Dwyer Instruments F7 Series Specifications, Installation & Operating Instructions

Vertical Models Vertical mount models are shipped with normally open switch contacts which close as the float rises toward the mounting threads. Reverse switch action by removing the float, rotating it end-for-end and replacing it on the stem. Horizontal Models Contacts in horizontal models F7-HPS-1 (internal mount) and F7-HPS-2 (external mount), are normally open when the float is down and normally closed when the float is up. Models F7-HPS-1 and -2 also have indicating arrows on the stem end to confirm float alignment. See installation notes on reverse. Horizontal model F7- HSS is in the normally open position when the indicating arrow points up, and normally closed when the arrow points down. INSTALLATION Choose a location away from fill pipes, drains, or other areas where turbulence or wave motion might occur. Turbulence will cause false actuations and shorten contact life. Excess contaminants in fluid may inhibit float operation and occasional wipe-down may be necessary. Care should be taken that switches are always operated within electrical ratings. Read and understand all safety precautions on back of this sheet before installing. MOUNTING Install vertical mount models in an appropriate 1/8˝ NPT fitting. Vertical models mount internally, oriented within 30° of vertical, or select optional fittings for external mounting. Model F7-HPS-1 must be mounted internally, which means the switch must be secured to the wall of the tank or vessel from the inside. Install horizontal model F7-HPS-1 in a 5/8˝ (16 mm) hole and secure with nut provided. Tank wall should not exceed 1/8˝ (3 mm). Model F7-HPS-2 requires a horizontal 1/2˝ NPT(F) fitting and can be fitted to the tank or vessel from the outside. Model F7-HSS requires a horizontal 1/2˝ NPT(F) fitting and can be mounting from the inside or outside (internally or externally) of the tank or vessel. Series F7 Liquid Level Switches Bulletin E-75 PIPE COUPLING ELBOW PIPE DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.com P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected] SPECIFICATIONS Electrical Rating (Maximum): F7-SB, SS2: AC: 25 VA, 1A @ 200 V. DC: 10W, 1A @ 200V. F7-PP, BT, HSS: AC: 30 VA, 0.14A @ 200V. DC: 0.28A @ 24 V, 0.07A @ 120V. F7-MPP: 10 VA, 0.1A @ 120 VAC. F7-MPP-NO: 50 VA, 0.2A @ 240 VAC. F7-HPS: 15 VA, 1A @ 220 VAC/DC. Mounting Connections: 1/8˝ NPT(M) (all vertical mount), 1/2˝ NPT(M) (F7-HPS- 2, F7-HSS), M16 x 2 (F7-HPS-1). Wire Leads: F7-SB, SS2, PP, BT: 22 AWG x 18˝ (46 cm); F7-MPP, HSS: 22 AWG x 24˝ (61 cm); F7-HPS: 22 AWG x 39˝ (1m). Enclosure Rating: F7-HSS: Explosion-proof, Class 1, Groups A, B, C, D; Class II, Groups E, F, G; Class III. Weight: F7-SB, 2 oz. (58 g); F7-SS2, 1.2 oz. (34 g); F7-PP, 0.8 oz. (23 g); F7- BT, 0.7 oz. (20 g); F7-HPS-1, 1.5 oz. (43 g); F7-HPS-2, 2 oz. (57 g); F7-HSS, 3 oz. (94 g); F7-MPP, 0.8 oz. (23 g). (Model F7-SB Shown) Model F7-SB F7-SS2 F7-PP F7-BT F7-MPP (A) Stem Length 2.75 (70) 2.06 (52) 2.18 (55) 2.18 (55) 1.63 (41) (B) Float Diameter 1.13 (29) 1.0 (25) 1.18 (30) 1.18 (30) 0.63 (16) (C) Float Height 1.38 (35) 1.0 (25) 1.0 (25) 1.0 (25) 0.63 (16) (D) Actuation from HEX 1.0 (26) 0.73 (19) 0.69 (18) 0.69 (18) 0.47 (12) Model Vertical Mount F7-SB F7-SS2 F7-PP F7-BT F7-MPP Horizontal Mount F7-HPS -1, -2 F7-HSS Material Float/Stem Buna-N & Epoxy/316SS 316SS (CYC)/316SS Polypropylene & Epoxy/Polypropylene Buna-N & Epoxy/PBT* Polypropylene / Polypropylene Polysulfone/ Polysulfone 316SS/316SS Max Temp. 220°F 105°C 300°F 149°C 220°F 105°C 220°F 105°C 176° F 80° C 185°F 85°C 392°F 200°C Max Press. 150 psig 10 bar 450 psig 31 bar 100 psig 6.89 bar 150 psig 10 bar 100 psig 6.89 bar 150 psig 10 bar 300 psig 20.7 bar Min S.G. 0.60 0.75 0.60 0.45 0.90 0.85 0.60 Approx. Deadband 1/16˝ 2 mm 1/16˝ 2 mm 1/8˝ 4 mm 1/8˝ 4 mm 1/8˝ 4 mm 3/16˝ 5 mm 1/8˝ 4 mm Dimensions, Inches (mm) *PBT - Polybutylene Terephthalate Optional Fittings (for Exterior Mounting of Vertical Models) A-347, 1/8˝ x 1-1/4˝ NPT C.S. Adapter. A-347-SS, 1/8˝ x 1-1/4˝ NPT 316SS Adapter. A-348, 1/8˝ x 1-1/2˝ NPT C.S. Adapter. A-348-SS, 1/8˝ x 1-1/2˝ NPT 316SS Adapter. 