BOCK HGX34P 2 Series User manual

BOCK HGX34P 2 -pole
Assembly instructions
96116-01.2021-Gb
Translation of the original instructions
colour the world
of tomorrow
BOCK®
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HGX34P/255-2 HGX34P/315-2S
HGX34P/255-2A HGX34P/315-2SA HGX34P/380-2
HGX34P/315-2 HGX34P/315-2AK HGX34P/380-2A
HGX34P/315-2A HGX34P/315-2SAK HGX34P/380-2AK

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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 Identification of safety instructions
1.2 Qualifications 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 9
4.1 Storage and transport
4.2 Setting up
4.3 Maximum permissible inclination
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 - suction line valve
4.9 Operating mode of the lockable service connections - discharge line valve
4.10 Suction pipe lter and lter drier
5 Electrical connection 13
5.1 Information for contactor and motor contactor selection
5.2 Connection of the driving motor - star circuit
5.3 Connection of the driving motor - part-winding circuit
5.4 Circuit diagram
5.5 Electronic trigger unit INT69 G
5.6 Connection of the trigger unit INT69 G
5.7 External connection INT69 G
5.8 Function test of the trigger unit INT69 G
6 Commissioning 20
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 Avoid slugging
7 Maintenance 22
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 24
9 Dimensions and connections 26
10 Declaration of installation 28
11 Service 29

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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 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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Terminal box
• Semi-hermetic four-cylinder reciprocating compressor with oil pump lubrication.
• Optional in light weight aluminium design
• Suction gas cooled drive motor
2|Product description
Fig. 1
2.1 Short description
Fig. 2
Oil sight glass
Valve plate
Cylinder cover
Discharge
line valve
Oil pump
Drive section
Dimension and connection values can be found in Chapter 9
Transport eyelet
Name plate
1
2
3
4
5
6
7
8
9
10
11
12
13
Suction
line valve
Motor section

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2|Product description
/
HG 43 P 315-2 S AK 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
4) S - More powerful motor e.g. air-conditioning applications
Version
Aluminium lightweight design
Motor variant 4)
Number of poles
Swept volume
³)
Numbers of cylinders
Size
Oil charge ²)
Series ¹)
1
2
3
4
5
13
12
7
11
6
10
8
9
19/28 SE 55
66,1
79,3
IP66
HGX34P/380-2 A
38,0
Y: 172 A
380-420V Y -3- 50HZ
440-480V Y -3- 60HZ
2900
3480
AS38125A001
Fig. 3
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
}
Bock GmbH, Benzstr. 7
72636 Frickenhausen, Germany
BOCK

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3|Areas of application
The compressors are factory-lled with the following oil type:
- FUCHS Reniso Triton SE 55
Compressors with ester oil charge (FUCHS Reniso Triton SE 55) are marked with an X in the type
designation (e.g. HGX34P/380-2 A).
3.1 Refrigerants
• HFKW / HFC: R134a, R407C
3.2 Oil charge
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8x/h.
- A minimum running time of 3 min. steady-state condition
(continuous operation) must be achieved.
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ci-
ent oil is transported back to the compressor.
Foroperationwithfrequencyconverter:
- Control range of the compressor 15 - 50 Hz (K Design 15 - 60 Hz).
- 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
- Use a heat protection thermostat.
-Oilreturnatlowfrequencymustbesupplied.
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
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.
0,7 Ltr.
oil level
Fig. 4
~
~
Max. permissible operating pressure (LP/HP)1): 19/28 bar 1) LP = Low pressure HP = High pressure

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Amax. 30°,
max. 2 minutes
amax. 15°,
continuous
operation
4|Compressor assembly
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. 7
Fig. 8
Fig. 9
F
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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
4.3 Maximum permissible inclination
A
a
A
aa
A
a
A
Fig. 10
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 Poor lubrication can damage the compressor. Respect the stated
values
ATTENTION Fittings (e.g. pipe holders, additional units, mounting parts etc.) on
the compressor are not permissible!
?
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. 6
Fig. 5

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4|Compressor assembly
4.4 Pipe connections
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
4.5 Pipes
4.6 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.
Rigid
fixed point
As short as
possible
Fig. 12
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).
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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Valve spindle seal
Release
Tighten
4|Compressor assembly
Fig. 13 Fig. 14
4.8 Operating mode of the lockable service connections
Suction line valve
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.
4.7 Operating the shut-off valves
Pipe connection
Pipe connection
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.
The connection which cannot be shut off is intended for safety devices.
Fig. 16
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
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.
Fig. similar Fig. similar

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4.9 Operating mode of the lockable service connections
Discharge line valve
4|Compressor assembly
Pipe connection
Pipe connection
Fig. 17
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. 18
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.
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.
4.10Suctionpipelterandlterdrier

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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.
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.
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.

