AAON ASM02655 Quick start guide

Main DX Barrel Chiller
Controller
Technical Guide

2Main DX Barrel Chiller Controller Technical Guide
MAIN DX BARREL CHILLER CONTROLLER REVISION LOG
REVISION AND DATE CHANGE
Rev. 01A, November 5, 2020
added Lead/Lag sequence, Added Pump Runtime screens, Chiller Pumping Module:
removed Heat Exchanger Water Side Outlet Temperature Sensor Failure Alarm def.,
removed HE GLOUT NO SENSE alarm and HE GLOUT history alarm
Rev. B, November 17, 2021 Updated format. Updated Glycol screen information
AAON
2425 South Yukon Ave.
Tulsa, OK 74107-2728
www.aaon.com
Factory Technical Support Phone: [phone]
AAON Controls Support: 866-918-1100
It is the intent of AAON to provide accurate and current
product information. However, in the interest of product
improvement, AAON reserves the right to change pricing,
specications, and/or design of its product without notice,
obligation, or liability.
AAON P/N: G070300, Rev. B
© October 2021 AAON Inc. All rights reserved.
AAON®is a registered trademark of AAON, Inc., Tulsa, OK.
BACnet®is a registered trademark of ASHRAE Inc.,
Atlanta, GA.
Java™ is a registered trademark of Oracle, Inc.
AAON assumes no responsibility for errors or omissions in
this document.
This document is subject to change without notice.
www.aaon.com
MAIN DX BARREL CHILLER CONTROLLER PARTS REFERENCE
PART DESCRIPTION PART NUMBER
Main DX Barrel Chiller Controller ASM02655
Chiller Refrigerant Module ASM02654
Vestibule Module ASM02650
Chiller Pumping Module ASM02448
Evaporative Condenser Module ASM02318
E-BUS Horizontal Outdoor Air Temp and RH Sensor ASM01836
Touchscreen Controller PPC V99840
Prism 2 Software ASM02533
CommLink 5 ASM01874
IP Module Kit ASM01902
USB Link 2 ASM02244
EBC E-BUS Cable Assembly E-BUS Power & Comm 1.5 ft., 3
ft., 10 ft., 25 ft., 50 ft., 75 ft., 100 ft., 150 ft., 250 ft., and 1000 ft.
Spool
G029440 (1.5 ft.), G012870 (3 ft.), G029460 (10 ft.), G045270 (25 ft.),
G029510 (50 ft.), G029530 (75 ft.), G029450 (100 ft.), G029470 (150 ft.),
V36590 (250 ft.), G018870 (SPOOL)
E-BUS Adapter Hub with 1.5 ft. E-BUS cable ASM01635
E-BUS Adapter Board ASM01878
All manuals are also available for download from
www.aaon.com/controlsmanuals.

3
Main DX Barrel Chiller Controller Technical Guide
TABLE OF CONTENTS
OVERVIEW....................................................................................................................... 9
General Information ................................................................................................................................................ 9
WIRING .......................................................................................................................... 10
Important Wiring Considerations........................................................................................................................... 10
Main DX Barrel Chiller Controller and Refrigerant Module I/O Maps.....................................................................11
Vestibule Module and Chiller Pumping Module I/O Maps..................................................................................... 12
Evaporative Condenser Module I/O Maps ............................................................................................................ 13
Main DX Barrel Chiller Controller Input Wiring...................................................................................................... 14
Main DX Barrel Chiller Controller Output Wiring................................................................................................... 15
Chiller Refrigerant Module Input Wiring ................................................................................................................ 16
Chiller Refrigerant Module Output Wiring ............................................................................................................. 17
Chiller Pumping Module Input Wiring.................................................................................................................... 18
Chiller Pumping Module Output Wiring................................................................................................................. 19
Evaporative Condenser Module Input Wiring ....................................................................................................... 20
Evaporative Condenser Module Output Wiring..................................................................................................... 21
Vestibule Module Input Wiring .............................................................................................................................. 22
Vestibule Module Output Wiring............................................................................................................................ 23
SEQUENCE OF OPERATIONS....................................................................................... 24
Main DX Barrel Chiller Controller - Overview........................................................................................................ 24
Main DX Barrel Chiller Controller - O󰀨 and Run Modes........................................................................................ 25
Main DX Barrel Chiller Controller - Mechanical Chiller Overview ......................................................................... 26
Main DX Barrel Chiller Controller - Safety Checks ............................................................................................... 27
Chiller Refrigeration Module - Operation .............................................................................................................. 28
Chiller Refrigeration Module - Safety Checks ....................................................................................................... 29
Vestibule Module - Operation and Safeties........................................................................................................... 30
Chiller Pumping Module - Waterside Economizer Operation................................................................................ 31
Chiller Pumping Module - Plate Heat Exchanger Operation................................................................................. 32
Chiller Pumping Module - Water Circuit Pumping Operation ................................................................................ 33
Trend Logs ............................................................................................................................................................ 34
Trend Log Alarm Bit Strings .................................................................................................................................. 35
TROUBLESHOOTING .................................................................................................... 37
Alarms and Faults ................................................................................................................................................. 37
Main DX Barrel Chiller Controller LED Diagnostics .............................................................................................. 38
Main DX Barrel Chiller Controller LED Locations ................................................................................................. 39
Refrigerant Module LED Diagnostics.................................................................................................................... 40
Refrigerant Module LED Locations ....................................................................................................................... 41
Chiller Pumping Module LED Diagnostics ............................................................................................................ 42
Chiller Pumping Module LED Locations ............................................................................................................... 43
Evaporative Condenser Module LED Diagnostics and Locations......................................................................... 44
Vestibule Module LED Diagnostics ....................................................................................................................... 45
Thermistor Sensor Testing .................................................................................................................................... 46
Suction Pressure Transducer Testing ................................................................................................................... 47
Discharge Pressure Transducer Testing ............................................................................................................... 48

