Page 1
PRODUCT DATA &
INSTALLATION
Bulletin K40-KLC-PDI-3
1068825
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Lead Lag
Control Panel
Model KLC
Electrical Power: 115/1/60,
208-230/1/60,
200-220/1/50
• For use on TWO independent refrigeration
systems using pumpdown control mode.
(Thermostat wired into liquid line solenoid valve).
NOMENCLATURE
KLC 1 - I S2 A
Model
KeepRite Lead Lag
Control Panel
Model Code
1 = Standard
2 = With Alarm/Auto Back-Up
Application
I = Indoor
• Panel can be mounted at condensing unit on indoor
installations or can be mounted remote inside on a
wall when used with outdoor condensing units.
• Designed to alternate each system automatically
at a preset 24 hour time period. (can be readjusted
from a 6 to 300 hour time period).
Three position toggle switch provides:
1. Condensing Unit #1 runs only.
2. Lead Lag mode. (alternates unit #1 and unit #2
automatically).
3. Condensing unit #2 runs only.
• KLC1 model offers low cost simple operation by
automatically (pre-set time) or manually alternating
each unit.
• KLC2 model offers the same as KLC1 and includes
supplemental refrigeration backup during abnormal
load situations or in the event one refrigeration
system fails. (Includes alarm dry contacts)
Voltage
S1 = 115/1/60
S2 = 208-230/1/60
S6 = 200-220/1/50
Series / Generation
A = 1st Generation
• Panel is suitable for use with Air, Electric and Hot
Gas defrost systems.
Page 2
KLC
TYPICAL SYSTEM LEAD-LAG WIRING
LOW PR.
CONTROL
COMPR
CONT.
LEAD
REFER TO ACTUAL
CONDENSING UNIT
WIRING DIAGRAM ON
UNIT CONTROL PANEL
L1 L2 GND
LEAD
LAG
CONTROL
PANEL
R1 R2
C1
CLOCK
WITH KLC2
AUTO
BACK-UP
THERMOSTAT
ALARM
DRY CONTACT
CIRCUIT
CONT.
LIQUID
FANDEFR.
CONT.
FAN DELAY/
DEFROST TERM.
THERMOSTAT
SOLENOID
TYPICAL
SYSTEM #1
LINE
THERMOSTAT
(LEAD)
COMPR
CONT.
COMPR
CONDENSING UNIT
SPACE
DEFROST HEATERS
LOW PR.
CONTROL
EVAPORATOR
LAG
C2
CLOCK
DEFR.
CONT.
LIQUID
FAN
CONT.
FAN DELAY/
DEFROST TERM.
THERMOSTAT
SOLENOID
TYPICAL
SYSTEM #2
- 2 -
LINE
THERMOSTAT
(LAG)
COMPR
CONDENSING UNIT
SPACE
EVAPORATOR
DEFROST HEATERS
Page 3
KLC
KLC1 PANEL WIRING
CONTROL PANEL WIRING DIAGRAM: 230-1-60 Hz
TO 208/230-1-60 OR
200/220-1-50 POWER SUPPLY
L2
L1
15A
FUSE
CLASS CC
RD #1
LEAD-LAG
R3
1 4
RD #3
TIMER
RD #5
SET: B MODE
RD #6
LEAD
HRS UNIT
24 (0-30 RANGE)
10
1
3
AUTO
6
TOGGLE
DPDT
SWITCH*
(BOTTOM VIEW)
T1
T
4 5
BL 26
RD #4
21
LAG
RD 13
6
BL #22
2
RD #7
4
RD #8
RD #9
3
RD #10
RD #11
RD #12
LEAD-LAG CONTROL PANEL-
STANDARD BASIC PANEL
230V CONTROL CIRCUIT
CONTROL PANEL
COMPONENT LAYOUT
LEAD LAGAUTO
MODE SWITCH
LAGAUTO
TIMER OVERRIDE
RELAY
R3
LAG
RELAY
R2
FUSES
T1
TIMER
LEAD
RELAY
BL #21
R1
2
7
R1
2
R2
BL #23
7
*
LEAD
MODE SWITCH
BL #24BL #25
2
R3
7
(TOP VIEW)
2
1 3
5
4 6
R1
C1
LEAD TIMECLOCK
CONTACTOR
COIL
(AT COND UNIT #1)
R2
C2
LAG TIMECLOCK
CONTACTOR
COIL
(AT COND UNIT #2)
- 3 -
NOTES
1. USE COPPER CONDUCTORS ONLY
2. USE 90°C WIRE (OR HIGHER)
3. OPTIONAL COMPONENT MAY BE FACTORY
INSTALLED OR SUPPLIED BY OTHERS
4. HEATER LOADS ARE NOT CONCURRENT
WITH REFRIGERATION LOADS.
