ProMinent Sigma/3 Basic S3Ba Series Operating Instructions Manual

Diaphragm Motor-Driven Metering Pump

Sigma X Control type — Sigma/ 3 - S3Cb

Operating instructions

EN

Original operating instructions (2006/42/EC)Part no. 982514 BA SI 080 07/18 EN

Please carefully read these operating instructions before use. · Do not discard.

The operator shall be liable for any damage caused by installation or operating errors.

The latest version of the operating instructions are available on our homepage.

Read the following supplementary information in its entirety! Should you

already know this information, you will benefit more from referring to the

operating instructions.

The following are highlighted separately in the document:

n Enumerated lists

Handling instructions

ð

Outcome of the operation guidelines

- see (reference)

Information

This provides important information relating to the cor‐

rect operation of the device or is intended to make your

work easier.

Safety notes

Safety notes are identified by pictograms - see Safety Chapter.

At the time of going to press, these operating instructions conformed to the

current EU regulations.

Please state identity code and serial number, which you can find on the

nameplate when you contact us or order spare parts. This enables the

device type and material versions to be clearly identified.

Supplementary information

Fig. 1: Please read!

Validity

State the identity code and serial number

Supplemental directives

2

Table of contents

1

Identity code.................................................................................... 5

2 Safety Chapter................................................................................. 8

3 Storage, Transport and Unpacking................................................ 12

4 Overview of equipment and control elements............................... 13

4.1 Control elements................................................................... 15

4.2 Key functions......................................................................... 17

5 Functional description.................................................................... 18

5.1 Pump..................................................................................... 18

5.2 Liquid end.............................................................................. 19

5.3 Bleed valve and integrated relief valve ................................ 19

5.4 Multi-layer safety diaphragm................................................. 20

5.5 Operating modes................................................................... 20

5.6 Functions............................................................................... 21

5.7 Options.................................................................................. 22

5.8 Function and fault indicator................................................... 22

5.8.1 LCD screen........................................................................ 22

5.8.2 LED displays...................................................................... 23

5.9 Hierarchy of operating modes, functions and fault sta‐

tuses......................................................................................

23

6 Assembly....................................................................................... 24

7 Installation..................................................................................... 26

7.1 Installation, hydraulic............................................................. 26

7.1.1 Basic installation notes....................................................... 30

7.2 Installation, electrical............................................................. 31

7.2.1 Control connectors............................................................. 32

7.2.2 HMI operating unit.............................................................. 39

7.2.3 Pump, power supply........................................................... 40

7.2.4 Other units.......................................................................... 41

8 Basic set-up principles................................................................... 42

8.1 Basic principles for setting up the control.............................. 42

8.2 Checking adjustable variables.............................................. 44

8.3 Changing to Setting mode..................................................... 44

9 Set up /

‘Menu’

.............................................................................. 45

9.1

‘Information’

......................................................................... 45

9.2

‘Operating mode’

.................................................................. 45

9.3

‘Settings’

.............................................................................. 45

9.3.1

‘Operating mode’

............................................................... 46

9.3.2

‘Metering’

.......................................................................... 50

9.3.3

‘Calibration’

....................................................................... 51

9.3.4

‘Inputs/outputs’

.................................................................. 53

9.3.5

‘System’

............................................................................ 55

9.3.6

‘Set time’

........................................................................... 56

9.3.7

‘Date’

................................................................................. 56

9.4

‘Timer’

.................................................................................. 56

9.4.1 Timer

‘activation’

............................................................... 56

9.4.2

‘Setting the timer’

.............................................................. 56

9.4.3

‘Clear all’

........................................................................... 58

9.4.4 Example............................................................................. 59

9.5

‘Service’

............................................................................... 59

9.5.1

‘Password’

......................................................................... 59

9.5.2

‘Clear counter’

................................................................... 59

9.5.3

‘Log book’

.......................................................................... 60

Table of contents

3

9.5.4

‘Display’

............................................................................. 60

9.5.5

‘HMI logout’

....................................................................... 60

9.5.6

‘Diaphragm part number: XXXXXXX’

................................ 60

9.5.7

‘Spare parts kit part number: XXXXXXX’

.......................... 61

9.6

‘Language’

........................................................................... 61

10 Start up.......................................................................................... 62

11

Operation....................................................................................... 66

