BUSCH Fossa FO 0015 A User manual

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FOSSA
Scroll Vacuum Pumps
FO 0015 A, FO 0035 B
Instruction Manual
0870573863 | B0007_en-US | Original instructions 2/8/2023

Table of Contents
2 | 40 Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en
Table of Contents
1 Safety ..................................................................................................................................................................... 4
2 Product Description ............................................................................................................................................. 5
2.1 Operating Principle............................................................................................................................................. 6
2.2 Intended Use ....................................................................................................................................................... 6
2.3 Standard Features............................................................................................................................................... 7
2.3.1 Non-return Valve .................................................................................................................................. 7
2.3.2 Inlet Screen ........................................................................................................................................... 7
2.3.3 Operating Hours Counter.................................................................................................................... 7
2.3.4 Variable Speed Drive (Single-phase Version Only) ........................................................................... 7
2.3.5 I/O and Communication Port (Single-phase Version Only)............................................................. 7
2.4 Optional Accessories........................................................................................................................................... 7
2.4.1 Inlet Filter .............................................................................................................................................. 7
2.4.2 Exhaust Filter......................................................................................................................................... 7
2.4.3 Gas Ballast Valve................................................................................................................................... 7
2.4.4 Purge Gas Adapter ............................................................................................................................... 7
2.4.5 Wheels.................................................................................................................................................... 7
2.5 Optional Variants ................................................................................................................................................ 8
2.5.1 ATEX (Optional) ..................................................................................................................................... 8
2.5.2 Oxygen (Optional) ................................................................................................................................ 8
3 Transport............................................................................................................................................................... 9
4 Storage................................................................................................................................................................... 10
5 Installation............................................................................................................................................................ 11
5.1 Installation Conditions ....................................................................................................................................... 11
5.2 Connecting Lines / Pipes .................................................................................................................................... 12
5.2.1 Suction Connection .............................................................................................................................. 12
5.2.2 Discharge Connection.......................................................................................................................... 13
5.3 Gas ballast Valve Installation (Optional)........................................................................................................... 13
6 Electrical Connection ........................................................................................................................................... 14
6.1 Machine delivered with a Variable Speed Drive.............................................................................................. 14
6.2 Single-Phase Version .......................................................................................................................................... 15
6.2.1 I/O and Communication Port Schematic (Single-phase Version Only).......................................... 15
6.3 Three-Phase Version........................................................................................................................................... 16
6.3.1 Wiring Diagram Three-Phase Motor.................................................................................................. 16
7 Commissioning ..................................................................................................................................................... 18
7.1 Conveying Condensable Vapors........................................................................................................................ 18
7.1.1 Gas Ballast Valve Adjustment ............................................................................................................. 19
8 Maintenance ......................................................................................................................................................... 20
8.1 Maintenance Schedule ....................................................................................................................................... 20
8.2 Tip Seal Replacement.......................................................................................................................................... 21
8.3 Non-Return Valve Change.................................................................................................................................. 28
9 Overhaul ................................................................................................................................................................ 30
10 Decommissioning ................................................................................................................................................. 31
10.1 Dismantling and Disposal .................................................................................................................................. 31
11 Spare Parts Kits..................................................................................................................................................... 32
11.1 Overview............................................................................................................................................................... 32
11.2 Available Kits........................................................................................................................................................ 32
12 Accessories ............................................................................................................................................................ 33

Table of Contents
Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en 3 | 40
13 Troubleshooting ................................................................................................................................................... 34
14 Technical Data ...................................................................................................................................................... 35
15 EU Declaration of Conformity ............................................................................................................................. 36
16 UK Declaration of Conformity............................................................................................................................. 37

1 | Safety
4 | 40 Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en
1 Safety
Prior to handling the machine, this instruction manual should be read and understood. If anything
needs to be clarified, please contact your Busch representative.
Read this manual carefully before use and keep for future reference.
This instruction manual remains valid as long as the customer does not change anything on the
product.
The machine is intended for industrial use. It must be handled only by technically trained personnel.
Always wear appropriate personal protective equipment in accordance with the local regulations.
The machine has been designed and manufactured according to state-of-the-art methods. Never-
theless, residual risks may remain, as described in the following chapters and in accordance with the
chapter Intended Use [➔6]. This instruction manual highlights potential hazards where appropri-
ate. Safety notes and warning messages are tagged with one of the keywords DANGER, WARNING,
CAUTION, NOTICE and NOTE as follows:
DANGER
... indicates an imminent dangerous situation that will result in death or serious injuries if not
prevented.
WARNING
... indicates a potentially dangerous situation that could result in death or serious injuries.
CAUTION
... indicates a potentially dangerous situation that could result in minor injuries.
NOTICE
... indicates a potentially dangerous situation that could result in damage to property.
NOTE
... indicates helpful tips and recommendations, as well as information for efficient and trou-
ble-free operation.

