GEA Bock EX-HG66e Series User manual

GEA Bock EX-HG66e
Assembly instructions
96463-08.2019-Gb
Translation of the original instructions
Device category 2 G
acc. to directive 2014/34/EU
EX-HG66e/1340-4 EX-HGX66e/1340-4 EX-HG66e/1340-4 HC
EX-HG66e/1540-4 EX-HGX66e/1540-4 EX-HG66e/1540-4 HC
EX-HG66e/1750-4 EX-HGX66e/1750-4 EX-HG66e/1750-4 HC
EX-HG66e/2070-4 EX-HGX66e/2070-4 EX-HG66e/2070-4 HC
EX-HG66e/1340-4 S EX-HGX66e/1340-4 S EX-HG66e/1340-4 S HC
EX-HG66e/1540-4 S EX-HGX66e/1540-4 S EX-HG66e/1540-4 S HC
EX-HG66e/1750-4 S EX-HGX66e/1750-4 S EX-HG66e/1750-4 S HC
EX-HG66e/2070-4 S EX-HGX66e/2070-4 S EX-HG66e/2070-4 S HC

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About these instructions
Read these instructions before assembly and before using the compressor. This will avoid misunder-
standings and prevent damage. Improper assembly and use of the compressor can result in serious
or fatal injury.
Observe the safety instructions contained in these instructions.
These instructions must be passed onto the end customer along with the unit in which the
compressor is installed.
GEA Bock GmbH
72636 Frickenhausen
Manufacturer
Contact
GEA Bock GmbH
Benzstraße 7
72636 Frickenhausen
Germany
Phone [phone]
Fax [phone]
[email protected]
www.gea.com
1 Safety 4
1.1 Identicationofsafetyinstructions
 1.2 Qualicationsrequiredofpersonnel
1.3 Safety instructions
1.4 Intended use
2 Product description 7
2.1 Short description
2.2 Ignition protection concept
2.3 Name plate
2.4 Type key
2.5 ATEX
identication/IECExidentication
3 Areas of application 12
3.1 Approved refrigerant
3.2 Important information on the use of hydrocarbons
3.3 Oil charge
3.4 Limits of application
Contents page

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Contents page
4Compressor assembly 16
4.1 Ignition source control of the compressor
4.2 Storage and transport
4.3 Setting up
4.4 Pipe connections
4.5 Pipes
4.6 Laying suction and pressure lines
4.7 Operating the shut-off valves
4.8 Operating mode of the lockable service connections
 4.9 Suctionpipelter
5
Electrical connection 21
5.1 Potentialequalization
5.2 Information for contactor and motor contactor selection
5.3 Terminal cross section for leads
5.4 Connectionofthedrivemotor
 5.5-5.7Circuitdiagrams
5.8
Electronic trigger unit INT69 G Ex
5.9 Connectionoftheelectronictriggerunit INT69 G Ex
5.10 Functional test of the electronic trigger unit INT69 G Ex
5.11 VericationoftheintrinsicsafetyofthePTChotgassensor
6 Commissioning 33
6.1
Preparations for start-up
6.2 Pressure strength test
6.3 Leak test
6.4 Evacuation
6.5 Refrigerant charge
6.6 Start-up
6.7 Avoidingliquidslugging
6.8 Preventing icing on the compressor
7 Maintenance 36
7.1 Preparation
7.2 Work to be carried out
7.3 Spare part recommendation
7.4 Screw connections
7.5 Decommissioning
8 Accessories 38
8.1 Capacityregulation
8.2 Oil sump heater
8.3 Oil differential pressure sensor INT250 Ex
9
Technical data 41
10 Dimensions and connections 42
EU Type Examination Certicate 44
IECEx
Certicate of Conformity 47
Service 51

