The ALCO S3 is a with fixed switchpoint settings. Features Maximum Operating ressure up to 43 bar Test ressure up to 48 bar Standard factory settings from stock in small volumes High and low pressure switches High temperature version with snubber for direct compressor mounting (Range 6) Direct mounting reduces the number of joints and thus avoiding potential leakage recise setting and repeatability I 65 protection if used with the new S3Nxx and S3 Lxx cables with plug (acc. EN 7583), no additional gasket required (molded into plug) Customer specific versions in multipacks, minimum order quantity Stück S3 Options For direct mounting on a pressure connection (free standing) or with a capillary tube Direct compressor head mounting with high temperature bellows and snubber: reduces the number of joints avoids potential leakage saves high cost of flexible hose TÜV approved versions for high and low pressure Microswitch for narrow pressure differentials Gold plated contacts for low voltage/current applications Cables with plug S3Nxx/S3Lxx not included; to be ordered separately (see page 8 for details) S3 Standards per Low Voltage Directive per ED Directive 97/3/EC, TÜV appr. versions only Manufactured and tested to standards on our own responsibility Underwriter Laboratories Introduction S3 are equipped with a SDT snap action contact, switching from to 4 on rising pressure and from 4 to on falling pressure (see diagram). The S3 is factory preset according to customers specification and is not adjustable. Several models are available: Low pressure switch, with automatic or manual reset High pressure switch, with automatic or manual reset TÜV approved safety high pressure limiter with automatic reset TÜV approved safety high pressure cutout, with internal or external manual reset TÜV approval for pressure switches can be reached either by using a double diaphragm (ressure range 5) which acts in a failsafe mode or by a single pressure element (Bellows, ressure range 6) which is able to resists to > Mio. cycles between 5% and % of the maximum operating pressure (see 4.6. of EN 63). single diaphragm double diaphragm bellows (pressure range 6) S3 353_EN_R8.doc / 9.8.
Technical data ressure sensing element Type of diaphragm Max. medium temperature Construction Material Snubber ressure Ranges TÜV approval Function Code * ossible ressure Conn. Standard 7 C Single diaphragm Bronze no 5 No A,R A,K,L,S,U,X temperature Double diaphragm Bronze no 5 Yes B,S,W A,K,L,S,U,X High 5 C Bellows Stainless yes 6 Yes B,S,W S,U,X temperature steel 6 no A,R S,U,X *) see page 7 for more details. Maximum ambient temperature ( C) Note: For high temperature applications, i. e. medium 7 temperatures between 7 C and 5 C, the maximum ambient temperature must be derated as per drawing. 6 E.g.: on medium temperature C the ambient temperature of 55 C around the switch housing should not be exceeded. 5 4 7 8 9 4 5 Medium temperature ( C) Standard (SDT) Standard (SDT) Gold plated contacts Micro switch (SDT) Micro switch(sdt) Gold plated Contacts Inductive load (AC5) 3A / VAC,A / VAC.5A / VAC,A / VAC Inductive load (DC),A / VDC,A / VDC.A / VDC,A / VDC Motor rating amps (FLA) 6A / / 4VAC _.5A / / 4VAC _ Lock rotor amps (LRA) 36A / / 4VAC _ 5A / / 4VAC _ Note: Standard contact not suitable for electronic applications (< ma) rotection class (IEC 59) with terminal cover with appliance socket or cables with plug S3Nxx / Lxx / 5 / 45 I I I 65 Temperature range TS: ambient, storage and transportation medium 4 C to 7 C 4 C to 7 C Resistance to viation (at.. Hz) 4g 4 C to 5 C for Range 6 Medium compatibility * HFC, HCFC Available approvals TÜV, UL Weight (approx.). kg *) NOTE: S3 are not released for use with inflammable refrigerants. ressure Ranges ressure Range code Type of contact Adjusting Range Max. Operating ressure S roof ress. T Differential reset Differential automatic / A.6.. 6 7 approx.,3 3 /C Standard... 6 approx.,5 see charts on page 4 / D and 5 / E (SDT) 6.. 3 36 approx. 4 4 6 6 / F.. 43 43 48 approx. 5 J / S.6.. 6 7 approx.. to.3 L / U Micro switch... 6 approx..3 to.45 N / W (SDT) 6.. 3 36 approx..4 to.6 O / X.. 43 43 48 approx..5 to.8 Tolerances Range code / J 3 / L 4 5 / N 6 / O 4,5,6 (TÜV appr.) Setting ±.6 ±.4 ±.8 ±.8 ±.8 according to EN 63 Tolerances are valid between...55 C. S3 353_EN_R8.doc / 9.8.
