Warrick a Brand of Gems Sensors Series 26 Low Water Cutoff Catalog Page
WARRICK CONDUCTIVITY SENSORS
Series 26
Low Water Cutoff – Standoff Mount
Meets CSD1 Requirements Snap-Thru Standoff Mounting
Non Powered Contacts Compact Size
Time Delays Available Power Outage Feature
LED Monitoring U.L. “Limit Control”
Test Feature
AC Current Minimizes Electrolysis
Series 26 – General Purpose Control
Designed for boiler low-water cutoff protection. A snap-through standoff mounting
device is available for Series 26 units. Optional Power Outage feature resets after
nuisance outages. Optional reset button is used when device has been deactivated
because of low water condition. Reset is functional only if water has returned to
normal level. Optional Test Feature available allows LLCO circuit to be tested without
draining the water level in the boiler. Built-in 3 second time delay is standard. Up to 90
seconds available for increasing and decreasing levels.
Specifications
Contact Design 1 N.O. & 1 N.C. (1 form C)
Contact Rating 10 amp Resistive 1/3 hp at 120, 240 VAC
Mode of Operation Direct
Sensitivity 0-100K ohm, factory set
Primary Voltage 120 VAC, 240 VAC1, 24 VAC, 208/240 VAC (+10%/-15%) 50/60 Hz
Secondary Voltage 12 VAC, 1.5 mA
Temperature -40°F to +150°F (-40°C to +65°C)
Approvals1 U.L. 353, U.L. 508 File # MP1430
Terminal Style Spade connection
Options Time Delays, Power Outage, Retrofit Plate, Test Feature,
See page E-11 for descriptions
Notes:
1. 240 VAC and 208/240 VAC are not U.L. recognized
LOW WATER CUTOFF
Applications
• Low-Water Cutoff • Single-Level Service
• Point Level • Alarms
• Valve Control • Pump Control
Dimensions
How to Order
Use the Bold characters from the chart below to construct a product code.
26 X X X X X XX XX
1. Series
26 General Purpose;
2. Sensitivity
A 4.7K; B 10K; C 26K; D 50K; E 100K
3. Supply Voltage
1 120 VAC; 2 240 VAC; 3 24 VAC; 8 208/240 VAC
4. Standoff Style
A 1/16˝ Panel; B 1/8˝ Panel; C Screw mount; D Retrofit
5. Enclosure
0 None; 1 NEMA 11; 4 NEMA 4
6. Option Package
See page E-11, Chart B for code letter
7. Time Delay (decreasing level) Option
03-90 seconds; Blank 3 seconds
8. Time Delay (increasing level) Option
00-90 seconds; Blank 0 seconds
Notes:
1. Standoff Style D only.
Socket Details and Option Availability
are located on web site.
1
Wiring
A.C. SUPPLY
L1 L2
TRANSFORMER
LLCO
1
RESET
RESET BUTTON
OPTIONAL
LOW LEVEL CUTOFF PROBE
G
NC
C
NO
REFERENCE PROBE
TANK, IF METALLIC,
MAY BE USED
IN PLACE OF
REFERENCE PROBE.
E-8
Optional Character Reference – 16, 26 and DF Series Only
Manual Reset
Available on Series 26, 26M and DF controls
(Normally closed pushbutton across reset terminals. Pushbutton ordered separately):
Manual reset only applies to the function associated with terminal LLCO. When the
liquid rises to the electrode on terminal LLCO, the control will remain de-energized
(load contacts in original state) until the pushbutton is depressed. The control will
then energize, (LED will be lit) changing the state of the contacts. The control
remains energized until the liquid level recedes below electrode on terminal LLCO.
The control then de-energizes, (LED will go off) returning load contacts to their
original state. Unless otherwise specified, there is a three second time delay on
decreasing level. Liquid must be below probe on terminal LLCO for full three seconds
before control de-energizes.
Manual Reset with Power Outage Feature
Available on Series 26, 26M, and DF controls
Reset (Normally closed pushbutton across reset terminals. Pushbutton ordered
separately) Control will ignore power loss to control. With liquid in contact with
electrode on terminal LLCO, a power outage will cause the control to de-energize, but
will automatically energize upon return of power. However, loss of liquid will cause
control to de-energize and remain so until liquid again rises
to electrode and pushbutton is depressed.
Time Delays Associated with Terminals H and L
WARRICK CONDUCTIVITY SENSORS
Available on Series 16, 16M, and DF controls
With time delay on increasing level, the liquid must be in contact with the high
electrode for the full duration of the time delay before control will operate. With delay
on decreasing level, the liquid must be below the low electrode for the full duration
of the time delay before control will operate. In single level service, terminals 3 and 4
must be jumpered together to achieve time delays on both increasing and decreasing
levels or just decreasing level.
Chart A – Time Out Option
Optional
Character
K
L
M
N
P
Q
Time Out (in seconds)
30 60 90 120 150 180
•
•
•
•
•
•
Time Delays Associated with Terminal LLCO
Available on Series 26, 26M, and DF controls
3 Second time delay on decreasing level is standard. Delay
up to 90 seconds, can be specified and would act in the same
manner as listed above.
Time Out Option
Available on Series 16, 16M, and DF controls
The latching circuit for the high and low electrode has
an optional timer. In some applications the High or Low
electrode may become short circuited or disconnected. Such
an occurrence may potentially over fill in fill applications,
or cause the pump to run dry in pump down applications.
The time option is custom programmed up to 3 minutes.
When a fault condition occurs, the FILL LED will have a blink
sequence of .5 seconds on 2 seconds off. See Chart A for
time delay options.
Test Feature
Available on Series 26, 26M, and DF controls
Allows LLCO circuit to be tested. Holding down the reset
button for 3 seconds will allow the LLCO circuit to trip which
simulates the loss of water, without the need of draining
the water level in the boiler. The control will return to normal
operation once the reset button is pressed a second
time. (Test feature option only available with the manual reset
function.)
E-11
Visit www.GemsSensors.com for most current information.
Chart B – Optional Character Information
Option Components
Control Series
Test
DF "LLCO" D
26, 26M, 26NM C
26, 26M, 26NM E
16, 16D, 26, DF R
DF "LLCO" S
DF "LLCO" K
DF W
26, 26M, 26NM,
DF"LLCO"
26, 26M, 26NM F
26 N
DF "LLCO" G
DF T
26, 26M, 26NM,
DF"LLCO"
DF L
26, 26M, 26NM,
DF"LLCO"
26 P
DF J
26, 26M, 26NM,
DF"LLCO"
16, 26, DF Reference / p1of1/ 3-APR-14
Function
Normally
Closed
Pushbutton*
Power
Outage
Retrofit
Plate
Feature
•
• •
• •
• •
• •
• •
• •
• •
• • •
• • •
• • •
• • •
• • •
• • •
• • •
• • • •
• • • •
• • • •
No options X
* N.C. pushbutton when purchased in conjunction with open control must be remotely
mounted by customer
Optional
CharacterReset
B
Y
Z
A
Loading...