GEA HGX12P CO2 User manual

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engineering for a better world
GEA Compressor HGX12P CO2
Assembly instructions
HGX12P/30-4 CO2
HGX12P/40-4 CO2
HGX12P/50-4 CO2
HGX12P/75-4 CO2

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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.
GEA Bock GmbH
72636 Frickenhausen
GEA Bock GmbH
Benzstraße 7
72636 Frickenhausen
Germany
Telephone [phone]
Fax [phone]
[email protected]
www.gea.com
Manufacturer
Contact
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 Product description 6
2.1 Short description
2.2 Name plate
2.3 Type key
Contents Page

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Contents Page
3 Areas of application 8
3.1 Refrigerants
3.2 Oil charge
3.3 Limits of application
4 Compressor assembly 9
4.1 Storage and transport
4.2 Setting up
4.3 Pipe connections
4.4 Pipes
4.5 Laying suction and pressure lines
4.6 Operating the shut-off valves
4.7 Operating mode of the lockable service connections
5 Electrical connection 12
5.1 Information for contactor and motor contactor selection
5.2 Connection of the driving motor
5.3 Circuit diagram for direct start 230 V Δ/ 400 V Y --> with MP10
5.4 Electronic trigger unit MP10
5.5 Connection of the electronic trigger unit MP10
5.6 Functional test of the electronic trigger unit MP10
5.7 Circuit diagram for direct start 230 V Δ/ 400 V Y --> with INT69 G
5.8 Electronic trigger unit INT69 G
5.9 Connection of the electronic trigger unit INT69 G
5.10 Functional test of the electronic trigger unit INT69 G
5.11 Oil sump heater (accessories)
6 Commissioning 22
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 Decompression valves
6.8 Avoiding slugging
6.9 Connection of oil level regulator
7 Maintenance 26
7.1 Preparation
7.2 Work to be carried out
7.3 Spare parts recommendation
7.4 Accessories
7.5 Lubricants
7.6 Decommissioning
8 Technical data 28
9 Dimensions and connections 29
10 Declaration of installation 30
11 Service 31

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WARNING! DANGER OF SUFFOCATION!
 NeverreleasesignicantvolumesofCO2or the entire contents of
the system into closed rooms!
1|Safety
1.2 Qualicationsrequiredofpersonnel
1.3 General safety instructions
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thequalica-
tions listed below:
• For example, a refrigeration technician, refrigeration mechatron-
ics engineer. As well as professions with comparable training, which
enable personnel to assemble, install, maintain and repair refrigeration
and air-conditioning systems. Personnel must be capable of assessing
thework to be carried out and recognising any potential dangers.
WARNING! • Refrigerating compressors are pressurised machines and
therefore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.
1.1 Identicationofsafetyinstructions:
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.

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1|Safety
These assembly instructions describe the standard version of the HGX12P -CO2manufactured by GEA.
The compressor is intended for use with CO2in sub-critical 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!
1.4 Intended use
WARNING! The compressor may not be used in potentially explosive
environments!
The GEA refrigerating compressor named in the title is intended for installing in a machine (within
theEUaccordingtotheEUDirectives2006/42/ECMachineryDirective,97/23/ECPressureEquipment
Directive and 2006/95/EC – Low Voltage Directive).
Commissioning is only permissible if the compressor has been installed in accordance with these
assembly instructions and the entire system into which it is integrated has been inspected and
approved in accordance with legal regulations.

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Name plate
Fig. 1
Fig. 2
Oil sight glass
Valve plate
Cylinder cover
Discharge
shut-off valve
Oil pump
Terminal box
Suction
shut-off valve
Drive section
Motor section
Dimension and connection values can be found in Chapter 9
Transport eyelet
2|Product description
• Semi-hermetic two-cylinder reciprocating compressor with oil pump lubrication.
• Suction gas cooled drive motor.
2.1 Short description

