LLC8 Series Liquid Level Controls Features:

Liquid Level Controls
LLC8 Series
The LLC8 Series is a low cost, single-probe
conductive liquid level control designed for low
liquid level cutoff protection. It offers a factory
fixed time delay of 1 - 60s and is available for input
voltages of 24, 120, or 230VAC. LED indicator
illuminates whenever the LLC8’s isolated, 10A,
SPDT output relay is energized. Sense resistance
is fixed from 5K - 250KΩ. Available with manual/
automatic reset or a special manual reset with a
power outage feature that auto resets the unit when
power is restored and the water level is acceptable.
24 and 120VAC units are UL recognized as limit
switches under UL353 (230VAC units are UL 508)
and CSA certified under Standard 14.
For more information see:
Appendix B, page 167, Figure 28 for dimensional drawing.
Appendix C, page 170, Figure 25 for connection diagram.
Operation
Automatic Reset (Reset switch not connected): When liquid rises to low level cutoff probe, output relay and
LED indicator energize. When liquid falls below the low level cutoff probe, the output relay and LED indicator
de-energize after a fixed time delay.
Manual Reset (Reset switch connected): When the liquid level falls below low level probe, the output relay and
LED de-energize after a fixed time delay. When the liquid level rises to low level probe, the output relay and
LED indicator remain de-energized until the NC manual reset switch is opened; then they energize immediately.
Power Outage Manual Reset (Reset switch connected): A power outage causes the output relay and LED
indicator to de-energize. Upon restoration of power, if the liquid is touching the low level probe, the output
relay and LED indicator will re-energize. If the liquid level is below the low level probe, the output relay and
LED indicator remain de-energized until the NC reset switch is opened.
Order Table:
LLC8
X
Input
─2 - 24VAC
─4 - 120VAC
─6 - 230VAC
X
TimeDelay(fixed)
─Specify fixed delay
in seconds (1-60) in 1s
increments
X
Sense Resistance
─F - Fixed (Specify
fixed resistance in
kilohms (5-250)
in 1K increments .)
Features:
• Designed for low level cutoff protection
• Energized on wet probe
• Fixed time delay 1 - 60s
• Fixed sense resistance of 5K - 250KΩ
• 24, 120, or 230VAC input voltages available
• Isolated, 10A, SPDT output contacts
Approvals:
Auxiliary Products:
• Quick connect t o s crew ad aptor:
P/N: P1015-18
• Electrode: P/N: PHST-38QTN
• Threaded probe (24”): P/N: LLP-24
• Female quick connect:
P/N: P1015-13 (AWG 10/12)
P/N: P1015-64 (AWG 14/16)
P/N: P1015-14 (AWG 18/22)
Available Models:
LLC825F5M
LLC843F10M
LLC843F10P
LLC843F26M
LLC843F26P
LLC845F25P
LLC8610F12M
If desired part number is not listed, please call us to
see if it is technically possible to build .
X
Reset
─M - Manual/Automatic
Reset
─P - Power outage
manual reset
Specifications
Control
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sense Voltage . . . . . . . . . . . . . . . . . . . . . . . . .
Sense Resistance . . . . . . . . . . . . . . . . . . . . . . .
Sense Resistance Tolerance . . . . . . . . . . . . .
Time Delay
Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repeat Accuracy . . . . . . . . . . . . . . . . . . . . . .
Time Delay vs Temp. & Voltage . . . . . . . . .
Power Outage Reset Delay . . . . . . . . . . . . . .
Input
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tolerance
24VAC . . . .
120 or 230VAC . . . . .
AC Line Frequency . . . . . . . . . . . . . . . . . . . .
Output
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
134
Resistance sensing for conductive liquids with time delay
12VAC nominal at probe terminals
Fixed 5K - 250KΩ
±10%
±20%
±10%
±10%
≤1s
24, 120, or 230VAC
-15% - 20%
-20% - 10%
50/60 Hz
Protection
Surge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IEEE C62.41-1991 Level A
Isolation Voltage . . . . . . . . . . . . . . . . . . . . . . ≥ 2500V RMS input to output terminals
Mechanical
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 in. (12.7 mm) x .187 (4.76 mm) dia.
nylon standoffs (3)
Termination
Electrical . . . . . . 0.25 in. (6.35 mm) male quick connect
terminals
Reset Switch & Probe(s) . . . . . . 0.187 x 0.03 in. (4.75 x 0.76 mm) male quick
connect terminals
Environmental
Operating / Storage Temperature . . . . . . . -40° to 60°C / -40° to 80°C
Coating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Printed circuit board is conformal coated
to resist moisture & corrosion
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95% relative, non-condensing
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≅ 5 oz (141.7 g)
Electromechanical relay
Isolated SPDT
10A resistive @ 120/240VAC; 1/4 hp @ 125VAC;
1/2 hp @ 250VAC
www.ssac.com • 800-843-8848 • fax: 605-348-5685
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

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