BOCK BOCK HG12P User manual

 
 
 
 
 
 
 
 
BOCK HG 12 P (HC/LG)





BOCK®

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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 compres-
sor is installed.
Bock GmbH
72636 Frickenhausen
Bock GmbH
Benzstraße 7
72636 Frickenhausen
Germany
Phone [phone]
Fax [phone]
www.bock.de
[email protected]
Manufacturer
Contact
Contents Page
1 Safety 4
 1.1 Identicationofsafetyinstructions
 1.2 Qualicationsrequiredofpersonnel
1.3 General safety instructions
1.4 Intended use
 2 Safetyinstructionsforuseofammablerefrigerants 6
2.1 Safety instructions
2.2 Qualicationsrequiredofpersonnel
3 Product description 7
3.1 Short description
3.2 Name plate
3.3 Type key
3.4 Type key HC compressors
3.5 Type key LG compressors

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Contents Page
 4 Areasofapplication 10
4.1 Refrigerants
4.2 Oil charge
4.3 Limits of application
5AreasofapplicationonHCandLGcompressors 11
5.1 Refrigerants
5.2 Oil charge
5.3 Limits of application
6Compressorassembly 12
6.1 Storage and transport
6.2 Setting up
6.3 Pipe connections
6.4 Pipes
6.5 Laying suction and pressure lines
 6.6 Suctionpipelterandlterdrier
6.7 Operating the shut-off valves
6.8 Operating mode of the lockable service connections
 7 Electricalconnection 15
7.1 Information for contactor and motor contactor selection
7.2 Connection of the driving motor
7.3 Circuit diagram for direct start 230 V Δ/ 400 V Y
7.4 Electronic trigger unit INT69 G
7.5 Connection of the electronic trigger unit INT69 G
7.6 Functional test of the electronic trigger unit INT69 G
7.7 Electronic trigger unit INT69 G on HC and LG compressors
7.8 Oil sump heater on HC and LG compressors
8 Commissioning 21
8.1 Preparations for start-up
8.2 Pressure strength test
8.3 Leak test
8.4 Evacuation
8.5 Refrigerant charge
8.6 Start-up
8.7 Avoiding slugging
8.8 Connection of oil level regulator
9 Maintenance 23
9.1 Preparation
9.2 Work to be carried out
9.3 Spare parts recommendation/accessories
9.4 Lubricants / oil
9.5 Decommissioning
9.6 Additionalinformationwhenusingammablerefrigerants
 10 Technicaldata 25
 11 Dimensionsandconnections 26
 12 Declarationofincorporation 27
13 Service 28

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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
isthereforereservedforpersonnelwhichisqualiedtoworkon
pressurizedrefrigerantsystems:
• For example, a refrigeration technician, refrigeration mechatronic
engineer. 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
1.4 Intended use
1.3 Generalsafetyinstructions
WARNING Riskofaccidents.
Refrigeratingcompressorsarepressurisedmachines andassuch
callforheightenedcautionandcareinhandling.
The maximum permissible overpressure must not be exceeded,
evenfortestingpurposes.
Riskofburns!
- Dependingontheoperatingconditions,surfacetemperaturesof
over60°Conthedischargesideorbelow0°Conthesuction
sidecanbereached.
-Avoidcontactwithrefrigerantnecessarily.
Contactwithrefrigerantcancausesevereburnsandskin
damage.
WARNING The compressor may not be used in potentially explosive
environments!
These assembly instructions describe the standard version of the compressor named in the title
manufactured by Bock. Bock refrigerating compressors are intended for installation in a machine
(within the EU according to the EU Directives 2006/42/EC Machinery Directive and 2014/68/EU Pres-
sureEquipmentDirective).
Commissioning is permissible only if the compressor has been installed in accordance with these as-
sembly instructions and the entire system into which it is integrated has been inspected and approved
in accordance with legal regulations.
The compressors are intended for use in refrigeration systems in compliance with the limits of
application.
Onlytherefrigerantspeciedintheseinstructionsmaybeused.
Anyotheruseofthecompressorisprohibited!