5. OVERCURRENT PROTECTION FOR EACH
EVAPORATOR MUST NOT EXCEED MAXIMUM
VALUE SHOWN ON EVAPORATOR NAMEPLATES.
6. MAY BE FACTORY INSTALLED-MOUNTED
AND WIRED ON EVAPORATOR
(PRE-ASSEMBLED MODELS).
ON MULTIPLE PRE-ASSEMBLED EVAPORATORS
WIRE SECOND EVAPORATOR SOLENOID IN
PARALLEL WITH FIRST.
7. ALL FUSES TO BE CLASS CC OR J AND
VOLTAGE RATED EQUAL (OR HIGHER) THAN
OPERATING VOLTAGE.
CONDUCTORS/WIRNG
G=GREEN RD=RED BL=BLUE ALL OTHER BLACK
ALL FIELD WIRING MUST BE DONE IN
COMPLIANCE WITH ALL APPLICABLE LOCAL
AND NATIONAL CODES.
DATE:
Feb7/07
FACTORY WIRING
WIRING BY OTHERS
OPTIONAL COMPONENT WIRING
(SOME OPTIONAL COMPONENTS
MAY BE FACTORY WIRED.)
DIAGRAM NUMBER
CPB-S2-TLC1
Page 4
KLC
KLC 2 PANEL WIRING
200/220-1-50 POWER SUPPLY
L1
15A
FUSE
CLASS CC
T1
LEAD-LAG
R3
1 4
RD #3
RD #1
CONTROL PANEL WIRING DIAGRAM: 230-1-60 Hz
TO 208/230-1-60 OR
L2
TIMER
RD #5
SET: B MODE
RD #6
LEAD
HRS UNIT
24 (0-30 RANGE)
10
1
3
AUTO
6
DPDT
(BOTTOM VIEW)
T
4 5
TOGGLE
SWITCH*
BL 26
RD #4
LAG
6
BL #22
2
RD #7
RD #10
RD #11
RD #12
RD #8
RD #9
2
2
2
4
3
21
RD 13
LEAD-LAG CONTROL PANEL-
THERMOSTAT-AUTO BACK UP
LOCATE IN FREEZER/COOLER AWAY FROM DOOR
RD 32
BL 33
RD 31
BL #21
R1
R2
R3
RD 27
7
BL #23
7
7
RD 28
BL #24BL #25
*
LEAD
MODE SWITCH
(TOP VIEW)
2
5
R4
1 3
8 6
1
4 6
RD 30
LAGAUTO
3
(SHIPPED LOOSE)
SUGGESTED SETTING:
FOR FREEZER +10F CUT-IN
FOR COOLER +50F CUT-IN
RE-ADJUST TO SUIT FIELD REQUIREMENTS.
NOTE: IF ROOM DOES NOT LOWER IN TEMP (THERMOSTAT STAYS CLOSED)
6
5
RD 35
WITHIN 45 MINUTES (OR AS ADJUSTED) ALARM WILL ACTIVATE.
RD 34
SUGGESTED SETTING:
45 MINUTE TIME DELAY
RE-ADJUST TO SUIT FIELD REQUIREMENTS.
TIMER
ALARM
RD 36
RD 37
SET: A MODE
HRS.. UNIT
0.75 (0-3 RANGE)
T2
WITH ALARM AND AUTO BACK UP.
