Orion SA Controller User Manual
Factory Packaged Controls
SA Controller
Technical Guide
SA Controller Code: Y200921
Requires System Manager Code: Y200921SM Version 1.0 and up
Requires Service Tool Code: Y200921HH Version 1.0 and up
Table of Contents
OVERVIEW ....................................................................................................................................... 4
Part Number Cross Reference ..................................................................................................................................................4
Features and Applications ........................................................................................................................................................5
SA Controller Dimensions ........................................................................................................................................................6
SA Expansion Module Dimensions ..........................................................................................................................................7
12-Relay Expansion Module Dimensions ................................................................................................................................8
SA Controller Component Locations .......................................................................................................................................9
INSTALLATION AND WIRING ........................................................................................................10
Important Wiring Considerations ...........................................................................................................................................10
SA Controller Wiring ...............................................................................................................................................................11
Digital Room Sensor ..........................................................................................................................................................12
Space Temperature Sensor ...............................................................................................................................................13
Remote SAT Reset Signal .................................................................................................................................................13
Supply Air Temperature Sensor ................................................................................................. ........................................14
Entering Water Temperature Sensor .................................................................................................................................15
Entering Air Temperature Sensor .......................................................................................................................................16
Water Side Economizer Valve ...........................................................................................................................................17
Water Side Economizer Bypass Valve ..............................................................................................................................17
Supply Fan VFD Signal or Zoning Bypass Damper Actuator Signal .................................................................................18
SA Expansion Module Input Wiring ........................................................................................................................................20
SA Expansion Module Output Wiring .....................................................................................................................................21
Suction Pressure Transducer ............................................................................................................................................22
SA Expansion Module Binary Inputs ................................................................................................................................23
Entering Air Humidity Sensor .............................................................................................................................................24
Indoor Wall-Mounted Humidity Sensor ..............................................................................................................................25
Modulating Heating Device ................................................................................................................................................26
Modulating Cooling Signal(s) .............................................................................................................................................27
12-Relay Expansion Module .............................................................................................................................................30
Two Condenser Head Pressure Module ............................................................................................................................32
Water Source Heat Pump Protection Module ....................................................................................................................33
START-UP AND COMMISSIONING
Addressing & Powering Up .....................................................................................................................................................34
Before Applying Power ......................................................................................................................................................34
Controller Addressing ........................................................................................................................................................34
Power Wiring ....................................................................................................................................................................34
Initialization ........................................................................................................................................................................35
Operating Summary ..........................................................................................................................................................35
Programming the Controller ...................................................................................................................................................35
www.aaon.com
WattMaster Controls Inc.
8500 NW River Park Drive · Parkville , MO 64152
Toll Free Phone: 866-918-1100
PH: (816) 505-1100 · FAX: (816) 505-1101 · E-mail: mail@wattmaster.com
Visit our web site at www.orioncontrols.com
WattMaster Form : AA-SA-TGD-01C
Copyright August 2012 WattMaster Controls, Inc.
AAON Part Number: R97490
®
AAON
is a registered trademark of AAON, Inc., Tulsa, OK.
Copeland Digital Scroll™ is a registered trademark of Copeland Corporation,
Sidney, OH
EBTRON® is a registered trademark of Ebtron, Inc., Loris, SC.
Neither WattMaster Controls, Inc. nor AAON
assumes any responsibility for errors or omissions in this document.
This document is subject to change without notice.