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2 |Safety instructions for use of
flammable refrigerants
DANGER • Explosion and fire risk! Hydrocarbons and synthetic HFO
refrigerants are colourless, combustible gases which
occur naturally and which are explosive in a certain blend!
• Hydrocarbons are classied into the safety group A3 (highly-
inammablerefrigerant)accordingtoEN378.
•HFOrefrigerantsareclassiedintothesafetygroupA2L(hardly-
inammablerefrigerant)accordingtoEN378.
Astheyareheavierthanair,theoperatinglocationmustbeabove
groundleveltoallowunrestricteddischargeofthegas.
• By means of a risk and hazard analysis, appropriate technical
measuresaretobeidentifiedinordertoachievesufficientrisk
reduction. If necessary, a classification of the hazardous areas
accordingtoEN60079-10-1shouldbecarriedout.Iftherefriger-
antconcentrationexceedsthevalueof25%ofthelowerflamma-
bilitylimit(LEL),allequipmentinthehazardousareawhichisnot
permittedforoperationinhazardousareasmustbeimmediately
switchedoffwithoutanyvoltage.
•Useonlysuitableequipmentapprovedforflammablerefrigerants.
•Observethenationalregulations.
INFO Semi-hermeticcompressorsaretobeclassifiedas"technically
tight"(seee.g.TRBS2152part2/TRGS722).
2.1 Safety instructions
2.2 Qualicationsrequiredofpersonnel
WARNING Inadequatelyqualiedpersonnelposes theriskofaccidents,the
consequencebeingseriousorfatalinjury.Workonthecompressor
maytherefore onlybe carriedoutby personswho aretrainedin
handlingammablerefrigerants.

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3|Product description
• Semi-hermetic two-cylinder reciprocating compressor with oil pump lubrication.
• Suction gas cooled drive motor.
3.1 Shortdescription
Fig. 2
Dimension and connection values can be found in Chapter 11
Fig. 1
Transport eyelet
Valve plate
Oil pump Name plate
Oil sight glass
Cylinder cover
Discharge
shut-off valve
Drive section
Motor section
Terminal box
Suction
shut-off valve

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3|Product description
3.2 Nameplate(example)
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
5 ND(LP):max.admissibleoperating 10 Nominalrotationspeed
pressure (g)Low pressure side 11 Displacement
 HD(HP): max. admissible operating  12 Oiltypelledatthefactory
pressur e(g)High pressure side 13 Terminal box protection type
Observethelimitsofapplication Electricalaccessoriescanchange
diagrams! theIPprotectionclass!
50 Hz
}
60 Hz
}
/
HG 21 P 110- 4 SX
3.3 Typekey(example)
¹)HG - HermeticGas-cooled(suctiongas-cooled)forthenormal-/airconditioningapplications
²)X - Esteroilcharge(HFCrefrigerant,e.g.R134a,R404A/R507,R407C)
³) Additional declaration for Pluscom compressors
4)S - More powerful motor, e.g. for air-conditioning applications
Motor variant 4)
Number of poles
Swept volume
³)
Numbers of cylinders
Size
Oil charge ²)
Series ¹)
Typschild (Beispiel)
1
2
3
4
513
12
7
11
6
10
8
9
1 Typbezeichnung
2 Maschinennummer
3 maximaler Betriebsstrom
4 Anlaufstrom (Rotor blockiert)
5 ND (LP): max. zulässiger Stillstandsdruck
Saugseite
HD (HP): max. zulässiger Betriebsdruck
Hochdruckseite
Einsatzgrenzendiagramme beachten!
50 Hz
60 Hz
6 Spannung, Schaltung, Frequenz
7 Nenndrehzahl
8 Hubvolumen
9 Spannung, Schaltung, Frequenz
10 Nenndrehzahl
11 Hubvolumen
12 Werkseitig eingefüllte Ölsorte
13 Schutzart Klemmenkasten
10,6/6,1A
45A 26A
9,4
11,3
HGX12P/110-4S
AS35830A001
AS35830A001
1
2
3
4
5
6
7
8
9
10
12
13
11
Fig. 3
Bock GmbH, Benzstr. 7
72636 Frickenhausen, Germany
BOCK
BOCK lub E55