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1|Safety
1.2 Qualications required of personnel
DANGER Indicates a dangerous situation which, if not avoided,
will cause immediate fatal or serious injury.
WARNING Indicates a dangerous situation which, if not avoided,
may cause fatal or serious injury.
CAUTION Indicates a dangerous situation which, if not avoided,
may cause fairly severe or minor injury.
ATTENTION Indicates a situation which, if not avoided,
may cause property damage.
INFO Important information or tips on simplifying work.
WARNING Inadequately qualied personnel poses the risk of accidents, the
consequence being serious or fatal injury. Work on compressors
must therefore only be performed by personnel with hereinafter
qualications and appropriate to additional qualication according
to EN 60079-14.
• For example, a refrigeration technician, refrigeration mechatronic engi-
neer. As well as professions with comparable training, which enables
personnel to assemble, install, maintain and repair refrigeration and
air-conditioning systems. Personnel must be capable of assessing the
work to be carried out and recognising any potential dangers.
1.1 Identication of safety instructions:

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1|Safety
1.3 Safety instructions
The GEA refrigerating compressors named in the title are intended for installation in machines that
weresetupinareasfallingundertheEUExplosionProtectionDirective1999/92/EC(operator direc-
tive). In the European Union, electrical as well as mechanical devices operated in explosive atmos-
pheres must fulfil what are known as ATEX (ATmospheres EXplosibles) conditions.
The compressors are specially designed for the category shown on the name plate in accordance with
the ATEX directive and may only be used in conformity with the conditions specified and documented
in the set-up area (explosion protection document). User safety is taken into account as a particular
focus of design. But it is permissible to start up the compressor only if it was installed in accordance
with these instructions and the entire system into which it is integrated has been inspected in accord-
ance with legal regulations and approved.
The declarations and remarks by GEA can only refer to the product itself. We assume that the appli-
cable regulations, standards and technical rules are followed in installation and during operation. The
plant constructor /operator must evaluate the interactions with other devices and components of the
system and with the environment, especially regarding potential ignition sources.
WARNING • Refrigerating compressors are pressurised machines and there-
fore require particular caution and care in handling.
• Risk of burns! Depending on the operating conditions, surface
temperatures of over 60 °C on the pressure side or below 0 °C on
the suction side can be reached.
• The maximum permissible overpressure must not be exceeded,
even for testing purposes.
• The compressor may be operated only if it is free of defects!
• No work may be performed when an explosive atmosphere is
present!
• Smoking, re and open ame are strictly prohibited! Mobile tele-
phones must be switched off!
• Strongly charge-generating processes must be excluded within
2 meters. The contact of rapidly moving particles with the sur-
face of the compressor must be avoided with certainty (e.g.
pneumatically moved dust, owing uids, direct ventilation, belt
drives, brushes, foils, etc.).
• Perform installation work only if no damage, leaks and /or
appearances of corrosion can be recognized.

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1|Safety
These assembly instructions describe the compressors named in the title manufactured by GEA. The
compressor is intended for use in refrigeration systems inside explosion-endangered areas under
thedesignationspeciedonthenameplateinaccordancewiththeEuropeanATEX Directives.
Use of the specied refrigerants as well as observance of the operating limits and listed stand-
ards must be ensured in any case. Likewise, all accessories available from, approved and specially
marked by GEA are exclusively approved, according to their intended use, for attachment to and
operationwithGEAcompressorsofappliancecategory2inaccordancewithDirective2014/34/EU.
1.4 Intended use
WARNING Any other use of the compressor and its approved accessories is
prohibited! The ATEX permit is voided if the compressor is used
outside the operating limits or undergoes inadmissible design
changes!