®
Table of Contents
INPUTS AND OUTPUTS
SA Controller Inputs and Outputs ..........................................................................................................................................36
SA Expansion Module Inputs and Outputs ............................................................................................................................37
SEQUENCE OF OPERATION ..........................................................................................................38
Operation Modes ......................................................................................................................................................................38
Occupied/Unoccupied Mode of Operation .........................................................................................................................38
HVAC Modes of Operation ................................................................................................................................................38
Vent Mode Operation .........................................................................................................................................................38
Cooling Mode Operation ....................................................................................................................................................38
Stage Control Window .......................................................................................................................................................40
Modulating Cooling ............................................................................................................................................................40
DX Cooling .......................................................................................................................................................................40
Air Cooled Condenser Fan Operation ...............................................................................................................................41
Water Side Economizer Operation (Valves 1 & 2) .............................................................................................................41
Water Cooled Condenser (Valve 3) ...................................................................................................................................41
Chilled Water Cooling ........................................................................................................................................................41
External Cooling ................................................................................................................................................................41
Dehumidifi cation Mode ......................................................................................................................................................42
Coil Temperature Reset .....................................................................................................................................................42
Reheat Control ..................................................................................................................................................................43
Coil Temperature Offset .....................................................................................................................................................43
Heating Mode ...................................................................................................................................................................43
Stage Control Window .......................................................................................................................................................43
Hot Water or Modulating Steam Heating ...........................................................................................................................44
External Heat .....................................................................................................................................................................44
Air to Air Heat Pump Operation .........................................................................................................................................44
Water Source Heat Pump Operation .................................................................................................................................44
Morning Warm-Up Mode ...................................................................................................................................................44
Off Mode ............................................................................................................................................................................45
Supply Air Temperature Setpoint Reset .............................................................................................................................45
Supply Fan Control ............................................................................................................................................................45
Duct Static Pressure Control .............................................................................................................................................45
Pre-Heater Operation ........................................................................................................................................................46
Entering Air Lockouts ......................................................................................................... ................................................46
Supply Air Cutoffs ..............................................................................................................................................................47
SA Controller Alarms .........................................................................................................................................................48
VAV/Zone Controller Alarms ..............................................................................................................................................49
Scheduling .........................................................................................................................................................................50
Internal Trend Logging .......................................................................................................................................................50
Force Modes or Overrides .................................................................................................................................................51
VAV Terminal Unit Controller Compatibility ........................................................................................................................51
VAV/Zone System ..............................................................................................................................................................51