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3|Product description
/
/
HG
HG
2
2
1
1
P
P
110-
110
HC
LG
4
S
S
3
X
3.4 Typekey HCcompressor (example)
3.5 Typkey LGcompressor (example)
¹)HG - Hermetic Gas-Cooled (suction gas-cooled)
²) Additional declaration for Pluscom compressors
³)S - More powerful motor
¹)HG - Hermetic Gas-Cooled (suction gas-cooled)
²)X
- Ester oil charge
³) Additional declaration for Pluscom compressors
4)S - More powerful motor, e.g. for air-conditioning applications
ML - Motor for normal cooling and deep freezing
Hydrocarbons
Motor variant ³)
Number of poles
Swept volume
²)
Numbers of cylinders
Size
Series ¹)
HFO refrigerant
Engine performance in hp
Motor variant 4)
Swept volume
³)
Numbers of cylinders
Size
Oil charge ²)
Series ¹)

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4|Areas of application
4.1 Refrigerants
• HFKW/HFC:  R134a, R404A/R507, R407C
• (H)FCKW/(H)CFC: R22
4.2 Oilcharge
4.3 Limitsofapplication
INFO Forrefilling,werecommendtheaboveoiltypes.
Alternatives:seechapter 9.4
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! Fig. 4
max.
min.
0,5 Ltr.
oil level ~
~
ATTENTION Compressoroperationispossiblewithintheoperatinglimits.
ThesecanbefoundinBockcompressorselectiontool(VAP)
undervap.bock.de.Observetheinformationgiventhere.
-Permissibleambienttemperature(-20°C)-(+60°C).
-Max.permissibledischargeendtemperature140°C.
-Max.permissibleswitchingfrequency8x/h.
-Aminimumrunningtimeof3min.steady-statecondition
(continuousoperation)mustbeachieved.
Foroperationwithsupplementarycooling:
-Useonlyoilswithhighthermalstability.
-Avoidcontinuousoperationnearthethreshold.
Foroperationwithfrequencyconverter:
- The maximum current and power consumption must not be
exceeded.Inthecaseofoperationabovethemainsfrequency,the
applicationlimitcanthereforebelimited.
When operating in the vacuum range, there is a danger of air
enteringonthe suction side.Thiscan cause chemical reactions,
apressureriseinthecondenserandanelevatedcompressed-gas
temperature.Preventtheingressofairatallcosts!
Max.permissibleoperating
pressure(LP/HP)1):19/28bar
1) LP = low pressure HP = high pressure
 Thecompressorsarelledatthefactorywiththefollowingoiltype:
- for R404A/R507 BOCK lub E55
- for R22 BOCK lub A46
Compressors with ester oil charge (BOCK lub E55)aremarkedwithanXinthetype
designation (e.g. HGX12P/110-4).

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5 |Areas of application at HC and LG compressors
5.3 Operatinglimits
ATTENTION Compressor operation is possible within the operating limits.
ThesecanbefoundinBockcompressorselectiontool (VAP)under
vap.bock.de. Observe the information given there and the follo-
wingnotes:
-Minimumsuperheating∆tOh=20K(onlyatHCcompressors)
Inordertoguaranteetherequiredminimumsuperheatingof∆tOh
=20K,aninternalheatexchangerIHXmayhavetobeinstalled.
(onlyatHCcompressors)
- Min.pressuregastemperature≥50°C(min.20Kovercondens-
ingtemperature). Suctiongassuperheatingoncompressorent-
ranceshouldbemin.7-10K,mustbeincreasedifnecessary
(onlyatLGcompressors)
-Min.oiltemperature≥ 30°C.
-Operationinthevacuumrangeisnotpermitted.
During operation in the vacuum range, there is a danger of air
entering on the suction side. This can cause chemical reactions,
pressureriseinthecondenserandanexcessivepressuregastem-
peratureaswellasshiftingoftherefrigerantignitionlimitintothe
criticalrange.Avoidabsolutelyanyentryofair!
Usealowpressureswitch!Selectashut-offpointmin.50Pahigher
thantheprevailingsurroundingpressure!
5.1 Refrigerants
• Hydrocarbons:  R290,R1270(Recommendationquality2.5(<50ppmH2O))
• HFOrefrigerants:  R1234ze,R1234yf,R455A,R454C
5.2Oilcharge
The compressors are factory-charged with the following oil type:
• HCcompressors:  BOCK lub G68
• LGcompressors:  BOCK lub E55
BOCK lub E85 (from tO>15°C,mustbespecifiedintheorder)
Maximumpermissibleoperating
pressure(LP/HP)1):19/28bar
1) LP = Low pressure HP = High pressure