4Main DX Barrel Chiller Controller Technical Guide
LCD SCREENS ............................................................................................................... 49
LCD Display, Navigation Keys and Editing Keys .................................................................................................. 49
LCD SCREENS ............................................................................................................... 50
Main Screens Map ................................................................................................................................................ 50
Settings Screens................................................................................................................................................... 51
Glycol Screens...................................................................................................................................................... 52
Status Screens...................................................................................................................................................... 53
Alarms................................................................................................................................................................... 54
RSM -LCD SCREENS .................................................................................................... 55
Main Screens Map ................................................................................................................................................ 55
RSM Screens........................................................................................................................................................ 56
Status Menu Screens............................................................................................................................................ 57
Sensor Menu Screens .......................................................................................................................................... 58
Setpoint Status Screens ....................................................................................................................................... 59
Alarm Screens ...................................................................................................................................................... 60
CHILLER PUMPING MODULE -LCD SCREENS ........................................................... 62
Main Screens Map ................................................................................................................................................ 62
Module Screens .................................................................................................................................................... 63
Module Screens .................................................................................................................................................... 64
System Status Screens......................................................................................................................................... 65
Sensor Status Screens ......................................................................................................................................... 67
Alarms Screens..................................................................................................................................................... 68
Alarms History Screen .......................................................................................................................................... 69
Setpoint Status Screens ....................................................................................................................................... 70
Pump Runtime Screens ........................................................................................................................................ 72
EVAPORATIVE CONDENSER -LCD SCREENS ............................................................ 73
Main Screens Map and Module Screens .............................................................................................................. 73
Status Menu Screens............................................................................................................................................ 74
Sensor Menu Screens .......................................................................................................................................... 75
Alarms Screen ...................................................................................................................................................... 76
Setpoint Status Screens ....................................................................................................................................... 77
VESTIBULE MODULE -LCD SCREENS ........................................................................ 78
Main Screens Map and Module Screens .............................................................................................................. 78
Status, Alarm and Setpoint Screens ..................................................................................................................... 79
MAIN DX BARREL CHILLER CONTROLLER -BACNET ................................................................................. 80
MS/TP Connection................................................................................................................................................ 80
BACnet Analog Inputs........................................................................................................................................... 81
BACnet Analog Values.......................................................................................................................................... 83
BACnet Binary Inputs............................................................................................................................................ 85
BACnet Multi-State Input ...................................................................................................................................... 93
TABLE OF CONTENTS

5
Main DX Barrel Chiller Controller Technical Guide
TOUCHSCREEN INTERFACE ........................................................................................ 94
Overview ............................................................................................................................................................... 94
Start and Logging In Screens ............................................................................................................................... 95
Changing the Passcode........................................................................................................................................ 96
Button and Icon Function ...................................................................................................................................... 97
System Settings .................................................................................................................................................... 98
Details Screens..................................................................................................................................................... 99
Schedules and Overrides.................................................................................................................................... 100
Setting, Saving and Restoring Holidays and Schedules..................................................................................... 101
Setpoints Screens............................................................................................................................................... 102
Conguration Settings Screens .......................................................................................................................... 103
Changing Conguration and Setpoint Values ..................................................................................................... 104
Alarms Screen .................................................................................................................................................... 105
Troubleshooting .................................................................................................................................................. 106
PRISM 2 ....................................................................................................................... 107
Requirements...................................................................................................................................................... 107
Controller Status Screen..................................................................................................................................... 108
Changing, Saving, and Restoring Setpoints and Charting...................................................................................114
Schedules and Holidays ......................................................................................................................................115
Schedule Override and Viewing Alarms...............................................................................................................116
RSM and EVAP Module Alarms Screens.............................................................................................................117
CPM and Vestibule Alarms and Reset Screens...................................................................................................118
CommLink 5 Connection......................................................................................................................................119
IP Module Connection......................................................................................................................................... 120
USB-Link 2 Connection....................................................................................................................................... 121
TABLE OF CONTENTS

6Main DX Barrel Chiller Controller Technical Guide
FIGURES
Figure 1: Main DX Barrel Chiller Controller Input Wiring ...................................................................................................14
Figure 2: Main DX Barrel Chiller Controller Output Wiring ................................................................................................15
Figure 3: Chiller Refrigerant Module Input Wiring ...............................................................................................................16
Figure 4: Chiller Refrigerant Module Output Wiring............................................................................................................17
Figure 5: Chiller Pumping Module Input Wiring ...................................................................................................................18
Figure 6: Chiller Pumping Module Output Wiring................................................................................................................19
Figure 7: Evaporative Condenser Module Input Wiring .....................................................................................................20
Figure 8: Evaporative Condenser Module Output Wiring ..................................................................................................21
Figure 9: Vestibule Module Input Wiring ...............................................................................................................................22
Figure 10: Vestibule Module Output Wiring............................................................................................................................23
Figure 11: Main DX Barrel Chiller Controller LED Locations...............................................................................................39
Figure 12: Refrigerant Module LED Locations.......................................................................................................................41
Figure 13: Chiller Pumping Module LED Locations ..............................................................................................................43
Figure 14: Evaporative Condenser Module LEDs .................................................................................................................44
Figure 15: Vestibule Module LEDs...........................................................................................................................................45
Figure 16: LCD Display Screen and Navigation Keys ..........................................................................................................49
Figure 17: BACnet Connection to MS/TP Network ...............................................................................................................80
Figure 18: Panel PC with Touchscreen Interface ..................................................................................................................94
Figure 19: Start Screen..............................................................................................................................................................95
Figure 20: Help Screen..............................................................................................................................................................95
Figure 21: System Overview Screen (View Only) .................................................................................................................95
Figure 22: Login Screen ............................................................................................................................................................95
Figure 23: System Overview Screen (Full Access) ...............................................................................................................96
Figure 24: New Passcode Screen ...........................................................................................................................................96
Figure 25: Manage Users Screen ............................................................................................................................................96
Figure 26: System Settings Screen .........................................................................................................................................98
Figure 27: Chiller Pump Status and Waterside Economizer Status Details screen.........................................................99
Figure 28: Evaporator Condenser Status and Vestibule Status Details Screen .............................................................99
Figure 29: RSM Status Details Screen ...................................................................................................................................99
Figure 30: RSM Status and Compressor Staging Status Details Screen..........................................................................99
Figure 31: Scheduling Screen ................................................................................................................................................100
Figure 32: Time Selection Screen..........................................................................................................................................100
Figure 33: Set Time Screen - Individual Day........................................................................................................................100
Figure 34: Holidays Screen.....................................................................................................................................................101
Figure 35: Holiday Set Time Screen......................................................................................................................................101
Figure 36: Temperatures Setpoints Screen ..........................................................................................................................102
Figure 37: Staging Delays and Timing Intervals Setpoints Screen...................................................................................102
Figure 38: Vestibules Setpoints Screen ................................................................................................................................102
Figure 39: Sensor Calibration Setpoints Screen .................................................................................................................102
Figure 40: System Conguration Main Page .......................................................................................................................103
Figure 41: Refrigeration Modules Screens ...........................................................................................................................103
Figure 42: Waterside Economizer Settings Screen.............................................................................................................103
Figure 43: Boiler Pump Settings Screen...............................................................................................................................103
Figure 44: Evaporative Condenser Module..........................................................................................................................103
FIGURES

