Ingersoll-Rand GHH RAND SILU CS1050 LITE User manual

EN
Operating manual
(Translation of the original instructions)
47757782 A
SILU CS85
SILU CS1050 LITE
SILU CS1050 IC
www.ingersollrand.com/ghhrandtransport

2 47757782 A
DE WICHTIG!
Die Betriebsanleitung liegt in Ihrer Landessprache zusammen mit der Montageanleitung (englische
und deutsche Ausführung) elektronisch auf der Webseite www.ingersoll.com/ghhrandtransport für den
Download bereit. Auf Anfrage senden wir Ihnen auch gerne eine gedruckte Version zu.
EN IMPORTANT!
The operating instructions can be downloaded electronically in your language, together with the mount‑
ing instructions (in English and German) from the website www.ingersollrand.com/ghhrandtransport.
On request, we will gladly send you a printed version.
CZ DŮLEŽITÉ!
Návod k provozu je k dispozici ke stažení v jazyce Vaší dané země společně s návodem pro montáž (ang‑
lická nebo německá verze) elektronicky na webové stránce www.ingersollrand.com/ghhrandtransport.
Na vyžádání vám rádi zašleme i tištěnou verzi.
DK VIGTIGT!
Denne driftsvejledning på dit lands sprog ligger elektronisk og klar til download sammen med monte‑
ringsvejledningen (engelsk og tysk version) på hjemmesiden www.ingersollrand.com/ghhrandtransport.
Efter forespørgsel sender vi dig også gerne en trykt version.
ES ¡IMPORTANTE!
El manual de instrucciones en su idioma junto a las instrucciones de montaje (en inglés y alemán) está
disponible para su descarga en formato electrónico en www.ingersollrand.com/ghhrandtransport. Si lo
desea, podemos enviarle también un ejemplar en papel.
FR IMPORTANT!
Vous pouvez télécharger la manuel d’utilisation dans la langue de votre pays avec les instructions de
montage (en anglais et en allemand) au format électronique sur le site web www.ingersollrand.com/
ghhrandtransport. Sur demande, nous vous enverrons volontiers une version imprimée.
IT IMPORTANTE!
Le istruzioni d’esercizio sono disponibili in formato elettronico per il download sul sito www.ingersollrand.com/
ghhrandtransport in lingua italiana, insieme alle istruzioni per il montaggio (edizione in inglese e in tede‑
sco). Su richiesta saremo lieti di inviarvene anche una copia in formato cartaceo.
NL BELANGRIJK!
De gebruikshandleiding kan samen met de montagehandleiding (Engelse en Duitse versie) in uw taal
elektronisch worden gedownload van de website www.ingersollrand.com/ghhrandtransport. Op aan‑
vraag sturen we u met alle plezier ook een gedrukte versie.
PL WAŻNE!
Instrukcja obsługi dostępna jest w ojczystym języku użytkownika wraz z instrukcją montażu (w języku
angielskim i niemieckim) w elektronicznej formie do pobrania na stronie internetowej
www.ingersollrand.com/ghhrandtransport. Na życzenie chętnie prześlemy Państwu również wersję dru‑
kowaną.

47757782 A 3
PT IMPORTANTE!
O manual de instruções está pronto para ser descarregado na sua língua-mãe, juntamente com o
manual de montagem (versão em inglês e alemão), em formato eletrónico na página web
www.ingersollrand.com/ghhrandtransport. A pedido, podemos também fornecer-lhe uma versão im‑
pressa.
SE VIKTIGT!
Bruksanvisningen går att hämta elektroniskt på landets språk tillsammans med monteringsanvisningen
(på engelska och tyska) på webbsajten www.ingersollrand.com/ghhrandtransport. På begäran skickar vi
även gärna ett tryckt exemplar.
FI TÄRKEÄÄ!
Suomenkielisen käyttöohjeen ja (englannin‑ ja saksankielisen) asennusohjeen voi ladata sähköisessä
muodossa osoitteesta www.ingersollrand.com/ghhrandtransport. Pyydettäessä lähetämme myös tulos‑
tetun version.
RO IMPORTANT!
Instrucțiunile de exploatare în limba țării dvs., împreună cu instrucțiunile de montaj (versiunea în
limba engleză și germană) sunt disponibile pentru descărcare în format electronic pe site-ul web
www.ingersollrand.com/ghhrandtransport. De asemenea, la cerere vă putem trimite o versiune tipărită.
HU FONTOS!
Az üzemeltetési útmutató az Ön nyelvén a szerelési útmutatóval (angol és német nyelvű változat) együtt
elektronikusan letölthető a www.ingersollrand.com/ghhrandtransport webhelyről. Kérésére szívesen
küldünk egy kinyomtatott változatot is.
BY ВАЖНА!
Электронную версію кіраўніцтва па эксплуатацыі на нацыянальнай мове разам з інструкцыяй па
мантажы (на англійскай і нямецкай мовах) можна спампаваць на сайце www.ingersollrand.com/
ghhrandtransport. Па асобным запыце мы з задавальненнем дашлем вам друкаваную версію.
LT SVARBU!
Elektroninę eksploatavimo instrukcijos Jūsų šalies kalba versiją kartu su montavimo instrukcija (anglų ir
vokiečių kalbomis) galite atsisiųsti iš interneto svetainės www.ingersollrand.com/ghhrandtransport.
Jei pateiksite užklausą, mielai atsiųsime ir išspausdintą versiją.

