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SB-509-2

24

5.3

Connecting a discharge gas temperature
sensor

Protection device P Fuchs KFD2-GUT-Ex1.D
(or device with identical functions) required.

• Connect the discharge gas temperature sensor (see

chapter Mounting, page 20, "Simple electrical equip-
ment") according to the schematic wiring diagram
(see chapter Schematic wiring diagrams OS.(A)74.-
EX, page 26
).

• Break point 105°C.

DANGER

Risk of explosion due to hot surfaces!
The surface temperature of 130°C must not be
exceeded at any point!

DANGER

Risk of explosion due to an incorrectly connec-
ted discharge gas temperature sensor!
Only use a discharge gas temperature sensor
suitable for the use in a potentially explosive at-
mosphere and connect it together with the sec-
tion switch amplifier!

5.4

Oil flow switch

with Reed contact. Included in the oil injection kit.

• Incorporate the oil flow switch (see chapter Mount-

ing, page 20, "Simple electrical equipment") into the
circuit according the the schematic wiring diagram.

• Use the control device OFC for bridging the oil flow

switch when starting the system (20 s) and in case of
lack of oil for less than 3 seconds (see chapter
Schematic wiring diagrams OS.(A)74.-EX, page
26).

DANGER

Risk of explosion due to an incorrectly connec-
ted oil flow switch!
Only use an oil flow switch which is suitable for
the use in a potentially explosive atmosphere
and connect it together with the section switch
amplifier!

5.5

Thermostat at the ECO suction line

• Break point max. 105°C

• Incorporate the thermostat (see chapter Mounting,

page 20, "Simple electrical equipment") into the in-
trinsically safe circuit according to the schematic wir-
ing diagram.

DANGER

Risk of explosion due to high temperatures at
the ECO suction line!
During operation while the economiser / liquid
injection is switched off, there may be inadmiss-
ible high temperatures at the ECO suction line.
Monitor the temperature of the ECO suction line
with a thermostat!

DANGER

Risk of explosion due to an incorrectly connec-
ted oil thermostat at the ECO suction line!
Only use a thermostat which is suitable for the
use in a potentially explosive atmosphere and
connect it together with the section switch amp-
lifier!

Summary of Contents for OSK/N7441-EX

Page 1: ...tz Sonderausf hrung Deutsch 2 Open drive screw compressors in special explosion proof design English 17 OSK N7441 EX OSK N7451 EX OSK N7461 EX OSK N7471 EX OSK NA7452 EX OSK NA7462 EX OSK NA7472 EX Do...

Page 2: ...z leinspritzung f r Ex gesch tzte Bereiche 7 4 5 Wellenabdichtung 7 5 Elektrischer Anschluss 8 5 1 Verdichtermotor 8 5 2 Hoch und Niederdruckw chter HP und LP 8 5 3 Druckgastemperaturf hler anschlie e...

Page 3: ...1 und 2 ATEX entsprechend EU Richtlinie 1999 92 EG ATEX 137 ausgef hrt und gen gen den Anforderun gen der ATEX Kennzeichnung Ex II 2G Ex h IIC T4 Gb X Sie sind nach dem aktuellen Stand der Technik und...

Page 4: ...en Ger te nicht in der N he von hochaufladenden Prozessen betreiben z B mechanische Trenn prozesse Ma nahmen gegen elektrostatische Aufladung von nichtmetallischen Bauteilen Werkzeugen Hilfsmitteln so...

Page 5: ...ng m ssen jedoch im sicheren Bereich durch Vorschalten einer ATEX bescheinigten Energiebegren zung Trennschaltverst rker gesichert werden Diese eigensicheren Schaltkreise sind besonders zu kenn zeichn...

Page 6: ...ter Druck Schwere Verletzungen m glich Verdichter auf drucklosen Zustand bringen Schutzbrille tragen Blindflansche entfernen HINWEIS Verdichterschaden m glich Magnetspulen exakt vertikal montieren Die...

Page 7: ...d mit Trennschalt verst rker anschlie en 4 5 Wellenabdichtung Die Verdichter OS A 74 EX sind mit einer speziellen Wellenabdichtung ausgestattet Eine integrierte lvor lage verhindert dass Au enluft und...

Page 8: ...tz ge gen berschreiten der Maximalen Schalth ufig keit vorsehen siehe Betriebsanleitung SB 500 GEFAHR Explosionsgefahr durch Ber hren der L ufer an Geh useteilen Bei abnormaler Betriebsweise beispiels...

Page 9: ...den Einsatz in explosi onsf higer Atmosph re geeigneten Druckga stemperaturf hler verwenden und mit Trenn schaltverst rker anschlie en 5 4 ldurchflussw chter mit Reed Kontakt Im Bausatz leinspritzung...

Page 10: ...erst rker an schlie en 5 6 Erdung Alle leitf higen Bauteile erden z B Verdichter Kupplungsgeh use Grundrahmen K ltemittel und lleitungen sowie labscheider GEFAHR Explosionsgefahr durch Entladung elekt...

Page 11: ...te Motorst rung bertemperatur Pha senausfall H3 Leuchte ldurchflussst rung H4 Leuchte lniveaust rung H7 Leuchte falsche Drehrichtung J1 Trennschaltverst rker Pepperl Fuchs KFD2 SR2 Ex1 W 1 Anschluss K...

