Orion System SA Controller - Manual (Page 5)

SA Controller Technical Guide
Overview
5
Features
The Series A Controller (OE332-23-SA)—SA Controller—is designed
with 6 analog inputs, 2 analog outputs, and 5 relay outputs. Most com-
mon HVAC unit control applications can be confi gured using only the
SA Controller; however, if needed, the SA Controller’s input and output
capabilities can be expanded with the SA Expansion Module ( OE333-
23-SA) or 12-Relay Expansion Module (OE358-23-12R) by means of
a modular cable. The SA Expansion Module provides an additional 4
analog inputs, 5 analog outputs, 8 binary inputs, and 4 confi gurable
relays. The 12-Relay Expansion Module provides an additional 12
confi gurable relays.
The SA Controller can also use the Two Condenser Head Pressure Mod-
ule ( OE370-23-HP2C) connected to the E-BUS Distribution Module
( OE365-23-EBD-A) for those applications requiring Head Pressure
Control. The SA Controller can also use the WSHP Protection Module
(OE334-23-WPM-A) connected to the E-BUS Distribution Module for
Water Source Heat Pump applications.
Each SA Controller can be confi gured for control of VAV Units (with or
without VAV/Zone Controllers), Constant Volume Units, and Make-Up
Air Units. Features include the following:
• Modulating Cooling Output ( Copeland Digital
Scroll™ Compressor or Chilled Water Valve Control)
• Modulating Heating Output ( Hot Water Valve,
Steam Valve, SCR Electric Heat Control)
• Full Integration with the AAON ® MHGRV Modulating
Hot Gas Reheat Valve Controller
• Confi gurable for Air to Air and Water Source Heat Pump
Applications
• Advanced Dehumidifi cation Capabilities
• Adaptive Supply Air Reset
• Selectable Control Sensor
• Fan Proving Interlock
• Dirty Filter Alarm
• Emergency Shutdown Input (Smoke Detector/Firestat or
other Shutdown Conditions)
•
Water Side Economizer Option
• Remote Occupied Capabilities
• 7-Day, 2-Event-per-Day Scheduling
• 14 Holiday Event Scheduling
• Optimal Start Scheduling
• Trend Logging Capability
• Static Pressure Control for Filter Loading Applications
•
Head Pressure Control (with optional Two Condenser Head
Pressure Module)
• Additional Water Safeties (with optional Water
Source Heat Pump Protection Module)
Features and Applications
Applications
Variable Air Volume Unit
The SA Controller can be confi gured to control a VFD Supply Fan for
Duct Static Pressure control. If the unit is not equipped with a VFD,
but Duct Static Pressure control is needed, a modulating Zoning Bypass
Damper can be controlled by the SA Controller.
VAV units are typically designed for occupied Cooling with Morning
Warm-up Heating. This option is available with the SA Controller. The
SA Controller can also be used for a Zoning System that needs Duct Static
Pressure control and Occupied Cooling and Heating. The SA Controller
also has the ability to be confi gured for Duct Static Pressure Control by
controlling the Supply Fan VFD for the purpose of maintaining proper
Duct Static Pressure in response to varying fi lter loading conditions.
The SA Controller allows Dehumidifi cation Priority on a VAV unit.
This could be useful on a building with a very low internal sensible
load, but which has a high internal and/or external latent load. During
VAV Dehumidifi cation, the SA Controller activates Cooling based on
the Evaporator Coil Temperature and activates
AAON ® Modulating Hot
Gas Reheat to warm the Supply Air Temperature to the Active Supply
Air Temperature Setpoint.
Constant Air Volume Unit
The SA Controller can be confi gured to activate a Constant Volume
Supply Fan. In most cases, this is a very basic unit with Space Tem-
perature control.
Make-Up Air Unit
The SA Controller can be confi gured for 100% Outdoor Air control for
Make-Up Air. All HVAC Modes are determined from the Outdoor Air
Sensors. The Outdoor Air Volume must always be at least 50% or higher
to be confi gured for Outdoor Air control.
Single or Dual Cabinet Unit
The SA Controller can control an SA Series Single Cabinet Unit or an
SA Series Dual Cabinet Unit. Wiring for Dual Cabinet Units is shown
and noted on applicable Single Cabinet Unit diagrams.