Product Description | 2
Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en 5 | 40
2 Product Description
AF
COMEB FH
GBC
IN IS MC OOS
NP
NRVOUT OHC
, , ,
Description
AF Axial fan COM I/O and communication port (single-phase
version only)
EB Eye bolt FH Fuse holder
GBC Gas ballast valve connection IN Suction connection
IS Inlet screen MC Mains connection
NP Nameplate NRV Non-return valve
OHC Operating hours counter OOS On/off-switch (single-phase version only)
OUT Discharge connection
NOTE
Technical term.
In this instruction manual, we consider that the term ‘machine’ refers to the ‘vacuum pump’.
NOTE
Illustrations
In this instruction manual, the illustrations may differ from the machine appearance.

2 | Product Description
6 | 40 Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en
2.1 Operating Principle
21
3
6
4
5
Description
1 Compression cycle 2 Gas inlet (IN)
3 Gas outlet (OUT) 4 Fixed scroll
5 Orbiting scroll 6 Gas process pocket
Scroll vacuum pumps consist of both a fixed and an orbiting scroll. As the orbiting scroll moves,
voids are created at the inlet of the pump, drawing in the gas. As the rotor further moves, the gas is
steadily compressed until it is discharged to atmosphere at the pump exhaust.
The compression is made without the use of any lubrication whatsoever.
NOTICE
Lubricating a dry running machine (compression chamber).
Risk of damage to the machine!
●Do not lubricate the compression chamber of the machine with oil or grease.
2.2 Intended Use
WARNING
In case of foreseeable misuse outside the intended use of the machine.
Risk of injuries!
Risk of damages to the machine!
Risk of damages to the environment!
●Make sure to follow all instructions described in this manual.
The machine is intended for the suction of air and other dry, toxic, non-aggressive and non-explo-
sive gases.
Conveying of other media leads to an increased thermal and/or mechanical load on the machine
and is permissible only after a consultation with Busch.
Depending on the optional variant, the machine may be used for ATEX or oxygen applications, see
Optional Variants [➔8].
The machine is gas tight when a gas ballast valve is not installed.

Product Description | 2
Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en 7 | 40
The machine is suitable for continuous operation.
The continuous operation of FO 0035 B is limited to a suction pressure of 100 hPa (mbar) abs..
Permitted environmental conditions, see Technical Data [➔35].
The machine is capable of conveying gases which contain a certain percentage of water vapor if the
gas ballast valve (accessory) is installed and open. See chapters Conveying Condensable Vapors
[➔18] and Technical Data [➔35].
2.3 Standard Features
2.3.1 Non-return Valve
The non-return valve (NRV), integrated to the discharge connection (OUT), protects the process
against suckback.
2.3.2 Inlet Screen
The inlet screen (IS), integrated to the suction connection (IN), prevents large solid particles from en-
tering into the machine.
2.3.3 Operating Hours Counter
The opperating hours counter allows the reading of the total operating time that the machine has
run.
2.3.4 Variable Speed Drive (Single-phase Version Only)
The machine is equipped in standard with a variable speed drive.
2.3.5 I/O and Communication Port (Single-phase Version Only)
The D-Sub 9 supports maintained dry contact remote control and monitoring of the machine.
2.4 Optional Accessories
2.4.1 Inlet Filter
The inlet filter protects the machine against dust and other solids in the process gas. The inlet filter
is available with a cartridge.
The inlet filter protects the machine against dust and other solids in the process gas. The inlet filter
is available with a cartridge.
2.4.2 Exhaust Filter
The exhaust filter reduces the exhaust noise and retains the tip seal dust when the machine cannot
be connected to a house exhaust system.
2.4.3 Gas Ballast Valve
The gas ballast valve mixes the process gas with a limited quantity of ambient air to counteract the
condensation of vapor inside the machine.
2.4.4 Purge Gas Adapter
The purge gas adapter can be fitted in place of the gas ballast valve. It allows you to connect a con-
trolled supply of inert gas to the pump.
2.4.5 Wheels
Four wheels can easily be fitted to the bottom of the machine to facilitate transportation and instal-
lation.