7
Main DX Barrel Chiller Controller Technical Guide
Figure 45: Keypad Data Entry Screen...................................................................................................................................104
Figure 46: Alarms Logs Screen - Administrative Access....................................................................................................105
Figure 47: Chiller Rocker Switch Panel (Three Circuit Switches Shown) .......................................................................106
Figure 48: Prism 2 - DX Chiller Main Controller Status Screen ........................................................................................108
Figure 49: Prism 2 - Controller Setpoint Screens................................................................................................................109
Figure 50: Prism 2 - Setpoints - Temperatures .................................................................................................................... 110
Figure 51: Prism 2 - Setpoints - Staging Delays & Timing Intervals................................................................................. 110
Figure 52: Prism 2 - Setpoints - Vestibules #1 and #2 ....................................................................................................... 110
Figure 53: Prism 2 - Setpoints - Sensor Calibration............................................................................................................ 110
Figure 54: Prism 2 - Setpoints - System Conguration ...................................................................................................... 111
Figure 55: Prism 2 - Setpoints - Refrigeration Modules ..................................................................................................... 111
Figure 56: Prism 2 - Setpoints - Waterside Economizer Settings ..................................................................................... 112
Figure 57: Prism 2 - Setpoints - Building Pump Settings ................................................................................................... 112
Figure 58: Prism 2 - Setpoints - Evap Condenser Module................................................................................................. 113
Figure 59: Prism 2 - Setpoints - Help Window ..................................................................................................................... 114
Figure 60: Prism 2 - Clear Settings Conrmation Window................................................................................................. 114
Figure 61: Prism 2 - Charting Selection ................................................................................................................................ 114
Figure 62: Prism 2 - DX Barrel Chiller Chart ........................................................................................................................ 114
Figure 63: Prism 2 - Charting Selection ................................................................................................................................ 115
Figure 64: Prism 2 - Schedules Screen ................................................................................................................................ 115
Figure 65: Prism 2 - Yearly Holiday Schedule Screen ........................................................................................................ 115
Figure 66: Prism 2 - Mode Status and Override .................................................................................................................. 116
Figure 67: Prism 2 - Alarms Screen....................................................................................................................................... 116
Figure 68: Prism 2 - Refrigeration Module Alarms and Reset Screen ............................................................................. 117
Figure 69: Prism 2 - EVAP Module Alarms and Reset Screen.......................................................................................... 117
Figure 70: Prism 2 - CPM Alarms and Reset Screen ......................................................................................................... 118
Figure 71: Prism 2 - Vestibule Alarms and Reset Screen .................................................................................................. 118
Figure 72: Prism 2 - CommLink 5 Connection ..................................................................................................................... 119
Figure 73: Prism 2 - IP Module Connection..........................................................................................................................120
Figure 74: Prism 2 - USB-Link 2 Connection .......................................................................................................................121
FIGURES

8Main DX Barrel Chiller Controller Technical Guide
TABLES
TABLES
Table 1: Main DX Barrel Chiller Controller, Chiller Refrigerant Module and Chiller Pumping Module
Electrical and Environmental Requirements .......................................................................................................10
Table 2: Evaporative Condenser Module and Vestibule Module Electrical and Environmental Requirements.......10
Table 3: Main DX Barrel Chiller Controller Inputs and Outputs ...................................................................................... 11
Table 4: Chiller Refrigerant Module Inputs and Outputs................................................................................................... 11
Table 5: Vestibule Module Inputs and Outputs...................................................................................................................12
Table 6: Chiller Pumping Module Inputs and Outputs.......................................................................................................12
Table 7: Evaporative Condenser Module Inputs and Outputs .........................................................................................13
Table 8: Trend Log Descriptions...........................................................................................................................................34
Table 9: Alarm Group 1 Bit String.........................................................................................................................................35
Table 10: Alarm Group 2 Bit String.........................................................................................................................................35
Table 11: Alarm Group 3 Bit String.........................................................................................................................................35
Table 12: Alarm Group 4 Bit String.........................................................................................................................................35
Table 13: Alarm Group 5 Bit String.........................................................................................................................................35
Table 14: CPM Module Alarms Bit String ..............................................................................................................................35
Table 15: Evaporative Condenser Alarms Bit String ...........................................................................................................36
Table 16: CPM Relays Bit String ............................................................................................................................................36
Table 17: APP HB LED Blink Codes......................................................................................................................................42
Table 18: Temperature and Resistance for Type III 10K ohm Thermistor Sensors........................................................46
Table 19: 0-250 PSI Suction Pressure Transducer Coil Pressure, Temperature, and Voltage Chart for
R410-A Refrigerant..................................................................................................................................................47
Table 20: Discharge Pressure and Voltage Chart for Discharge Pressure Sensors......................................................48
Table 21: Navigation Key Functions.......................................................................................................................................49
Table 22: Editing Key Functions .............................................................................................................................................49
Table 23: Main DX Barrel Chiller Controller Alarms.............................................................................................................54
Table 24: RSM Alarms..............................................................................................................................................................60
Table 25: RSM Faults ...............................................................................................................................................................60
Table 26: RSM Lockouts..........................................................................................................................................................61
Table 27: Chiller Pumping Module Alarms ............................................................................................................................68
Table 28: Evaporative Condenser Alarms.............................................................................................................................76
Table 29: Vestibule Module Alarms ........................................................................................................................................79
Table 30: BACnet Analog Inputs.............................................................................................................................................81
Table 31: BACnet Analog Values............................................................................................................................................83
Table 32: BACnet Binary Inputs..............................................................................................................................................85
Table 33: BACnet Parameter Multi-State Input ....................................................................................................................93
Table 34: Navigation Buttons ..................................................................................................................................................97
Table 35: Conguration Buttons .............................................................................................................................................97
Table 36: Administrative Icons ................................................................................................................................................97
Table 37: System Settings Functions and Buttons ..............................................................................................................98

9
Main DX Barrel Chiller Controller Technical Guide
OVERVIEW
General Information
Control System Features and Applications
The Main DX Barrel Chiller Controller provides control of the
chilled water for a DX Barrel Chiller.
The Main DX Barrel Chiller Controller has an on-board BACnet
port for connection to a BACnet MS/TP BAS network. There are
also two E-BUS expansion ports which allow for the connection
of the Chiller Refrigerant Module, Chiller Pumping Module,
Evaporative Condenser Module, and Vestibule Module via
E-BUS cables.
In addition, the controller and its associated modules contain a
2 x 8 LCD character display with four buttons that allow for
status and alarm display and BACnet conguration.