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2|Product description
2.1 Short description
• Semi-hemetic six-cylinder reciprocating compressor with oil pump lubrication.
• For use in explosion-endangered areas.
Fig. 1
Fig. 2
Oil sight glass
Valve plate
Cylinder
cover
Discharge
shut-off
valve
Oil pump
Terminal box
Potential
equalization
Suction
shut-off
valve
Drive section
Motor
section
Dimension and connection values can be found in chapter 10
Transport
eyelet
Name plate

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2|Product description
2.2 Ignition protection concept
In accordance with Directive 2014/34/EU, GEA ATEX compressors are suitable for use in device
category 2 for explosive gas atmospheres up to temperature class T3 and explosion hazard subgroup
IIB /IIC.
The entire compressor, including motor, is perceived as technically tight and therefore does not need
an ignition protection.
To prevent ignition risk caused by working materials also during system malfunctions, all used work-
ingmaterialshavetomeettherequirementsforthetemperatureclassofthecompressor.Thesurface
temperature of the compressor may not exceed 80 % of the ignition temperature of the working
material.Forthisreasonallworkingmaterialsneedtohaveanauto-ignitiontemperatureof>250°C.
To protect against high temperatures that may occur during incorrect operation or faults at the com-
pressor, the areas with the highest heat potential are controlled with temperature sensors (Ex b).
The installation of the electronic control unit INT69 EX2 and the safety barrier,
both included in the scope of supply, is therefore absolutely necessary.
Theconnectionareasforloadcircuitsaredesignedaccordingtotherequirementsoftheappliance
category in Ex e.The circuits for the temperature sensors of the used ignition source control Ex b have
to be intrinsically safe to prevent inadmissibly high thermal or electric values. To ensure the intrinsic
safety, the included safety barrier has to additionally be integrated in the electric circuit according to
this assembly instruction. The terminal board is designed for the protection type Ex de. The whole
electricconnectionareaisprotectedbyahousingthatcomplieswiththerequirementsfortheprotec-
tion type increased safety (Ex e).
Thescopeofdeliveryofthestandardcompressorcomprisesaconductivepaintnish,thatissuitable
fortheuseinexplosiongroupIIC.Ifthecompressorisdeliveredwiththeaccessory"OffshorePaint
Finish",theapplicationisrestrictedtoexplosiongroupIIB.

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2|Product description
Accessories
Heating elements for the compressors to protect against explosion risks are designed in the pro-
tection types increased safety (Ex d) and have to have to be mounted stationary at the designated
areas in the compressor housing. The heating elements can be operated without temperature- and
oillevelcontrolsincethethermaltypetestingbythemanufacturerveriedthattheheatingelements
prevent the exceeding of the temperature class of the compressor. The control has to be carried
out in a way that the heating element can only be operated during shutdown of the compressor.
The magnetic coil of the capacity regulator is designed in the protection type encapsulation (Ex m) to
protect against explosion risks. In addition, the connecting areas of the coil are placed in a housing
thatcomplieswiththerequirementsoftheprotectiontypeincreasedsafety(Exe).
The oil differential pressure sensor INT250 Ex from Kriwan is executed as a simple electrical operating
device without a recognised ignition protection type. To ensure reliable operation, however, it must be
equippedasanintrinsicallysafeelectricalcircuitwithswitchingrepeater.Pleasenotethattheplastic
housing of the INT250 Ex can be electrically charged by means of charge-generating processes (e.g.
cleaningwithadrycloth,directadditionalventilationviafanetc.).Accordingly,theoperatorisrequired
to take measures so that ignition hazards can be reliably ruled out.
Equipment Type of ignition protection
Terminal box Ex e
Terminal board Ex d+e
Through terminals in the terminal box Ex e
Cable/lineentrances/plug Exd/e
Magnetic coil Ex e mb
Oil sump heater Ex d
Oil differential pressure sensor INT250 Ex Ex i
HotgasPTCsensor Ex i

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G
 
  
 
  
 
 
II 2G Ex de ia mb IIC TJ Gb / EPS 17 ATEX 1002 X
Ex de ia mb IIC TJ Gb / IECEx EPS 17.0001 X (E g
 