TROUBLESHOOTING ..................................................................................................................... 52
LED Diagnostics .......................................................................................................................................................................52
Diagnostic LED Operation .......................................................................................................................................................53
APPENDIX
System Confi gurations ............................................................................................................................................................54
Stand-Alone System Layout ..............................................................................................................................................55
Interconnected System Layout ..........................................................................................................................................56
Networked System Layout .................................................................................................................................................57
Temperature Sensor Testing ...................................................................................................................................................58
OE265 Series RH Sensor Testing .....................................................................................................................................59
OE271 Pressure Sensor Testing .......................................................................................................................................60
OE275-01 Suction Pressure Transducer Testing for R410A Refrigerant ...........................................................................61
INDEX ............................................................................................................................................ 62
SA Controller Technical Guide 3
Overview
Part Number Cross Reference
PART DESCRIPTION
SA Controller OE332-23-SA-A R96070
SA Expansion Module OE333-23-SA-A R96180
12-Relay Expansion Module OE358-23-12R R69180
E-BUS Distribution Module OE365-23-EBD-A R82930
Two Condenser Head Pressure Module OE370-23-HP2C R90230
Water Source Heat Pump Protection Module - 410A OE334-23-WPM-A R88350
Water Source Heat Pump Protection Module - 410A - 20% Glycol OE334-23-WPM-A20 R99750
Water Source Heat Pump Protection Module - 410A - 40% Glycol OE334-23-WPM-A40 R99760
Bypass & Slave Interface Card PL101824 N/A
Bypass Damper Actuator OE281-04 N/A
CommLink IV Communications Interface OE361-12 R66760
Digital Room Sensor - Temp & Humidity OE217-01 R83870
Digital Room Sensor - Temp. Only OE217-00 R83860
Duct Static Pressure Sensor OE271 P87100
Duct Temperature Sensor - 12" Probe OE231 R44940 / P87140
Duct Temperature Sensor - 6" Probe OE230 R36340
IP Module Kit OE415-02 R66770
MiniLink Polling Device OE364-22 N/A
Modular Service Tool - Operator Interface OE391-08 V09280
Modular System Manager - Operator Interface OE392-08 V09270
Entering Air RH Sensor - 3% - 0-5 VDC Output OE265-14 R34700
Entering Air Temperature Sensor OE250 R34650
Remote Link II Modem Kit OE419-06 R69760
Room Mounted RH Sensor - 3% - 0-5 VDC Output OE265-11 R34690
Standard Room Sensor - Plain OE210 R31480
Standard Room Sensor - w/ Override OE211 P87040
Standard Room Sensor - w/ Override & Slide Adjust OE213 P94320
Standard Room Sensor - w/ Slide Adjust OE212 P94100
Static Pressure Pickup Tube OE290 S18780
Suction Pressure Transducer OE275-01 R28390
USB-Link Kit OE366 R71870
ORION
PART NO:
AAON TULSA
PART NO:
4
Revised 10/18/10
SA Controller Technical Guide
Overview
Features and Applications
Features
The Series A Controller (OE332-23-SA)—SA Controller—is designed
with 6 analog inputs, 2 analog outputs, and 5 relay outputs. Most common 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 ( OE33323-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 Module ( 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
Hot Gas Reheat Valve Controller
®
MHGRV Modulating
• 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)
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
W arm-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
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 Temperature 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.
AAON® Modulating Hot
SA Controller Technical Guide
5
Overview
SA Controller Dimensions
Figure 1: OE332-23-SA Controller – SA Controller Dimensions
6
SA Controller Technical Guide
Overview
SA Expansion Module Dimensions
Figure 2: OE333-23-SA – SA Expansion Module Dimensions
SA Controller Technical Guide
7
Overview
12-Relay Expansion Module Dimensions
Figure 3: OE358-23-12R – 12-Relay Expansion Module Dimensions
8
SA Controller Technical Guide
Overview
SA Controller Component Locations
Figure 4: OE332-23-SA – SA Controller Component Locations
SA Controller Technical Guide
9
Installation & Wiring
Important Wiring Considerations
Zone
Zone
General
Correct wiring of the SA Controller is the most important factor in the
overall success of the controller installation process. In general, most SA
Controllers are factory installed and wired at the AAON
®
factory.
Controller Mounting
When the controller is to be fi eld mounted, it is important to mount the
controller in a location that is free from extreme high or low temperatures,
moisture, dust, and dirt. See Table 1 for a list of the required operating
conditions for the SA Controller and associated modules.
The SA Controller is housed in a plastic enclosure. It is designed to be
mounted by using the 3 mounting holes in the enclosure base. The SA
Controller needs to be installed in an environment which can maintain
a temperature range between -30°F and 150°F not to exceed 90% RH
levels (non-condensing). It is important to mount the controller in a
location that is free from extreme high or low temperatures, moisture,
dust, and dirt. Be careful not to damage the electronic components when
mounting the controller.
Considerations
The SA Controller and associated modules must be connected to a
24 VAC power source of the proper size for the calculated VA load
requirements. All transformer sizing should be based on the VA rating
listed in Table 1.
Device
Control
OE332-23-SA Controller
SA Controller
OE333-23-SA
SA Expansion Module
OE358-23-12R
12-Relay Expansion
Module
OE370-23-HP2C
Two Condenser Head
Pressure Module
OE334-23-WPM-A
Water Source Heat Pump
Protection Module
OE365-23-EBD
E-BUS Distribution
Module
Voltage
24VAC 8
24VAC 10
24VAC 15
24VAC 5
24VAC 8
24VAC 50
VA Load
Temperature
-30°F to
150°F
-30°F to
150°F
-30°F to
150°F
-30°F to
150°F
-30°F to
150°F
-30°F to
150°F
(Non-
Humidity
Condensing)
90% RH
90% RH
90% RH
90% RH
90% RH
90% RH
Warning: When using a single transformer to power more
than one controller or expansion module, the correct polarity must
always be maintained between the boards. Failure to observe correct
polarity will result in damage to the SA Controller and associated
modules.