2 | Product Description
8 | 40 Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en
2.5 Optional Variants
2.5.1 ATEX (Optional)
According to ATEX classification, refer to the nameplate (NP), explosive gases and vapor mixtures
(zone 2) can be drawn in according to the scope of the Directive ATEX 2014/34/EU.
2.5.2 Oxygen (Optional)
The machine is designed for conveying gases with an increased oxygen content (volume content
greater than 21% and up to 100%) if the following label is stuck on the machine body:

Transport | 3
Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en 9 | 40
3 Transport
WARNING
Suspended load.
Risk of severe injury!
●Do not walk, stand or work under suspended loads.
●Make sure that the eye bolt(s) (EB) is/are in faultless condition, fully screwed in and tightened by
hand.
●Check the machine for transport damage.
If the machine is secured to a base plate:
●Remove the machine from the base plate.

4 | Storage
10 | 40 Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en
4 Storage
●Seal all apertures with adhesive tape or reuse provided caps.
NOTICE
Long storage time.
Risk of damage to the machine!
●Due to a long storage time the capacitors of the variable speed drive can lose efficiency because
of electrochemical processes. In the worst case, it can lead to a short-circuit and therefore to a
damage to the variable speed drive of the machine.
●Connect the machine every 18 months for 30 minutes to the mains.
If the machine is to be stored for more than 3 months:
●Wrap the machine in a corrosion inhibiting film.
●Store the machine indoors, dry, dust free and if possible in original packaging preferably at
temperatures between -20 ... 60 °C.

Installation | 5
Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en 11 | 40
5 Installation
5.1 Installation Conditions
WARNING
The installation conditions are not respected in an ATEX environment.
Risk of severe injury!
Risk of explosion!
●Take care that the installation conditions are met.
NOTICE
Use of the machine outside of the permitted installation conditions.
Risk of premature failure!
Loss of efficiency!
●Take care that the installation conditions are fully complied with.
~10 cm
~10 cm
~10 cm
~5 cm
●Make sure that the ambient conditions comply with the Technical Data [➔35].
●Make sure that the installation space or location is protected from weather and lightning.
●Make sure that the installation space or location is vented such that sufficient cooling of the ma-
chine is provided.
●Make sure that cooling air inlets and outlets are not covered or obstructed and that the cooling
air flow is not affected adversely in any other way.
●Make sure that enough space remains for maintenance work.
●Make sure that all provided covers, guards, hoods, etc. are mounted.
If the machine is installed at an altitude greater than 1000 meters above sea level:
●Contact your Busch representative, the motor should be derated or the ambient temperature
limited.

5 | Installation
12 | 40 Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en
If additional electrical components not included in scope of delivery should be added:
●Make sure that they have a better or equal ATEX classification than that of the machine, see the
ATEX marking on the nameplate (NP).
5.2 Connecting Lines / Pipes
WARNING
The connection lines can build up an electrostatic charge.
Risk of severe injury!
Risk of explosion!
●The connection lines must be made out of conductive material or provisions must be made
against creating an electrostatic charge.
●Remove all protective covers before installation.
●Make sure that the connection lines cause no stress on the connection of the machine; if neces-
sary use flexible joints.
●Make sure that the line size of the connection lines over the entire length is at least as large as
the connections of the machine.
In case of long connection lines, it is advisable to use larger line sizes in order to avoid a loss of effi-
ciency. Seek advice from your Busch representative.
5.2.1 Suction Connection
WARNING
Unprotected suction connection.
Risk of severe injury!
●Keep long hair, loose articles of clothing, etc. away from suction connection.
NOTICE
Ingress of foreign objects or liquids.
Risk of damage to the machine!
If the inlet gas contains dust or other foreign solid particles:
●Install a suitable filter (5micron or less) upstream from the machine.
NOTICE
Ingress of foreign objects or liquids.
Risk of damage to the machine!
If the inlet gas contains dust or other foreign solid particles:
●Install a suitable ATEX inlet filter (5micron or less) upstream from the machine.
Connection size(s):

