Gems Sensors & Controls | One Cowles Road | Plainville, CT 06062-1198
Telephone: 1-800-378-1600 | Email: [email protected] | www.GemsSensors.com
Operation
26MXXXXX-XX-XX
AUTOMATIC RESET (Reset Switch terminals not wired)
When the liquid rises to the electrode on terminal LLCO, the
control energizes, changing state of the load contacts. (LED
will be lit) The control remains energized until the liquid
level recedes below electrode on terminal LLCO. The con-
trol then de-energizes, (LED will not be lit) returning load
contacts to original state. Unless otherwise specified, there
is a three second time delay on decreasing level. Liquid
must be below probe on terminal LLCO for a full three sec-
onds before control de-energizes.
MANUAL RESET (Normally closed pushbutton installed
across reset terminals) When the liquid rises to the elec-
trode on terminal LLCO, the control will remain de-
energized until the pushbutton is depressed. Upon Reset
Switch activation, the control will 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 not
be lit) 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.
Operator to wait 5 full seconds after power is applied before
pressing reset switch (if manual reset is used).
MANUAL RESET OPTIONAL POWER OUTAGE FEA-
TURE (Normally closed pushbutton across reset terminals)
Control will auto-recover from a power loss. With liquid pre-
sent on LLCO electrode at a power outage event, the con-
trol will de-energize and will automatically re-energize upon
return of power with liquid present on the probe at power-
up. However, if loss of liquid is sensed on power-up, the
control will remain de-energized until liquid again rises to
electrode and pushbutton is depressed. The control will not
attempt to auto-recover from a power outage if no liquid
was present on the probe at power loss.
TEST FEATURE
Allows LLCO circuit to be tested without the need to drop
the water level in the boiler to create a dry probe condition.
Holding down the reset button for 3 seconds will allow the
LLCO circuit to trip, simulating a dry probe. The controller
will return to normal operation once the reset button is
pressed a second time.
LED STATUS INDICATOR In normal operation, the LED
on the control will either be on or off depending on the
controller state. On-board microprocessors continuously
monitor for fault conditions. In the event a fault is detected,
the LED will blink a pattern indicating the fault type. If you
experience an inoperable control and the LED is blinking,
attempt to leave the control in the blinking state and con-
tact the factory for assistance.
Time Delay Increasing Level: 0-90
seconds, Blank = 0 seconds.
Time Delay Decreasing Level: 0-90
seconds, Blank = 3 seconds.
Optional Character: see Chart
Enclosure: 0-None, 1-NEMA 1, 2-
NEMA 4
Socket Style: A-11 Pin Octal, B-Din
Mount, M-NONE, Module Only
Supply Voltage: 1-120VAC (+10%/
-15%), 2-240VAC (+10%/-15%), 3-
24VAC (+10%/-15%), 5-220VAC
(+10%/-15%), 8-208/240VAC (187
to 242 VAC absolute Range)
Mode/Sensitivity: A-4.7K, B-10K,
C-26K, D-50K, E-100K
N.C.
Pushbutton
Power
Outage
Test
Feature
A
X
X
X
B
X
C
X
E
X
F
X
X
Y
X
X
Z
X
X
0
No Option
Wiring Diagram
