BOCK HG6 User manual

BOCK HG6
Assembly instructions
09971-01.2021-Gb
Translation of the original instructions
colour the world
of tomorrow
BOCK®
HG6/1080-4 HG6/1080-4S
HG6/1240-4 HG6/1240-4S
HG6/1410-4 HG6/1410-4S
HGX6/1080-4 HGX6/1080-4S
HGX6/1240-4 HGX6/1240-4S
HGX6/1410-4 HGX6/1410-4S
BockGmbH, Benzstr.7
72636Frickenhausen, Germany
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

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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 Product description 6
2.1 Short description
2.2 Name plate
2.3 Type key
3 Areas of application 8
3.1 Refrigerants
3.2 Oil charge
3.3 Limits of application
4Compressor assembly 10
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 13
5.1 Information for contactor and motor contactor selection
5.2 Standard motor, design for direct or partial winding start
5.3 Basic circuit diagram for part winding start with standard motor
5.4 Special motor: design for direct or star-delta start
5.5 Basic circuit diagram for star-delta start with special motor
5.6 Electronic trigger unit MP10
5.7 Connecting the trigger unit MP10
5.8 Functional test of the trigger unit MP10
5.9 Oil sump heater (accessories)
6 Commissioning 23
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 slugging
6.8 Connection of oil level regulator
7 Maintenance 25
7.1 Preparation
7.2 Work to be carried out
7.3 Spare parts recommendation/accessories
7.4 Extract from the lubricants table
7.5 Decommissioning
8 Technical data 27
9 Dimensions and connections 28
10 Declaration of installation 30
11 Service 31

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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, 2014/68/EU Pressure
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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Fig. 1
Valve plate
Terminal box
Dimension and connection values can be found in Chapter 9
Discharge
shut-off valve
Suction
shut-off valve
Drive section
Motor
section
Fig. 2
2|Product description
• Semi-hermetic four-cylinder reciprocating compressor with suction-gas cooled drive motor.
• Flange-mounted drive motor on the compressor case.
• Preferred application range: normal refrigerating and air-conditioning.
2.1 Short description
Transport eyelet
Oil pump
Cylinder cover
Name plate
Oil sight glass
BockGmbH, Benzstr.7
72636Frickenhausen, Germany
BOCK

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2|Product description
Fig. 3
2.2 Name plate (example)
2.3 Type key (example)
¹) HG - Hermetic Gas-cooled (suction gas-cooled)
²) X - Ester oil charge (HFC refrigerant, e.g. R134a, R404A/R507, R407C)
3) S - More powerful motor, e.g. for air-conditioning applications
Motor variant 3)
Number of poles
Swept volume
Size
Oil charge ²)
Series ¹)
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 pressur e 12 Oiltypelledatthefactory
(g) Low pressure side 13 Terminal box protection type
HD (HP): max. admissible operating Electrical accessories can change
pressur e(g) High pressure side the IP protection class!
Observe the limits of application
diagrams!
50 Hz
}
60 Hz
}
/
HG 61410-4 XS
Bock GmbH, Benzstr. 7
72636 Frickenhausen, Germany
BOCK

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INFO For refilling, we recommend the above oil types.
Alternatives: see lubricants table, Chapter 7.5
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12x/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 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 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!
3.3 Limits of application
3|Areas of application
 Thecompressorsarelledatthefactorywiththefollowingoiltype:
- for R134a, R404A/R507, R407C FUCHS Reniso Triton SE 55
- for R22 FUCHS Reniso SP 46
Compressors with ester oil charge (FUCHS Reniso Triton SE 55) are marked with an X in the type
designation (e.g. HGX6/1410-4).
3.1 Refrigerants
• HFKW / HFC: R134a, R404A/R507, R407C
• (H)FCKW / (H)CFC: R22
3.2 Oil charge
Fig. 4
max.
min.
2,0 Ltr.
oil level ~
~
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!