Installation | 5
Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en 13 | 40
– ISO-KF 40
If the machine is used as part of a vacuum system:
●Busch recommends the installation of an isolation valve in order to prevent the process gases
and debris flowing back to the vacuum system.
5.2.2 Discharge Connection
Connection size(s):
– ISO-KF 16
– Without connection if an exhaust filter is installed.
5.3 Gas ballast Valve Installation (Optional)
1
2
3
Description
1 Gas ballast connection (GBC) 2 25 mm wrench
3 Gas ballast valve (GB) (accessory)
part no.: 0540 559 847

6 | Electrical Connection
14 | 40 Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en
6 Electrical Connection
DANGER
Live wires.
Risk of electrical shock.
●Electrical installation work must only be executed by qualified personnel.
CURRENT PROTECTION OF THE CUSTOMER INSTALLATION:
DANGER
Missing current protection.
Risk of electrical shock.
●Current protection according to EN 60204-1 must be insured by the customer on its installation.
●The electrical installation must comply with the applicable national and international standards.
NOTICE
Electromagnetic compatibility.
●Make sure that the motor of the machine will not be affected by electric or electromagnetic dis-
turbance from the mains, if necessary seek advice from Busch.
●Make sure that the EMC of the machine is compliant with the requirements of your supply net-
work system, if necessary provide further interference suppression (EMC of the machine, see EU
Declaration of Conformity [➔36] or UK Declaration of Conformity [➔37]).
6.1 Machine delivered with a Variable Speed Drive
NOTE
The variable speed drive is only available for ATEX classifications "C" and "D" (Outside no ATEX
zone).
NOTICE
Incorrect connection.
Risk of damage to the variable speed drive!
●The wiring diagrams given below are typical. Check the connection instructions/diagrams.
●Make sure that the power supply corresponds to the specification on the wiring diagram supplied
with the machine.
●If the machine is equipped with a power connector, install a residual current protective device to
protect persons in case of a defective insulation.

Electrical Connection | 6
Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en 15 | 40
●Busch recommends installing a type B residual protective device suitable for the electrical in-
stallation.
●If the variable speed drive is not equipped with a lockable disconnect switch, provide it on the
power line so that the machine is completely secured during maintenance tasks.
●Provide an overload protection according to EN 60204-1.
●Busch recommends installing a C-curve circuit breaker.
●Connect the protective earth conductor.
6.2 Single-Phase Version
●Electrically connect the machine directly to the mains connection (MC).
Connector: EN 60320-C14
On/off-switch (OOS):
O ► OFF = Variable Speed Drive (VSD) not powered
I ► ON = Variable Speed Drive (VSD) powered
Fuse holder (FH): 12.5 A, type F (F12.5)
6.2.1 I/O and Communication Port Schematic (Single-phase
Version Only)
Connector: D-Sub9, 9-pin, female
5 4 3 2 1
9 8 7 6
1
2
3
4
5
6
7
8
9
Pin Nr. Description Signal
* "Logic 0" : input voltage = 0 … 4 VDC
"Logic 1" : input voltage = 8 … 30 VDC
24 V Out
0 V / Ground
Digital Input 1
Digital Input 2*
Digital Input 3*
RS485, D+
RS485, D-
Fault relay IN
Fault relay OUT
Power supply (max. 100 mA)
Ground
Open: Stop
Closed: Start
Preset speed
DI2 / DI3
0 / 0 ► Standard speed
1 / 0 ► Boost speed
0 / 1 ► Idle speed
1 / 1 ► Boost speed
For reading status values (current, voltage, operating hours,
etc…) or parameters.
Contact NC (normally closed)
Umax = 100 VDC / Imax = 5 A
Communication port via Modbus (RS485):
Ask your Busch representative for more information.

