Form 260
Bulletin P/N 100203-1
Rev. M
Warrick® Series 26 Control
Installation and Operation Bulletin
This bulletin should be used by experienced personnel as a guide to the installation of Series 26 Controls. Selec-
tion or installation of equipment should always be accompanied by competent technical assistance. We encour-
age you to contact Gems Sensors or a representative if further information is required.
Specifications Installation
Control Design: Open-board design (no housing)
1. Drill three 0.187” holes in customer supplied
Contact Design: Level Control -1 SPDT (1 form C), dry back plate using stick on template supplied
contacts with control. Standard standoffs are designed
Contact Ratings: 10A @120/220/240-VAC resistive (120° for back plate thicknesses of 0.062 (1/16").
F),1A @ 120, 208/240, 240 resistive (150°F), 1/3 Hp @ Standoffs are available for back plates of 0.125
120, 208/240, 240 VAC (1/8") nominal thickness. If retrofit plate stand-
Contact Life: Mechanical -5 million operations offs are used, drill 5 (five) 0.250 dia. Holes in
Electrical -100,000 operations minimum at rated load proper locations.
2. Install five standoffs into back plate. Install two
Supply Voltage: 24, 120, 220, or 240 VAC models,+10%/ support standoffs into circuit board. CAUTION:
-15%, 50/60 Hz. 208/240 Model: 187V Min to 242V Max, Be careful not to bend or flex the circuit board
VAC 50/60 Hz during installation as this can damage the con-
Power Consumption: 24/120/208/220/240-VAC with both trol. Do not push down on transformer or relays
relays energized ~ 4.4 VA. during installation. Install circuit board onto
Secondary Circuit: 2.3 VAC RMS voltage on probes, standoffs by gently pushing down on circuit
< 1 milliampere source capability. board at board edges near standoff locations
Sensitivity: Factory programmed to 4.7K, 10K, 26K, 50K, until board is fully seated. See sketch for prop-
or 100K Ohms. er installation. Install control in appropriate en-
closure.
Operating Ambient Temperature Range: -40°F to +150°F 3. Wire controls per wiring diagram, following
(-40°C to +65°C) N.E.C. and local codes. Use appropriately
Terminals: Probe connections 3/16" male quick connects, sized spade terminals.
Line and Power connections 1/4" male quick connects
Time Delays: Standard, 0.5 seconds rising level, LLCO
probe, 3 seconds lowering level.
Listings: Control carries U.L. Limit Control Listing (UL-
353) for supply voltages of 120-VAC and below.
Dimensional Drawing Standoff Options
There are 5 standoff styles offered by Gems to
connect circuit boards to panels.
Wiring Diagram
Operation
AUTOMATIC RESET (Reset Switch terminals not wired) LED STATUS INDICATOR In normal operation, the LED
When the liquid rises to the electrode on terminal LLCO, the on the control will either be on or off depending on the
control energizes, changing state of the load contacts. (LED controller state. On-board microprocessors continuously
will be lit) The control remains energized until the liquid monitor for fault conditions. In the event a fault is detected,
level recedes below electrode on terminal LLCO. The con- the LED will blink a pattern indicating the fault type. If you
trol then de-energizes, (LED will not be lit) returning load experience an inoperable control and the LED is blinking,
contacts to original state. Unless otherwise specified, there attempt to leave the control in the blinking state and con-
is a three second time delay on decreasing level. Liquid tact the factory for assistance.
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) 26 XXX-X-X-XX
changing the state of the contacts. The control remains
energized until the liquid level recedes below electrode on Time Delay: (Decreasing Level)
terminal LLCO. The control then de-energizes, (LED will not LLCO level function 3 sec. stand-
be lit) returning load contacts to their original state. Unless ard.
otherwise specified, there is a three second time delay on Optional Character: see Chart
decreasing level. Liquid must be below probe on terminal Enclosure: 0-none, 1-NEMA 1, 4-
LLCO for full three seconds before control de-energizes. NEMA 4, 7-NEMA 7, 12-NEMA
Operator to wait 5 full seconds after power is applied before Standoff Style: A-1/16” panel,
pressing reset switch (if manual reset is used). B-1/8” panel, C-screw mount,
D-retrofit
MANUAL RESET OPTIONAL POWER OUTAGE FEA- Supply Voltage: 1-120VAC (+10%/
TURE (Normally closed pushbutton across reset terminals) -15%), 2-240VAC (+10%/-15%), 3-
Control will auto-recover from a power loss. With liquid 24VAC (+10%/-15%), 5-220VAC
above electrode on terminal LLCO at a power outage event, (+10%/-15%), 8-208/240VAC (187
the control will de-energize and will automatically re- to 242 VAC Absolute Range)
energize upon return of power with liquid present on the Mode/Sensitivity: A-4.7K, B-10K,
probe at power-up. However, if loss of liquid is sensed on
C-26K, D-50K, E-100K
power-up, the control will remain de-energized until liquid N.C. Power Retrofit Test
again rises to electrode and pushbutton is depressed. The Pushbutton Outage Plate Feature
control will not attempt to auto-recover from a power outage C X
if no liquid was present on the probe at power loss. E X
F X X
TEST FEATURE N X X
Allows LLCO circuit to be tested without the need to drop P X X X
the water level in the boiler to create a dry probe condition. R X
Holding down the reset button for 3 seconds will allow the B X
LLCO circuit to trip, simulating a dry probe. The controller Y X X
will return to normal operation once the reset button is Z X X
pressed a second time. A X X X
Gems Sensors & Controls | One Cowles Road | Plainville, CT 06062-1198
Telephone: 1-800-378-1600 | Email: info@gemssensors.com | www.GemsSensors.com
