Orion System SA E-BUS Controller - Manual (Page 5)

SA E-BUS Controller Technical Guide
Overview
5
Features
The Series A Controller (OE332-23E-VCMX-SA)—SA E-BUS Con-
troller—is designed with 6 analog inputs, 2 analog outputs, and 5 relay
outputs. Most common HVAC unit control applications can be con-
fi gured using only the SA E-BUS Controller; however, if needed, the
SA E-BUS 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 Expan-
sion 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 E-BUS Controller can also use the Two Condenser Head Pres-
sure Module ( OE370-23-HP2C) for those applications requiring Head
Pressure Control. The SA E-BUS Controller can also use the WSHP
Module (OE334-23-WPM-A) for Water Source Heat Pump applications.
Each SA E-BUS 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 Module)
Features and Applications
Applications
Variable Air Volume Unit
The SA E-BUS 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 E-BUS Controller.
VAV units are typically designed for occupied Cooling with Morning
Warm-up Heating. This option is available with the SA E-BUS Control-
ler. The SA E-BUS Controller can also be used for a Zoning System that
needs Duct Static Pressure control and Occupied Cooling and Heating.
The SA E-BUS Controller also has the ability to be confi gured for Duct
Static Pressure Control by controlling the Supply Fan VFD for the pur-
pose of maintaining proper Duct Static Pressure in response to varying
fi lter loading conditions.
The SA E-BUS 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 E-BUS Controller activates Cooling
based on the Evaporator Coil Temperature and activates
AAON ® Modu-
lating Hot Gas Reheat to warm the Supply Air Temperature to the Active
Supply Air Temperature Setpoint.
Constant Air Volume Unit
The SA E-BUS Controller can be confi gured to activate a Constant
Volume Supply Fan. In most cases, this is a very basic unit with Space
Temperature control.
Make-Up Air Unit
The SA E-BUS 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 E-BUS 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.