Please carefully read and apply the following information when wiring
the SA Controller or its associated modules. See Figure 5 on page 12
for the SA Controller wiring diagram. See Figur es 16 and 17 on pages
20 and 21 for SA Expansion Module wiring. And see Figure 24 on page
28 for 12-Relay Expansion Module wiring.
1. All wiring is to be in accordance with local and national
electrical codes and specifi cations.
2. Minimum wire size for 24 VAC wiring should be 18-gauge.
3. Minimum wire size for all sensors should be 24-gauge.
Some sensors require 2-conductor wire and some require
3-or 4-conductor wire.
4. Be sure that all wiring connections are properly inserted
and tightened into the terminal blocks. Do not allow wire
strands to stick out and touch adjoining terminals which
could potentially cause a short circuit.
5. When communication wiring is to be used to interconnect
SA Controllers together or to connect to other
communication devices, all wiring must be plenum-rated,
minimum 18-gauge, 2-conductor, twisted pair with shield.
WattMaster can supply communication wire that meets this
specifi cation and is color coded for the network or local
loop. Please consult your WattMaster distributor for
information. If desired, Belden #82760 or equivalent wire
may also be used.
6. Before applying power to the SA Controller, be sure
to recheck all wiring connections and terminations
thoroughly.
Table 1: Voltage and Environment Requirements
10
SA Controller Technical Guide
Installation & Wiring
SA Controller Wiring
SA Controller
The Series A Controller (OE332-23-SA)—SA Controller—is designed
with 6 analog inputs, 2 analog outputs, and 5 relay outputs. Most common 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 ( OE33323-SA) or 12-Relay Expansion Module ( OE358-23-12R) by means of
a modular cable.
NOTE: Only one SA Controller is required whether the SA Unit
is a Single Cabinet or Dual Cabinet Unit. Additional wiring for
Dual Cabinet Units is shown and noted as such on the applicable
Single Cabinet Unit Diagrams.
Figure 5: OE332-23-SA Controller – SA Controller Wiring
SA Controller Technical Guide
11
Installation & Wiring
Digital Room Sensor Wiring
Digital Room Sensor
The OE217-00 Digital Room Sensor is used to sense Space Temperature
and the OE217-01 Digital Room Sensor is used to sense Space Temperature and Space Humidity. The Sensor connects to the SA Controller with
the TSDRSC modular cable. It should be mounted at approximately 5
ft. above the fl oor on the wall in an area that does not have drafts or is
exposed to direct sunlight. See Figure 6 for wiring details.
Zone
Zone
Figure 6: OE217-00 & OE217-01 – Digital Room Sensor Wiring
12
SA Controller Technical Guide
Installation & Wiring
SAT & Remote SAT Reset Signal Wiring
Space Temperature Sensor
The OE210, OE211, OE212, OE213 Space Temperature Sensor is typically used for constant volume HVAC unit applications controlling one
zone. The Space T emperature Sensor is a 10K T ype III thermistor sensor
and should be mounted approximately 5 feet above the fl oor in the space
that is to be controlled. The Space Temperature Sensor is available as a
sensor only, sensor with override button, sensor with slide adjust, and
sensor with slide adjust and override confi gurations.
When the Remote Supply Air T emperature Reset Signal option is needed,
the Slide Offset option on the Room Sensor cannot be used. Only one
of these options may be used on the SA Controller.
See Figure 7 below for complete Space Temperature Sensor wiring
details.
Remote SAT Reset Signal
A Remote Supply Air T emperature Reset Signal can be connected to AI7
for applications requiring remote reset of the Supply Air Temperature
Setpoint.
When the Slide Offset option on the Room Sensor is used, the Remote
Supply Air Temperature Reset Signal cannot be used. Only one of these
options may be used on the SA Controller.
The SA Controller can accept either a 0-5 VDC signal or a 0-10 VDC
signal on this input.
See Figure 8 below for complete Remote SAT Reset Signal wiring
details.