10 Main DX Barrel Chiller Controller Technical Guide
WIRING
Important Wiring Considerations
General
Correct wiring of the Main DX Barrel Chiller Controller and its
modules is the most important factor in the overall success of
the controller installation process. The Main DX Barrel Chiller
Controller and modules are installed and wired at the AAON
factory. Some of the following information may not apply to this
specic installation if it was pre-wired at the factory.
Wiring
The Main DX Barrel Chiller Controller and associated modules
must be connected to an 18-30 VAC power source of the proper
size for the calculated VAload requirements.All transformer sizing
should be based on the VA rating listed in Table 1 and Table 2,
this page.
Please carefully read and apply the following information when
wiring the Main DX Barrel Chiller Controller and its associated
modules.
1. All wiring is to be in accordance with local and
national electrical codes and specications.
2. All 24 VAC wiring must be connected so that all
ground wires remain common. Failure to follow this
procedure can result in damage to the controller and
connected devices.
3. Minimum wire size for 24 VAC wiring should be 18
gauge.
4. Minimum wire size for all sensors should be 24 gauge.
Some sensors require two-conductor wire and some
require three-or four-conductor wire.
5. Minimum wire size for 24 VAC thermostat wiring
should be 22 gauge.
6. 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.
7. When communication wiring is to be used to
interconnect Main DX Barrel Chiller Controllers
together or to connect to other communication
devices, all wiring must be plenum-rated, minimum
18-gauge, two-conductor, twisted-pair with shield.
AAON can supply communication wire that meets
this specication and is color coded for the network or
local loop. Please consult your AAON distributor for
information. If desired, Belden #82760 or equivalent
wire may also be used.
8. Before applying power to the Main DX Barrel Chiller
Controller and its associated modules, be sure to
recheck all wiring connections and terminations
thoroughly.
WARNING: Observe Polarity. All boards must be wired
with GND-to-GND and 24 VAC-to-24
VAC. Failure to observe polarity will result
in damage to one or more of the boards.
Expansion modules must be wired in such
a way that the expansion modules 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.
Control
Device
Voltage
VA Load
Operating
Temperature
Humidity
(Non-
Condensing)
Main
DX Barrel
Chiller
Controller
Chiller
Refrigerant
Module
Chiller
Pumping
Module
18-30 VAC
(25%/-15%),
Class 2
15 10°F to 150°F
-12ºC to 66ºC 0-95% RH
Inputs
Resistive Inputs require 10KΩ
Type III Thermistor
24 VAC Inputs provide 4.7kΩ
Load
Outputs Relay Outputs: 1 amp
maximum per output.
Table 1: Main DX Barrel Chiller Controller, Chiller
Refrigerant Module, and Chiller Pumping
Module Electrical and Environmental
Requirements
Control
Device
Voltage
VA Load
Operating
Temperature
Humidity
(Non-
Condensing)
Evaporative
Condenser
Module
Vestibule
Module
18-30 VAC
(25%/-15%),
Class 2
18 10°F to 150°F
-12ºC to 66ºC 0-95% RH
Inputs
Resistive Inputs require 10KΩ
Type III Thermistor
24 VAC Inputs provide 4.7kΩ
Load
Outputs Relay Outputs: 1 amp
maximum per output.
Table 2: Evaporative Condenser Module and
Vestibule Module Electrical and
Environmental Requirements

11
Main DX Barrel Chiller Controller Technical Guide
MAIN DX BARREL CHILLER CONTROLLER
Analog Inputs
1Chiller Water In Temperature (AI1)
2Chiller Water Out Temperature (AI2)
3Barrel 1 Out Temperature (AI3)
4Barrel 2 Out Temperature (AI4)
5Chiller Out Reset (AI5)
6Flow Meter (AI6)
7Ambient Temperature (AI7)
8Not Used (AI8)
BInary Inputs
1Remote Run/Stop (BI1)
2Water Flow Switch 1 (BI2)
3Water Flow Switch 2 (BI3)
4Safety Shutdown (BI4)
5Phase Brownout (BI5)
Relay Outputs (24 VAC)
1Alarm Indicator (RLY1)
2Chiller Running (RLY2)
3Chiller Fully Loaded (RLY3)
Communication Terminals
WATTCOMM Communication Terminal Block
BACNET
MS/TP Communication Terminals Block
DUAL
E-BUS Two E-BUS Ports
Additional Inputs
NOTE: The following E-BUS sensor could be connected to the Main
DX Barrel Chiller Controller via E-BUS port or E-BUS adapter:
1. E-BUS Horizontal Outdoor Air Temperature and RH Sensor
CHILLER REFRIGERANT MODULE
Analog Inputs
1Suction Line Pressure (0-5VDC) (AI1)
2Discharge Line Pressure (0-5VDC) (AI2)
3Suction Line Temperature Sensor (AI3)
4Discharge Line Temperature Sensor (AI4)
5Liquid Line Pressure (0-5VDC) (AI5)
6Liquid Line Temperature Sensor (AI6)
7Compressor 1 Amps (AI7)
8Compressor 2 Amps (AI8)
Binary Inputs
1Compressor 1 Status (BI1)
2Compressor 2 Status (BI2)
3Compressor 1 VFD Fault (BI3)
4Circuit Disable (BI4)
5Condenser Fan Fault (BI5)
Analog Outputs (0-5 VDC)
1Compressor 1 VFD (AO1)
2Condenser Fan VFD (AO2)
3Expansion Valve (AO3)
Relay Outputs (24 VAC)
1Compressor 1 Enable (RLY1)
2Compressor 2 Enable (RLY2)
3Condenser Fan Enable (RLY3)
Communication Terminals
DUAL
E-BUS Two E-BUS Ports
Input/Output Maps
See Table 3, this page, for the Main DX Barrel Chiller Controller
Inputs/Outputs and Table 4, this page, for the Chiller Refrigerant
Module Inputs/Outputs.
Table 3: Main DX Barrel Chiller Controller Inputs and
Outputs
Table 4: Chiller Refrigerant Module Inputs and
Outputs
WIRING
Main DX Barrel Chiller Controller and Refrigerant Module I/O Maps