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2|Product description
/
HG 21 P 75- 4CO2 X
2.2 Name plate (example)
2.3 Typekey (example)
¹) HG - Hermetic Gas-Cooled (suction gas-cooled)
²) X - Ester oil charge
³) Additional declaration for Pluscom compressors
CO2Version
Number of poles
Swept volume
³)
Numbers of cylinders
Size
Oil charge ²)
Series ¹)
Fig. 3
1
2
3
4
5
7
6
10
8
9
13
12
11
C85E
40/55
AS33567A001
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. permissible operating 10 Nominal rotation speed
pressure (g) Low pressure side 11 Displacement
HD (HP): max. permissible 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
}
GEA Bock GmbH
72636 Frickenhausen, Germany

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3|Areas of application
 Thecompressorsarelledatthefactorywiththefollowingoiltype:
GEA C 85 E (only this oil may be used)
3.1 Refrigerants
• CO2: R744
3.2 Oil charge
Evaporation temperature (°C)
Condensing temperature (°C)
Suction gas superheat (K)
Suction gas temperature (°C)
R744
1
Fig. 5 Max. permissible operating
pressure (LP/HP)1): 40/55 bar
1) LP = Low pressure
HP = High pressure
Unlimited
application range
1HGX12P/75-4 CO2
Maximum condensing
temperature tc= 0°C
ATTENTION! Compressor operation is possible within the operating limits
shown in the diagrams. Please note the signicance
of the shaded areas. Thresholds should not be selected as design
or continuous operation points.
- 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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.
3.3 Limits of application
The oil level must be in the
visible part of the sight
glass; damage to the com-
pressor is possible if over-
filled or underfilled!
ATTENTION!max.
min.
0,5 Ltr.
oil level
Fig. 4
~
~

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4|Compressor assembly
4.3 Pipe connections
INFO! Newcompressorsarefactory-lledwithinertgas(3barnitrogen).
Leave this service 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! 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).
?
4.1 Storage and transport
Use transport eyelet.
Do not lift manually!
Use lifting gear!
Storage at (-30°C) - (+70°C), maximum permissible relative humidity
10% - 95%, no condensation
Do not store in a corrosive, dusty, vaporous atmosphere or in a com-
bustible environment.
Fig. 7
Fig. 6
ATTENTION! Attachments(e.g.pipeholders,additionalunits,fasteningparts,
etc.) directly to the compressor are not permissible!
4.2 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.
Fig. 8
Fig. 9
Fig. 10
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1 2
3
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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

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Fig. 12
Rigid
fixed point
As short as
possible
4.5 Laying suction and pressure lines
INFO! Proper layout of the suction and pressure lines directly after the
compressor is integral to the smooth running and vibration behaviour
of the system.
ATTENTION! Improperlyinstalledpipes can cause cracks andtearswhich can
result in a loss of refrigerant.
A rule of thumb:
Alwayslaytherstpipesectionstartingfromtheshut-offvalvedownwards and
parallel to the drive shaft.
4|Compressor assembly
4.4 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.
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. 11: graduated
internal diameter

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Valve spindle seal
Release
Tighten
Fig. 13 Fig. 14
4|Compressor assembly
Before opening or closing the shut-off valve, release the valve spindle seal by approx. ¼ of a turn
counter-clockwise.
After activating the shut-off valve, re-tighten the adjustable valve spindle seal clockwise.
4.6 Operating the shut-off valves
Pipe connection
Pipe connection
4.7 Operatingmodeofthelockableserviceconnections
Fig. 15
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. 16
Opening the service connection
Spindle: Turn ½ - 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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5|Electrical connection
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.
5.1 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.
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.
5 Electrical connection
  DANGER! Riskofelectricshock!Highvoltage!
Onlycarryoutworkwhentheelectricalsystemisdisconnected
from the power supply!

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5|Electrical connection
5.2 Connection of the driving motor
The compressor is designed with a motor for star-delta circuits.
Designation on the name plate Sticker on the terminal box
∆/ Y
Star-delta start-up is only possible on 230 V voltage supply. Example:
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
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.