4 47757782 A
Introduction
Before installing and commissioning the SILU CS85 screw compressor or the SILU CS1050 LITE,
SILUCS1050 IC compressor units, please read through these operating instructions carefully (the addi‑
tional designation SILU is not used in the rest of these operating instructions).
The operating manual contains important instructions which must be strictly followed if trouble‑free
operation and a long service life are to be ensured.
Scope of application of the operating manual
These operating instructions only contain instructions for the above‑mentioned screw compressor and
the above‑mentioned screw compressor units. These operating instructions are not valid for operation of
a compressor unit completed by an external installer.
Target group
The operating manual is intended for use by qualied specialist sta only.
Notes and safety instructions
The following instructions and safety instructions are used in the operating manual to warn of dangers
which could lead to operating errors, injuries and tangible damage:
DANGER
DANGER warns of an imminent danger and indicates an imminent danger. This safety note warns of
possible irreversible to fatal injuries.
WARNING
WARNING indicates a possible imminent danger. This safety note warns of serious or perilous injuries.
CAUTION
CAUTION indicates a possible imminent danger. This safety note warns of light injuries.
NOTICE
ATTENTION warns of possible tangible damage or malfunctions.
NOTE
NOTES contain instructions to prevent operating errors and other specic useful or important informa‑
tion.

47757782 A 5
Contents
 .................................................................................................................................... 
1.1 Application ....................................................................................................................................7
1.2 Manufacturer's address ...............................................................................................................7
1.3 Identication.................................................................................................................................7
1.4 Information for enquiries and orders .........................................................................................7
1.5 Service & Support .........................................................................................................................7
1.6 Technical data CS85 screw compressor.......................................................................................8
1.7 Technical data CS1050 compressor units....................................................................................9
1.8 Operating the compressor at high altitudes.............................................................................10
1.9 Lubricant .....................................................................................................................................10
1.10 Screw compressor type plate.....................................................................................................11
1.11 Compressor unit type plate........................................................................................................11
 ..................................................................................................................................... 
2.1 General........................................................................................................................................12
2.2 Authorised personnel, training and qualication.....................................................................12
2.3 Safety‑conscious work................................................................................................................12
2.4 Safety instructions for the owner/operator ..............................................................................12
2.5 Unauthorised conversions and spare parts..............................................................................13
2.6 Incorrect operating methods.....................................................................................................13
2.7 Disposal.......................................................................................................................................13
  ............................................................................................................................. 
3.1 Safety during operation .............................................................................................................14
3.2 Initial commissioning.................................................................................................................14
3.3 Installation ..................................................................................................................................15
3.4 Switching on ...............................................................................................................................15
3.5 Monitoring operation.................................................................................................................16
3.5.1 CS85/external installation..........................................................................................................16
3.5.2 CS1050 LITE.................................................................................................................................16
3.5.3 CS1050 IC ....................................................................................................................................18
3.6 External oil cooler for compressor (optional) ..........................................................................19
3.6.1 Function control of external oil cooler fan................................................................................19
3.7 Switching o ...............................................................................................................................20
3.8 Preservation................................................................................................................................20
 ........................................................................................................... 
4.1 Safety...........................................................................................................................................21
4.2 Observe the tightening torques ................................................................................................21
4.3 Maintenance Intervals................................................................................................................22
4.4 Maintenance work......................................................................................................................23
4.4.1 Readjusting the tension of the V‑belts and quick‑release bushings of the V‑belt pulleys .....23
4.4.2 Retightening the fastening screws on the discharge silencer.................................................25
4.4.3 Checking the oil level..................................................................................................................26
4.4.4 Cleaning and replacing the intake lter element.....................................................................27
4.4.5 Check the safety valve ................................................................................................................28
4.4.6 Check the non-return ap..........................................................................................................29
4.4.7 Testing and cleaning the air cooler ...........................................................................................29
4.4.8 Oil change and cleaning the oil intake strainer........................................................................30

