Keeprite KLC Installation Manual

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.

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

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