Atlas Copco DSS User manual

DSS Scroll Pump
INSTRUCTION MANUAL
9824100080_A Original instructions

Copyright notice
Any unauthorized use or copying of the contents or any part thereof is
prohibited. This applies in particular to trademarks, model denominations, part
numbers and drawings. This instruction book is valid for CE as well as non-CE
labelled machines. It meets the requirements for instructions specified by the
applicable European directives as identified in the Declaration of Conformity.
Trademark credit
©2021 Atlas Copco AB, Stockholm, Sweden.
Associated publication
Publication title Publication number
Vacuum Pump and Vacuum Systems Safety Manual P40040100
DSS Tip seal replacement Instruction manual 9824100040
Disclaimer
The content of this manual may change from time to time without notice. We
accept no liability for any errors that may appear in this manual nor do we make
any expressed or implied warranties regarding the content. As far as practical
we have ensured that the products have been designed and constructed to be
safe and without risks when properly installed and used in accordance with their
operating instructions.
We accept no liability for loss of profit, loss of market or any other indirect or
consequential loss whatsoever.
Product warranty and limit of liability are dealt with in our standard terms and
conditions of sale or negotiated contract under which this document is supplied.
You must use this product as described in this manual. Read the manual before
you install, operate, or maintain the product.

Contents
1. Safety and compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1. Definition of Warnings and Cautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Safety symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1. Gas ballast system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2. Cooling system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3. Exhaust silencer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4. Safe area operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3. Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1. General technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2. Materials of construction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3. Lubrication system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4. Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1. Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2. Unpack and inspect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3. Locate the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.4. Electrical installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.4.1. Electrical setup of pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.5. Earth (Ground) connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.6. Check the direction of pump rotation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.7. Connect the pump inlet and pump outlet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.7.1. Connect the pump to the process system. . . . . . . . . . . . . . . . . . . . . . . . 20
5.7.2. Connect the pump outlet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.8. Leak test the installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.9. Commission the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6. Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1. Start the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1.1. Prestart checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1.2. Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2. Shut down the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7. Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1. Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2. Maintenance plan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2.1. Clean the external fan cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Page 39824100080_A

7.2.2. Inspect the system installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2.3. Clean the exhaust silencer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.2.4. Re-greasing the Orbit scroll bearings. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.2.5. Tip seal replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.3. Overhaul the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8. Fault finding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9. Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10. Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
11. Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
11.1. Return the equipment or components for service . . . . . . . . . . . . . . . . . . . . . 37
Page 49824100080_A

List of Figures
Figure 1: Pump connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 2: Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 3: Electrical setup of pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 4: Secondary Earth (ground). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 5: Gas ballast - closed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 6: Gas ballast - open. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 7: Remove/refit the exhaust silencer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 8: Re-greasing the OS bearing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Page 59824100080_A

1. Safety and compliance
1.1. Definition of Warnings and Cautions
NOTICE:
Obligation to Provide Information
Read and follow these instructions carefully before installing and commissioning
to ensure optimum and safe operation right from the start.
Safe and proper operation is guaranteed when used correctly and in
accordance with the instructions contained in these operating instructions.
Please read all safety instructions in this section and the rest of this manual
carefully and make sure that these instructions are followed. The device may be
operated and maintained only by trained personnel in the proper condition and
as described in the operating instructions. Also observe local and state
requirements and regulations. If you have any questions regarding safety,
operation or maintenance of the device, please contact our nearest subsidiary.
DANGER:
Danger indicates a hazard with a high level of risk which, if not avoided, will
result in death or serious injury.
WARNING:
Warning indicates a hazard with a medium level of risk which, if not avoided,
could result in death or serious injury.
CAUTION:
Caution indicates a hazard with a low level of risk which, if not avoided, could
result in minor or moderate injury.
NOTICE:
Information about properties or instructions for an action which, if ignored, will
cause damage to the pump or the system.
We reserve the right to change the design and the stated data. The illustrations
are not binding.
Keep the instructions for future use.
Safety and compliance
Page 69824100080_A

1.1.1. Safety symbols
The safety symbols on the products shows the areas where care and attention is
necessary.
The safety symbols that follow are used on the product or in the product
documentation.
Warning/Caution
An appropriate safety instruction must be followed or caution to a
potential hazard exists.
Warning - Heavy object
Identifies a possible hazard from a heavy object.
Warning - Dangerous voltage
Identifies possible hazards from dangerous voltages.
Warning - Hot surfaces
Identifies a potential hazard from a hot surface.
Warning - Do not step
Personnel must not step onto the marked area.
Warning - Protective earth (ground)
Earth point for electrical equipment.
WEEE symbol
The equipment must be discarded carefully. Obey local and na-
tional regulations for disposal of this equipment.
Warning - Use protective equipment
Use appropriate protective equipment for the task.
Page 79824100080_A
Safety and compliance