6 47757782 A
  .............................................. 

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
1 General
1.1 Application
GHH RAND builds and supplies the CS85 screw compressor and the CS1050 screw compressor unit.
Because of their oil‑free compression of atmospheric air and their power‑to‑weight ratio for installation
on silo vehicles, the compressor unit is used to pneumatically convey bulk goods, such as our, sugar,
salt, animal feed, powdered chemicals, dry granulate, soda, cement, sand, lime, plaster, etc.
The products built and supplied by GHH RAND are only designed for the operation at and on utility vehi‑
cles that exclusively drive on paved roads.
A dierent use requires consultation with the manufacturer.
1.2 Manufacturer's address
GHH RAND
Schraubenkompressoren GmbH
Max-Planck-Ring 27
46049 Oberhausen
1.3 Identication
For the machine data, refer to the accompanying documents and the rating plate.
In order to always have the data on hand, we recommend that you enter it into the following blank
space.
Compressor serial no.:
Unit serial no.:
1.4 Information for enquiries and orders
If you have enquiries or orders for spare parts and accessories, please provide details of the exact type
designation and the serial number of the screw compressor or the compressor unit, for which the spare
part or accessory is intended.
CAUTION

Original replacement parts and accessories that are authorised by the manufacturer represent safety
factors. The use of non‑original or non‑authorised replacement parts and accessories may void the
liability for the resulting consequences.
‣Only use original spare parts and accessories authorised and approved by the manufacturer.
1.5 Service & Support
www.ingersollrand.com/ghhrandtransport

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
1.6 Technical data CS85 screw compressor
 
Length (approx.) mm 615 min. rpm 1000
Width (approx.) mm 290 max. rpm 2000
Height (approx.) mm 396
Weight (approx.) kg 149
 
max. 2.5bar approx. 8.5litres
 
max. 65mbar min. 0.3bar
  CS85
Rotary valve compressor rpm 1000 1500 2000
  1.5
Intake volume m³/h 435 724 989
Coupling output kW 20.5 33.1 47.7
Final temperature °C 147 143 150
Intake temperature max. °C 50 50 50
Intake temperature min. °C ‑20 ‑20 ‑20
  2.0
Intake volume m³/h 420 710 975
Coupling output kW 25.0 39.2 55.4
Final temperature °C 183 171 175
Intake temperature max. °C 50 50 50
Intake temperature min. °C ‑20 ‑20 ‑20
  2.5
Intake volume m³/h 404 695 962
Coupling output kW 29.6 45.6 63.4
Final temperature °C 223 201 202
Intake temperature max. °C 36 46 45
Intake temperature min. °C ‑20 ‑20 ‑20

Feed medium: atmospheric air
Intake pressure: 1 bar (abs.)
Intake temperature: 20 °C
Technical data without intake or pressure losses

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
1.7 Technical data CS1050 compressor units
 CS1050
LITE R-PTO L
CS1050
LITE L-PTO R
CS1050
IC R-PTO L
CS1050
IC L-PTO R
Width (approx.) mm 834 845 905 926
Depth (approx.) mm 723 723 775 776
Height (approx.) mm 713 717 716 739
Weight (approx.) kg 296 297 399 399
  
Compressor unit drive speed rpm 800 1200 1600
V‑belt drive transmission ratio (standard) 1.25
CS85 compressor rotational speed rpm 1000 1500 2000
* Transmission ratio may vary. Several V‑belt drives are available from the factory for the transmission ratio (adjustable to the auxil‑
iary drive installed in the vehicle).
NOTICE

Exceeding the permitted speed range leads to material damage.
‣Do not operate the compressor outside of its permitted speed range.
 
max. 2.5bar approx. 8.5litres
 
max. 65mbar min. 0.3bar
NOTE
The performance data of the CS1050 compressor unit correspond to screw compressor CS85 (Chapter
1.6 on page 8).