12 Main DX Barrel Chiller Controller Technical Guide
CHILLER PUMPING MODULE
Analog Inputs - 10K @ 77ºF Type III Thermistors
1
Waterside Economizer Primary Mixing Valve Outlet
Temperature Sensor (AI1) (Valve Outlet Mixed
Temperature)
2Heat Exchanger Water Side Outlet Temperature Sensor
(AI2)
3Heat Exchanger Glycol Side Inlet Temperature Sensor
(AI3)
4Heat Exchanger Glycol Side Outlet Temperature Sensor
(AI4)
5Chiller Pump Building Pump Suction Pressure (AI5)
6Chiller Pump Building Pump Discharge Pressure (AI6)
Binary Inputs
1Waterside Economizer VFD Fault (BI1)
2-3 Not Used (BI2) (BI3)
4Chiller Pump VFD 1 Fault (BI4)
5Chiller Pump VFD 2 Fault (BI5)
6Glycol Feeder Low (BI6)
Analog Outputs
1Waterside Economizer VFD Speed (AO1)
2Waterside Economizer Primary 3-Way Mixing Valve
Actuator (AO2)
3Waterside Economizer Secondary 3-Way Mixing Valve
Actuator (AO3)
4Chiller Pump VFD (AO4)
5Bypass Valve (AO5)
Relay Outputs (24 VAC)
1Waterside Economizer Fan Enable (RLY1)
2Waterside Economizer Glycol Circuit Pump (RLY2)
3Chiller Pump Primary A Pump 1 (RLY3)
4Chiller Pump Primary A Pump 2 (RLY4)
5Chiller Pump Secondary Pump 1 (RLY5)
6Chiller Pump Secondary Pump 2 (RLY6)
7Chiller Pump Primary B Pump 1 (RLY7)
8Chiller Pump Primary B Pump 2 (RLY8)
Communication Terminals
DUAL
E-BUS Two E-BUS Ports
VESTIBULE MODULE
Analog Inputs
1Not Used (AI1)
2Not Used (AI2)
3Not Used (AI3)
4Not Used (AI4)
5Vestibule Temperature Sensor (AI5)
6Outdoor Air Temperature Sensor (0-5VDC) (AI6)
7Not Used (AI7)
Binary Inputs
1Chiller Running Status (BI1)
2Refrigerant Leak Detector (BI2)
3Coil Pump WFS (BI3)
4Not Used (BI4)
Relay Outputs (24 VAC)
1Vent Fan Enable (RLY1)
2Coil Pump / Fan Enable (RLY2)
3Heat Enable (RLY3)
4Alarm (RLY4)
Communication Terminals
DUAL
E-BUS One E-BUS Port
Table 5: Vestibule Module Inputs and Outputs
Table 6: Chiller Pumping Module Inputs and Outputs
WIRING
Vestibule Module and Chiller Pumping Module I/O Maps

13
Main DX Barrel Chiller Controller Technical Guide
EVAPORATIVE CONDENSER MODULE
Analog Inputs
1Condenser Pump 1 Amps (SP)
2Condenser Pump 2 Amps (HP)
3Sump Temperature Sensor 1 (TEMP1)
4Sump Temperature Sensor 2 (TEMP2)
5Sump Temperature Sensor 3 (TEMP3)
6Low Sump (Dry Contact) (TEMP4)
Binary Inputs
1Pump 1 Pressure Switch (BI1)
2Pump 2 Pressure Switch (BI2)
3Condenser Pump 1 VFD Fault (BI3)
4Condenser Pump 2 VFD Fault (BI4)
Analog Outputs
1Pump 1 VFD Speed (AO1)
2Pump 2 VFD Speed (AO2)
Relay Outputs (24 VAC)
1Condenser Pump 1 Run (RLY1)
2Condenser Pump 2 Run (RLY2)
3Sump Heater Enable (RLY3)
4Drain Valve / Disable Make-Up Water (RLY4)
Communication Terminals
DUAL
E-BUS 2 E-BUS Ports
Table 7: Evaporative Condenser Module Inputs and
Outputs
WIRING
Evaporative Condenser Module I/O Maps

14 Main DX Barrel Chiller Controller Technical Guide
The Main DX Barrel Chiller Controller provides control of the
Chilled Water for one or two DX Barrel Chillers. The controller
is designed with eight analog inputs, four analog outputs, eight
binary inputs, and eight relay outputs.
The controller has an on-board BACnet port for connection to a
BACnet MS/TP network. There are also two E-BUS expansion
ports which allow the connection of communicating sensors and
E-BUS modules via E-BUS cable assemblies.
The controller contains a 2 x 8 LCD character display and four
buttons that allow for status and alarm display as well as BACnet
conguration. See Figure 1, this page, below for input wiring.
Figure 1: Main DX Barrel Chiller Controller Input Wiring
18-30 VACGND
Line Voltage
Size transformer for correct total load.
DX Barrel Chiller Controller = 15 VA
BLK
WHT
+
-
+
-
+
-
Flow Meter
(0-5 VDC)
ALARM
UP
DOWN
ENTERMENU
24 VAC POWER
ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
LABEL P/N:
G070270
+24VAC
GND
AAON P/N: ASM02655
MAIN DX BARREL CONTROLLER
VDC
OUTPUTS
GND
+ 5 VDC
+ 24VDC
ANALOG
INPUT
JUMPERS
www.aaon.com
ANALOG INPUTS
A8I = NOT USED
AI3 = BARREL1OUT TEMP
A1I = CHILLER WATER IN TEMP
AI4 = BARREL2OUT TEMP
AI5 = CHILLER OUT RESET
AI6 = FLOW METER
A7I = AMBIENT TEMP
AI2 = CHILLER WATER OUT TEMP
DUAL
E-BUS
B5I = PHASE BROWNOUT
BI4 = SAFETY SHUTDOWN
SWITCH 2
BI3 = WATER FLOW
SWITCH 1
B1I = REMOTE RUN/STOP
BINARYINPUTS
B2I = WATER FLOW
RLY1 = ALARM
INDICATOR
RLY2 = CHILLER
FULLYLOADED
RLY3 = CHILLER
RUNNING
RELAY OUTPUTS
THERM
4-20mA
0-10V
0-5V
AI8
AI7
AI6
AI5
AI4
AI3
AI2
AI1
“R”TO“R”
RS-485 COMM LOOP.
WIRE “T”TO“T”
“S” TO “S”
BACNET +
BACNET SHIELD
BACNET– = T
= SH
= R
Remote Run/Stop
Water Flow Switch 1
Water Flow Switch 2
Safety Shutdown
Phase Brownout
Chiller Water In
Temperature Sensor
Mount in chiller entering
water line
Chiller Water Out
Temperature Sensor
Mount in chiller leaving
water line
Barrel Water Out 1
Temperature Sensor
Mount in Barrel
Leaving Water Line 1
Barrel Water Out 2
Temperature Sensor
Mount in Barrel
Leaving Water Line 2
Chiller Out
Reset Signal
(0-10 VDC)
Outdoor Air
Temperature
Sensor
BLK
WHT
BLK
WHT
BLK
WHT
BLK
WHT
BLK
WHT
WIRING
Main DX Barrel Chiller Controller Input Wiring

