Thermo‐Flo™ Compact Flow Controller LC30 Series Manual Flowline Inc. 10500 Humbolt Street Los Alamitos, CA 90720 Tel: (562) 598‐3015 Fax: (562) 431‐8507 www.flowline.
INTRODUCTION / TABLE OF CONTENTS Step One The LC30 Series Controllers are general‐purpose flow controller that accepts one flow sensor input and provides one 16A relay for low‐flow pump or process protection. This package has an optional flashing alarm and is ideal for alarm indication. Package this flow controller with our liquid or gas flow switch sensors.
SPECIFICATIONS/DIMENSIONS Controller Supply voltage: Consumption: Sensor inputs: Sensor supply: LED indication: Contact type: Contact rating: Contact output: Contact delay: Electronics temp.: Enclosure rating: Enclosure material: Enclosure mount.: Enclosure rotation: Conduit entrance: Classification: Certificate number: CE compliance: Step Two 120 / 240 VAC, 50 ‐ 60 Hz. 5 Watts max.
SAFETY PRECAUTIONS Step Three About This Manual: PLEASE READ THE ENTIRE MANUAL PRIOR TO INSTALLING OR USING THIS PRODUCT. This manual includes information on two different models of Compact Relay Flow Controllers from Flowline: LC30‐10_1 and LC30‐10_2. The LC30‐10_1 is a single‐input flow controller and the LC30‐10_2 is a single‐input controller with a Strobe Alert™ flash alarm. Many aspects of installation and use are similar between the two models.
SAFETY PRECAUTIONS (cont.) Step Three Make a Fail‐Safe System: Design a fail‐safe system that accommodates the possibility of relay or power failure. If power is cut off to the controller, it will de‐energize the relay. Make sure that the de‐energized state of the relay is the safe state in your process. For example, if controller power is lost, a pump filling a tank will turn off if it is connected to the Normally Open side of the relay.
GETTING STARTED Step Four The LC30 Series may be used with any Flowline flow switch with an N‐channel (ends in “‐_ _ _ 2”) or relay (ends in “‐_ _ _ 5”) output. The relay is a single pole, double throw type; the controlled device can be connected to either the normally open or normally closed side of the relay. A time delay from 0 to 60 seconds can be set before the relay responds to the sensor input. Typical applications for the LC30 Series are pump protection, no‐flow indication or chemical injection.
ELECTRICAL Step Five Connecting switches to input terminals: Please note a difference between FLOWLINE flow switches. All flow switches will be wired with the White wire to the (S) terminal. Models FT10 ‐ _ _ _ 5 and GT10 ‐ _ _ _ 5 will be wired with the Green wire to the (‐) terminal). The Red and Black wires can be wired to either the (+) terminal or (‐) terminal based upon switch polarity. See the illustration below to indicate wiring for your switch.
ELECTRICAL Step Five Strobe Alert Output (LC30 ‐ _ _ _ 2 Series): With the Strobe Alert wired NC; it can be used as a high or low level alarm, depending on the setting for the invert switch. The Strobe Alert can also be wired NO. Changing from 120 to 240 VAC: 1. Remove the two screws from the top of the printed circuit board (PCB) and gently slide the PCB from the housing. Use caution when removing the PCB. 2. Located jumpers JWA, JWB and JWC on the PCB. 3.
INSTALLATION Step Six Mounting on a Sensor: The following procedure should be used when mounting the controller directly on a flow sensor. All power to the system must be off before installing the junction box. 1. Prepare the sensor: The following instructions assume the sensor is already mounted in a position on its fitting (as described in the sensor manual).
INSTALLATION (continued) Step Six 4. Mechanical connection to conduit: All wiring between a controller and sensors should be in conduit. The power entrance of the controller is a standard ½” NPT female fitting that will attach to standard electrical conduit, either plastic or metal, as specified by local codes. Keep in mind that the housing may have to be unscrewed from the sensor for periodic cleaning of the sensor.
APPLICATION EXAMPLES Step Seven Low Flow Alarm: The goal is to indicate when the flow rate falls below a certain point. If it does, an alarm is supposed to sound, alerting the operator of a low flow condition. If power is accidentally cut to the controller, the sensor's ability to notify the operator of a low flow condition could be lost. The system must alert the operator not only to low flow, but to controller power loss.
FLOW SWITCH CALIBRATION Step Eight Set Points: If the preset factory calibration is not adequate for your application, follow the calibration steps listed below. Note: the switch's internal LED will be on when the switch detects no‐flow and will off when the switch detects flow. 1. Install the fitting and flow switch as described in the Installation section of this manual. Turn the flow switch and controller power on and adjust the flow rate to the application setting.
APPENDIX Step Nine Controller Logic: Please use the following guide to understand the operation of the controllers. 1. Power LED: Make sure the Green power LED is ON when power is supplied to the controller. 2. Input LED: For NC switch wiring, the input LED on the controller will be Amber when the switch reads no‐ flow and OFF when the switch reads flow. 3. Invert Operation: When the input LED turn Off and On, the relay LED will also switch.
WARRANTY, RETURNS AND LIMITAITONS Step Ten Warranty Flowline warrants to the original purchaser of its products that such products will be free from defects in material and workmanship under normal use and service in accordance with instructions furnished by Flowline for a period of two years from the date of manufacture of such products.