10 47757782 A
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1.8 Operating the compressor at high altitudes
If operating the compressor at high altitudes, make sure that, depending on the existing ambient pres‑
sure, the operating overpressure must be reduced in order to prevent temperature damage to the com‑
pressor.
This should be carried out in accordance with the following table:
Installation height h [m] 0 1000 1500 2000 2500 3000 3500 4000 4500
Permitted operating overpres‑
sure ppermitted [bar]
2.53 2.25 2.11 1.99 1.87 1.75 1.64 1.54 1.44
NOTICE

An ambient temperature outside the permitted range can result in damage to the compressor.
‣The existing ambient temperature or intake temperature must be in the range ‑20 °C to +36 °C.
1.9 Lubricant
We recommend using our fully synthetic high‑perfor‑
mance lubricant, Silol.
If you use exclusively Silol or Silol FG (foodgrade)
the interval for an oil change  to a max. 12
. The period of the manufacturer's warranty
for new compressor units  to .
NOTE
For recognition of the guarantee extension, proof
of the maintenance interval using Silol or Silol FG
is required.
Depending on the operating conditions, brand‑
name motor oils with API classication SJ/CF as per
SAEJ183 can also be used.
The respective viscosity class (SAE class) can be taken
from the following diagram.
Application range ambient temperature [°C]

47757782 A 11

1.10 Screw compressor type plate
The type plate is attached to the side of the screw compressor. It contains the following information:
·Type
·Serial number
·Rotational speed range
·Max. volume ow
·At max. operating pressure
·Max. power consumption
NOTE
The complete identication has certicate value and may not be changed or rendered illegible.
1.11 Compressor unit type plate
The type plate on the compressor unit is attached to the mounting console.
It contains the following information:
·Type
·Year of Manufacture
·Compressor serial no.
·Unit serial no.
·V‑belt drive ratio
·Unit drive speed
·Intake volume
·Max. operating pressure
NOTE
The complete identication has certicate value and may not be changed or rendered illegible.

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
2 Safety
2.1 General
This operating manual contains basic instructions to be followed during operation and maintenance/
repair. Therefore, this operating manual must be read by the responsible technical sta/operator prior to
commissioning and it must always be available at the place of use for the screw compressor.
2.2 Authorised personnel, training and qualication
Work carried out on the compressor, such as operation and maintenance/repair, must only be carried
out by persons with the appropriate authorisation, training and qualications, who are familiar with the
valid safety regulations.
Repairs or modications must only be performed by authorised personnel who is available at any time at
the service sites or at GHH RAND.
2.3 Safety-conscious work
The essential safety‑related regulations for installation, operation and maintenance/repair of air com‑
pressors are contained in the following publications:
Machinery Directive 2006/42/EC
Standards, in particular:
DIN EN ISO 12100‑1/2 Safety of machinery
DIN EN 1012‑1 Compressors and vacuum pumps, safety requirements
The regulations of the professional associations, in particular:
BGI 666 Sample operating instructions for operation of container vehicles for
granular or dust‑like goods (silo vehicles).
In this context, the respectively last applicable versions of these regulations shall be authoritative. Spe‑
cial legal provisions and regulations, particularly safety regulations, that may apply in your company or
due to local conditions must also be adhered to. In case of competing regulations, the more restrictive
provisions shall be applied. You must also observe any national regulations in the respective country of
use.
2.4 Safety instructions for the owner/operator
The owner/operator is responsible for ensuring that the screw compressor is in a safe operational condi‑
tion. Damaged or faulty parts must be immediately replaced. If the screw compressor is used to convey
combustible materials, make sure that the temperature remains below the spontaneous ignition tem‑
perature for any dust/air mixture which may be created. In accordance with the professional association
regulation BGI 666, for the pneumatic transport of materials subject to dust explosion, a temperature
limit of max. 120 °C must be adhered to (measurement point before contact with the materials to be
conveyed).