15
Main DX Barrel Chiller Controller Technical Guide
The Main DX Barrel Chiller Controller has two E-BUS expansion
ports which allow for the connection of the Chiller Refrigerant
Module, the Chiller Pumping Module, the Evaporative Condenser
Module, and the Vestibule Module via E-BUS cables.
The Main DX Barrel Chiller Controller must be connected to
an 18-30 VAC power source. Please see Table 1, page 10, for
correct VA requirements to use when sizing the transformer(s)
used for powering the controller and its associated modules. See
Figure 2, this page, for output wiring.
NOTE: When wiring the Main DX Barrel Chiller
Controller, its contacts must be wired as wet
contacts (connected to 24 VAC).
18-30 VACGND
Line Voltage
ALARM INDICATOR
24 VAC POWER
24 VAC ONLY
R
CHILLER RUNNING
CHILLER FULLY LOADED
ALARM
UP
DOWN
ENTERMENU
24 VAC POWER
ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
LABEL P/N:
G070270
+24VAC
GND
AAON P/N: ASM02655
MAIN DX BARREL CONTROLLER
VDC
OUTPUTS
GND
+ 5 VDC
+ 24VDC
ANALOG
INPUT
JUMPERS
www.aaon.com
ANALOG INPUTS
A8I = NOT USED
AI3 = BARREL1OUT TEMP
A1I = CHILLER WATER IN TEMP
AI4 = BARREL2OUT TEMP
AI5 = CHILLER OUT RESET
AI6 = FLOW METER
A7I = AMBIENT TEMP
AI2 = CHILLER WATER OUT TEMP
DUAL
E-BUS
B5I = PHASE BROWNOUT
BI4 = SAFETY SHUTDOWN
SWITCH 2
BI3 = WATER FLOW
SWITCH 1
B1I = REMOTE RUN/STOP
BINARYINPUTS
B2I = WATER FLOW
RLY1 = ALARM
INDICATOR
RLY2 = CHILLER
FULLYLOADED
RLY3 = CHILLER
RUNNING
RELAY OUTPUTS
THERM
4-20mA
0-10V
0-5V
AI8
AI7
AI6
AI5
AI4
AI3
AI2
AI1
“R”TO“R”
RS-485 COMM LOOP.
WIRE “T”TO“T”
“S” TO “S”
BACNET +
BACNET SHIELD
BACNET– = T
= SH
= R
NOTE:
All relay outputs are normally open
and rated for 24 VAC power only.
1 amp maximum load.
Size transformer for correct total load.
DX Barrel Chiller Controller = 15 VA
Figure 2: Main DX Barrel Chiller Controller Output Wiring
WIRING
Main DX Barrel Chiller Controller Output Wiring

16 Main DX Barrel Chiller Controller Technical Guide
WIRING
Chiller Refrigerant Module Input Wiring
The Chiller Refrigerant Module provides control of the
compressors and condenser fans on a DX Barrel Chiller. Up to
six refrigerant modules can be used, one per circuit.
The module is designed with eight analog inputs, ve analog
outputs, ten binary inputs, and eight relay outputs.
The module has two E-BUS expansion ports which allow the
connection of communicating sensors and E-BUS modules via
modular cable assemblies.
The module contains a 2 x 8 LCD character display and four
buttons that allow for status and alarm display.
The Chiller Refrigerant Module must be connected to an 18-30
VAC power source. When wiring the refrigerant module, its relay
outputs must be wired as wet contacts (connected to 24 VAC).
See Figure 3, this page, for input wiring and Figure 4, page
17, for output wiring.
Circuit Disable
Discharge Line
Pressure Transducer SIG
GND
+V
BK
RD
WH
Discharge Line
Temperature
SIG
GND
+V
Suction Line
Pressure Transducer
Compressor 2 Status
Compressor 1 VFD Fault
Condenser Fan Fault
BK
RD
WH
Suction Line
Temperature
SIG
GND
+V
Liquid Line
Pressure Transducer BK
RD
WH
Liquid Line
Temperature
Compressor 1 Status
Size transformer for correct total load.
Chiller Refrigerant Module = 15 VA
18-30 VACGND
BLK
WHT
Compressor 1 Amps +
GND
BLK
WHT
Compressor 2 Amps +
GND
ALARM
UP
DOWN
ENTERMENU
24 VAC
POWER
ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED LABEL P/N:
G070260
DUAL
E-BUS
+24VAC
GND
CHILLER REFRIGERANT MODULE
AAON P/N: ASM02654
VDC
OUTPUTS
GND
+ 5 VDC
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
THERM
VOLTAGE
ANALOG
INPUT
JUMPERS
www.aaon.com
ANALOG INPUTS
AIN5 = LIQUID LINE PRESSURE
AIN3 = SUCTION LINE TEMP
AIN4 = DISCHARGE LINE TEMP
AIN2 = DISCHARGE LINE PRESSURE
AIN1 = SUCTION LINE PRESSURE
AIN8 = COMPRESSOR 2 AMPS
AIN6 = LIQUID LINE TEMP
AIN7 = COMPRESSOR 1 AMPS
BIN1 = COMP 1 STAT
BIN2 = COMP 2 STAT
BIN3 = COMP 1 VFD
FAULT
BIN5 = COND FAN FAULT
BIN4 = CIRCUIT DISABLE
BINARYINPUTS RELAY OUTPUTS
RLY1 = COMP 1
RLY2 = COMP 2
RLY3 =COND FAN
A1O= COMP 1 VFD
ANALOG OUTPUTS
A2O= COND FAN VFD
A3O= EXV
DUAL
E-BUS
Line Voltage
Figure 3: Chiller Refrigerant Module Input Wiring

