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Product Summary:

The KE2 Compressor Sequencer OEM allows control of up to 8 stages of loading for a single suc-

tion group, or up to 10 stages of loading (5 per suction group) for dual suction groups.  
For dual suction groups, the controller is applicable to both racks with a shared common dis-

charge, or independent discharge lines.  Suction pressure can be controlled to either a fixed 

setpoint, or a floating suction pressure for maximum efficiency.  
Each stage of loading can be set to: fixed speed compressor, variable speed compressor

, digi-

tal compressor

① ②

 

or unloaders.  The relays for the stages can alternatively be used to control 

a Master Liquid Line Solenoid, or as a Hot Gas Defrost Relay. 

Communication:

As is standard with many other KE2 Therm controllers, the KE2 Compressor Sequencer OEM has 

the simplest and easiest communication platform in the industry.  The controller uses standard 

communication protocols and cables; no extra software is necessary, only an Ethernet connec-

tion to the controller.  E-mail and/or text alerts can be sent out right from the controller.  Com-

plete remote access is available during startup with one simple button press and an Internet 

connection.

 

One per Suction Group

 

Controller is designed to operate with a Copeland Scroll Digital Compressor, when Digital Compressor is selected.

Part Numbers 

-  Controllers & Accessories

Part Number Description

 

KE2 Compressor Sequencer OEM

21768

Controller only

 

Aux Relay Board

21323

Auxiliary Relay Board

 

External Relays

21304

Solid State Relay - Used to control digital compressor bypass valve

21032

Used to pilot contactor for 5th compressor stage, control master liquid line 

solenoid, hot gas solenoid or unloader valve with Aux Relay Board Relay #5.

 

Pressure Transducers

20201

Pressure Transducer 0 to 150 psia, 10 ft. lead - for suction pressure. 

20204

Pressure Transducer 0 to 150 psia, 40 ft. lead - for suction pressure.

20202

Pressure Transducer 0 to 500 psig, 10 ft. lead - for discharge pressure.

20712

Pressure Transducer 0 to 500 psig, 40 ft. lead - for discharge pressure.

Temperature Sensors

21230

High temp sensor for discharge at condenser inlet, 15 ft.

20199

Standard temp sensor for all other temp inputs, 10 ft. (black)

20200

Standard temp sensor for all other temp inputs, 40 ft. (black)

Replacement Relays

21374

Replacement Form C Relay for Main Board

Replacement Fuses

21375

Replacement incoming power fuse for Main Board and Aux Relay Board

21628

Replacement fuses for Aux Relay Board relays (5 pack)

③ 

Use transducers 20208 (10 ft.) or 20711 (40 ft.) for R-410A. Use 20202 (10 ft.) or 20712 (40 ft.) for R-744.

© Copyright 2019 KE2 Therm Solutions, Inc., Washington, Missouri 63090

Q.2.60

March 2019

KE2 Compressor 

Sequencer OEM  

pn 21768

Quick Start Guide

This reference should remain on site with the installed KE2 Compressor Sequencer

Contents:

Product Summary  

Pg. 1

Part Numbers - Controllers & Accessories 

Pg. 1 

Dimensions & Specifications - Main Board 

Pg. 2

Dimensions & Specifications - Auxiliary Relay Board  

Pg. 3 

Application   

Pg. 3 

Setup Options

   

Pg. 4 

1 - Main Board Only 

  Single Suction Group w. Common Discharge    Pg. 5

2 - Main Board + 1 Aux Relay Board 

  Single Suction Group w. Common Discharge    Pg. 6-7

3 - Main Board + 2 Aux Relay Boards 

  Single Suction Group w. Common Discharge    Pg. 8-9

4 - Main Board + 2 Aux Relay Boards 

  Dual Suction Groups w. Common Discharge   Pg. 10-11

5 - Main Board + 2 Aux Relay Boards 

  Dual Suction Groups w. Independant Disch.   Pg. 12-13 

Communication Setup Options   

Pg. 14

Setting Up Groups   

Pg. 15

Designating Relay Functions   

Pg. 16 - 18 

▪ 

Single Group - Main Board Only   

 

 Single Group or Dual Group +Aux Boards 

Running the System   

Pg. 18-19

 

Determining Compresor ON/OFF Order   

Pg. 20 

 Fixed Suction Pressure w. Digital Scroll or Variable  

 

Speed Compressors

 Fixed Suction Pressure w. Fixed Speed Compressors

 Floating Suction Pressure

Selectable Inputs   

Pg. 21 

Descriptions of Selectable Input Mode Options   

Pg. 21

Remote Display   

Pg. 22 - 23 

 Variables Menu - Single Group

 Setpoints Menu - Single Group

 

 Variables Menu - Dual Group

 Setpoints Menu - Dual Group

Alarms   

Pg. 24 - 25 

 Critical & Cautionary Alarms - ALL Groups

 Safety Alarms - ALL Groups

Webpage Setpoints - Main Board  

Pg. 26 - 27

Webpage Setpoints - Auxiliary Relay Boards  

Pg. 28

Webpage Screen Shots  

Pg. 29 - 37

 Home Page

 Status Page - Main Board

 Status Page - Aux Relay Board

 Settings Page 

 Login Page

 Network Page   

 Setpoints Page - Main Board Only

 Setpoints Page - Main Board + Aux Relay Board(s)

 Graphs Page

 Alphabetical List of Abbreviations 

Pg. 38 - 40

Summary of Contents for Compressor Sequencer OEM

Page 1: ...condenser inlet 15 ft 20199 Standard temp sensor for all other temp inputs 10 ft black 20200 Standard temp sensor for all other temp inputs 40 ft black Replacement Relays 21374 Replacement Form C Rel...