230V CONTROL CIRCUIT
10
T
1
RD 35
POWER
LAMP
GRN
BL 42
BL 38
RD 40
RD 41
WARNING
BL 38A
RD 39
2
AUTO BACK UP
2
ALARM
RED
ALARM
RELAY
RELAY
LAMP
AMB
LAMP
R4
BL 43
BL 44
7
R5
BL 45
7
6
2
4
3
POWER
WARNING
ALARM
R1
1
3 6
1
C1
LEAD TIMECLOCK
CONTACTOR
COIL
(AT COND UNIT #1)
COMPONENT LAYOUT
LAMPS
GRN
AMB
RED
TIMER
LEAD
RELAY
R1
8
2
CONTROL PANEL
FUSES
T1
LAG
RELAY
R2
T2
TIMER
1
SWITCH
RELAY
R3
TERM STRIP
2
3
LEAD LAGAUTO
R2
1
3 6
3
C2
LAG TIMECLOCK
CONTACTOR
COIL
(AT COND UNIT #2)
6
7
5
4
MODE SWITCH
BACK UP
ALARM
RELAY
RELAY
R5
R4
8
4
NOTES
1. USE COPPER CONDUCTORS ONLY
2. USE 90°C WIRE (OR HIGHER)
3. OPTIONAL COMPONENT MAY BE FACTORY
INSTALLED OR SUPPLIED BY OTHERS
TO REMOTE ALARM CIRCUIT
(BY OTHERS)
N.O. DRY CONTACT
WILL CLOSE DURING ALARM
8
8
7
R5
YL
1 3
N.O. DRY CONTACT
(10A RATING 230v MAX.)
*
*
NOTE: FOR N.C. DRY CONTACT
(WILL OPEN DURING ALARM)
RE-WIRE TO R5 RELAY TERM 4
1 4
ALARM
RELAY
YL
*
*
*
*
4. HEATER LOADS ARE NOT CONCURRENT
WITH REFRIGERATION LOADS.
5. OVERCURRENT PROTECTION FOR EACH
EVAPORATOR MUST NOT EXCEED MAXIMUM
VALUE SHOWN ON EVAPORATOR NAMEPLATES.
6. MAY BE FACTORY INSTALLED-MOUNTED
AND WIRED ON EVAPORATOR
(PRE-ASSEMBLED MODELS).
ON MULTIPLE PRE-ASSEMBLED EVAPORATORS
WIRE SECOND EVAPORATOR SOLENOID IN
PARALLEL WITH FIRST.
7. ALL FUSES TO BE CLASS CC OR J AND
VOLTAGE RATED EQUAL (OR HIGHER) THAN
OPERATING VOLTAGE.
CONDUCTORS/WIRNG
G=GREEN RD=RED BL=BLUE ALL OTHER BLACK
ALL FIELD WIRING MUST BE DONE IN
COMPLIANCE WITH ALL APPLICABLE LOCAL
AND NATIONAL CODES.
DATE:
FEB 7A/07
FACTORY WIRING
WIRING BY OTHERS
OPTIONAL COMPONENT WIRING
(SOME OPTIONAL COMPONENTS
MAY BE FACTORY WIRED.)
DIAGRAM NUMBER
CPB-S2-TLC2
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Page 5
SERVICE PARTS LIST (50/60Hz)
KLC
KLC1 & KLC2
DESCRIPTION 120V 230V
Timeclock power Contactors (C1, C2) 1043345 1049602
Lead-Lag Timer (Dual volt/Freq) - T1 1065232 1065232
11 Pin Socket Base 1065233 1065233
Control Relay (R3) 1047767 104534
8 pin Socket Base 1062258 1062258
Lead / Lag Relay (R1, R2) 1043345 1049602
3 Position Toggle Switch 1067407 1067407
KLC2 ONLY
DESCRIPTION 120V 230V
Lead-Lag Timer (Dual volt/Freq) - T2 1065232 1065232
Control Relay (R4, R5)
Alarm Temperature Control
Lamp - Red
Lamp - Green
Lamp - Amber
1047767 104534
1085500 1085500
1090031 1090273
1090032 1090274
1090033 1090275
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Page 6
NOTES
- 6 -
Page 7
NOTES
- 7 -
Page 8
R
T
E
E
T
K
N
I
NATIONAL REFRIGERATION &
AIR CONDITIONING CANADA CORP.
CANADA
159 ROY BLVD., BRANTFORD, ONTARIO, CANADA N3R 7K1
PHONE: 1-800-463-9517 (519)751-0444 FAX (519)753-1140
Due to National Refrigeration’s policy of continuous product improvement, we reserve the right to make changes without notice.
USA
985 WHEELER WAY, LANGHORNE, PA. 19047 USA
PHONE:1-888-KEEPUS1 OR 1-888-533-7871
c us
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