Max. temp. of sensor C. Capillary tube mm. Switching difference K. Sensor cartridge mm

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1 21.610/1 RAK: Universal thermostat How energy efficiency is improved Demand-led controlling, monitoring and limiting, without auxiliary energy. Areas of application For controlling and monitoring the temperature of liquids in baths, tanks, pipelines and ducts. Thanks to modular design, can be used as controller, monitor, limiter or safety limiter. Features Temperature range: -10 to +230 C Classified as Cat. IV according to DGRL 97/23/C <45 secs. time constant in water Thermostat with remote sensor Clamp-on thermostat Capillary-tube thermostat with and without protective tube Double thermostat e.g. as TW and STB Technical description Two-part housing made of plastic, lower part black, upper part yellow, including inspection window 0,8, 1 and 1,6 m capillary tube length Also for flue gas pipes Type Setting range Switching difference K Capillary tube mm Sensor cartridge mm Max. temp. of sensor C C As a temperature controller-monitor (TW); with LW 7 pocket, brass, 100 mm; as per DI 3440 RAK 582.4/ RAK 582.4/ RAK 582.4/ RAK 582.4/ RAK 582.4/ RAK 582.4/3729 3) 5) RAK 582.4/3753 3) 5) As a safety temperature limiter (STB), classified in D 97/23/C as per Cat. IV; with LW 7 pocket, brass, 100 mm; as per DI 3440; intrinsically safe; with mechanical lock. RAK S 130/120/110/100/95 1) As a temperature limiter (TB); with mechanical lock; with LW 7 pocket, brass, 100 mm; as per DI 3440 RAK 584.4/ RAK 584.4/ As STB for exhaust pipes with sensor tube and pocket; as per DI 3440; intrinsically safe; with lock RAK 574.4/ /100/ RAK 574.4/ /140/ RAK 574.4/ /180/ Max. contact rating 2) Type of protection IP 54 ( 60529) Terminal 1-2 TW, TB 10 (2.6) A 250 V~ Protection class I (IC 60730) Terminal STB 10 (6) A 250 V~ DI register number Terminal 1-4 TW 4 (0.6) A 250 V~ ot classified in the D RAK 574.4, Min. contact rating 500 ma 40 V and Time constant in water without pocket < 15 s Classified in the D 97/23/G with LW 7 pocket < 45 s as per Cat. IV: RAK S Calibration point TW, TB 23 ± 2 C (Tu 23) Test marking 4) ID: STB 37 ± 2 C (Tu 37) Influence of head temperature Wiring diagram TW A10391 depends on type 0,20...0,60 K/K STB A10396 Weight 0,22 kg TB A10394 Transport and storage temp C Dimension drawing M05633 Permissible ambient temp. (housing) C (T70) Fitting instructions MV as clamp-on sensor (water temp.) max. 130 C 1) Settings (via catches) are irreversible 2) If under inductive load, take RC circuit into account. 3) Pocket included; stainless-steel pockets should be used above 130 C; see chapter 29, pocket LW 7 iro 4) Certificates can be downloaded from 5) Distance piece 100 mm for temperatures > 130 C included T Y02103 Y02115 TXsd Xs T B01571 RAK

2 21.610/2 RAK Accessories * Indicator lamp: 250 V~ for showing the switching status on the monitor Assembly kit for clamp-on and double thermostat with 2 plugs for maintaining degree of protection IP 54, plus retaining strap for fitting to pipes of ½ 3 (for RAK as a clamp-on thermostat: T < 120 C) As stem-type thermostat: (see chapter 29 for further details on pockets) LW 7 pockets; of brass; R½; for one sensor cartridge LW 15 pockets; of brass; R½, for 2-3 sensor cartridges * Distance piece 100 mm As thermostat with remote sensor: * Sensor holder for wall mounting * Rubber grommet for capillary-tube guide in air ducts; T < 50 C * Tension-relief piece for fitting in protective tubes * Fixing bracket for wall or duct mounting * Supporting coil for sensor, for direct fitting in air ducts * Grommet for capillary tube, with packing box; R½, brass, 12 bar, 180 C *) Dimension drawing or wiring diagram are available under the same number Operation The single-pole change-over contacts (or the normally-closed contacts on the TB) function according to temperature. The adjustable setpoint Xs equals the upper switching point. The switching difference Xsd is fixed. By dovetailing their housings together, two units can be linked to each other side by side, thereby easily allowing a double thermostat (controller-monitor or monitor-limiter) to be employed. On reaching the setpoint, the contacts change over and lock mechanically. ot until the temperature has fallen can the thermostat be reset by pressing the internal Reset knob. Additional technical details Setting accuracy ±6 K at 50 C Sensor medium:- as a limiter +0/-9 K at 50 C up to 160 C polyalfaelefine as a clamp-on sensor +4 K (systematic error) up to 230 C terphenylene Serviceable life > switchings CAS no.: when used as a limiter > switchings On the basis of the information currently available, no risks Degree of radio interference click rate < 5 ( 55014) to health or to the environment (as per 67/548/C) can be Material:- expected if used in accordance with regulations. Housing base PA reinforced to 120 C Housing lid PC, resistant to 120 C Conforms to low-voltage directive 73/23/C ( ;2-9) Window PC, resistant to 120 C Conforms to MC directive 89/336/C as per 55014: 4.2 RAK should not be used to guarantee the safety of installations which are subject to regulation 97/23/C concerning pressure equipment. Influence of temperature of instrument head Type RAK.... Calibration tolerance K Correction factor * ) K/K 3773 ±6 0, ±6 0, ±6 0, ±6 0, ±7 0, ±7 0, ±8 0, /-9 0, ±6 0, ±7 0, /-12 0, /-12 0, /-13 0,60 * ) with respect to the ambient temperature B03772 Technical notes RC circuit under inductive load For the optimum RC circuit, see specifications supplied by the manufacturer of the contactors, relays etc. If, however, these are not available, the following rule of thumb (not binding) can be used to reduce the inductive load:- Capacitance of the RC circuit (μf) operating current (A) Resistance of the RC circuit (Ω) coil resistance (Ω)

3 l RAK /3 Wiring diagram Controller, monitor, limiter TR, TW Safety temperature limiter STB Temperature limiter TB A10391 A10396 A10394 Dimension drawing 110 L 41?,5 25 Pg ,8 66,8 M05633a

4 21.610/4 RAK Accessories , M00328c? 6,5?? ,5 20 M00162a Z ,5 12, ?, M , ? 6 3,2 70 R1/ ,5 50 s27 M ,2 17 M00161b Min.? Max. 200 M06140 M06139

5 RAK /5 Fitting methods RAK R1/2 LW7? 60 l L 13?,8 B05634a B ,7?,5 89 l > 70? 6 LW15 R min = 5 B05637a B05636c min.? 5 B06144a R min = 5 B09827 When used as an STB as per D, Cat. IV, please observe the notes at ID: on fitting. Printed in Switzerland Right of amendment reserved.b.: A comma between cardinal numbers denotes a decimal point Fr. Sauter AG, CH-4016 Basle