2. Description
The DSS pump are rugged, reliable dry vacuum pumps designed for general
vacuum use. The pumps are suitable for a wide range of industrial applications.
The pump is a directly driven scroll pump and uses a standard industrial 3‑phase
motor.
The motor shaft protrudes out of the scroll stator (i.e. fixed scroll) and has the
scroll rotor (i.e. orbiting scroll) attached on one side. A cooling fan is attached to
the other end of the motor shaft. The patented scroll mechanism is a three‑stage
compression design with:
▪two parallel inlet turns in the first stage
▪a single turn in the second stage
▪a single turn but with half of the scroll height in the third stage.
To limit the compression at higher inlet pressures by the pump, there are two
blow off valves in between the stages.
The pumps have rubber isolation mounts to secure the pump in its operating
position. Refer to Figure: Dimensions.
2.1. Gas ballast system
The pump has a gas ballast system to pump high vapour loads. The gas ballast
is supplied into the pump to prevent condensation of the vapour carried by the
pumped gases. Gas ballast is manually operated. Refer to Pre
‑ start checks on
page 23.
2.2. Cooling system
The pump is air cooled. The pump is designed to keep the motor and bearing at
a temperature lower than the process fluid and reduce the maintenance cost.
The motor cooling fan cools the motor.
2.3. Exhaust silencer
The exhaust silencer shown in Figure: Pump connections is an acoustic
attenuator designed to reduce exhaust noise caused by air pulsation from the
pump scroll mechanism. The silencer consists of two expansion chambers
connected by a choke tube with defined length and volume.
The exhaust silencer is manufactured from aluminium alloy and is designed for
50 Hz pump frequency.
The inlet connection is made through a Push-in system, i.e. adapter diameter 43
female – G1¼" male. The outlet connection is made through 1-1/4" BSP Female
port. A drain port (2 off) fitted with a ¼ inch BSP plugs is provided to drain the
silencer.
Description
Page 89824100080_A

Figure 1 Pump connections
1. Exhaust silencer 2. Pump inlet 1 1/4" BSP
3. Pump outlet 1 1/4" BSP 4. Blow off valve seats
5. Secondary earthing points 6. AV foot mount
7. Pressure measurement points 8. Lifting points
9. Gas ballast
1. Exhaust silencer 2. Pump inlet 1 1/4" BSP
3. Pump outlet 1 1/4" BSP 4. Blow off valve seats
5. Secondary earthing points 6. AV foot mount
7. Pressure measurement points 8. Lifting points
9. Gas ballast
2.4. Safe area operation
The pump is not suitable for hazardous gases. The pump must only be used for
non‑hazardous applications.
Page 99824100080_A
Description

3. Technical data
3.1. General technical data
Table 1 General technical data
Parameter Data
Dimensions Refer to Figure: Dimensions
Weight (excluding packaging) Approximately 60 kg, 132.28 lb
Maximum shaft speed Approximately 3000 rev.min-1
Protection grade IP54*
Pump inlet connection BSP 1¼” female
Pump outlet connection BSP 1¼” female
Ambient operating temperature range 0 to 46 °C, 32 to 115 °F
Maximum ambient operating humidity 90% RH
Minimum air inlet temperature 10 °C, 50 °F
Maximum air inlet temperature 46 °C, 115 °F
Maximum outlet pressure 1200 mbar(a), 900 torr
*If the fan cowl is removed, internal components have lower IP ratings. Operation
without fan cowl is not recommended.
Technical data
Page 109824100080_A

Figure 2 Dimensions
Dimension Values Dimension Values Dimension Values
mm inches mm inches mm inches
A 130 5.12 J 40 1.57 U 38 1.5
A1 90 3.54 K 112.7 4.44 V 117.5 4.63
B 351 13.82 L 250 9.84 W 235 9.25
B1 325 12.8 M 101 3.98 X 488 19.2
C 203 7.99 N 446 17.56 Y 445.4 17.54
D 80 3.15 O 259.5 10.22 Z 121 4.76
E 63 2.5 P 31.8 1.25 Z1 40 1.57
F 137.7 5.42 Q 435.5 17.15 Z2 11.5 0.45
G 86 3.38 R 85.5 3.37 Z3 60 2.36
H 342.2 13.47 S 132.5 5.22
I 311.7 12.27 T 126.3 4.97
Page 119824100080_A
Technical data