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Evaporation temperature (°C)
Condensing temperature (°C)
Suction gas superheat (K)
Suction gas temperature (°C)
3|Areas of application
Design for other
areasonrequest
R134a
R407C
R22
Fig. 5
Fig. 6
Fig. 8
Unlimited application range
Supplementary cooling or
reduced suction gas temperature
Supplementary cooling and
reduced suction gas temperature
Motor version S
(more powerful motor)
R404A/R507
1
2
Fig. 7
HGX6/1410-4 S
max. evaporating temperature
t0 = 2 °C
HGX6/1410-4
max. evaporating temperature
t0 = -7 °C
1
2
Max. permissible operating
pressure (LP/HP)1): 19/28 bar
1) LP = Low pressure
HP = High pressure

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4|Compressor assembly
 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. 11
Fig. 12
Fig. 13
4.3 Pipe connections
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
4.2 Setting up
?
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. 10
Fig. 9
INFO Newcompressorsarefactory-lledwithinertgas.
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 Attachments (e.g. pipe holders, additional units, fastening parts,
etc.) directly to the compressor are not permissible!
ATTENTION Damage possible.
Superheating can damage the valve.
Remove the pipe supports from the valve for soldering.
Only solder using inert gas to inhibit oxidation products (scale).

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4.5 Laying suction and pressure lines
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. 14: graduated
internal diameter
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. 15
As short as
possible
Rigid
fixed point
BockGmbH,Benzstr.7
72636Frickenhausen,Germany
BOCK

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4|Compressor assembly
4.6 Operating the shut-off valves
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.
Pipe connection
Pipe connection
4.7 Operating mode of the lockable service connections
Fig. 18
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.
The connection which cannot be shut off is intended for safety devices.
Fig. 19
Opening the service connection
Spindle: Turn ½ - 1 turn clockwise.
—> Service connection opened / shut-off valve opened.
The connection which cannot be shut off is intended for safety devices.
Service connec-
tion closed
Connection
blocked
Spindle
Connection cannot be
shut off
Connection cannot be
shut off
Service connec-
tion opened
Spindle Connection
open
Compressor
Compressor
Fig. 16 Fig. 17
Valve spindle seal
Release
Tighten
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
5.2 Standard motor, design for direct or partial winding start
Designation on the name plate Sticker on the terminal box
Y/YY
Compressors with this marking are suitable for direct or partial winding start. The motor winding is
subdivided into two parts: Partial winding 1 = 66% and part winding 2 = 33%. This winding division
reduces the start-up current needed for a part winding start to approx. 65% of that for a direct start.
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.
INFO A mechanical unloaded start with bypass solenoid valve is
notrequired.
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!
5 Electrical connection
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.

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5.3 Basic circuit diagram for part winding start with standard motor
R1 Cold conductor (PTC sensor) motor winding
R2 Thermal protection thermostat (PTC sensor)
F1.1 /1.2 2 motor protection switches (66% / 33% of I Atotal)
F2 Control power circuit fuse
F3 High pressure safety monitor
F4 Safety chain (high/low pressure monitoring)
F5 Oil differential pressure monitor
B1 Release switch (thermostat)
nderung
0
Datum Name
Datum
Bearb.
Gepr.
Norm
1
20.Feb.2009
Kelich
09.M„r.2010
Urspr.
2
Ers.f.
3
Ers.d.
4
PWMP10
5 6 7
BOCKCOMPRESSORS
8
=
+
9
Bl.
1
Bl.
1
XSS
Q1
L1 L2 L3 NPE
AnschluákastenVerdichter
I=66%
F1.1
K1
1
2
1
3
4
2
5
6
3
1U1
1V1
1W1
PE
M
Y/YY
M1
R1
2U1
2V1
2W1
I=33%
F1.2
K2
1
2
4
3
4
5
5
6
6
X1 L1 L1 N N 43 43 11 12 14
LSM
X2123456
7
F1.1
F1.2
8
R2
4A
F2
S1
910
MP10
11
F5
K1
12
T2
13
N
P™l
14
L
15
M
16
S
P>
F3
17 18 19
K1
P
F4
20
K1
K1T
K2
21 22
K1T
P<
B1
23 24
K1
25
E1
26
L1.1
L2.1
L3.1
L1.2
N
PE
Compressor terminal box
Fig. 20

