TRITON CONTROLS - FLOAT SWITCHES LR03 – NON MERCURY LEVEL REGULATORS Float Switches are inexpensive and efficient liquid level detectors. They are simple to install, and designed for trouble free operation over a long life. The LR03 is a plastic float switch moulded to either a PVC or synthetic rubber 3 core cable. Actuation is via a roller ball and micro-switch arrangement within the switch thereby eliminating all heavy metals from this version. O 50 OPTIONAL WEIGHT 57 CABLE LENGTH O 9 Construction The unit comprises three major components : 1. The float chamber houses the micro-switch arrangement, totally sealed within a polypropylene casing, with a single pole double throw action. 2. The three-cored cable, connected to the micro-switch assembly inside the float chamber, is sheathed in CPE (chlorinated polyethylene) synthetic rubber or PVC. This cable is supplied in three standard lengths, 5 metres, 10 metres and 20 metres ±5% of the length quoted. Other cable lengths are available to order. 81 WIDTH 40mm TRITON CONTROLS LTD 103 3. The optional stabilizing weight may be fixed at any point on the cable using the rubber “O” ring supplied. The weight is sealed within a moulded polypropylene housing. In order to provide total positional security in lubricants and similar liquids, a nylon cable-tie is provided for attachment to the cable beneath the weight Mounting Whilst no hard and fast rules apply to the mounting of these units, the lead should be supported in an enclosed vessel, and in an open vessel it is advantageous to clip the lead to the side, especially if excessive turbulence is experienced. To obviate the effects of rapid switching conditions that would result if such turbulence is experienced, it is advantageous to use a maintaining circuit which both safeguards the micro-switch and cuts out any chatter in the starters of associated pumps etc TRITON CONTROLS LTD., UNIT 2, RANDOLPH INDUSTRIAL ESTATE, EVENWOOD, BISHOP AUCKLAND, Co. DURHAM. DL14 9SJ. ENGLAND. TEL +44 (0) 1388 833000 FAX +44 (0) 1388 833680 Web : www.tritoncontrols.co.uk Email : [email protected] LR03 - PLASTIC FLOAT SWITCH Method of Operation BLACK PVC OR CPE SYNTHETIC RUBBER CABLE BLUE BROWN MOULDED CABLE SEAL MICROSWITCH LEVER ANTI-VIBRATION MOULDING STEEL ROLLER BALL The micro-switch assembly inside the float, axially mounted in line with the weight, changes contacts according to the float’s position, as in the diagram below. Therefore as the liquid level drops or rises slowly, a pump or flow control suitably connected, can be switched in or out to maintain an average level of the liquid. By connecting only one side of the switch, the unit can be also used to fill or empty the tank as required. Contact rating: Dimensions, in mm, do not take into consideration any lateral swing of the cable. 250V 15A, non-inductive. 250V 10A, inductive. 1.3 HP NOTE: Local Regulations may limit the voltage. CONTACT BETWEEN BROWN AND BLACK LEADS IS MADE 45° Max. temperature 70° C Max. submerged depth 20 metres Compressive Strength 482 KN/m² (70 lbf/in²) 280 MIN. 330 MIN. OPERATIVE DEPTH Operational in specific gravities from 0.9 to 1.3 A comprehensive list of chemical resistances for the LR03 float switch is available on request. 45° CONTACT BETWEEN BROWN AND BLUE LEADS IS MADE OPERATING POINTS ARE APPROXIMATE ONLY Connection diagram for automatically emptying tank BLACK LEAD LR03-Weight Connection diagram for automatically refilling tank BROWN LEAD COIL FOR MAX. 240V (AC) BROWN LEAD 275 g COIL FOR MAX. 250V (AC) BLUE LEAD BLACK LEAD BLUE LEAD N L3 L2 L1 MAINS SUPPLY N L3 L2 L1 A B C TO PUMP MOTOR When ordering please specify part numbers. Type Part Number Weight (Approx) 5 metre PVC cable LR03-L05M-PVC 10 metre PVC cable LR03-L10M-PVC 20 metre PVC cable LR03-L20M-PVC 0.6 Kg 1.1 Kg 2.1 Kg A MAINS SUPPLY B C TO PUMP MOTOR Type Part Number 5 metre CPE cable LR03-L05M-CPE 10 metre CPE cable LR03-L10M-CPE 20 metre CPE cable LR03-L20M-CPE Weight (Approx) 0.6 Kg 1.1 Kg 2.1 Kg TR ITO N C O N TR O LS LTD NO M W EG HT, 1 KG 100.0 m m 52.0 m m C LAM PIN G TO C ABLE BY M 8 N U T & BO LT 26.0 m m BO TH H ALVES ID EN TIC AL DIM ENSIONS mm TO LERANCE ±0.4 DRAW N 1 TITLE B O LT-O N C A ST IR O N C A B LE W EIG H T DRG No 041200 5 2 3 4 6 7 8 D ATE LR 03-W 2 04-12-00 TR ITO N C O N TR O LS LTD .,U N IT 2,R A N D O LPH IN D U STR IA L ESTA TE, EV EN W O O D ,BISH O P A U C K LA N D ,C o.D U R H A M .D L14 9SJ.EN G LA N D . TEL +44 (0)1388 833000 FA X +44 (0)1388 833680 W eb :www.tritoncontrols.co.uk Em ail:info@ tritoncontrols.co.uk