°°°°
  

 1 
180,0 3 
  

 1 
  3 
  
2|Product description
/
HG
EX 62070-
-4 SX
2.4 Type key (example)
¹) HG-HermeticGas-Cooled(suctiongas-cooled)
²) X - Esteroilfilling(HFCrefrigerant),e.g.R134a,R404A,R507,R407C)
³) S - More powerful motor, e.g. air-conditioning applications
Fig. 3
HC
for hydrocarbons
Motor variant ³)
Number of poles
Swept volume
e-series
Number of cylinders
Size
Esteroillling²)
Series ¹)
Ex-design
}
}
1 Typedesignation 6 Voltage,circuit,frequency
2 Machine number 7 Nominal rotation speed
3 Maximum operating current 8 Displacement
4 Startingcurrent(Rotorblocked) 9 Voltage,circuit,frequency
Y: Part winding 1 10 Nominal rotation speed
YY: Part windings 1 and 2 11 Displacement
5 ND(LP):max.admissibleoperating 12 Oiltypelledatthefactory
pressure (g) low pressure side 13 Terminal box protection type
HD (HP): max. admissible operating 14 Permissible ambient temperature
pressure (g) high pressure side
Electrical accessories can change
the IP protection class!
Observe the limits of
application diagrams!
50 Hz
60 Hz
1
2
3
4
5
6
7
8
9
10
12
13
11
14
2.3 Name plate (example)
6 e

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2|Product description
2.5 ATEX identication / IECEx identication
2G T3 Gb
II ia IIB/IIC
Ex
demb
Explosion group II for Ex-endangered
areas (not underground buildings)
Suitability for gas-explosive area
Device category 2 (= zone 1)
TemperatureclassT3(max.200°C)
Equipmentprotectionlevel
Explosion subgroups,
IIB=Offshorepaintnish
IIC=ESDpaintnish
Intrinsicallysafeequipment
Increased safety
Flameproof enclosure, heater (option)
Europ. explosion protection acc. to
Direc.2014/34/EU
Encapsulation, magnetic coil (option)

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2|Product description
EPS 17 ATEX 1002 X / IECEx EPS 17.0001 X
Bureau Veritas
ConsumerProductsServices
Germany GmbH
International explosion protection
Yearoftest/Testreportnumber
Year of test
Bureau Veritas
ConsumerProductsServices
Germany GmbH
Special conditions:
see"ConditionsofCertication"
Special conditions:
seepoint17oftheECtype
examinationcerticate
Test report number
ATmospheres EXplosibles european
explosion protection
ATEX approval type IECEx approval type

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3|Areas of application
3.1 Approved refrigerant
•  HFKW/HFC:  R134a,R404A,R507,R407C
•  (H)FCKW/(H)CFC: R22
• Hydrocarbons : R290, R1270
INFO Used refrigerants have to have a self-ignition temperature of
> 250 °C.
3.2 Important information on the use of hydrocarbons
Hydrocarbons (combustible refrigerants) may be used in the compressors named in the title only if all
relevant and applicable regulations, standards and technical rules are followed. National safety regu-
lations must be observed. In addition, we refer to the following applicable standards and regulations:
EN378,BGR500,TRBS2152,ECDirectives1999/92/ECand2014/34/EU.
The compressor and the refrigeration system must be permanently equipped with clear, identical
labels /plates (ISO3864) that state that combustible refrigerants are used. This warning plate must be
unremovably attached to the compressor.
A hazard analysis in accordance with the Operational Safety Ordinance must be performed for the
set-up location. Use and handling of the refrigeration system and compressor are to be governed in
the explosion protection document.
Installation, placement into operation, service and repair (as permitted by the manufacturer) may only
be performed by personnel who have been specially trained on combustible refrigerants.
If the compressor has to be removed from the system for inspection /maintenance /repair, the remaining
refrigerantmustbesuctionedoutandthecompressorevacuated,lledwithnitrogen(<0.5bar)and
closedgas-tight.Thecompressormustbeequippedwithatagthatclearlystatesthatthecompressor
was operated with combustible refrigerant (name the refrigerant).
If the system contains combustible refrigerants or residues, extreme caution must be exercised when
workingonthecompressorduetothedangerofexplosion.Thisappliesespeciallyfortheuseofre,open
ameorotherignitionsources(e.g.electronicdevices,mobiletelephones,staticcharges,sparks,...).
During maintenance and repair, it must be noted that hydrocarbon residues may remain dissolved in
theoil.Inadditionuseddryerscontainbottomsoftheinammablerefrigerants.Flushthedryerwith
nitrogen and supply it to the recycling.
It should be noted that the solubility of hydrocarbons in oil can be very high, especially at high suction
pressures.Ahigh-viscositylubricantmayberequired,dependingontheapplicationandexperience.
The lubricant must be released for use by GEA. Depending on the application, a pump-down switch
should also be added (e.g. when the refrigeration system is set up outside).