Figure 7: OE210, OE211, OE212, OE213 – Space Temperature Sensor Wiring
Figure 8: Remote Supply Air Temperature Reset Signal Wiring
SA Controller Technical Guide
13
Installation & Wiring
SAT Sensor Wiring
Zone
Zone
Supply Air Temperature Sensor
The OE231 Supply Air Temperature Sensor must be wired as shown
in Figure 9 below for proper operation. The Supply Air Temperature
Sensor is a 10K Type III thermistor sensor. The Supply Air Temperature Sensor should be mounted in the unit discharge plenum or in the
supply air duct.
NOTE: For Dual Cabinet Units, mount the Supply Air
Temperature Sensor in a Supply Air Ducting area that is common
to both SA Units.
Figure 9: OE231 – Supply Air Temperature Sensor Wiring
14
SA Controller Technical Guide
Installation & Wiring
Entering Water Temperature Sensor Wiring
Entering Water Temperature Sensor
The OE233 Entering W ater T emperature Sensor must be wired as shown
in Figure 10 below for proper operation. The Entering Water Tempera-
ture Sensor is a 10K Type III thermistor sensor. The Entering Water
Temperature Sensor should be mounted in the entering water piping.
NOTE: For Dual Cabinet Units, mount the Entering Water
Temperature Sensor in an Entering Water Piping area that is
common to both SA Units.
Figure 10: OE233 – Entering Water Temperature Sensor Installation & Wiring
SA Controller Technical Guide
15
Zone
Installation & Wiring
Entering Air Temperature Sensor Wiring
Zone
Entering Air Temperature Sensor
The OE231 Entering Air Temperature Sensor must be wired as shown
in Figure 11 below for proper operation of the SA Controller. The Entering Air Temperature Sensor is a 10K Type III thermistor sensor. The
sensor should be mounted as shown in an area that is protected from the
elements and direct sunlight.
NOTE: For Dual Cabinet Units, mount the Entering Air
Temperature Sensor in an Entering Air Duct area that is common
to both SA Units.
Figure 11: OE231 – Entering Air Temperature Sensor Wiring
16
SA Controller Technical Guide
Installation & Wiring
Water Side Economizer Wiring
Water Side Economizer (WSE) Valve(s)
The Water Side Economizer Valve(s) must be wired as shown in Figure
12 below for proper operation of the SA Controller. The Water Side
Economizer Valve(s) connects to AO1 on the SA Controller.
NOTE: For Dual Cabinet Units, wire the Second Cabinet’s WSE
Valve Actuator in parallel with the First Cabinet’s WSE Valve
Actuator.
Water Side Economizer (WSE) Bypass
Valve
The W ater Side Economizer Bypass Valve(s) must be wired as shown in
Figure 13 below for proper operation of the SA Controller. The Water
Side Economizer Bypass Valve(s) are wired to AO4 and AO5 on the
SA Expansion Module.
NOTE: For Dual Cabinet Units, wire the Second Cabinet’s WSE
Bypass Valve Actuator to AO5 on the SA Expansion Module.
Figure 12: Water Side Economizer Valve Wiring
Figure 13: Water Side Economizer Bypass Valve Wiring
SA Controller Technical Guide
17
Installation & Wiring
Supply Fan VFD Signal
Supply Fan VFD Signal or Zoning
Bypass Damper Actuator Signal
The Supply Fan VFD or Zoning Bypass Damper Actuator Signal is a
0-10 VDC output from AO2 on the SA Controller . This signal output can
be connected to the Supply Fan Variable Frequency Drive to modulate
the Supply Fan speed and control Duct Static Pressure utilizing the Duct
Static Pressure Sensor connected to the SA Controller. Alternatively, it
can be connected to a Zoning Bypass Damper Actuator that will modulate the Zoning Bypass Damper Actuator to control Duct Static Pressure
utilizing the Duct Static Pressure Sensor connected to the SA Controller.
A Duct Static Pressure Sensor must be connected in order for the VFD
or Zoning Bypass Damper Actuator to operate. See Figures 14 and 15
for detailed wiring.