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6|Compressor assembly
?
6.1 Storageandtransport
Use transport eyelet.
Do not lift manually!
Use lifting gear!
 Storageat(-30°C)-(+70°C),maximumpermissiblerelativehumidi-
ty 10 % - 95 %, no condensation
Do not store in a corrosive, dusty, vaporous atmosphere or in a com-
bustible environment.
6.2 Settingup
 Setuponanevensurfaceorframewithsufcientload-
bearing capacity.
Single compressor preferably on vibration damper.
Duplex and parallel circuits always rigid.
 Provideadequateclearanceformaintenancework.
 Ensureadequatecompressorventilation.
Do not use in a corrosive, dusty, damp atmosphere or a
combustible environment.
F
E
D
C
B
A
1 2
3
4
F
E
D
C
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
6.3 Pipeconnections
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.
ATTENTION Attachments(e.g.pipeholders,additionalunits,fasteningparts,
etc.)directlytothecompressorarenotpermissible!
ATTENTION Damagepossible.
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).
Sunprotection:Ifthecompressorissetupoutdoors,ithas
to be protected from direct sunlight.

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6|Compressor assembly
6.4 Pipes
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.
Rigid
fixedpoint
Asshortas
possible
The pipe connections have graduated inside diameters so that pipes with
standart millimetre and inch dimensions can be used.
The connection diameters of the shut-off valves are rated for maximum
compressor output. Theactualrequiredpipecrosssectionmustbe
matchedtotheoutput.Thesameappliesfornon-returnvalves.
Fig.5:graduated
internal diameter
6.5 Layingsuctionandpressurelines
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,theresult
beingalossofrefrigerant.
INFO Proper layout of the suction and discharge lines directly after
the compressor is integral to the system’s smooth running and
vibrationbehaviour.
Fig. 6
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).
Moisture in the refrigeration circuit can lead to crystal and hydrate formation. For this reason, we
recommendusingalterdrierandasightglasswithamoistureindicator.
6.6Suctionpipelterandlterdrier

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6|Compressor assembly
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. 7 Fig. 8
6.7 Operatingtheshut-offvalves
Valvespindleseal
Release
Tighten
Pipe connection
Pipe connection
6.8 Operatingmodeofthelockableserviceconnections
Fig. 9
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. 10
Openingtheserviceconnection
Spindle:Turn1/2- 1 turn to the right clockwise.
—> Service connection opened / shut-off valve opened.
Service connec-
tion closed
Connection
blocked
Spindle
Service connec-
tion opened
Spindle Connection
open
Compressor
Compressor
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.

