Q.2.43 April 2018
Page 5
KE2 Compressor
Sequencer
Quick Start Guide
© Copyright 2018 KE2 Therm Solutions, Inc., Washington, Missouri 63090
Setpoints
Setpoint
Description
Range / Options
Default
Fr
ont of Contr
oller
These can be ac
cessed fr
om fr
on
t of
con
tr
oller
. A
ll other setpoin
ts ar
e ac
-
cessed on the c
on
tr
oller
’s w
eb page
.
SuCTION PRESSuRE
Suction Pressure setpoint to cycle the compressors
Min 0 psig
Most refrigerants: 150 psia; R410A: 300 psig
R744: 500 psig
250 psig for
R-744, 25 psig
for all else
CuT OuT PRESSuRE
When below the cut out pressure, system turns off
Min 0 psig
Most refrigerants: 150 psia; R410A: 300 psig
R744: 500 psig
5 psig
2ND SuCTION
PRESSuRE
When enabled w. digital input (short across terminals),
will control fans to run at this pressure, overriding nor-
mal operation until short removed from digital input
Min 0 psig
Most refrigerants: 150 psia; R410A: 300 psig
R744: 500 psig
50 psig
TEmP uNITS
Temperature Units
Fahrenheit, Celsius
Fahrenheit
SuC PRESS DIFF
Suction Pressure Differential
0.1 to 5.0 psi
2.0 psi
REFRIgERANT
Type of refrigerant being used in the system.
R404A, R507, R407A,R407C, R422A, R422D,
R134A, R22, R717, R438A, R408A, R409A, R407F,
R410A, R744, R448A, R450A, R513A
404A
Rela
ys
RELAy#1
Relay controls the 1st stage
HG Defr Relay, LLS, Digital Comp*, Fixed Speed,
Unloader for Cmp 2, Unloader for Cmp 3,
Unloader for Cmp 4, Unloader for Cmp 5
Disabled
RELAy#2
Relay controls the 2nd stage
HG Defr Relay, LLS, Digital Comp*, Fixed Speed,
Unloader for Cmp 1, Unloader for Cmp 3,
Unloader for Cmp 4, Unloader for Cmp 5
Disabled
RELAy#3
Relay controls the 3rd stage
HG Defr Relay, LLS, Digital Comp*, Fixed Speed,
Unloader for Cmp 1, Unloader for Cmp 2,
Unloader for Cmp 4, Unloader for Cmp 5
Disabled
RELAy#4
Relay controls the 4th stage
HG Defr Relay, LLS, Digital Comp*, Fixed Speed,
Unloader for Cmp 1, Unloader for Cmp 2,
Unloader for Cmp 3, Unloader for Cmp 5
Disabled
RELAy#5
Relay controls the 5th stage
HG Defr Relay, LLS, Digital Comp*, Fixed Speed,
Unloader for Cmp 1, Unloader for Cmp 2,
Unloader for Cmp 3, Unloader for Cmp 4
Disabled
* Only one digital compressor Digital Comp ON/OFF requires a solid state relay
COmP HP PER RELAy
labels the HP of each compressor
0.1 to 50 HP
None
Defr
os
t
Load
mAx LOAD
Maximum circuit concurrent load
6,000,000 Btu
15,000 Amps
0
uNITS
Units for heater load input
Btu/Amps
Amps
Refriger
ation
SuCTION PRESSuRE
(Also available from the front of
the controller.)
Target Suction Pressure - Setpoint to cycle the com-
pressors
Min 0 psig
Most refrigerants: 150 psia; R410A: 300 psig
R744: 500 psig
250 psig for
R-744, 25 psig
for all else
REFRIgERANT
(Also available from the front of
the controller.)
Type of refrigerant being used in the system.
R404A, R507, R407A,R407C, R422A, R422D,
R134A, R22, R717, R438A, R408A, R409A,
R407F, R410A, R744, R448A, R450A, R513A
404A
mIN COmP RuN TImE
Min. run time to keep any compressor relay energized 0 to 240 seconds
60 seconds
mIN COmP OFF TImE
Minimum off time to keep any compressor relay de-
energized
0 to 240 seconds
60 seconds
mIN COmP SWITCH TImE Min. time between switching compressor on or off
0 to 240 seconds
15 seconds
2ND SuCTION
PRESSuRE
(Also available
from the front of the controller.)
When enabled w. digital input (short across terminals),
controls fans to run at this pressure, overriding normal
operation until short removed from digital input
Min 0 psig
Most refrigerants: 150 psia ; R410A: 300 psig
R744: 500 psig
50 psig
CuT OuT PRESSuRE
(Also available from the front of
the controller.)
When below the cut out pressure, system turns off
Min 0 psig
Most refrigerants: 150 psia; R410A: 300 psig
R744: 500 psig
5 psig
mAx PumP OuT TImE
Sets time limit to reach cut out pressure
0 to 240 minutes
2 minutes
Aux TEmP TyPE
Options for using the auxiliary temperature sensor
Off (Disabled) /monitor/2nd liquid
temperature for circuit #2
Disabled
TEmP uNITS
Temperature Units (can also be accessed from front of
the controller)
Fahrenheit, Celsius
Fahrenheit
mIN SAFETy SuC SH
Safety for Minimum Suction Superheat
0 to 50ºF / 0 to 27.8K
0ºF / 0K
mAx SAFETy SuC TmP
Safety for Maximum Suction Temperature
5 to 90ºF / -15 to 32ºC
90º F /
32ºC
mAx SAFETy PRESSuRE Safety for Maximum Pressure - when
exceeded sends Alerts
0 to 500 psig
400 psig