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3|Areas of application
Compressorswithesteroillling(FUCHSRenisoTritonSE55)aremarkedwithanXin the type
designation (e.g. EX-HGX66e/2070-4).CompressorswithoilllingFUCHSRenisoSnyth68are
marked with HC(e.g.EX-HG66e/2070-4HC).
Oil level: The oil level from the factory reaches the upper edge of the sight glass.
The oil level must be regulated in operation; if necessary to achieve a correct oil level (see Fig. 4),
oil may have to be drained off or added.
Operate compressors only with the approved refrigerants and the corresponding assigned and
approved oils. Other combinations (e.g. R22 with ester oils) are not permitted!
 Conversiontoanotherrefrigerant /oil is not permitted!
ATTENTION The oil level must be in the
visible part of the sight glass;
damage to the compressor is
possible if overfilled or under-
filled!
max.
min.
Oil level
The following oil grades are approved for the compressor:
3.3 Oil charge
Refrigerant Oil grade
R22 FUCHSRenisoSP46
R134a, R404A, R507, R407C FUCHSRenisoTritonSE55
R290, R1270 FUCHSRenisoSynth68
INFO Used refrigerant oils have to have a self-ignition temperature of
> 250 °C.
Fig. 4Fig. 4
EX-HG66e
2.4 Ltr.
~
~

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3|Areas of application
3.4 Limits of application
ATTENTION Compressor operation is possible within the operating limits.
These can be found in GEA Bock compressor selection tool (VAP)
under vap.gea.com. Observe the information given there.
- Max. permissible discharge end temperature 140 °C.
- Max. permissible switching frequency 12 x / h.
- A minimum running time of 3 min. steady-state condition
(continuous operation) must be achieved.
Suction gas overheating ∆toh:
The correct setting of the suction gas overheating temperature
∆toh at the compressor entrance is of decisive importance:
Too low ∆toh => danger of liquid operation
Too high ∆toh => danger of compressor overheating
∆toh min = 7 - 10 K, individual adjustment required.
Permissible ambient temperature range −20 °C to +60 °C.
Permissible ambient temperature range when using a capacity
regulator: −20 °C to +50 °C.
Avoid continuous operation near the limits.
For operation with capacity regulator:
- Continuous operation, when the capacity regulator is activated,
is not permissible and can cause damage to the compressor.
- The suction gas superheat temperature may need to be reduced
or set individually when operating near to the threshold
.
- When the capacity regulator is activated, the gas velocity in the
system can not under certain circumstances ensure that suf-
cient oil is transported back to the compressor.
For operation with frequency converter:
- the maximum current and power consumption may not
be exceeded. During operation above the mains frequency
the application limit can be restricted.
Variable frequency range : 25 - 60 Hz.
During operation in the vacuum range, there is a danger of air enter-
ing on the suction side. This can cause chemical reactions, pressure
rise in the condenser and an excessive pressure gas temperature
as well as shifting of the refrigerant ignition limit into the critical
range. Avoid absolutely any entry of air!