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7|Electrical connection
7.1 Informationforcontactorandmotorcontactorselection
Allprotectiondevicesandswitchingormonitoringunitsmustbettedinaccordancewiththelocal
safetyregulationsandestablishedspecications(e.g.VDE)aswellaswiththemanufacturer’sinfor-
mation. Motor protection switches are required! Motor contactors, feed lines, fuses and motor
protection switches must be rated on the basis of the maximum working current (see name plate).
For motor protection use a current-dependent and time-delayed overload protection device for moni-
toring all three phases. Set the overload protection device so that it must be actuated within 2 hours,
if there is 1.2 times the max. working current.
7.2 Connectionofthedrivingmotor
The compressor is designed with a motor for star-delta circuits.
Designation on the name plate
∆/Y
Star-deltastart-upisonlypossibleon230Vvoltagesupply.Example:
INFO Connect the compressor motor in accordance with the circuit diagram
(seeinsideofterminalbox).
Use suitable cable entry point of the correct protection type (see
nameplate)forroutingcablesintotheterminalbox.Insertthestrain
reliefs and prevent chafe marks on the cables.
Comparethevoltageandfrequencyvalueswiththedataforthe
mains power supply.
Onlyconnectthemotorifthesevaluesarethesame.
DANGER Riskofelectricshock!Highvoltage!
Onlycarryoutworkwhentheelectricalsystemisdisconnected
fromthepowersupply!
INFO Theconnectionexamplesshownrefertothestandardversion.In
thecaseofspecialvoltages,theinstructionsafxedtotheterminal
boxapply.
ATTENTION Whenattachingaccessorieswithanelectrical cable,a minimum
bendingradiusof3xthecablediametermustbemaintainedfor
layingthecable.
230V∆
Direct start Star-deltastart
400VY
Directstartonly
Elektrischer Anschluss Electrical connection Raccordement électrique ∆/ Y
96027-11.06-DGbF
∆
Niedere Spannung
Low voltage
Bas voltage
Y
Hohe Spannung
High voltage
Haut voltage
L3
L1 L2
L3
L1 L2
Elektrischer Anschluss Electrical connection Raccordement électrique ∆/ Y
96027-11.06-DGbF
∆
Niedere Spannung
Low voltage
Bas voltage
Y
Hohe Spannung
High voltage
Haut voltage
L3
L1 L2
L3
L1 L2
L1 L2 L3
L1 L2 L3

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BT1 Coldconductor(PTCsensor)motorwinding
BT2 Thermalprotectionthermostat(PTCsensor)
FC1 Load circuit safety switches
FC2 Control power circuit fuse
BP1 High pressure safety monitor
BP2 Safety chain (high/low pressure monitoring)
BT3 Release switch (thermostat)
7.3 Circuitdiagrammfordirectstart230V∆/400VY
Fig. 11
Anschlußkasten Verdichter
BT1
INT69G
QA1
L1 L2 L3 N PE PE
FC1.1
FC2
SF1
BP1
P>
QA2
BP2
P
QA2
L1.1
L2.1
L3.1
L1.2
N
PE
BT3
1112 14
L N B1 B2
12
11
10
9
8
7
6
5
4
3
2
1
BT2
Θ
BT2
Θ
FC1.1
I> I> I>
1
2
QA2
3
4
5
6
-EC1 3~
M
Θ
EB1
Compressor terminal box

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Anschlußkasten Verdichter
BT1
INT69G
QA1
L1 L2 L3 N PE PE
FC1.1
FC2
SF1
BP1
P>
QA2
BP2
P
QA2
L1.1
L2.1
L3.1
L1.2
N
PE
BT3
1112 14
L N B1 B2
12
11
10
9
8
7
6
5
4
3
2
1
BT2
Θ
BT2
Θ
FC1.1
I> I> I>
1
2
QA2
3
4
5
6
-EC1 3~
M
Θ
EB1
QA1 Main switch
SF1 Control voltage switch
EC1 Compressor motor
QA2 Compressor contactor
INT69 G Electronic trigger unit INT69 G
EB1 Oil sump heater
DANGER Explosionrisk!
ElectronictriggerINT69 GatHC and LG compressorshas to be
installedoutsideanydangerarea!
Seealsochapter7.7.