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Q1 Main switch
M1 Compressor motor
K1 Mains contactor (part winding 1)
K2 Mains contactor (part winding 2)
K1T Delay relay max. 1s
S1 Control voltage switch
E1 Oil sump heater
nderung
0
Datum Name
Datum
Bearb.
Gepr.
Norm
1
20.Feb.2009
Kelich
09.M„r.2010
Urspr.
2
Ers.f.
3
Ers.d.
4
PWMP10
5 6 7
BOCKCOMPRESSORS
8
=
+
9
Bl.
1
Bl.
1
XSS
Q1
L1 L2 L3 NPE
AnschluákastenVerdichter
I=66%
F1.1
K1
1
2
1
3
4
2
5
6
3
1U1
1V1
1W1
PE
M
Y/YY
M1
R1
2U1
2V1
2W1
I=33%
F1.2
K2
1
2
4
3
4
5
5
6
6
X1 L1 L1 N N 43 43 11 12 14
LSM
X2123456
7
F1.1
F1.2
8
R2
4A
F2
S1
910
MP10
11
F5
K1
12
T2
13
N
P™l
14
L
15
M
16
S
P>
F3
17 18 19
K1
P
F4
20
K1
K1T
K2
21 22
K1T
P<
B1
23 24
K1
25
E1
26
L1.1
L2.1
L3.1
L1.2
N
PE

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5|Electrical connection
400 V
Direktstart YY Teilwicklungsstart Y/YY
1V1 1W11U1
2W12V12U1
L3L2L1 L3L2L1
L3L2L1
1V1 1W11U1
2W12V12U1
Direct start YY
Part winding start Y/YY
The motor is wired for direct start (YY) at the factory. For part winding start Y / YY, the bridges must be
removed and the motor feed line connected according to the circuit diagram:
ATTENTION Failure to do this results in opposed rotary elds and results in
damage to the motor. After the motor starts up via partial winding
1, partial winding 2 must be switched on after a maximum delay
of one second . Failure to comply can adversely affect the service
life of the motor.

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5|Electrical connection
5.4 Special motor: design for direct or star-delta start
Amechanicalunloadedstartwithbypasssolenoidvalve(accessories)isrequiredforthe
star-delta start.
Designation on the name plate Sticker on the terminal box
∆/ Y
Star-delta start-up is only possible for 230 V power supply. Example:
230 V ∆
Direct start Star-delta start
400 V Y
Direct start only
5.4 Sondermotor: Ausführung für Direkt- oder Stern-Dreieck-Anlauf
Für den Stern-Dreieck-Anlauf ist eine mechanische Anlaufentlastung mit Bypass-Magnetventil
(Zubehör) erforderlich.
Bezeichnung auf dem Typschild Aufkleber auf Klemmenkasten
∆/ Y
Stern-Dreieck-Anlauf ist nur im Spannungsbereich ∆(230 V) möglich. Beispiel:
230 V ∆
Direktstart Stern-Dreieck-Start
L3L1
V1 W1
U1
V2
U2
W2
L1 L2 L3
L2
V1 W1
U1
V2
U2
W2
L3L2L1
400 V Y
nur Direktstart
V1 W1U1
V2U2W2
L1 L2 L3
5.4 Sondermotor: Ausführung für Direkt- oder Stern-Dreieck-Anlauf
Für den Stern-Dreieck-Anlauf ist eine mechanische Anlaufentlastung mit Bypass-Magnetventil
(Zubehör) erforderlich.
Bezeichnung auf dem Typschild Aufkleber auf Klemmenkasten
∆/ Y
Stern-Dreieck-Anlauf ist nur im Spannungsbereich ∆(230 V) möglich. Beispiel:
230 V ∆
Direktstart Stern-Dreieck-Start
L3L1
V1 W1
U1
V2
U2
W2
L1 L2 L3
L2
V1 W1
U1
V2
U2
W2
L3L2L1
400 V Y
nur Direktstart
V1 W1U1
V2U2W2
L1 L2 L3
5.4 Sondermotor: Ausführung für Direkt- oder Stern-Dreieck-Anlauf
Für den Stern-Dreieck-Anlauf ist eine mechanische Anlaufentlastung mit Bypass-Magnetventil
(Zubehör) erforderlich.
Bezeichnung auf dem Typschild Aufkleber auf Klemmenkasten
∆/ Y
Stern-Dreieck-Anlauf ist nur im Spannungsbereich ∆(230 V) möglich. Beispiel:
230 V ∆
Direktstart Stern-Dreieck-Start
L3L1
V1 W1
U1
V2
U2
W2
L1 L2 L3
L2
V1 W1
U1
V2
U2
W2
L3L2L1
400 V Y
nur Direktstart
V1 W1U1
V2U2W2
L1 L2 L3