3.2. Materials of construction
Table 2 Materials of construction
Component Material
Fixed scroll
Orbit scroll
Inlet
Outlet
Front cover
Silencer curved casting
Silencer with tube casting
OS cover
Cast aluminium
Inlet valve PBT 30% glass filled
Anti‑rotation device Nylon 30% glass filled
Cowl
Cowling end Injection moulded ‑ Polypropylene
Shaft
Exhaust silencer bracket Steel
BOV valve stems
Circular choke tube Stainless steel
Tip seals PTFE
Other seals Fluoroelastomer, Nitrile
Inlet filter Felt frame glued in with synthetic.
Secondary steel frame
Table 3 General electrical data
Voltage
[V]
Voltage tolerance
[%]
Frequency
[Hz]
Frequency
tolerance [%]
Approval
200 ±10 50 - 5 / + 3 IEC
230 ±10 50 - 5 / + 3 IEC
400 ±10 50 - 5 / + 3 IEC
500 ±10 50 - 5 / + 3 IEC
Description Part number Voltage range grouping
DSS65
8090371503 230VD / 400VY
8090371504 200VD / 345VY
8090371505 500VY
Description Rating
Frequency 50 Hz
Wiring configuration 3‑wire plus Earth (ground)
Voltage tolerance range +/- 10%
Installation category II (IEC 60664‑1)
Efficiency class IE3 (Premium efficiency) to EN 60034‑30
Technical data
Page 129824100080_A

Table 4 Electrical supplies
Parameter Data
Pump‑electrical motor rating 1.5 kW/2 HP
Fuse rating 3-phase, Type C
Maximum load current
▪200 VD 50 Hz 7.3 A
▪230 VD 50 Hz 6.3 A
▪345 VY 50 Hz 4.2 A
▪400 VY 50 Hz 3.6 A
▪500 VY 50 Hz 2.9 A
Typical continuous A‑weighted sound
pressure level at 50 Hz*
<75 dB(A) ducted exhaust (with ex-
haust silencer)
Maximum pumping speed 65 m3h-1
Ultimate pressure (Gas ballast closed) 1.5 ± 0.5 mbar
Ultimate pressure (Gas ballast open) 2.5 ± 0.5 mbar
*The noise level was measured in accordance with ISO2151 and with the pump
running at ultimate pressure. Running the pump at higher inlet pressures will
increase the noise level. Use appropriate ear protection.
Note:
We recommend you to fit a Residual current device (RCD 35/003/4) in the supply
circuit.
3.3. Lubrication system
Note:
Material Safety Data Sheets for the recommended grease given in the sections
below are available on request.
High vacuum bearings
Table 5 Bearing lubrication data
Parameter Item number
Required grease 2236232060
Page 139824100080_A
Technical data

4. Storage
Store the pump as follows:
1. Make sure that the pump is shut down as given in Shut down the pump on
page 24, and disconnect the pump from the electrical supply.
2. Disconnect the pump inlet and outlet from your process and exhaust
pipelines.
3. Attach blanking plates to the pump inlet and pump outlet.
4. Place protective covers over the pump service connection points.
5. Store the pump in a clean dry condition until required.
6. When required for use, prepare and install the pump as given in Installation
on page 15.

5. Installation
5.1. Safety
WARNING: INSTALLATION SAFETY
Risk of injury to people and damage to equipment. Obey the safety instructions
given below and take note of appropriate precautions.
There must be sufficient lighting for the personnel to read all the relevant safety
labels on the system.
Potential hazards on the dry pumps include electricity, hot surfaces, process
chemicals.
Detailed safety information is given in our Safety Manual for Vacuum Pumps and
Vacuum Systems. This publication is available on request.
▪A suitably trained and supervised technician must install the pump. We can
train the users to conduct the tasks described in this manual, contact us or the
local service centre for more information.
▪Do not remove the temporary cover or blanking plate from the dry pump inlet
and exhaust until prepared to connect the dry pump to the vacuum or exhaust
extraction system. Do not operate the pump unless the inlet and exhaust are
connected to the vacuum and exhaust extraction system.
▪Make sure that the installation technician knows the safety procedures related
to the products pumped. Wear the appropriate safety clothing when you do
work related to contaminated components.
▪Make sure that all the required components of the correct type are available
before you start.
▪Disconnect the components in the process system from the electrical supply
to prevent accidental operation.
▪The electrical supply is a potentially hazardous energy source. Lockout and
tagout any supply source before you do maintenance.
▪Obey all national and local rules and safety regulations when you install the
dry pump.
▪Route and secure cables, hoses and pipework during installation to avoid
possible risk of trips.
▪Make sure that the installation area is clean and free from debris and
contamination, such as oil, before you locate the pump.
5.2. Unpack and inspect
WARNING: HEAVY OBJECT
Risk of physical injury. Use suitable lifting equipment.
The pump is supplied on a wooden pallet covered with a cardboard and requires
equipment to lift the pump.
Page 159824100080_A
Installation