Zone
Zone
Caution: Variable Frequency Drive units can cause large transient
noise spikes which can cause interference to be propagated on other
electronic equipment. Use shielded wire wherever possible and route
all sensor and controller wiring away from the Variable Frequency
Drive and the HVAC Unit electrical wiring.
NOTE: For Dual Cabinet Units, VFD #2 must be wired in
parallel to VFD #1 as shown in Figure 14 below.
Figure 14: Supply Fan VFD Wiring
18
SA Controller Technical Guide
Supply Fan VFD Signal or Zoning
Bypass Damper Actuator Signal
When the Bypass Damper is used (Zoning applications), be sure the
Bypass Duct and Damper are designed so that Supply Air will bypass
to the Entering Air Duct, ensuring equal airfl ow to both cabinets.
Installation & Wiring
Zoning Bypass Damper Actuator
Figure 15: Zoning Bypass Damper Actuator Wiring
SA Controller Technical Guide
19
Installation & Wiring
SA Expansion Module Input Wiring
Zone
Zone
SA Expansion Module
Two different Expansion Modules are available for use with the SA
The 12-Relay Expansion Module ( OE358-23-12R) provides for 12
Dry Contact Confi gurable Relay Outputs. See Figure 25 for complete
wiring details.
Controller to provide additional inputs and outputs beyond those found
on the SA Controller.
The expansion modules can be used individually or together to provide
the required inputs and outputs for your specifi c applications.
The SA Expansion Module ( OE333-23-SA Controller) provides 8 Binary
Inputs, 4 Analog Inputs, 5 Analog Outputs, and 4 Confi gurable Relay
Outputs. See Figures 16 and 17 for complete wiring details.
WARNING!!
Observe Polarity! All boards must be wired with GND-to-GND and 24VAC-to-24VAC. Failure to observe polarity
will result in damage to one or more of the boards. Expansion Module must be wired in such a way that the
expansion module and the controller are always powered together. Loss of power to the expansion module will
cause the controller to become inoperative until power is restored to the expansion module.
10 VA Minimum Power Required
For SA Expansion Module
24 VAC
GND
Additional Suction
Pressure Sensor Required
On Dual Units Only.
Modular Cable
Connect To SA Controller
Modular Cable
Connect To E-BUS Distribution
Module (When Used)
See Suction Pressure
Transducer Wiring Details For
Complete Wiring Information.
See Humidity Sensor Wiring
Details For Complete Wiring
Information.
Entering Air
Humidity Sensor
VAC OR DC
GND
0-5V
Indoor Air
Humidity Sensor
VIN
GND
VOUT (0-5V)
Suction Pressure
Transducer #2
Suction Pressure
Transducer #1
Splice Wire As Required To Reach
From Transducer Location To
Expansion Module Location
Water Proof of Flow A- N.O. Input
Water Proof of Flow B - N.O. Input
Air Proof Of Flow - N.O. Input
Remote Forced Occupied - N.O. Input
Emergency Shutdown - N.C. Input
Drain Pan Overflow A - N.O. Input
Drain Pan Overflow B - N.O. Input
Dirty Filter - N.O. Input
WH
BK
RD
RD
WH
BK
GND
GND
B 1I
B 2I
B 3I
B 4I
B 5I
B 6I
B 7I
BI8
AI1
AI2
AI3
AI4
SA
SA Expansion Module
Figure 16: OE333-23-SA – SA Expansion Module Input Wiring
20
Revised 6/21/11
SA Controller Technical Guide
Installation & Wiring
SA Expansion Module Output Wiring
The SA Expansion Module must be connected to 24 VAC as shown in
the wiring diagram below. Please see Table 1 on page 10 for correct VA
requirements to use when sizing the transformer(s) used for powering
the expansion module.
Also please note that when wiring the SA Expansion Module, its contacts
must be wired as wet contacts (connected to 24 VAC).
Figure 17: OE333-23-SA – SA Expansion Module Output Wiring
SA Controller Technical Guide
21
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