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nderung
0
Datum Name
Datum
Bearb.
Gepr.
Norm
1
20.Feb.2009
Kelich
09.M„r.2010
Urspr.
2
Ers.f.
3
Ers.d.
4
D/S
MP10
5 6 7
BOCKCOMPRESSORS
8
=
+
9
Bl.
1
Bl.
1
XSS
Q1
L1 L2 L3 NPE
F1.1
K1
1
2
F1.2
1
AnschluákastenVerdichter
3
4
2
5
6
3PE
U1
V1
W1
M
3
~
M1
Y
K3
1
2
3
4
R1
5
6
W2
U2
V2
D
K2
1
2
4
3
4
5
5
6
6
X1 L1 L1 N N 43 43 11 12 14
LSM
X2123456
7
F1.1
F1.2
8
R2
4A
F2
S1
910
MP10
11
F5
K1
12
T2
13
N
P™l
14
L
15
M
16
S
K1
K1
K3
P>
F3
K4T
K3
K2
17
K4T
K2
K3
18 19
K4T
P
F4
20
K5T
AL
21 22
K5T
P<
B1
23 24
K1
25
E1
26
L1.1
L2.1
L3.1
L1.2
N
PE
5.5 Basic circuit diagram for star-delta start with special motor
Fig. 21
R1 Cold conductor (PTC sensor) motor winding
R2 Thermal protection thermostat (PTC sensor)
F1.1 /1.2 2 motor protection switches
F2 Control power circuit fuse
F3 High pressure safety monitor
F4 Safety chain (high/low pressure monitoring)
F5 Oil differential pressure monitor
B1 Enabling switch (thermostat)
Q1 Main switch
Compressor terminal box

D
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19
09971-01.2021-DGbFEIRu
nderung
0
Datum Name
Datum
Bearb.
Gepr.
Norm
1
20.Feb.2009
Kelich
09.M„r.2010
Urspr.
2
Ers.f.
3
Ers.d.
4
D/S
MP10
5 6 7
BOCKCOMPRESSORS
8
=
+
9
Bl.
1
Bl.
1
XSS
Q1
L1 L2 L3 NPE
F1.1
K1
1
2
F1.2
1
AnschluákastenVerdichter
3
4
2
5
6
3PE
U1
V1
W1
M
3
~
M1
Y
K3
1
2
3
4
R1
5
6
W2
U2
V2
D
K2
1
2
4
3
4
5
5
6
6
X1 L1 L1 N N 43 43 11 12 14
LSM
X2123456
7
F1.1
F1.2
8
R2
4A
F2
S1
910
MP10
11
F5
K1
12
T2
13
N
P™l
14
L
15
M
16
S
K1
K1
K3
P>
F3
K4T
K3
K2
17
K4T
K2
K3
18 19
K4T
P
F4
20
K5T
AL
21 22
K5T
P<
B1
23 24
K1
25
E1
26
L1.1
L2.1
L3.1
L1.2
N
PE
M1 Compressor motor
K1 Mains contactor
K2 Δ-contactor
K3 Y-contactor
K4T Delay relay S/D changeover
K5T Delay relay, start unloader
S1 Control voltage switch
AL Start unloader
E1 Oil sump heater

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5|Electrical connection
5.6 Electronic trigger unit MP 10
Thecompressormotoristtedwithcoldconductortemperaturesensors(PTC)connectedtotheelec-
tronic trigger unit MP10 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.
5.7 Connection of the trigger unit MP10
Temperature monitoring connections:
Motor winding: Terminals 1 - 2
Thermal protection thermostat: Terminals 3 - 4
Restart prevention: Terminals 5 - 6
Fig. 22
Terminal board
INFO Connect the trigger unit MP10 in accordance with the circuit dia-
gram. Protect the trigger unit with a delayed-action fuse (F) of max.
4 A. In order to guarantee the protection function, install the trigger
unitastherstelementinthecontrolpowercircuit.
ATTENTION
Terminals 1 - 6 on the trigger
unit MP10 and terminals PTC 1
and PTC 2 on the compressor
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.
INFO The unit has a restart prevention device. After you have rectied
the fault, either interrupt the mains voltage. This unlocks the restart
prevention device and the LEDs H1 and H2 go out.