Reset Button Optional
NO
C
NC
G
L2
MANUAL RESET OPTIONAL POWER OUTAGE FEATURE (Normally closed pushbutton across reset terminals) Control will ignore power loss to control. With liquid above 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.
MANUAL RESET (Normally closed pushbutton installed across reset terminals) When the liquid rises to the electrode on terminal LLCO, the control will remain de-energized 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 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.
X
X
N P
Gems Sensors Inc. One Cowles Road Plainville, CT 06062-1198 Tel: 860-793-4579 Fax: 860-793-4580
R
X X
X
X
X
E F
Power Outage
C
N.C. Pushbutton
X X
X
Retrofit Plate
Optional Character Chart
* 187 Vmin to 255 Vmax VAC
Time Delay: 3 seconds standard up to 6 seconds Optional Character: See optional character chart below Enclosure: 0- None, 1- NEMA 1, 4NEMA 4, 7- NEMA 7, 12- NEMA 12 Stand off Style: A- 1/16 Panel, B- 1/8 Panel, C- Screw Mount, D- Retrofit Voltage: 1- 120 VAC, 2- 240 VAC, 3- 24 VAC, * 8 = 208/240 VAC Sensitivity: A- 4.7K, B- 10K, C- 26K
If metallic, tank may be used instead of reference probe
Reference Probe
26 X X X – X – XX – XX
Low Level Cut-0ff Probe
Reset
LLCO
L1
A.C. Supply
AUTOMATIC RESET (Reset terminals not used) 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 control 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 seconds before control de-energizes.
Wiring Diagram
E-5
쑺 Spade Terminals for Easy Wiring 쑺 Manual Reset (optional) 쑺 Power Outage Feature (optional) 쑺 U.L. “Motor Control”
1 N.O. & 1 N.C. (1 form C) extra function 10 amp Resistive 1/3 hp H/L Direct/Inverse, LLCO – factory set 0-26K ohm, factory set 120 VAC, 240 VAC1, 24 VAC (+10%/-15%) 50/60 Hz 12 VAC -40°F to 150°F U.L. 508 File # MP1430, U.L. 353 File # E44426, CSA Spade connection Time Delays, Manual Reset, Power Outage, Retrofit Plate
DF
X
X
www.gemssensors.com
*See page E-29 for descriptions.
Optional Character* Time Delay (increasing level) H/L function 01-20 – seconds Time Delay (decreasing level) H/L function 01-20 – seconds Time Delay (decreasing level) LLCO function only 03 – 3 seconds 06 – 6 seconds
X
X
– Standard part numbers
Mode of Operation Direct Inverse A – 4.7K K – 4.7K B – 10K L – 10K C – 26K M – 26K Supply Voltage 1 – 120 VAC 2 – 240 VAC 3 – 24 VAC 8 – 208/240 VAC Standoff Style* A – 1/16˝ Panel C – Screw mount B – 1/8˝ Panel D – Retrofit Enclosure 0 – None 1 – NEMA 1 4 – NEMA 4
Series DF
X
XX XX XX
Use the Bold characters from the chart below to construct a product code.
How to Order
Notes: 1. 240 VAC unit does not carry U.L. Limit Control recognition.
Contact Design Contact Rating (120, 240 VAC) Mode of Operation Sensitivity Primary Voltage Secondary Voltage Temperature Approvals Terminal Style Options
Specifications
Dual function Series DF models are designed to control two independent level functions, one single-level control operation and one differential-level operation. Optional Power Outage feature resets after nuisance outages. Optional Reset Button is used when device has been deactivated due to low water condition. Reset is activated only after water has returned to normal level. This control is ideal in applications on boilers, food service equipment, and chemical delivery systems.
쑺 Solid State Reliability 쑺 Compact Size 쑺 Meets CSD1 Requirements 쑺 CSA Approved 쑺 U.L. “Limit Control”
Series DF – Dual Function Controls
Series DF
Dual Function Single-Level Service Differential Service Feedwater Control / Low-Water Cutoff High Level / Low Level Pump Down / High Level
Note: For single level service, use “H” and “G” connections.
Wiring
Dimensions
• • • • • •
Applications
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UL