17
Main DX Barrel Chiller Controller Technical Guide
WIRING
Chiller Refrigerant Module Output Wiring
18-30 VACGND
COM
+
Compressor 1 VFD
SHIELD
COM
+
Condenser Fan VFD
SHIELD
COM
+
MCS EXV
SHIELD
ALARM
UP
DOWN
ENTERMENU
24 VAC
POWER
ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED LABEL P/N:
G070260
DUAL
E-BUS
+24VAC
GND
CHILLER REFRIGERANT MODULE
AAON P/N: ASM02654
VDC
OUTPUTS
GND
+ 5 VDC
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
THERM
VOLTAGE
ANALOG
INPUT
JUMPERS
www.aaon.com
ANALOG INPUTS
AIN5 = LIQUID LINE PRESSURE
AIN3 = SUCTION LINE TEMP
AIN4 = DISCHARGE LINE TEMP
AIN2 = DISCHARGE LINE PRESSURE
AIN1 = SUCTION LINE PRESSURE
AIN8 = COMPRESSOR 2 AMPS
AIN6 = LIQUID LINE TEMP
AIN7 = COMPRESSOR 1 AMPS
BIN1 = COMP 1 STAT
BIN2 = COMP 2 STAT
BIN3 = COMP 1 VFD
FAULT
BIN5 = COND FAN FAULT
BIN4 = CIRCUIT DISABLE
BINARYINPUTS RELAY OUTPUTS
RLY1 = COMP 1
RLY2 = COMP 2
RLY3 =COND FAN
A1O= COMP 1 VFD
ANALOG OUTPUTS
A2O= COND FAN VFD
A3O= EXV
DUAL
E-BUS
COMPRESSOR 1 ENABLE
24 VAC POWER
24 VAC ONLY
R
COMPRESSOR 2 ENABLE
CONDENSER FAN
NOTE:
All relay outputs are normally open
and rated for 24 VAC power only.
1 amp maximum load.
Size transformer for correct total load.
Chiller Refrigerant Module = 15 VA
Line Voltage
Figure 4: Chiller Refrigerant Module Output Wiring

18 Main DX Barrel Chiller Controller Technical Guide
WIRING
Chiller Pumping Module Input Wiring
TB8
GND
GND
GND
R139 J10 R1
R140
C8
R141
R138
AIN8
R1
J8
R128
AIN7
R129
C8
R130
AIN6
R125
R1
J6
R116
AIN5
R117
C7
R118
+5V
R112
R1
J4
R102
+5V
R103 C7
R104
R99
J9
R1
GND
R133
GND
R134
C8
R135
R127
AIN4 J7 R1
R120
AIN3
R121 C7
R122
R110
R114
J5
AIN2
R107
AIN1
R108
R101
R9
C71
R109
J3
+5V
R94
+5V
R95
R92
C66
R96
R1
VOLTAGE
THERM
TB7
GND
GND J1
D17 R8
R84
BIN10
D16 R8
R82
BIN9
D15 R7
R77
BIN8
D14 R7
R73
BIN7
D13 R7
R68
BIN6
D12 R6
R66
BIN5
D11 R5
R58
BIN4
D10 R5
R52 R55
BIN3
R5
D9
BIN2
D8 R5
BIN1
R50
TB5 C8
U2
SOCKET
485
R+
R2
SHD
R3
T-
R4
COMM1
TB1
ASSEMBLED IN USA G044250 REV 1
TB4
RLY1
RLY2
RLY3
RLY4
RLY5
RLY6
RLY7
RLY8
COMMON
COMMON
SOFTWARE
POWER
APP HB
OS HB
WDOG
STATUS1
STATUS2
EBUS
COMM1
COMM2
R38
R22
R26
R33
R21
R25
R34
R32
R35
TB2
COMM2
C18
C22
R+
R9
SHD
R10
U6
T-
R12
R13
C17 R11
89
R88 R91
A01
A02
D3
93
8
106 D19 A03
R100 R113
D21 A04
15
4D24 A05
132
R126
D27 GND
C67
GND
C44
GND
TB6
SERIAL #
ALARM
UP
DOWN
ENTERMENU
24 VAC
POWER
ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
LABEL P/N:
G058810
DUAL E-BUS
+24VAC
GND
AAON P/N: ASM02448
CHILLER PUMPING MODULE
VDC
OUTPUTS
+ 5 VDC
GND
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
THERM
VOLTAGE
INPUT
JUMPERS
ANALOG
www.aaon.com
A 4 = HE GLYCOL SIDE OUTLET TEMPI
AI5 = CP BUILD PUMP SUCTION PRESSURE
A 6 = CP BUILD PUMP DISCHRG PRESSUREI
A 3I=HE GLYCOL SIDE INLET TEMP
ANALOG INPUTS
A 1 = MIXING VLV WATER OUTLET TEMPI
AI2 = HE WATER SIDE OUTLET TEMP
DUAL E-BUS
BI2 = NOT USED
B 3 = NOT USEDI
B 4 = CP 1I VFD FAULT
B 1 = WSE VFD FAULTI
B 5 = CP VFD 2I FAULT
B 6 = GOL FEEDI LYC ER
LOW
BINARY INPUTS
R1 = WSE FAN
R4 = PRIM A PUMP 2
R2 = GLYCOL PUMP
R3 = PRIM A PUMP 1
R8 = PRIM B PUMP 2
R6 = SEC PUMP 2
R5 = SEC PUMP 1
R7 = PRIM B PUMP 1
RELAY OUTPUTS
A=BYPASS VALVEO5
A1O=WSE VFD SPEED
A4O=CHILLER PUMP VFD
A2O=PRIMARY ACTUATOR
ANALOG OUTPUTS
A3O=SECONDARY ACTUATOR
CP Building Pump Discharge
Pressure Sensor SIG
GND
+V
BK
RD
WH
SIG
GND
+V
CP Building Pump Suction
Pressure Sensor BK
RD
WH
BLK
WHT
ESE Mixing Valve Water
Outlet Temp Sensor
Mount in WSE mixing
valve outlet water line
Heat Exchanger Waterside
Outlet Temp Sensor
Mount in heat exchanger
waterside outlet line
Heat Exchanger Glycol
Side Inlet Temp Sensor
Mount in heat exchanger
glycol side inlet line
Heat Exchanger Glycol
Side Outlet Temp Sensor
Mount in heat exchanger
glycol side outlet line
BLK
WHT
BLK
WHT
BLK
WHT
WSE VFD Fault
Chiller Pump VFD 1 Fault
Chiller Pump VFD 2 Fault
Glycol Feeder Low
18-30 VACGND
Line Voltage
Size transformer for correct total load.
Chiller Pumping Module = 15 VA
The Chiller Pumping Module modulates and stages the
compressors to satisfy the Main DX Barrel Chiller Controller’s
leaving water temperature.
The module is designed with eight analog inputs, ve analog
outputs, ten binary inputs, and eight relay outputs.
The module has two E-BUS expansion ports which allow the
connection of communicating sensors and E-BUS modules via
modular cable assemblies.
The module contains a 2 x 8 LCD character display and 4 buttons
that allow for status and alarm display.
The Chiller Pumping Module must be connected to an 18-30
VAC power source. When wiring the module, its relay outputs
must be wired as wet contacts (connected to 24 VAC).
See Figure 5, this page, for input wiring and Figure 6, page 19,
for output wiring.
Figure 5: Chiller Pumping Module Input Wiring