47757782 A 13

2.5 Unauthorised conversions and spare parts
Conversions and modications to the screw compressor and screw compressor unit are not permitted.
Damage to the seal will void any warranty claims. Original replacement parts and accessories that are
authorised by the manufacturer represent safety factors. The use of non‑original or unauthorised re‑
placement and accessory parts may void the liability for resulting consequences.
2.6 Incorrect operating methods
WARNING

The operation of the compressor under incorrect conditions may lead to serious injuries and signicant
material damage.
‣The compressor must only be operated under permitted conditions.
Unless approval is obtained from GHH RAND, the compressor must only be operated under the condi‑
tions stated in Chapter 1.6 on page 8 to Chapter 1.8 on page 10.
2.7 Disposal
Compressor components, as well as operating materials used in conjunction with the screw compressor
and compressor unit must be disposed of observing the local regulations.

14 47757782 A

3 Operation
3.1 Safety during operation
NOTE
Also observe the safety instructions in Chapter 2 on page 12.
DANGER

For the conveyance of combustible, dust‑like materials, the temperature of the compressed air at the
measurement point directly before contact with the material to be conveyed may not exceed the maxi‑
mum value of 120 °C.
‣If the maximum temperature is exceeded, switch o the compressor immediately.
CAUTION

A greater acoustic pressure level can result in damage to hearing.
‣Wear hearing protection.
CAUTION

During operation, the compressor is very hot. There is a risk of burning on hot machine parts.
‣Wear protective gloves.
NOTICE

Exceeding the max. running time results in tangible damage due to overheating.
‣Adhere to the max. running time: 3 hours running time and a subsequent 1 hour pause.
NOTICE

Exceeding the max. operating pressure results in tangible damage due to overheating.
‣Do not operate the compressor at an operating pressure of more than 2.5bar.
‣In the event of operating at high altitudes, adapt the operating pressure.
‣If exceeded, switch o the compressor.
3.2 Initial commissioning
Initial commissioning of the compressor is usually carried out on the premises of the system manufactur‑
er.
It includes removing the preservation, lling the oil tank and checking the direction of rotation.

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3.3 Installation
‣Park the vehicle in as level a position as possible.
‣Observe the permitted inclination.
Permitted inclination
NOTICE

Excessive inclination results in irregular level of
lubricant in the housing.
‣Observe the maximum permitted inclination of
the screw compressor during operation:
·To the front and to the rear: 10°
·To the right and left: 10°
3.4 Switching on
NOTICE

If the compressor is started if there is counter pressure, there is the risk of damage to the non‑return
ap due to blowback of material.
‣Only start the compressor when completely depressurised.
‣Never go into operation against a potentially existing counter pressure.
NOTICE

For vehicles with side cladding installed, the side
cladding must be folded down or removed before
switching on the compressor unit in order to pre‑
vent temperature damage to the compressor.
‣Ensure sucient fresh air supply.
‣Switch on power take-o.

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3.5 Monitoring operation
3.5.1 CS85/external installation
The manufacturer installs a gauge (measurement position in the following pipeline) pneumatic system
to monitor the compression pressure. The system manufacturer or external installer must also install
displays that monitor the intake negative pressure and the oil pressure of the compressor stage. For the
operation and control of the operating displays, only the instructions from the manufacturer are applica‑
ble. The permitted operating conditions and limit values can be found in Chapter 1.6 on page 8 to
Chapter 1.8 on page 10.
NOTE
With external installations, displays from diverse manufacturers can be installed. Also observe the
instructions from the manufacturer.
3.5.2 CS1050 LITE
Oil pressure gauge
The oil pressure is displayed on the oil pressure
gauge (1). The oil pressure may not drop below
0.3bar.
NOTICE

If the oil pressure is insucient, signicant tangi‑
ble damage can occur.
‣Do not fall below the minimum permitted oil
pressure.
‣If, after a short time of operation, no oil pres‑
sure is built up, switch o the compressor and
check the oil level, as necessary clean the oil
intake strainer.
1

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Maintenance indicator variant 1
The negative pressure in the compressor is displayed
on the maintenance indicator (1).
The negative pressure must not exceed 65 mbar (red
area on the maintenance indicator).
NOTICE

Excessive negative pressure (> 65 mbar) can result
in overheating and damage to the compressor.
‣Clean the intake lter elements of the compres‑
sor or, in the event of excessive clogging, re‑
place the lter (Chapter 4.4.4 on page 27).
Resetting the maintenance indicator
If the negative pressure has dropped to below the permitted limit (65 mbar, red area on the maintenance
indicator), the maintenance indicator must be reset after rectication of the malfunction.
‣Push the button (2) on the front of the maintenance indicator (1).
Maintenance indicator variant 2
The negative pressure in the compressor is displayed
on the maintenance indicator (2).
The negative pressure must not exceed 65mbar. The
service display (1) is then red.
NOTICE