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7.4 ElectronictriggerunitINT69G
7.5 ConnectionofthetriggerunitINT69G
The compressor motor is tted with cold conductor temperature sensors (PTC) connected to the
electronic trigger unit INT69 G in the terminal box. In case of excess temperature in the motor
winding, the INT69 G deactivates the motor contactor. Once cooled, it can be restarted only if the
electroniclockoftheoutputrelay(terminalsB1+B2)isreleasedbyinterruptingthesupplyvoltage.
The hot gas side of the compressor can also be protected against overtemperature using thermal
protectionthermostats(accessory).
Theunittripswhenanoverloadorinadmissibleoperatingconditionsoccur.Findandremedy
thecause.
INFO Therelayswitchingoutputisexecutedas a oating changeover
contact.Thiselectricalcircuitoperatesaccordingtothequiescent
currentprinciple,i.e.the relaydropsintoa the idle position and
deactivatesthemotorcontactorevenincaseofasensorbreakor
open circuit.
INFO ConnectthetriggerunitINT69Ginaccordancewiththecircuitdia-
gram.Protectthetriggerunitwithadelayed-actionfuse(FC2)of
max.4A.Inordertoguaranteetheprotectionfunction,installthe
triggerunitastherstelementinthecontrolpowercircuit.
Οnderung
Klebeschilder
0
Datum Name
Datum
Bearb.
Gepr.
Norm
1
04.12.2009
Kelich
22.05.2015
Urspr.
2
Ers. f.
3
Ers. d.
4
Schaltplan
567
BOCK COMPRESSORS
8
=
+
9
Bl.
MP10 INt69 Bl.
MP10 INt69
INT69 G
Motor Protection MP10
Steuerstrom-
kreis
L
N
Steuerstrom-
kreis
L N
1112 14
B1 B2OG OG
+
-
BT1
Θ
X1 L1 L1 N N 43 43 11 12 14
L S M
X2123456
R1 R2
+
-
BT1
Θ
+
-
BT2
Θ
+
-
BT2
Θ
L
N
Terminal box
Fig. 12
ATTENTION
Measure circuit BT1 andBT2
(PTC sensor)mustnot come
into contact with external
voltage.
Thiswoulddestroythetrigger
unitINT69GandPTCsensors.
Control circuit
7| Electrical connection

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Relay position INT69 G
B2 12 14 11
Fig. 13
7.6FunctiontestofthetriggerunitINT69G
Before commissioning, after troubleshooting or making changes to the control power circuit, check
the functionality of the trigger unit. Perform this check using a continuity tester or gauge.
Gaugestate Relayposition
1. Deactivated state 11-12
2. INT69 G switch-on 11-14
3. Remove PTC connector 11-12
4. Insert PTC connector 11-12
5. Reset after mains on 11-14
7| Electrical connection
7.7 ElectronictriggerunitINT69GatHCandLGcompressors
The supplied INT69 G must be connected according to the wiring diagram shown here in a separate
control cabinet, which must be installed outside each danger zone.
BT1 Cold conductor (PTC
sensor)motorwinding
BT2 Heat protection thermo-
stat(PTCsensor)
EB1 Oil sump heater
ATTENTION Installheatprotectionthermostatsandcoldconductormotor
windinginseries!
Fig. 14
Οnderung
0
Datum Name
Datum
Bearb.
Gepr.
Norm
1
04.12.2009
Kelich
08.05.2020
Urspr.
2
Ers. f.
3
Ers. d.
4
HG12
567
BOCK COMPRESSORS
8
=
+
9
Bl.
5Bl.
2
1
Schaltschrank
EB1 BT2
BT1
1 2 3 4 5 6 7 8 09 10 11 12
INT69G
Οnderung
0
Datum Name
Datum
Bearb.
Gepr.
Norm
1
04.12.2009
Kelich
08.05.2020
Urspr.
2
Ers. f.
3
Ers. d.
4
HG12
567
BOCK COMPRESSORS
8
=
+
9
Bl.
5Bl.
2
1
Schaltschrank
EB1 BT2
BT1
1 2 3 4 5 6 7 8 09 10 11 12
INT69G
Switch cabinet

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7 |Electrical connection
7.8OilsumpheateratHCandLGcompressors
As the solubility of hydrocarbons and HFO refrigerants in oil can be very high, especially at high
suction pressures, the compressor must be equipped with an oil sump heater. For this reason, a
pump-down circuit is recommended during standstill to reduce the suction-side standstill pressures.
ATTENTION Theoilsumpheatermustgenerallybeconnectedandoperated!
•InaTT-orTNsystem,aresidualcurrentprotectiondevice(RCD)
mustbeused.
•InanITsystem,aninsulationmonitoringdevicemustbeused.
Nationalstandardsandregulationsmustbeobserved.