Page 2: ...ssor temp room temp monitor temp hot gas defrost request 2nd pressure 2nd temp compressor module alarm high pressure safety alarm oil pres sure safety alarm system off Communication Standard TCP IP AP...

Page 3: ...stages of loading for a single suction group or up to 10 stages of loading 5 per suction group for dual suction groups For dual suction groups the discharge line can be shared between the two groups o...

Page 4: ...on Discharge Aux Relay Board 1 Aux Relay Board 2 To Condenser Oil Line Suction Header Discharge Header Option 2 KE2 Compressor Sequencer OEM 1 Aux Relay Boards Single Suction Group w Common Discharge...

Page 5: ...ELAY 3 RELAY 2 RELAY 1 STEPPER MOTOR Not Used Red Black Green Suction Pressure Transducer Line L1 Neutral L2 INCOMING POWER 120 208 230 VAC GROUND EARTH GROUND Chassis FUSE Discharge Pressure Transduc...

Page 6: ...ot Used STEPPER MOTOR Not Used Red Black Green Suction Pressure Transducer Line L1 Neutral L2 INCOMING POWER 120 208 230 VAC GROUND EARTH GROUND Chassis FUSE Discharge Pressure Transducer Green Black...

Page 7: ...AC GROUND POWER FUSE RELAY 5 External Digital Switch requires Relay pn 21032 0 10V Variable Speed OV 10V or 0V to 5V Digital Compressor Bypass Valve OV 10V requires Solid State Relay pn 21304 AUX 1 IN...

Page 8: ...D Chassis FUSE Discharge Pressure Transducer Green Black Shared Red T1AH250VP 1A 250V slow blow 5mm x 20mm A B Sh ON 1 2 3 4 5 6 7 8 Aux 1 2 3 Function Options int comp temp room temp monitor temp HG...

Page 9: ...1 2 3 4 5 6 7 8 INCOMING POWER 120 208 230VAC GROUND POWER FUSE RELAY 5 Not Used 0 10V Variable Speed OV 10V or 0V to 5V Digital Compressor Bypass Valve OV 10V requires Solid State Relay pn 21304 AUX...

Page 10: ...Transducer Green Black Shared Red T1AH250VP 1A 250V slow blow 5mm x 20mm A B Sh ON 1 2 3 4 5 6 7 8 Aux 1 2 3 Function Options int comp temp room temp monitor temp HGDef req 2nd pres 2nd temp cmp modul...

Page 11: ...p 2 Suction Pressure AUX 2 INPUT 1 ON 1 2 3 4 5 6 7 8 INCOMING POWER 120 208 230VAC GROUND POWER FUSE RELAY 5 External Digital Switch requires Relay pn 21032 0 10V Variable Speed OV 10V or 0V to 5V Di...

Page 12: ...re Transducer Green Black Shared Red T1AH250VP 1A 250V slow blow 5mm x 20mm A B Sh ON 1 2 3 4 5 6 7 8 Aux 1 2 3 Function Options int comp temp room temp monitor temp HG Def req 2nd pres 2nd temp cmp m...

Page 13: ...ays Group 1 Group 2 Suction Pressure AUX 2 INPUT 1 ON 1 2 3 4 5 6 7 8 INCOMING POWER 120 208 230VAC GROUND POWER FUSE RELAY 5 External Digital Switch requires Relay pn 21032 0 10V Variable Speed OV 10...

Page 14: ...Fi Service Tool KE2 Smart Gate RB201 1UAS 2HND IN USB SFP POE GIGABIT ETHERNET ETH1 ETH5 ETH3 ETH4 ETH2 ETH6 ETH10 ETH8 ETH9 ETH7 6 7 8 9 10 1 2 3 4 5 FAST ETHERNET Option 2 Using a KE2 Smart Gate pn...

Page 15: ...Aux Relay boards connected to the controller one or two Unas signed Aux Relay boards may appear on the screen Click on the icon under Group 1 This will load the Setpoints page for Group 1 Next click...

Page 16: ...Setpoints page of Group 1 Otherwise relays and any additional inputs are designated from the Aux Relay Board interface Single Group Main Board Only Select the function of each relay then click the Sa...

Page 17: ...Quick Start Guide Single Group Dual Group Aux Boards When using Aux Relay Boards the relays and any additional inputs can be assigned in the in terface for the Aux Relay Board From the Home Page clic...