11.1 Manual operation................................................................ 66

12 Maintenance.................................................................................. 68

13 Carrying out repairs....................................................................... 71

13.1 Cleaning valves................................................................... 71

13.2 Replacing the diaphragm.................................................... 73

14 Troubleshooting............................................................................. 77

14.1 Faults without a fault message............................................ 77

14.2 Fault messages................................................................... 78

14.3 Warning messages............................................................. 79

14.4 All other faults..................................................................... 80

14.5 Log book............................................................................. 80

14.5.1 Warning messages in the log book.................................. 80

14.5.2 Fault messages in the log book....................................... 81

14.5.3 Events in the log book...................................................... 82

15 Decommissioning.......................................................................... 83

16 Technical data............................................................................... 86

16.1 Performance data................................................................ 86

16.2 Viscosity.............................................................................. 87

16.3 Shipping weight................................................................... 87

16.4 Wetted materials................................................................. 87

16.5 Ambient conditions.............................................................. 88

16.5.1 Ambient temperatures...................................................... 88

16.5.2 Media temperatures......................................................... 88

16.5.3 Air humidity...................................................................... 88

16.5.4 Degree of Protection and Safety Requirements............... 89

16.6 Installation height................................................................ 89

16.7 Electrical connection........................................................... 89

16.8 Diaphragm rupture sensor.................................................. 90

16.9 Relay................................................................................... 90

16.10 Gear oil.............................................................................. 91

16.11 Sound pressure level........................................................ 91

17 Dimensional drawings................................................................... 92

18

Motor data sheets.......................................................................... 95

19 Liquid ends for Sigma/ 3................................................................ 96

20 Wear parts for S3Cb.................................................................... 106

20.1 Standard............................................................................ 106

20.2 Physiological safety........................................................... 106

21 Diagrams for adjusting the capacity............................................ 108

22

Declaration of Conformity for Machinery..................................... 109

23 Operating/Set-up overview of the Sigma X Control type............. 110

24 Operating menu of Sigma X Control type, complete................... 111

25 Continuous displays and secondary displays.............................. 115

26 Index............................................................................................ 117

Table of contents

4

1 Identity code

Sigma X Control type - Sigma/ 3 - S3Cb

Product range

S3Cb

Power end type

H Main power end, diaphragm

Type Capacity

_ _ _ _ _

_

Performance data at maximum back pressure and type: refer to nameplate on the pump

housing

Dosing head material

PP Polypropylene

PC PVC

PV PVDF

SS Stainless steel

Seal material

T PTFE

Displacement body

S Multi-layer safety diaphragm with optical rupture indicator

A Multi-layer safety diaphragm with rupture signalling by electrical signal

H Diaphragm for hygienic pump head

Dosing head design

0 without bleed valve, without valve springs

1 without bleed valve, with valve springs

2 with bleed valve, FPM, without valve springs ***

3 with bleed valve, FPM, with valve springs ***

4 with relief valve, FPM, without valve springs ***

5 with relief valve, FPM, with valve springs ***

6 with relief valve, EPDM, without valve springs ***

7 with relief valve, EPDM, with valve springs ***

8 with bleed valve, EPDM, without valve springs ***

9 with bleed valve, EPDM, with valve springs ***

H Hygienic pump head with tri-clamp connectors (max. 10 bar)

Hydraulic connector

0 Standard threaded connector (in line with technical data)

1 Union nut and PVC insert

2 Union nut and PP insert

3 Union nut and PVDF insert

4 Union nut and SS insert

7 Union nut and PVDF hose nozzle

8 Union nut and SS hose nozzle

9 Union nut and SS welding sleeve

Identity code

5

Sigma X Control type - Sigma/ 3 - S3Cb

Design

0

with ProMinent

®

logo

1

without ProMinent

®

logo

N Seal according to NEMA 4x

Electric power supply

U 1-phase, 100-240 V, 50/60 Hz

Cable and plug

A 2 m European

B 2 m Swiss

C 2 m Australian

D 2 m USA

Relay

0 no relay

1 Fault indicating relay (230V - 8A)

3 Fault indicating relay + pacing relay (24V

- 100mA)

8 0/4-20 mA analogue output + fault indi‐

cating / pacing relay (24V - 100mA)

Control version

0 Manual + external contact with

PulseControl + timer

1 Manual + external contact with

PulseControl + analogue +

metering profiles

2 Manual + controller + PulseControl

+ analogue + dosing profile +

extreme profile

5 as 1 + timer

6

as 1 + PROFIBUS

®

DP interface

(M12 plug)

7 as 1 + CANopen (M12 plug) **

Overload shut-down

0 without overload shut-down

Operating unit (HMI)

0 HMI (0.5 m cable)

4 HMI + 2 m cable

5 HMI + 5 m cable

6 HMI + 10 m cable

X without HMI

Safety options

0 Metering monitor,

dynamic, without

access control

Identity code

6

Sigma X Control type - Sigma/ 3 - S3Cb

1 Metering monitor,

dynamic, with

access control

B HMI with Blue‐

tooth

W HMI with Wi-Fi

Language

DE German

EN English

ES Spanish

FR French

FPM = fluorine rubber

** Pump without HMI control unit

*** Standard with tube nozzle in the bypass. Threaded connection on

request.

Identity code

7

2 Safety Chapter

The following signal words are used in these operating instructions to

denote different severities of danger:

Signal word Meaning

WARNING Denotes a possibly dangerous sit‐

uation. If this is disregarded, you

are in a life-threatening situation

and this can result in serious inju‐

ries.