Page 12: ...1 W1 V1 U1 M3 M1 S2 L1 L2 L3 F4 K1 22 B1 N J1 L R1 Thermostat abh ngig vom Heizungstyp Thermostat depends on oil heater type K4 34 K1 22 N L OFC A1 M1 T11 T12 F7 M2 A2 T2 H7 N J1 L F16 R2 II 2 G H3 23...

Page 13: ...Y8 Y6 Y7 K2 K3 0 5 s 120 s L1 2 L F18 J1 N B3 F6 P B2 K2T 38 K4T 31 Y3 H4 K4 K2T K2 29 K3T 24 K3 28 K1 22 K4 34 K1 22 K4T 31 N J1 L K2 29 F8 N J1 L F12 K1 22 41 42 P 2 2 2 13 27 II 2 G II 2 G II 2 G...

Page 14: ...scher Aufladung Nur f r explosive Atmosph ren geeignete Ger te verwenden und diese entsprechend im betrei berseitigen Explosionsschutzdokument bewer ten und festhalten Ma nahmen gegen elektrostatisch...

Page 15: ...Kupplungsh lften ohne Drehmoment gegen einander bis zum Anschlag drehen Markierung auf beiden H lften anbringen Kupplungsh lften ebenfalls ohne Drehmoment bis zum Anschlag in die andere Richtung drehe...

Page 16: ...m Bausatz Wellenabdichtung en haltene Montageh lse verwendet werden Montageh lse ber die Welle bis zum Anschlag auf setzen GEFAHR Explosionsgefahr durch schadhafte Dichtlippe Neue statische Einheit be...

Page 17: ...oof areas 22 4 5 Shaft seal 22 5 Electrical connection 23 5 1 Compressor motor 23 5 2 High and low pressure limiter HP and LP 23 5 3 Connecting a discharge gas temperature sensor 24 5 4 Oil flow switc...

Page 18: ...n The compressors have been designed especially for the use in zones 1 and 2 ATEX according the EU Dir ective 1999 92 EC ATEX 137 and comply with the re quirements of the ATEX marking Ex II 2G Ex h II...

Page 19: ...rate devices near highly energetically charged processes e g mechanical separation processes Take measures against electrostatic charging of non metallic components tools auxiliaries and clothing Wear...

Page 20: ...they must be protected in a safe area by connecting an ATEX certified power limitation sec tion switch amplifier These intrinsically safe circuits must be specially marked blue cable and the wiring is...

Page 21: ...e Depressurize the compressor Wear safety goggles Remove the blind flanges NOTICE Risk of compressor damage Mount the solenoid coils in a way that they are exactly vertical The explosion proof solenoi...

Page 22: ...ft seal The compressors OS A 74 EX are equipped with a special shaft seal An internal oil barrier keeps sur rounding air and thus explosive atmosphere away from the sliding face of the shaft seal The...

Page 23: ...te see Operating Instructions SB 500 DANGER Risk of explosion when the rotors come into contact with housing parts In the case of an abnormal operating mode e g lack of oil it cannot be excluded that...

Page 24: ...control device OFC for bridging the oil flow switch when starting the system 20 s and in case of lack of oil for less than 3 seconds see chapter Schematic wiring diagrams OS A 74 EX page 26 DANGER Ris...

Page 25: ...d list them in the explosion protection document of the end user Take measures against electrostatic charging of non metallic components tools auxiliaries and clothing Wear for example antistatic clot...

Page 26: ...ure excess temperat ure phase failure H3 Signal lamp oil flow fault H4 Signal lamp oil level fault H7 Signal lamp wrong rotation direction J1 Section switch amplifier Pepperl Fuchs KFD2 SR2 Ex1 W 1 co...

Page 27: ...1 V1 U1 M3 M1 S2 L1 L2 L3 F4 K1 22 B1 N J1 L R1 Thermostat abh ngig vom Heizungstyp Thermostat depends on oil heater type K4 34 K1 22 N L OFC A1 M1 T11 T12 F7 M2 A2 T2 H7 N J1 L F16 R2 II 2 G H3 23 10...

Page 28: ...Y6 Y7 K2 K3 0 5 s 120 s L1 2 L F18 J1 N B3 F6 P B2 K2T 38 K4T 31 Y3 H4 K4 K2T K2 29 K3T 24 K3 28 K1 22 K4 34 K1 22 K4T 31 N J1 L K2 29 F8 N J1 L F12 K1 22 41 42 P 2 2 2 13 27 II 2 G II 2 G II 2 G II 2...

Page 29: ...table for potentially explos ive atmospheres and assess and list them in the explosion protection document of the end user Take measures against electrostatic charging of non metallic components tools...

Page 30: ...the coupling manufacturer Turn both clutch halves without torque against each other to the stop Mark both halves Turn clutch halves also without torque to the other direction to the stop Measure radi...

Page 31: ...included in the kit of the shaft seal Place the mounting sleeve on the shaft until reaching the stop DANGER Risk of explosion due to a damaged lip seal Slide the new stationary unit over the mounting...

Page 32: ...ra e 15 71065 Sindelfingen Germany Tel 49 0 70 31 932 0 Fax 49 0 70 31 932 147 bitzer bitzer de www bitzer de nderungen vorbehalten nderungen vorbehalten Subject to change80450602 08 2018 80450602 08...

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