Page 18: ...ration See pages 26 28 for detailed explanation of each Setpoint When the KE2 Compressor Sequencer OEM is started for the first time or anytime a critical setpoint is changed the controller enters Sys...

Page 19: ...the button until SA is shown Press the arrow un til SYS SY1 or SY2 is shown SYS indicates System Off when config ured for Single Group SY1 and SY2 indicate their respective groups when configured for...

Page 20: ...energizing the bypass solenoid or the variable speed compressor will be loaded by increasing the 0 10VDC output 0 5VDC also available The rate at which the Digi tal Scroll or variable speed is loaded...

Page 21: ...Internal Compressor Temperature Monitors internal compressor temperature for Copeland Digital Scroll compressors Triggers High Inter nal Compressor Temperature Alarm which turns off digital compresso...

Page 22: ...sion on the controller Remote Display Setpoints Menu Single Group When not in a menu press and hold until SA is shown Press or to go through the setpoint abbreviations Press to view the current setpoi...

Page 23: ...on Temperature as calculated by the controller dH2 Discharge Superheat Group2 Group 2 Discharge Superheat as calculated by the controller iP1 IP Octet 1 First three digits of the IP address iP2 IP Oct...

Page 24: ...g Alarm Contact KE2 Therm A26 Email Failure Alarm Email alert was not confirmed by email server provided after seven consecutive attempts A28 High Disch Temp Group 2 Alarm Group 2 discharge temperatur...

Page 25: ...dr 2 Input 2 Sensor Group 1 or Group 2 Alarm Aux Board 2 Input 2 Temp Sensor is shorted or open A59 Aux Addr 2 Input 3 Sensor Group 1 or Group 2 Alarm Aux Board 2 Input 3 Temp Sensor is shorted or ope...

Page 26: ...32 2 C 10 0 F Suc Press Diff Suction Pressure Differential when all compressor are set to fixed speed controller will load and unload stages outside of this range For digital and variable speed compr...

Page 27: ...8 C 0 0 F Min Suction SH Minimum Suction Superheat The lowest acceptable superheat for the suction line Turns system off when exceeded longer than Min Max SH Del 5 0 F to 50 0 F 2 8 C to 27 8 C 15 0...

Page 28: ...ldr for Cmp1 Unldr for Cmp2 Unldr for Cmp3 Unldr for Cmp4 Disabled Comp HP Once compressor type is selected the HP of each compressor can be set 0 1 HP to 50 0 HP 5 0 HP Digital Inputs InPUT2 MODE Sel...

Page 29: ...information Location IP address MAC address Firmware version Example of Mobile View Brings up the Status page for that Aux Relay Board Brings up the Status page for that Aux Relay Board Brings up the...

Page 30: ...on the bar to expand or collapse the view for that suction group Status of each relay Click on Suction Pressure dial to zoom in Total of compressor capacity used for the suction group Scroll down to v...

Page 31: ...e user also designates relays and determines the function of selectable inputs from this page Status Page Auxiliary Board Display the status of each Aux Relay Board input Click to set the function of...

Page 32: ...p LT Suction Group etc Single Group Single Group plus 1 Aux Single Group plus 2 Aux Dual Group Shared Discharge plus 2 Aux Dual Group Independent plus 2 Aux Site and Password may be changed by custome...

Page 33: ...from the default Once you are logged in go to the Settings page to change the User Name and Password To make changes to the Aux Relay Board the user will be prompted for the User Name and Password if...

Page 34: ...ynamic Disabled IP is Static Shows Internet connection status Red Unable to reach Internet Yellow Some Internet services unavailable Green Good Inernet connection NOTE Do not modify the Controller Nam...

Page 35: ...s the input function Input 1 2 or 3 Mode Disabled In Cmp Temp Room Temp Monitor HG Defr Req 2nd Pres 2nd Tmp Comp Module Hi Pres Safety Oil Safety Sys Off Selectable Inputs Relay 1 Dropdown Options Di...

Page 36: ...ints page Setpoints Page Main Board Aux Relay Board s Input 1 2 or 3 Mode Disabled In Cmp Temp Room Temp Monitor HG Defr Req 2nd Pres 2nd Tmp Comp Module Hi Pres Safety Oil Safety Sys Off Selectable I...

Page 37: ...ontroller to a CSV file Date and Time are pulled from the connected computer Days Ago Capacity Load and Suction Pressure are displayed when moving the mouse over the data Days ago Description The Grap...

Page 38: ...seven consecutive attempts A28 A28 High Disch Temp Group 2 Alarm Alarm Critical Group 2 discharge temperature is higher than Max Disch Temp for longer than Max Dis Tmp Del A29 A29 Evap Comms Group 1...

Page 39: ...ture as read by the controller dt1 dt1 Discharge Temperature Group1 Variables Dual Group Group 1 Discharge Temperature as read by the controller dt2 dt2 Discharge Temperature Group2 Variables Dual Gro...

Page 40: ...ted Suction Temperature as calculated by the controller SAt SAt Saturation Temperature Variables Single group Saturated Suction Temperature as calculated by the controller SH1 SH1 Superheat Group1 Var...

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