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Orencor r k a s r <br /> Signal- and Motor-Rated Float Switch Matrix <br /> Signal-rated mechanical floats'(tor control swi ' ons) <br /> P ModerNormally open ! Mechanical Yes n/a 11/ania 2.00 in. 1.50 in. 0.50 in. 2.00 in. <br /> N Model' Normally closed Mechanical Yes n/a n/a nia 2.00 in. 1.50 m. 0.50 in. 2.00 in� <br /> Motor-rated floats'(for pump switch applications) <br /> B Model Normally open Mechanical No 120V 13A 1/2 hp 2.00 in.b 2.50 in. 1.50 in. 4.00 in. <br /> 240V 13A 1 hp 3.00 in. 3.00 in. 1.50 in. 4.50 in. <br /> 4.00 in. 3.25 in. 1.50 in. 4.75 in. <br /> C Model Normally open Mechanical No 120V 13A 1/2 hp 2.00 in. 3.00 in. 2.50 in. 5.50 in. <br /> 240V 15A 2 hp 3.00 in.' 3.50 in. 3.00 in. 6.50 in. <br /> 4.00 in, 4.00 in. 3.50 in. 7.50 in. <br /> 5.00 in. 4.50 in. 4.00 in. 8.50 in. <br /> 6.00 in. 5.25 in. 4.25 in. 9.50 in. <br /> G Model Normally open Mercury Yes 120V 15A 3/4 hp 2.00 in. 1.50 in. 3.00 in. 4.50 in. <br /> 240V 15A 2 hp 3.00 in.' 1.75 in. 3.00 in. 4.75 in. <br /> 4.00 in. 2.00 in. 3.50 in. 5.50 in. <br /> a.Suitable for use with VCOM and MVP. <br /> Li Standard tether length <br /> Notes <br /> State.normally open or normally closed Ora wdown <br /> The default slate of a float-normally open or normally closed-refers to the contact Drawdown(in inches)refers to the difference in liquid level between a float switch's activation <br /> positions in the float when the float is resting(down).Float switches have an internal contact. and deactivation points.Drawdown can be aftered by adjusting the tether length of the float <br /> The terms-nomrally open"(N10)and"normally closed"(WC)refer to the state of the float switch cord.When selecting float switches,keep in mind that any float switch that can directly <br /> swilch contact In the down position.A normally open float switch has an open contact(off)in start and stop a pump(one that has no motor contactor in the control panel)should have a <br /> the down position and a normally closed float switch has a closed contact(on)in the down drawdown capability,to avoid rapid cycling of the pump. <br /> position.Different panel functions require different types of float switches.Most applications Signal-rated or motor-rated <br /> require float switches that are normally open.One notable exception Is the redundant off and Every float has a maximum amount of current it can handle.Exceeding these limits may cause <br /> low-level alarm function that requires a normally closed float switch,except with MVP and premature failure.Signal-rated or`control"floats are used to activate pump control panels <br /> VCOM panels. and alarms.Only low amperage signals pass through these float switches,hence the float <br /> 1R(intrinsically safe relay) switch is"signal-rated."All Orenco panels that use motor contactors can use signal-rated float <br /> Approved for use with intrinsically safe,Class 1.Division t applications,where reliable float switches,in some systems,a float switch is used to directly,start and stop a pump.In this <br /> switch operation with very low current is required. application,the current that is running the pump passes through the float switch as well,and <br /> the float switch must be"motor-rated."In most instances,a molar-raled float switch can be <br /> used as a signal float switch. <br /> NTD-MF-MF-1 Orenco Systems°Inc.,814 Airway Ave.,Sutherlin,OR 97479 USA • 800-348-9843•541-459-4449 r www.orenco.com <br /> Rev.2.0 '1 02/16 <br /> Page 2 of 2 <br />