Excessive negative pressure (> 65 mbar) can result
in overheating and damage to the compressor.
‣Clean the intake lter elements of the compres‑
sor or, in the event of excessive clogging, re‑
place the lter (Chapter 4.4.4 on page 27).
Resetting the maintenance indicator
If the negative pressure has exceeded the permitted limit (service display (1) is red), the maintenance
indicator must be reset after rectication of the malfunction.
‣Push the button (3) on the top of the maintenance indicator (2).

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3.5.3 CS1050 IC
1. Cooling fan speed selector switch
2. Operation and fault monitoring
3. Compressed air temperature indicator
4. Negative pressure maintenance indicator
5. Oil pressure display
Once the compressor unit has started and the min. oil pressure has been reached, the control unit
switches on automatically.
Oil pressure display
The oil pressure is displayed on the oil pressure gauge. The oil pressure may not drop below 0.3 bar.
NOTICE

If the oil pressure is insucient, signicant tangible damage can occur.
‣Do not fall below the minimum permitted oil pressure.
‣If, after a short time of operation, no oil pressure is built up, switch o the compressor and check
the oil level, as necessary clean the oil intake strainer.
Negative pressure maintenance indicator
The negative pressure in the compressor is displayed
on the maintenance indicator (1).
The negative pressure must not exceed 65 mbar (red
area on the maintenance indicator).
NOTICE

Excessive negative pressure (> 65 mbar) can result
in overheating and damage to the compressor.
‣Clean the intake lter elements of the compres‑
sor or, in the event of excessive clogging, re‑
place the lter (Chapter 4.4.4 on page 27).

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Resetting the maintenance indicator
If the negative pressure has dropped to below the permitted limit (65 mbar, red area on the maintenance
indicator), the maintenance indicator must be reset after rectication of the malfunction.
‣Push the button (2) on the front of the maintenance indicator (1).
Operation and fault monitoring
The operating display lights up green continuously when the compressor is operating.
The operating display does not light up if the oil pressure is too low.
NOTICE

To prevent temperature damage to the compressor unit if the fan fails for emergency operation, re‑
move the cover.
‣If a sheet of paper held in front of the fan screen is not pushed away from the fan when it is run‑
ning, remove the cover.
Compressed air temperature indicator
The compressed air temperature is measured after the cooling air outlet and indicated on the com‑
pressed air temperature indicator.
Cooling fan speed selector switch
The fan speed can be set in two positions with the selector switch:
·Left pos.: "HOT" reduced cooling power
·Right pos.: "COOL" maximum cooling power
3.6 External oil cooler for compressor (optional)
To ensure that the compressor has an optimum service life even under extreme conditions, an external
oil cooler can be connected as an option.
3.6.1 Function control of external oil cooler fan
A sheet of paper held in front of the radiator of a running fan must be sucked towards it.
NOTICE

The compressor can be damaged if the fan is defective.
‣Check that the fan works.
·The paper is sucked in by the fan.

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3.7 Switching o
NOTICE

If the compressor is switched o if there is counter pressure, there is the risk of damage to the non-
return ap due to blowback of material.
‣Do not turn compressor o if there is counter pressure!
‣If there is counter pressure, take appropriate measures to reduce pressure before switching o the
compressor.
NOTE
The non-return ap installed in the compressor unit prevents the compressor from running backwards
rapidly and for a long time (as a result of residual pressure in the compressed air lines of the pneumat‑
ic system) after being shut down.
‣Switch o power take-o.
NOTE
Before switching o, do not manually reduce the compressor speed using the speed control.
NOTICE

The compressed air line ruptures if it is not disconnected from the compressor unit before starting the
journey. Internal components of the compressor unit can also be damaged.
‣Disconnect the compressed air line from the compressor unit before starting journey.
NOTE
After switching o the IC compressor unit, the fan of the air cooler continues to run until the air tem‑
perature in the IC unit is below 50 °C.
3.8 Preservation
If the compressor is shut down for an extended period of time, the compressor must be protected from
corrosion damage using a preservative. Please consult the manufacturer for a recommendation of a
suitable preservative.