01D351-GB FLOAT SWITCHES FLOW SWITCHES …

1 FLOAT SWITCHESFLOW SWITCHES FOR LIQUIDS pressure SWITCHES01D351-GBDOLOMIT FLOAT SWITCHESThe DOLOMIT FLOAT SWITCHES findapplication in liquid level control intanks and wells; they require con-nection to pumps (or other electricalequipment). They can be used withdrinking water and sewage as wellas other liquids compatible with thecomponents of the SWITCHES FOR LIQUIDSFlow SWITCHES interrupt an electrical control circuit when the watercirculation fails in the circuit for some abnormal condition ( stop-ping of motor-driven pumps).

2 They are operated thanks to a blade-type electrical tripping device (stainless steel blade). pressure SWITCHESThe PRM pressure switch is with normally closed contacts; when thepressure of the system exceeds the set pressure , the contacts areopened thus interrupting the series PA pressure switch automatically controls operation of themotor-driven pump in accordance with the fixed set switch for liquid level controlin 2 m0420203 3 m0420205 5 m0420210 10 mPart switch Series IGDfinds application in liquid levelcontrol in tanks and wells.

3 It requires connection topumps (or other electrical equipment). The FLOAT switchcan be used with drinking water and sewage as well asother liquids compatible with the components of theproduct. FLOAT switch Series IGDis spray and dust proofthanks to a double sealing obtained by injection mouldingusing the same material of construction for the body (nontoxic polypropylene).Product reliability is ensured thanks to the sound expe-rience of WATTS Cazzaniga in the sector as well as to thestringent testing programme to which both the processand product are is important to make sure that they are no objects impe-ding the FLOAT movement.

4 If necessary, adjust the FLOAT armby suitably positioning it with relative is good practice to position the FLOAT on the sideopposite to liquid connection:The three-pole cable (cable colour: Blue - Brown - Black)allows FLOAT switch Series IGDto be used for emptying orfilling depending on the electrical connections asdescribed below:- Emptying / Black - Brown connection / contact closes with FLOAT at top- Filling / Black - Brown connection / contact closes with FLOAT at AND ELECTRICALCONNECTIONSF loat switch Series IGDcan be used either for filling oremptying tanks and important factor is the length of the rotating armwhich determines the minimum and maximum liquidlevels.

5 For such purpose, the arm length can be shortenedusing the appropriate counterweight (CP/NSD).Figures 1 and 2illustrate the mark in conformity with European Directives EEC89/336, EEC 73 1 Fig. 2 Overall dimensions (mm)EMPTYINGFILLINGONPOFFONOFFONOFFDESIG N FEATURESBodyNon toxic polypropyleneCablePVC - / Neoprene - (*)Conductor size1 mm2(*) cable 3 x 1 available with other lengthsTECHNICAL CHARACTERISTICSC ontact load rating16 (4) A at 250 V~Max. operating temperature80 CStorage temperature range-20 C +80 CType of electrical dutyLightDegree of protectionIP 67 (immersion proof ) Switching angle-45 +48 Electrical insulation classIIDimensions91 x 129 x 40 mmWeight143 gVolume254 cm3 FILLINGONOFFCE mark in conformity with European Directives EEC 89/336, EEC 73 FEATURESBodyNon toxic polypropyleneCablePVC - / Neoprene - (*)Conductor size1 mm2 Conductor size16 (4) A at 250V~ (**)(*) cable 3 x 1 available with other lengths(**)

6 Also available in the version with microswitch 20 (8) A at 250V~TECHNICAL CHARACTERISTICSC ontact load rating16 (4) A at 250 V~Max. operating temperature80 CStorage temperature range-20 C +80 CType of electrical dutyLightDegree of protectionIP 67 (immersion proof ) Switching angle-45 +45 Electrical insulation classIIDimensions73 x 99 x 37 mmWeight89 gVolume155 FLOAT switch forliquid level control in 2 m0424030 3 m0424050 5 m0424091 10 mPart switch Series IGMfinds application in liquid levelcontrol in tanks and wells; it requires connection topumps (or other electrical equipment).

7 The FLOAT switch can be used with drinking water andsewage as well as other liquids compatible with the com-ponents of the products. FLOAT switch Series IGMisspray- and dust proof thanks to a double sealing obtainedby injection moulding using the same material of con-struction for the body (non toxic polypropylene).The IGM Serieshas been especially designed with verycompact size, although still retaining electrical and floatcharacteristics such as to ensure perfect reliability is ensured thanks to the sound expe-rience of WATTS Cazzaniga in the sector as well as to thestringent testing programme to which both the processand product are is important to make sure that they are no objectsimpeding the FLOAT movement.

8 If necessary, adjust thefloat arm by suitably positioning it with relativecounterweight. It is good practice to position the FLOAT onthe side opposite to liquid connection:The three-pole cable (cable colour: Blue - Brown - Black)allows FLOAT switch Series IGM to be used for emptying orfilling depending on the electrical connections as descri-bed below:- Emptying / Black - Brown connection / contact closes with FLOAT at top- Filling / Black - Brown connection / contact closes with FLOAT at bottomINSTALLATION AND ELECTRICALCONNECTIONSF loat switch Series IGMcan be used either for filling oremptying tanks and important factor is the length of the rotating armwhich determines the minimum and maximum liquidlevels.

9 For such purpose, the arm length can be shortenedusing the appropriate counterweight (CP/NSD). Thanks toits compact size, the FLOAT switch is suitable for connectionto pumps with cable lengths also shorter than 40 cm (therotating arm can be shortened up to 10 cm) and 2illustrate the 1 Fig. 2 Overall dimensions (mm)EMPTYINGONPOFFONOFFS etting of FLUis by means of relative screw; fully tighten the screw to obtainminimum flow rate setting, fully loosen the screw to have maximum flow ratesetting. The following table gives the values for limiting flow rate settings in m3/hin relation to the pipe diameter.

10 The FLUflow switch is supplied with the settingscrew fully tightened (minimum setting).For applications in heating systems subject to approval in accordancewith the requirements of Body R, where a safety action is requested (switching offof the motor-driven pump under an abnormal condition), it is advisable to leavethe setting at minimum, bearing in mind that the device acts on the burner whenthe flow rate drops below the value given in the bold-face switch for liquids, forpiping from 1" to 8".0401125 1 IP640401126 1 IP67 Part No.