13/16 [20.62] DIA. MAX. 1-33/64 [38.48] 40∞ MAX 3-15/32 [88/09] M16X2 SWITCH CLOSED POSITION 2-15/64 [56.74] SWITCH OPEN POSITION 13/16 [20.62] MAX 1-19/32 [40.46] 40∞ MAX SWITCH CLOSED POSITION 3-7/16 [87.29] 2-23/64 [59.92] 2 [50.80] 1/2 NPT SWITCH OPEN POSITION 3/4 [19.05] 13/16 MIN [20.6] 22 AWG LEAD WIRES 1/2-14 NPT 4-5/8 MAX [116.8] APPROXIMATE ACTUATION LEVEL FITTING CENTERLINE 3/32 [2.54] 1-7/32 MAX [31.0] 1-5/32 MAX [29.2] C B D A EXTERNALLY WELDED FLANGE F7-HPS-2, INTERNAL HORIZONTAL MOUNT F7-HPS-2, EXTERNAL HORIZONTAL MOUNT Specifications - Installation and Operating Instructions F7-HSS 1.800.868.7495 QualityInstruments-Direct.ca

An electromagnetic relay, electromagnetic solenoid, electromagnetic counter with inductive component as circuit load. Capacitive Loads Possible causes - A capacitor connected in series or parallel with Reed Switch control. In a closed circuit, a cable length (usually greater than 50m [162.5 ft.]) used to connect reed switch may also introduce static capacitance. Lamp Loads Possible causes - A tungsten filament lamp load. ©Copyright 2014 Dwyer Instruments, Inc. Printed in U.S.A. 7/14 FR# 82-440677-00 Rev. 5 Installation Notes - Do not subject reed switch controls to excessive shock or vibration or any of the following: • Bending or placing force loads on reed switch housing. • Over-torquing fittings on reed switch housing. • Placing pull-out force on lead wires. CIRCUIT INFORMATION FOR REED SWITCH PROTECTION Read information below before installing your new reed switch control! Exceeding the current capacity of this Reed Switch control may cause FAULTY OPERATION! Be aware of the inductive and capacitive or lamp loads you may be placing on you Reed Switch Control. The circuits below outline possible solutions to preventing overloads due to inrush or surge currents exceeding maximum or when the switch current and product of the inductive back EMF exceed the switch’s power rating. Also the circuit for prevention of overload when switching filament lamps (low “cold” resistance) is outlined below. Failure to follow these measures to protect Reed Switch Contacts may cause the contacts to weld together or result in premature wear. Indicating arrows are provided on the stem ends to confirm float alignment. Do not exceed 1.5 pounds/ foot (2 n/m) tightening torque. Excessive torque may cause premature switch element or housing failure. Avoid installations where wiring entering the device is submerged or exposed to excessive amounts of liquid or humidity condensate. Gasket seal for internal mounting units should be pre- assembled before insertion through tank wall. Wall thick- ness should not exceed 1/8" (3 mm). When preparing wires for termination, avoid pulling against the resin seal or end plug of the float switch. Units with tapered pipe threads should be treated with Teflon based thread compound or tape before insertion in fitting. Sufficient torque is achieved at hand- tight plus one half turn. Possible Circuit Solutions Indicated by Dashed Lines DIODE SUPPRESSION DIODE INDUCTIVE LOAD PIV DIODE > V REED SWITCH REED SWITCH USED IN AC CIRCUITS VARISTER VARISTER PROTECTION INDUCTIVE LOAD RC SUPPRESSION R C INDUCTIVE PROTECTION FOR CABLE LENGTH CAPACITANCE LOAD REED SWITCH Cable Length over 50 meters [162.5 ft.] REED SWITCH RESISTOR PROTECTION FOR CAPACITIVE LOAD SURGE LIMITER FOR CAPACITANCE IN SERIES REED SWITCH CURRENT LIMITING RESISTOR IN SERIES CURRENT LIMITING RESISTOR IN PARALLEL REED SWITCH REED SWITCH INDUCTIVE LOAD REED SWITCH SWITCH[uf] 10 C R 10*I(1+50/E) SWITCH 2 CLOAD SWITCH SWITCH LOAD C R L =0.5~ 5 mH P +V RA P L RA +V R = 50~500 Ohms RB P L L = 0.5~5 mH P +V RL R R V-0.12 RL 2 +V RL 5R > R L R DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.com P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected] 1.800.868.7495 QualityInstruments-Direct.ca