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5.2 Connection of the driving motor with star circuit
Designation on the name plate
Y
Star-delta start-up is only possible on 230 V voltage supply. Example:
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
5|Electrical connection

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5.3 Connection of the driving motor with part winding circuit
Designation on the name plate
Y/YY
400 V
Direct start YY with bridges PW - start-up Y/YY without bridges
Example:
L3L1 L2
U1
V1 W1
W2
U2
V2
L3L1 L2
U1
V1 W1
W2
U2
V2
L3
L1 L2
PW II
PW I
5|Electrical connection
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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5.4 Circuit diagramm for direct start 400 V Y
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 High pressure safety monitor
BP2 Safety chain (high/low pressure monitoring)
BT3 Release switch (thermostat)
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

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5|Electrical connection
5.5 Electronic trigger unit INT69 G
5.6 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. 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

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5|Electrical system
Relay position INT69 G
B2 12 14 11
Fig. 21
5.8 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
5.7 External connection INT69 G
BT1 Cold conductor (PTC
sensor) motor winding
BT2 Heat protection thermo-
stat (PTC sensor)
EB1 Oil sump heater
Οnderung
1
0
Datum Name
Datum
Bearb.
Gepr.
Norm
1
04.12.2009
bauknecht
08.05.2020
Urspr.
2
Ers. f.
3
Ers. d.
4
HG22e/34e HC
567
BOCK COMPRESSORS
8
=
+
9
Bl.
5Bl.
3
2
Schaltschrank
EB1 BT2
BT2
BT1
1 2 3 4 5 6 7 8 09 10 11 12
INT69G
Οnderung
1
0
Datum Name
Datum
Bearb.
Gepr.
Norm
1
04.12.2009
bauknecht
08.05.2020
Urspr.
2
Ers. f.
3
Ers. d.
4
HG22e/34e HC
567
BOCK COMPRESSORS
8
=
+
9
Bl.
5Bl.
3
2
Schaltschrank
EB1 BT2
BT2
BT1
1 2 3 4 5 6 7 8 09 10 11 12
INT69G
Switch cabinet
Terminal Box
Fig. 22

20
D
GB
F
E
96116-01.2021-DGbFE
6|Commissioning
6.1 Preparations for start-up
6.4 Evacuation
First evacuate the system and then include the compressor in the evacuation process.
Relieve the compressor pressure.
Open the suction and pressure line shut-off valves.
Evacuate the suction and discharge pressure sides using the vacuum pump.
At the end of the evacuation process, the vacuum should be < 1.5 mbar when the pump is switched off.
Repeat this process as often as is required.
The compressor has undergone trials in the factory and all functions have been tested. There are
therefore no special running-in instructions.
Check the compressor for transport damage!
INFO To protect the compressor against inadmissible operating conditions,
high pressure and low pressure pressostats are mandatory on the
installation side.
ATTENTION Do not start the compressor if it is under vacuum. Do not apply
any voltage - even for test purposes (must only be operated with
refrigerant).
Under vacuum, the spark-over and creepage current distances of the
terminal board connection bolts shorten; this can result in winding and
terminal board damage.
6.3 Leak test
Carry out the leak test on the refrigerating plant in accordance with EN 378-2 or a corresponding
safety standard, while always observing the maximum permissible overpressure for the compressor.
DANGER Risk of bursting!
The compressor must only be pressurised using nitrogen (N2).
Never pressurise with oxygen or other gases!
The maximum permissible overpressure of the compressor must
not be exceeded at any time during the testing process (see name
plate data)! Do not mix any refrigerant with the nitrogen as this
could cause the ignition limit to shift into the critical range.
6.2 Pressure strength test
The compressor has been tested in the factory for pressure integrity. If however the entire system is
to be subjected to a pressure integrity test, this should be carried out in accordance with EN 378-2
or a corresponding safety standard without the inclusion of the compressor.