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4|Compressor assembly
4.1 Ignition source control of the compressor
INFO • New compressors are factory-lled with inert gas. Leave this ser-
vice charge in the compressor for as long as possible and prevent
the ingress of air.
•Check the compressor for transport damage before starting any
work.
•Before starting work, obtain written work release.
•Observe national regulations when setting up explosion-protected
systems (within the EU: ATEX Directive 1999/92/EG, EN 60079-14,
EN 60079-17 a.o.).
• Use only tools permitted for explosion-protected systems (within
the EU, in accordance with EN 1127-1).
• Observe work safety rules (TRGS 727, e.g. protective shoes,
clothing etc.)!
To protect againstanexceedingoftemperaturetheprotectiontypeignitionsourcecontrol"b"is
used at the compressor. Via sensors, the areas with the highest heat potential at every cylinder
cover are controlled. Additionally, the temperature of the motor winding is controlled by the safety
device INT69 EX2.
Thepermissiblelimittemperaturesfornormaloperationofthecompressorweresetwith130°Cfor
themotorandwith140°Cforthehotgassideofthecylindercover.Ifoneofthosevaluesisexceeded,
the compressor is shut down by the control device INT69 EX2. Besides the installation according to
wiring diagram, the operator /installer does not have to regard other parameters for the correct func-
tioning of the ignition protection system. A function check however has to be carried out before every
startup of the compressor according to section 5.10 of this assembly instruction.
For a safe function of the ignition source control the INT69 EX2 has to be installed according to the
wiringdiagramsg.20and21.Checkthefunctionoftheignitionprotectionsystemaccordingtosec-
tion 5.10. Defective sensors or ignition protection systems have to be replaced before reconnection
of the compressor.
Operation of the compressor without ignition source control is not permitted!
After shutdown by the INT69 EX2, precise error diagnostics and error correction is necessary.
The INT69 EX2 has a restart interlock that can only be interrupted by means of voltage inter-
ruption.

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4|Compressor assembly
4.3 Setting up
 Setuponanevensurfaceorframewithsufcientload-
bearing capacity. Only set up on a slant after consulting
with the manufacturer.
Single compressor preferably on vibration damper.
Lightening protection: If the compressor is set up outdoors,
a lightening protection concept has to be integrated.
 Provideadequateclearanceformaintenancework.
 Ensureadequatecompressorventilation.
Do not operate in an aggressive and /or corrosive atmosphere.
Fig. 7
Fig. 8
Fig. 9
Fig. 10
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B
A
1 2
3
4
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4
3
2
1
A
B
Tol.-Ang. DIN ISO 2768-mK
Ra Rz
Maß Passung
Freigabe
Alternativbezug:
Baumustergeprüft
Teil inaktiv
Lieferantenzeichnung
-
-
K.-Auftrag:
PL:
Zeichnung ungültig
Entwicklungsstand
Teil keine Serie
120
400
±0.5
über 0.5
bis 6
Benzstraße 7 - 72636 Frickenhausen - Germany - www.bock.de
-
-
Unbemaßte Radien:
-
Diese Zeichnung ist unser Eigentum!
Sie darf ohne unsere Genehmigung weder nach-
gebildet, vervielfältigt, oder Dritten Personen zu-
gänglich gemacht werden. Der Nachbau nach
dieser Zeichnung, oder an Hand der nach dieser
Zeichnung hergestellten Gegenstände durch den
Abnehmer oder Dritte ist nicht gestattet.
Wir behalten uns alle Rechte, gemäß DIN ISO 16016
an dieser Zeichnung vor.
Bearb.
Datum
Änderungs-Nr.
Werkstoff:
Ausgangsteil, bzw. Rohteil:
--
Gepr.
Name Datum
19.04.
Werkstückkanten
DIN ISO 13715
Ersatz für:
Ersetzt durch:
Erstellt
2010
Geprüft
-
Kurz
Zone
1/x
Oberflächenbehandlung / Härte:
-
Blatt:
Änderungsbeschreibung
400
Benennung:
±0.8
1000
30 6
-
±0.3
120
30
±0.2
Zeichn.-Nr. Teile-Nr.
Oberflächenangaben ISO 1302
x.xxxx-xxxxx.x
Zust.
Gußtoleranzen:
Gewicht: (kg)
±0.1
Maßstab:
1:1
Wasserwaage
für Indesign
Der Lieferant muß sicherstellen, dass die Ware in
einwandfreiem Zustand angeliefert wird (Korrosions-
schutz, Verpackung für sicheren Transport).
Rz 25
Rz 160
s
25
z y x w u t
0,05
Rz 1,6
0,3
0,7
1,6
2
Rz 16
6,3
Rz 63
Rz 6,3
Rz 12,5
F:\user\kurz\3D Sachen\3D Teile\Zeichnungen\Wasserwaage
Sun protection: If the compressor is set up outdoors, it has
to be protected from direct sunlight.
Fig. 11
?
4.2 Storage and transport
Use transport eyelet.
Do not lift manually!
Use lifting gear!
 Storageat(−30°C)-(+70°C),maximumpermissiblerelativehumid-
ity 10 % - 95 %, no condensation
Do not store in a corrosive, dusty, vaporous atmosphere or in a com-
bustible environment.
Fig. 6
Fig. 5
ATTENTION Fittings (e.g. pipe holders, additional units, mounting parts etc.) on
the compressor are not permissible!