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5.3 Circuit diagramm for direct start 230 V ∆/ 400 V Y --> compressor with MP10
BT1 Cold conductor (PTC sensor) motor winding
BT2 Thermal protection thermostat (PTC sensor)
FC1 Load circuit safety switches
FC2 Control power circuit fuse
BP1 Safety chain (high/low pressure monitoring)
BP2 Release switch (thermostat/pressostat)
01234
56789
Urspr.
Ers.f.
Ers.d.
Anlagenbezeichnung
Οnderung
Vorblatt:
Datum
1
Name
Bearb.
Gepr.
Norm
HG34P
R410A/Co2
200308
Kommission:
Gesamtblatt:
Datum
27.05.2015
27.05.2015
11
Kelich
Name
Zeichnungsnummer:
Kundennummer:
Kunde:
Anlage
Bl. Gruppe:
=
2INT69_24V
Ort
Bl.
Fbl.
+
1 (ohne HA)
2HG34 FU+Box
27.05.2015ESSG_A1_35_01D
Klemmenkasten Verdichter
MP10
A1 Alarm Motorschutz
A2 Übertemperatur BT1, BT2
A3 Alarm Hochdruck
BT1
QA1
FC1
I> I> I>
QA2
PE
FC1
A1
X1 L1 L1 N N 43 43 11 12 14
L S M
X2123456
FC2
SF1
BT2
A2
BP1
P
PE
A3
BP2
P<
PE
QA2
12
EB1
QA2
3 4
L1.1
L2.1
L3.1
L1.2
N
PE
-EC1 3~
M
Θ
L1 L2 L3 N PE
Compressor terminal box
Fig. 17

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QA1 Main switch
SF1 Control voltage switch
EC1 Compressor motor
QA2 Compressor contactor
MP10 Electronic trigger unit MP10
EB1 Oil sump heater
01234
56789
Urspr.
Ers.f.
Ers.d.
Anlagenbezeichnung
Οnderung
Vorblatt:
Datum
1
Name
Bearb.
Gepr.
Norm
HG34P
R410A/Co2
200308
Kommission:
Gesamtblatt:
Datum
27.05.2015
27.05.2015
11
Kelich
Name
Zeichnungsnummer:
Kundennummer:
Kunde:
Anlage
Bl. Gruppe:
=
2INT69_24V
Ort
Bl.
Fbl.
+
1 (ohne HA)
2HG34 FU+Box
27.05.2015ESSG_A1_35_01D
Klemmenkasten Verdichter
MP10
A1 Alarm Motorschutz
A2 Übertemperatur BT1, BT2
A3 Alarm Hochdruck
BT1
QA1
FC1
I> I> I>
QA2
PE
FC1
A1
X1 L1 L1 N N 43 43 11 12 14
L S M
X2123456
FC2
SF1
BT2
A2
BP1
P
PE
A3
BP2
P<
PE
QA2
1 2
EB1
QA2
3 4
L1.1
L2.1
L3.1
L1.2
N
PE
-EC1 3~
M
Θ
L1 L2 L3 N PE
A1 Alarm motor protection
A2 Overheating BT1, BT2
A3 Alarm high pressure

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5|Electrical connection
PTC1 PTC2
Terminal box
Fig. 18
Temperature monitoring connections:
Motor winding: Terminals 1 - 2
Thermal protection thermostat: Terminals 3 - 4
Restart prevention: Terminals 5 - 6
ATTENTION!
Terminals 1 - 6 on the trigger
unit MP 10 and terminals PTC
1 and PTC 2 on the compres-
sor terminal board must not
come into contact with mains
voltage. This would destroy the
trigger unit and PTC sensors.
The supply voltage at L1-N
(+/- for DC 24 V version) must
be identical to the voltage at
terminals11,12,14and43.
5.4 Electronic trigger unit MP 10
The compressor motor is tted with cold conductor temperature sensors (PTC) connected to the
electronic trigger unit MP 10 in the terminal box. Readiness to operate is signalled by the H3 LED
(green) after the power supply is applied. In the case of excess temperature in the motor winding, the
unit switches off the compressor and the H1 LED lights red.
The hot gas side of the compressor can also be protected against overtemperature using a thermal
protection thermostat (accessory). The H2 LED (red) is provided for the protection function.
The unit trips when an overload or inadmissible operating conditions occur. Find and remedy
the cause.
5.5 Connection of the trigger unit MP 10
INFO! Connect the trigger unit MP10 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.
INFO! Theunithasarestartpreventiondevice.Afteryouhaverectiedthe
fault,interruptthemainsvoltage.Thisunlockstherestartprevention
device and the LEDs H1 and H2 go out.