1. Use a forklift truck or a pallet truck to place the pallet in a convenient position.
2. Remove the packing materials. It is recommended that you retain all packing
materials for use if the pump is to be returned for service.
3. If the pump is damaged, notify the supplier and the carrier in writing within
three days; state the item number of the pump together with the order number
and the supplier's invoice number. Retain all packing materials for inspection.
Do not use the pump if it is damaged.
4. If the pump is not to be used immediately, store in suitable conditions as given
in Storage on page 14.
5.3. Locate the pump
WARNING: HEAVY OBJECT
Risk of physical injury. Use suitable lifting equipment. Do not push/pull the
pump. Do not stand on or place any heavy objects on any part of the pump.
Refer to the installation drawing for information about centre of gravity.
To lift the pump, each pump has a lifting eye. Make sure that the lifting eye is
used when you lift the pump.
1. Remove all the bolts which secure the pump to the pallet.
2. Attach suitable lifting equipment to the lifting eye to move the pump.
3. Locate the pump on a firm, level surface. Make sure that the surface is clean
and free from debris and contamination (such as oil).
4. The pump can be installed and bolted down directly to the floor or installed on
a stable support frame. To secure the pump in position, install the four
M8 bolts to the fixing‑holes in the mounting feet (if required).
5. Make sure that the location of the pump and the intended routing of
connecting parts i.e. process line, exhaust line and power cables do not have
any physical hazards, for example, trip hazards.
5.4. Electrical installation
WARNING: HAZARDOUS VOLTAGE
Risk of electric shock. You must provide suitable strain relief on the electrical
supply cable. If you do not, the cable (or wires in the cable) may become
disconnected from the pump motor and there may be a risk of injury or death by
electric shock.
Installation
Page 169824100080_A

WARNING: HAZARDOUS VOLTAGE
The pump must be electrically installed in accordance with regional and local
codes, conforming to local and national safety requirements. The pump must be
connected to a suitably fused and protected electrical supply and a suitable
Earth (ground) point.
Isolate the electrical supply before you disconnect the electrical supply cable
from the dry pump. The power wiring to the pump must be properly protected.
You must know that the pump will restart automatically when the electrical
supply is restored after an electrical supply failure. To prevent the automatic
restart of the pump motor connect the pump to the electrical supply through
suitable control equipment which must be reset manually after an electrical
supply failure.
If the pump is to be used on the floor of a work area, position the power lead,
exhaust and inlet hoses with care. Make sure that the personnel in the area
knows all the obstructions around the pump. Be careful, that the power cable is
permanently connected to the pump.
CAUTION: DAMAGE TO MOTOR
Risk of minor injury and damage to equipment. Make sure that the motor is
configured correctly for your electrical supply. If you operate the pump when the
motor is not configured correctly for the electrical supply, you will damage the
motor.
Make sure that the access of the power cable to the pump is not obstructed
when you locate the pump.
Connect the electrical supply to the pump through a suitable circuit breaker with
appropriate type C fuses. A circuit breaker must have thermal over-current
protection. Adjust the over-current protection to suite your installation. The full-
load current ratings are shown in Table: Electrical supplies. Make sure that the
fuse is suitable for the starting currents of your installation (Fuse type C).
The DSS pump will start automatically when the electrical supply is turned on. If
you do not want the pump to automatically restart, connect the electrical supply
to the pump motor through a control equipment which must be manually reset
after an electrical supply interruption.
Refer to Earth (Ground) connection on page 19 where the Earth (ground) point is
located. Using the Earth (ground) point is mandatory.
The only electrical connections necessary is that of the customer supply cable
and the mandatory earth connection shown in Figure: Electrical setup of pump.
5.4.1. Electrical setup of pump
Refer to Figure: Electrical setup of pump.
For Low voltage - Triangle connection (200 V - 230 V)
▪U1 + W2 - Connected together into L1
▪V1 + U2 - Connected together into L3
Page 179824100080_A
Installation