Selection. referred types Type CN Fixed setting Reset Max. temperature pressure Leakage test pressure Cutout Cutin ambient connection ressure connection High ressure Controls S3A6S 75 63 6,, 7/6" UNF S3A6S 75 64 9, 5, Auto 7 C 5 C 48 female thread with S3A6S 75 6 6,5,5 Schrader opener Low ressure Controls / ressure Limiter for low pressure protection SL EN 63 S3WS 74 76,3, 7/6" UNF S3WS 74 76,3,8 Auto 7 C 7 C female thread with S3WS 74 76, 3,5 Schrader opener ressure Limiter for high pressure protection SH with snubber for direct compressor mounting EN 63 S3W6S 75 83 4,, S3W6S 75 556, 6, 7/6" UNF S3W6S 75 555 5,, Auto 7 C 5 C 48 female thread with S3W6S 75 567 9, 3, Schrader opener S3W6S 75 55 33,5 7,5 and snubber S3W6S 75 553 4, 33, ressure Cut Out for high pressure protection ZH with snubber for direct compressor mounting EN 63 S3B6S 75 568 9, S3B6S 75 564,7 appr. external 7/6" UNF S3B6S 75 563 7,3 5 bar manual 7 C 5 C 48 female thread with S3B6S 75 569 9,5 below reset Schrader opener S3B6S 75 56 36, cutout and snubber Delivery: small quantities, single package without plug (Cables with plug must be ordered separately, see page 8). Customer specific types Minimum batch size: pieces Switching points The differential of factory set switch points can be adjusted within the limits given in the charts on page 4 to 6. Use the recommended lower switch point line in working envelope for optimum results. Example: Step : Select your desired upper switch point. Draw a horizontal line to cross the upper switch point line. Step : Draw a vertical line from this intersection point. Step 3: Select your desired switch point between and 4. 4 pressure 3 4 Example Upper switching point max. lower.. recommended lower... min. lower...... switching point Notes:. Specify always upper and lower switching points for pressure switch with automatic reset function.. Specify only cutout switching point for pressure switch with manual reset function. 3. For versions with microswitch only one switching point can be adjusted while the second switching point is determined by the fixed differential of the microswitch (see ressure Ranges on page ). 3 4 5 6 7 8 9 4. Specify such devices with one switching point as the significant point and the other one as nonsignificant by putting the latter in ackets, e.g. S3AJS./(.8) S3 353_EN_R8.doc 3 / 9.8.
6 Range / A 5 4 ressure 3 3 4 5 6 7 8 9 Range 3 / C 6 4 ressure 8 6 4 3 4 5 6 7 8 9 S3 353_EN_R8.doc 4 / 9.8.
Range 4 / D 5 ressure 5 5 3 4 5 6 7 8 9 Range 5 / E 5 ressure 5 5 3 4 5 6 7 8 9 S3 353_EN_R8.doc 5 / 9.8.
45 Range 6 / F 4 35 ressure 5 5 5 3 4 5 6 7 8 9 Selection guide S3A6S Condenser Service Valve S3W6S Fan Motor Receiver S3B6S* Service Valve S3WS* S3WS S3WU Evaporator Service Valve *) Requires additional adapter such as: /8 or /4 NT by 7/6 UNF flare male (see Other Accessories on page 8) S3 353_EN_R8.doc 6 / 9.8.
Selection Sheet For selection and sample request please fillin complete Note: not each combination is possible Type code S3 cutin / cutout roduct Name S3: Compact fixed setting pressostat SC: Customer special version of S3 Function A: ressure control, automatic, hp and lp R: ressure control, external manual reset, hp and lp W: ressure limiter, automatic TÜV Range 5 (high temperature Range 6, O, F, X only) B: ressure cutout, external manual reset TÜV Range 5 (high temperature, Range 6, O, F, X only) S: Safety pressure cutout, internal manual reset TÜV Range 5 (high temperature, Range 6, O, F, X only) ressure Connectors A: 7/6 UNF male (Range 5), with console G: G¼" female ass K: m cap. tube w. flare nut 7/6 UNF (Range 5), with console L: ¼ ODM solder with m cap. tube (Range 5), with console R: G¼" male ass S: 7/6" UNF female, Schrader depressor (Range 6 with snubber) U: 6 mm ODF azing, with console (Range 6 with snubber) X: /4" ODF azing, with console (Range 6 with snubber) ressure Range / Contacts Standard Contacts Microswitch : lp max 6 bar J: lp max 6 bar 3: lp max 6 bar L: lp max 6 bar 4: hp max bar M: hp max bar 5: hp max bar N: hp max bar 6: hp max 43 bar O: hp max 43 bar Gold lated Contacts Microswitch(Gold lated Contacts) A: lp max 6 bar S: lp max 6 bar C: lp max 6 bar U: lp max 6 bar D: hp max bar V: hp max bar E: hp max bar W: hp max bar F: hp max 43 bar X: hp max 43 bar S3 353_EN_R8.doc 7 / 9.8.