6 | Electrical Connection
16 | 40 Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en
6.3 Three-Phase Version
●Provide a lockable disconnect switch on the power line so that the machine is completely secured
during maintenance tasks.
●Provide an overload protection according to EN 60204-1 for the motor.
●Busch recommends installing a D-curve circuit breaker.
●Electrically connect the machine, see Wiring Diagram Three-Phase Motor.
6.3.1 Wiring Diagram Three-Phase Motor
●Wire the mating connector (delivered loose) in accordance with the scheme below:
Mains connection (MC) 1 = Phase 1 (L1)
2 = Phase 2 (L2)
3 = Phase 3 (L3)
4 = Not used
PE = Earth
1 2
3
4
PE
●If necessary, change the connection type from star (factory default setting) to delta.
Accessing terminals:
Star connection (high voltage):
380-415 V (50 Hz), 380-480 V (60 Hz)
Factory default setting
Delta connection (low voltage):
190-220 V (50 Hz), 200-240 V (60 Hz)

Electrical Connection | 6
Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en 17 | 40
W2
V2
U2
U1
W1
V1
L1 L2 L3
PE
F2
F4
F1
H1
F3
H2
W2
V2
U2
U1 W1 V1
L1 L2 L3
PE
F2
F4
F1
H1
F3
H2
F1 ► motor fan wire 1 = White
F2 ► motor fan wire 2 = Brown
F3 ► motor fan wire 3 = Green
F4 ► motor fan wire 4 = Yellow
H1 ► counter wire 1
H2 ► counter wire 2
NOTICE
Incorrect direction of rotation.
Risk of damage to the machine!
●Operation in the wrong direction of rotation can destroy the machine in a short time! Prior to
start-up, ensure that the machine is operated in the right direction.
●Determine the intended direction of rotation with the arrow (stuck on or cast).
●Jog the motor briefly.
●With a phase rotation tester, check if the wiring corresponds to the correct direction of rotation.
If the rotation of the motor must be changed:
●Switch any two of the motor phase wires.

7 | Commissioning
18 | 40 Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en
7 Commissioning
WARNING
FO 0035 B operates at 100 hPa (mbar) in continuous operation.
Risk of damage to the machine!
ATEX ► Risk of explosion and injuries!
●Make sure to comply with the maximum continuous suction pressure, see Technical Data [➔35].
CAUTION
During operation the surface of the machine may reach temperatures of more than 70°C.
Risk of burns!
●Avoid contact with the machine during and directly after operation.
NOTE
A small amount of tip seal dust may collect in the exhaust duct of the machine. The dust may
be blown out when the machine is vented.
●Make sure that the Installation Conditions [➔11] are met.
●Start the machine.
●Make sure that the maximum permissible number of starts does not exceed 6 starts per hour.
Those starts should be spread within the hour.
NOTE
For the single phase version, take into account a delay of 5 seconds between power-up and
the machine start up.
●Make sure that the operating conditions comply with the Technical Data [➔35].
As soon as the machine is operated under normal operating conditions:
●Measure the motor current and record it as reference for future maintenance and trouble-
shooting work.
7.1 Conveying Condensable Vapors
START
●Close the isolation valve* and open the gas ballast valve** (GB)
●Warm up the machine
●Wait 30 minutes
●Open the isolation valve* and perform the process
●Close the isolation valve*
●Wait 30 minutes
●Close the gas ballast valve** (GB)

Commissioning | 7
Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en 19 | 40
END
* Not included in the scope of delivery
** may be considered as optional on certain products
7.1.1 Gas Ballast Valve Adjustment
1
2
3
Description
1 8 mm hex key 2 Open
3 Close
NOTE
Risk of back-flow when the gas ballast is open.

8 | Maintenance
20 | 40 Instruction Manual FOSSA FO 0015 A - FO 0035 B_EN_en
8 Maintenance
DANGER
Live wires.
Risk of electrical shock.
●Electrical installation work must only be executed by qualified personnel.
WARNING
Machines contaminated with hazardous material.
Risk of poisoning!
Risk of infection!
If the machine is contaminated with hazardous material:
●Wear appropriate personal protective equipment.
WARNING
Version intended for oxygen application.
Risk of fire!
●Do not perform maintenance task before being informed about oxygen requirements.
●Ask your Busch representative for more information.
CAUTION
Hot surface.
Risk of burns!
●Prior to any action requiring touching the machine, let the machine cool down first.
●Shut down the machine and lock against inadvertent start up.
●Vent the connected lines to atmospheric pressure.
If necessary:
●Disconnect all connections.
8.1 Maintenance Schedule
The maintenance intervals depend very much on the individual operating conditions. The intervals
given below are considered as starting values which should be shortened or extended as appropri-
ate. Particularly harsh applications or heavy duty operation, such as high dust loads in the environ-
ment or in the process gas, other contamination or ingress of process material, can make it neces-
sary to shorten the maintenance intervals significantly.