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4|Compressor assembly
4.5 Pipes
The pressure and suction shut-off valves have graduated inside di-
ameters so that pipes in the common millimeter and inch dimensions can
be used. The pipe will be inserted more or less deep, depending on the
dimension.
The connection diameters of the shut-off valves are designed for maximum
compressor performance. The actual required pipe cross section must
be matched to the output. The same applies for non-return valves.
Fig.12: graduated
internal diameter
4.4 Pipe connections
ATTENTION An explosive atmosphere must not be present!
Do not solder as long as the compressor is under pressure.
Superheating can damage the valve. Remove the pipe supports
therefore from the valve for soldering and accordingly cool the
valve body during and after soldering.
Only solder using inert gas to inhibit oxidation products (scale).
Pipes and system components must be clean and dry inside and free of scale, swarf and layers of
rust and phosphate. Only use air-tight parts.
Lay pipes correctly. Suitable vibration compensators must be provided to prevent pipes being
cracked and broken by severe vibrations.
Ensure a proper oil return.
Keep pressure losses to an absolute minimum.

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Rigid
fixed point
As short
as possible
4|Compressor assembly
4.7 Operating the shut-off valves
Before opening or closing the shut-off valve, release the valve spindle seal by approx. 1/4of a turn
counter-clockwise.
After activating the shut-off valve, re-tighten the adjustable valve spindle seal clockwise.
Fig. 14 Fig. 15
4.6 Laying suction and pressure lines
Fig. 13
A rule of thumb: Alwayslaytherstpipesectionstartingfromtheshut-offvalvedownwards and
parallel to the drive shaft.
ATTENTION Improperly installed pipes can cause cracks and tears which can
result in a loss of refrigerant
INFO Proper layout of the suction and pressure lines directly after the
compressor is integral to the smooth running and vibration behav-
iour of the system.
Valve spindle seal
Release
Tighten

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4.8 Operating mode of the lockable service connections
4|Compressor assembly
Pipe connection
Pipe connection
Fig. 16
Opening the shut-off valve:
Spindle: turn to the left (counter-clockwise) as far as it will go.
—>Shut-offvalvecompletelyopened/serviceconnectionclosed.
Fig. 17
Opening the service connection
Spindle: Turn 1/2- 1 turn to the right clockwise.
—>Serviceconnectionopened/shut-offvalveopened.
Connection
blocked
Spindle
Spindle Connection
open
Compressor
Compressor
Service connection
closed
Service connection
opened
Afteractivatingthespindle,generallytthespindleprotectioncapagainandtightenwith14-16Nm.
This serves as a second sealing feature during operation.
For systems with long pipes and higher degree of contamination, a lter on the suction-side is
recommended.Thelterhastobebereneweddependingonthedegreeofcontamination(reduced
pressure loss).
4.9 Suction pipe lter