▪W1 + V2 - Connected together into L2
For High voltage - Star connection (345 V - 500 V)
▪U1 - Connect into L1
▪V1 - Connect into L3
▪W1 - Connect into L2
▪U2 + V2 + W2 - Connected together and insulated
Change L2 with L3 for counter direction of rotation.
Figure 3 Electrical setup of pump
1. U1 2. W2
3. V1 4. U2
5. W1 6. V2
7. Earth
1. U1 2. W2
3. V1 4. U2
5. W1 6. V2
7. Earth
▪All bootlaces are of 1.5 x 8 mm
▪Power supply cable length is approximately 1.5 m
Motor type Voltage Tolerance Phase Connection Frequency
1230 V ±10% 3 Δ 50 Hz
400 V ±10% 3 Y 50 Hz
2200 V ±10% 3 Δ 50 Hz
345 V ±10% 3 Y 50 Hz
3 500 V ±10% 3 Y 50 Hz
Voltage range grouping for 50 Hz
▪230VD / 400VY
▪200VD / 345VY
Installation
Page 189824100080_A

▪500VY
5.5. Earth (Ground) connection
It is mandatory that the pump is connected to a suitable factory/plant Earth
(ground) and a secondary earth grounding using the same location as shown in
Figure: Secondary Earth (ground).
Note:
The exhaust /inlet tubes are not suitable earthing points.
Figure 4 Secondary Earth (ground)
1. Mandatory secondary earth1. Mandatory secondary earth
5.6. Check the direction of pump rotation
WARNING: PRESSURISED PIPING
Risk of injury or damage to equipment. Make sure that the direction of rotation
of the pump is correct before you operate the pump. If you do not, and the pump
direction of rotation is incorrect, the inlet pipeline will be pressurised and may be
damaged and there will be a risk of injury to people or explosion or fire.
Note:
If you cannot easily see the cooling fan to determine its direction of rotation, see
the blanking plate on the pump inlet. If the blanking plate lifts from the inlet when
you switch on the pump, the direction of rotation is incorrect.
1. Remove the blanking cap from the pump inlet, then remove the blanking cap
from the pump outlet.
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Installation

2. Watch the cooling fan through a grid in the cooling air inlet, switch on the
pump for one or two seconds, then switch the pump off.
3. If the cooling fan does not rotate in the correct direction shown by the arrow
on the cover:
A. Isolate the pump from the electrical supply.
B. Reverse the wire marked L2 with the wire marked L3 to change the
direction of pump rotation. Refer to Figure: Electrical setup of pump.
C. Repeat Step 2 to make sure that the direction of rotation is now correct.
5.7. Connect the pump inlet and pump outlet
WARNING: HAZARDOUS GASES
Risk of injury or death. Take all necessary safety precautions when you pump
toxic gases. If you do not, there will be a danger of injury or death to people.
Risk of inhalation injury. Make sure that your system can provide sufficient gas
ballast and/or inlet purge to dilute toxic gases to safe limits. If you do not, there
will be a risk of emission of hazardous gases.
WARNING: HIGH PRESSURE IN PIPELINE
Risk of injury or damage to equipment. When the pump is switched off, gas will
flow in reverse direction through the pump and there will be a rapid pressure
rise in the inlet pipeline and your process system. Take sufficient protection
(such as a fast‑acting inlet isolation valve or an outlet check valve) to protect
adjacent devices.
CAUTION: GASEOUS FUMES
Risk of minor injury or damage to equipment. At high temperature (if more than
250 °C) the tip seal wear product will begin to decompose, giving rise to
gaseous fumes that can produce unpleasant symptoms.
5.7.1. Connect the pump to the process system
When you connect the pump to the process system:
▪Support process pipelines to stop the transmission of stress to pipeline joints.
▪Use a flexible connection in the pipeline (from the process system to the
pump) to reduce vibration and stress in the system pipelines.
▪You must be able to isolate the pump from the atmosphere and from your
process system if you have pumped or produced dangerous chemicals.
▪On very dusty applications, include an inlet filter in the inlet pipeline to
minimise the entry of dust into the pump.
▪To get the best pumping speed, make sure that the pipeline which connects
the process system to the pump is as short as possible and has an internal
diameter not less than the pump inlet.
▪Do not allow debris (such as weld slag) to get into the pump during operation.
Installation
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