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5|Electrical connection
The compressor and the trigger unit MP10 are operational when the H3 LED (green) lights.
5.6 Function test of the trigger unit MP 10
Pos Procedure LED H1 LED H2 LED H3
red red green
1•Interrupt power supply (L1 or SF1) OFF OFF OFF
•Release the motor temperature sensor connection (1 or 2)
•Release the hot gas temperature sensor (if installed) (3 or 4)
2•Restore the power supply (L1 or SF1) ON
•Function check of motor temperature sensor: operational ON
•Function check of hot gas temperature sensor: operational ON
3•Interrupt power supply again (L1 or SF1) OFF OFF OFF
•Reconnect terminals 1 or 2 and/or 3 or 4
4•Restore the power supply (L1 or SF1): OFF OFF ON
•MP 10 is operational again
Before start-up, troubleshooting or making changes to the control power circuit, check the functionality
of the trigger unit:

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01234
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Urspr.
Ers.f.
Ers.d.
Anlagenbezeichnung
Οnderung
Vorblatt:
Datum
2INT69
Name
Bearb.
Gepr.
Norm
HG34P
R410A/Co2
200308
Kommission:
Gesamtblatt:
Datum
27.05.2015
27.05.2015
11
Kelich
Name
Zeichnungsnummer:
Kundennummer:
Kunde:
Anlage
Bl. Gruppe:
=
2INT69_24V
Ort
Bl.
Fbl.
+
2INT69 (Ohne HA)
2INT69HR60
27.05.2015ESSG_A1_35_01D
Klemmenkasten Verdichter
A1 Alarm Motorschutz
A2 Übertemperatur BT1, BT2
A3 Alarm Hochdruck
INT69 G
BT1
QA1
FC1
I> I> I>
QA2
PE
FC1
A1
FC2
SF1
A2
BP1
P
PE
A3
BP2
P<
PE
QA2
12
EB1
QA2
3 4
L1
L2
L3
L1.1
N
PE
1112 14
L N B1 B2
-EC1 3~
M
Θ
BT2
L1 L2 L3 N PE
5.7 Circuit diagramm for direct start 230 V ∆/ 400 V Y --> compressor with INT69 G
Fig. 19
BT1 Cold conductor (PTC sensor) motor winding
BT2 Thermal protection thermostat (PTC sensor)
FC1 Load circuit safety switches
FC2 Control power circuit fuse
BP1 Safety chain (high/low pressure monitoring)
BP2 Release switch (thermostat/pressostat)
Compressor terminal box

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09917-11.2015-DGbFEI
01234
56789
Urspr.
Ers.f.
Ers.d.
Anlagenbezeichnung
Οnderung
Vorblatt:
Datum
2INT69
Name
Bearb.
Gepr.
Norm
HG34P
R410A/Co2
200308
Kommission:
Gesamtblatt:
Datum
27.05.2015
27.05.2015
11
Kelich
Name
Zeichnungsnummer:
Kundennummer:
Kunde:
Anlage
Bl. Gruppe:
=
2INT69_24V
Ort
Bl.
Fbl.
+
2INT69 (Ohne HA)
2INT69HR60
27.05.2015ESSG_A1_35_01D
Klemmenkasten Verdichter
A1 Alarm Motorschutz
A2 Übertemperatur BT1, BT2
A3 Alarm Hochdruck
INT69 G
BT1
QA1
FC1
I> I> I>
QA2
PE
FC1
A1
FC2
SF1
A2
BP1
P
PE
A3
BP2
P<
PE
QA2
1 2
EB1
QA2
3 4
L1
L2
L3
L1.1
N
PE
1112 14
L N B1 B2
-EC1 3~
M
Θ
BT2
L1 L2 L3 N PE
QA1 Main switch
SF1 Control voltage switch
EC1 Compressor motor
QA2 Compressor contactor
INT69 G Electronic trigger unit INT69 G
EB1 Oil sump heater
A1 Alarm motor protection
A2 Overheating BT1, BT2
A3 Alarm high pressure

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5.8 Electronic trigger unit INT69 G
5.9 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
5|Electrical connection
Terminal box
Fig. 20
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