19
Main DX Barrel Chiller Controller Technical Guide
WIRING
Chiller Pumping Module Output Wiring
24 VAC POWER
WSE FAN ENABLE
24 VAC ONLY
R
PRIMARY A PUMP 2 ENABLE
PRIMARY A PUMP 1 ENABLE
R24 VAC POWER
+
COM
WSE VFD
+
COM
Primary Actuator
+
COM
Chiller Pump VFD
GLYCOL PUMP
SEC PUMP 1
PRIMARY B PUMP 2 ENABLE
SEC PUMP 2
PRIMARY B PUMP 1 ENABLE
+
COM
Secondary Actuator
+
COM
Bypass Valve
ALARM
UP
DOWN
ENTERMENU
24 VAC
POWER
ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
LABEL P/N:
G058810
DUAL E-BUS
+24VAC
GND
AAON P/N: ASM02448
CHILLER PUMPING MODULE
VDC
OUTPUTS
+ 5 VDC
GND
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
THERM
VOLTAGE
INPUT
JUMPERS
ANALOG
www.aaon.com
A 4 = HE GLYCOL SIDE OUTLET TEMPI
AI5 = CP BUILD PUMP SUCTION PRESSURE
A 6 = CP BUILD PUMP DISCHRG PRESSUREI
A 3I=HE GLYCOL SIDE INLET TEMP
ANALOG INPUTS
A 1 = MIXING VLV WATER OUTLET TEMPI
AI2 = HE WATER SIDE OUTLET TEMP
DUAL E-BUS
BI2 = NOT USED
B 3 = NOT USEDI
B 4 = CP 1I VFD FAULT
B 1 = WSE VFD FAULTI
B 5 = CP VFD 2I FAULT
B 6 = GOL FEEDI LYC ER
LOW
BINARY INPUTS
R1 = WSE FAN
R4 = PRIM A PUMP 2
R2 = GLYCOL PUMP
R3 = PRIM A PUMP 1
R8 = PRIM B PUMP 2
R6 = SEC PUMP 2
R5 = SEC PUMP 1
R7 = PRIM B PUMP 1
RELAY OUTPUTS
A=BYPASS VALVEO5
A1O=WSE VFD SPEED
A4O=CHILLER PUMP VFD
A2O=PRIMARY ACTUATOR
ANALOG OUTPUTS
A3O=SECONDARY ACTUATOR
18-30 VACGND
Line Voltage
NOTE:
All relay outputs are normally open
and rated for 24 VAC power only.
1 amp maximum load.
Figure 6: Chiller Pumping Module Output Wiring

20 Main DX Barrel Chiller Controller Technical Guide
WIRING
Evaporative Condenser Module Input Wiring
Sump
Temp 1
Low Sump
Pump 1 Pressure
Size transformer for correct total load.
Evaporative Condenser Module = 18 VA
18-30 VAC
GND
Condenser Pump 1 VFD Fault
Condenser Pump 2 VFD Fault
Pump 2 Pressure
Pump 1
VFD Signal COM
+
COM
+
BLK
WHT
Condenser Pump 1 Amps
+
GND
Sump
Temp 3
Sump
Temp 2
Condenser Pump 2 Amps
+
GND
ALARM
UP
DOWN
ENTERMENU
+24 VAC
GND
LABEL P/N:
G048280
24 VAC POWER ONLY
WARNING! POLARITY
MUST BE OBSERVED
OR THE CONTROLLER
WILL BE DAMAGED
EVAPORATIVE CONDENSER MODULE
www.aaon.com
E-BUS
DUAL
RLY2 = CONDENSER PUMP2RUN
RLY1 =CONDENSER PUMP1RUN
RLY4 = DRAIN VALVE /
DISABLE MAKE-UP WATER
RLY3 = SUMP HEATER ENABLE
BIN2 = PUMP2
BIN1 = PUMP1
PRESSURE SWITCH
PRESSURE SWITCH
VFD FAULT
BIN3 = COND PUMP1
VFD FAULT
BIN4 = COND PUMP2
TEMP3 = SUMP TEMP3
TEMP1 = SUMP TEMP1
TEMP2 = SUMP TEMP2
TEMP4 = LOW SUMP
(DRYCONTACT)
AAON P/N:ASM02318
SP = COND PUMP1AMPS
HP = COND PUMP2AMPS
A1=O PUMP1
VFD SPEED
AO2 = PUMP2
VFD SPEED
BLK
WHT
BLK
WHT
BLK
WHT
BLK
WHT
Pump 2
VFD Signal
Line Voltage
The Evaporative Condenser Module controls the Evaporative
Condenser of the Chiller to help control the head pressure. The
module is designed for R410-A refrigerant.
The module is connected to the Main DX Barrel Chiller
Controller. Only one Evaporative Condenser Module can be
connected.
The module provides a 2 x 8 LCD character display and four
buttons that allow for status of system operation, system
setpoints, system congurations, sensors, and alarms, and to
change the module’s address, if necessary.
See Figure 7, this page, for input wiring and Figure 8,
page 21, for output wiring.
Figure 7: Evaporative Condenser Module Input Wiring