINARY INPUT

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

MP-BUS OUTPUT

MP1

Assignment: MP-Bus proportional actuator network signal (requires MP-bus cable, sold separately)

CONTACT CLOSURE RELAY

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.

NETWORK CONNECTIONS

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 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

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]

PROBE FUNCTIONALITY

Airflow Measurement: Provides individual sensor node airflow rates to compatible GreenTrol transmitters and controllers

Temperature Measurement: Provides individual sensor node temperatures to compatible GreenTrol transmitters and controllers

AIRFLOW/TEMPERATURE MEASUREMENT PROBE

Type: -UI Universal Insertion Mount Thermal Dispersion Airflow and Temperature Measurement Probe

Available Configurations

Single: 1 probe x 1 sensor node

Dual: 2 probe x 1 sensor nodes

Sensing Node Sensors

Self-heated sensor: Precision, hermetically sealed, bead-in-glass thermistor probe

Temperature sensor: Precision, hermetically sealed, bead-in-glass thermistor probe

Probe Tube

Material: Mill finish 6063 aluminum

Probe Mounting Brackets

Material: 304 stainless steel

Probe Length: 6, 8 or 16 in. [152.4, 203.2 or406.4 mm] (adjustable)

Sensing Node Housing

Material: Glass-filled Polypropylene

Sensor Potting Materials: Waterproof marine epoxy

Sensing Node Internal Wiring

Sensing Node Internal Wiring: Kynar® coated copper

Probe to Transmitter Cables

Material: FEP jacket, plenum rated CMP/FT6/CL2P, UL/cUL listed, -67 to 392 ⁰F [-55 to 200 ⁰C], UV tolerant

Standard Lengths: 10, 25 and 50 ft. [ 3.1, 7.6 and 15.2 m]

Connecting Plug: 0.60” [15.24 mm] nominal diameter

Airflow Measurement

Averaging Method: Independent, arithmetic average

Installed Accuracy: Better than ±4% of reading to NIST traceable airflow standards

Calibrated Range: 0 to 3,000 fpm [0 to 15.24 m/s]

Calibration Points: 7

Temperature Measurement

Averaging Method: Independent, velocity weighted

Accuracy: ±0.15⁰F [0.08 ⁰C]

ENVIRONMENTAL LIMITS, POWER REQUIREMENTS & DIMENSIONS

Environmental Limits

Temperature: -20 to 160 ⁰F [-28.9 to 48.9 ⁰C]

Note: Temperature limits for operation may be limited by the transmitter or controller selected

Humidity: 0 to 100%

RELATED DOCUMENTATION

Product Catalog

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Product Brochure

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Product Manual

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Users Product Manual

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Wiring Diagram

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OAC-3000S Controller

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Loris, SC 29569
United States
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