Accessories Cables with lug for S3, gasket molded into plug (I 65) Type CN No of leads Diameter of leads Temperature Range C Cable length mtr. S3N5 84 58.5 S3N 84 58 3.75 mm 5/8 3. S3N6 84 58 6. S3L5 84 583.5 S3L 84 584 3.75 mm 5/8 3. S3L6 84 585 6. S35 84 587.75 mm 5/8.5 S345 84 588.5 The following pictures show the different types of application: (in numbers from S3 see below, bk = black, bl = blue, = own) High ressure Application Low ressure Application S3Nxx bk 4 bl S3Nxx bk 4 bl S3xx 4 bl S3xx 4 bl S34xx 4 bl S34xx 4 bl S3 ins 4 S3 353_EN_R8.doc 8 / 9.8.
Other Accessories 85 7.5 7.5 Ø4. 3 7/6 UNF 3 7/6 UNF 5 3.5 33 SW 4 SW 4 3.5 Ø4.8 63.5 Angle acket (H446.) for two S3 CN: 83 77 3 /4 NT Adapter ¼ NTmale 7/6 UNFmale (for compressor direct mounting) CN: 8 35 /8 NT Adapter /8 NTmale7/6 UNFmale (for compressor direct mounting) CN: 8 36 Dimensions Dimensions Range 5, A E, J N, S W (in mm) Free standing 4 anel mounting 4 S3Nxx S3Nxx Reset 43 35 43 35 39 5 48 4.5 35 3 7.6 37 49 ressure Connection S 7/6 UNF female, with Schrader valve opener ressure Connection K m cap tube with flare nut 7/6 UNF Other ressure Connections Range 5, A E, J N, S W 5 8 8 A (Range 5) 7/6 UNFmale Ø 6, U 8 mm solder connection Ø 6 mm Ø /4" X 8 mm solder connection Ø ¼ Ø /4" L m cap tube Ø ¼ solder conn. S3 353_EN_R8.doc 9 / 9.8.
Dimensions Range 6, F, O, X (in mm) S3 4 8 8 8 S3Nxx 43 43 35 8 8 48 39 Ø 6 Ø ¼ Connection S 7/6 UNF female with Schrader valve opener Connection U 8mm solder connection Ø 6mm Connection X 8mm solder connection Ø ¼ EMERSON is not to be held responsible for erroneous literature regarding capacities, dimensions, applications, etc. stated herein. roducts, specifications and data in this literature are subject to change without notice. The information given herein is based on technical data and tests which EMERSON believes to be reliable and which are in compliance with technical knowledge of today. It is intended only for Emerson Electric GmbH & Co OHG ALCO CONTROLS ostfach 5 Heerstraße D733 Waiblingen Germany hone...497559 Fax...497559 www.emersonclimate.eu Benelux Germany, Austria & Switzerland France, Greece, Maghreb Italia Spain & ortugal UK & Ireland Sweden, Denmark, Norway & Finland Eastern Europe & Turkey oland Russia & Cis Balkan Romania Ukraine use by persons having the appropriate technical knowledge and skills, at their own discretion and risk. Our products are designed and adapted for fixed locations For mobile applications failures may occur. The suitability for this has to be assured from the plant manufacturer which may include making appropriate tests. This document replaces all earlier versions. hone: 3 ()77 34 34 49 ()69 659 33 ()4 78 66 85 7 39 96 78 34 93 4 3 75 44 () 635 876 6 49 ()48 99 49 ()48 99 48 () 458 95 7 495 98 98 385 () 56 38 75 4 364 73 7 38 44 4 9 99 4 Fax: 3 ()77 34 35 49 ()69 659 4 33 ()4 78 66 85 7 39 96 788 888 34 93 4 4 44 () 635 877 49 ()48 99 58 49 ()48 99 55 48 () 458 955 7 495 98 986 385 () 56 3879 4 364 73 98 38 44 4 9 99 8 S3 353_EN_R8.doc / 9.8.