CAUTION Denotes a possibly dangerous sit‐

uation. If this is disregarded, it

could result in slight or minor inju‐

ries or material damage.

The following warning signs are used in these operating instructions to

denote different types of danger:

Warning signs Type of danger

Warning – high-voltage.

Warning – danger zone.

n Only use the pump to meter liquid feed chemicals.

n Only use the pump after it has been correctly installed and started up

in accordance with the technical data and specifications contained in

the operating instructions.

n Only pumps with the identity code option "Multi-layer safety diaphragm

with rupture signalling by electrical signal" are approved for use with

flammable feed chemicals, at back pressures of over 2 bar, software

setting

‘Diaphragm rupture’

-

‘Error’

and if the operator takes appro‐

priate safety measures.

n Only pumps with the design "F - Physiological safety with regard to

wetted materials" are approved for use with physiologically harmless

applications.

n Only “H - Hygienic head” design pumps may be used for applications

in accordance with the hygienic requirements of the EHEDG

(www.ededg.org).

n Observe the general limitations with regard to viscosity limits, chem‐

ical resistance and density - see also the ProMinent Resistance List

(in the Product Catalogue or at www.prominent.com)!

n All other uses or modifications are prohibited.

n The pump is not intended for the metering of gaseous media and

solids.

n The pump is not intended for operation in areas at risk from explosion.

n The pump is not intended for unprotected outside use.

n The pump is only intended for industrial use.

n The pump should only be operated by trained and authorised per‐

sonnel, see the following "Qualifications" table.

n You have a responsibility to adhere to the information contained in the

operating instructions at the different phases of the unit's service life.

Identification of safety notes

Warning signs denoting different types of

danger

Intended use

Safety Chapter

8

Task Qualification

Storage, transport, unpacking Instructed person

Assembly Technical personnel, Service

Planning the hydraulic installation Qualified personnel who have a

thorough knowledge of oscillating

diaphragm pumps.

Hydraulic installation Technical personnel, Service

Electrical Installation Electrical technician

Operation Instructed person

Maintenance, repair Technical personnel, Service

Decommissioning, disposal Technical personnel, Service

Troubleshooting Technical personnel, electrical

technician, instructed person,

service

Explanation of the table:

Technical personnel

A qualified employee is deemed to be a person who is able to assess the

tasks assigned to him and recognise possible dangers based on his tech‐

nical training, knowledge and experience, as well as knowledge of perti‐

nent regulations.

Note:

A qualification of equal validity to a technical qualification can also be

gained by several years of employment in the relevant field of work.

Electrical technician

An electrical technician is able to complete work on electrical systems and

recognise and avoid possible dangers independently based on his tech‐

nical training and experience as well as knowledge of pertinent standards

and regulations.

The electrical technician must be specifically trained for the working envi‐

ronment in which he is employed and be conversant with the relevant

standards and regulations.

The electrical technician must comply with the provisions of the applicable

statutory directives on accident prevention.

Instructed person

An instructed person is deemed to be a person who has been instructed

and, if required, trained in the tasks assigned to him and any possible dan‐

gers that could result from improper behaviour, as well as having been

instructed in the required protective equipment and protective measures.

Service

Customer Service department refers to service technicians, who have

received proven training and have been authorised by ProMinent or Pro‐

Maqua to work on the system.

Qualification of personnel

Safety Chapter

9

WARNING!

Warning of hazardous feed chemical

Should a dangerous feed chemical be used: it may

escape from the hydraulic components when working on

the pump, material failure or incorrect handling of the

pump.

– Take appropriate protective measures before

working on the pump (e.g. safety glasses, safety

gloves, ...). Adhere to the material safety data sheet

for the feed chemical.

–

Drain and flush the liquid end before working on the

pump.

WARNING!

Danger from hazardous substances!

Possible consequence: Fatal or very serious injuries.

Please ensure when handling hazardous substances

that you have read the latest safety data sheets provided

by the manufacture of the hazardous substance. The

actions required are described in the safety data sheet.

Check the safety data sheet regularly and replace, if

necessary, as the hazard potential of a substance can

be re-evaluated at any time based on new findings.

The system operator is responsible for ensuring that

these safety data sheets are available and that they are

kept up to date, as well as for producing an associated

hazard assessment for the workstations affected.

CAUTION!

Warning of feed chemical spraying around

Feed chemical can spray out of the hydraulic compo‐

nents if they are manipulated or opened due to pressure

in the liquid end and adjacent parts of the system.

– Disconnect the pump from the mains power supply

and ensure that it cannot be switched on again by

unauthorised persons.

–

Depressurise the system before commencing any

work on hydraulic parts.

CAUTION!

Warning of feed chemical spraying around

An unsuitable feed chemical can damage the parts of

the pump that come into contact with the chemical.

– Take into account the resistance of the wetted mate‐

rials and the ProMinent Resistance List when

selecting the feed chemical - see the ProMinent

Product Catalogue or visit ProMinent.

CAUTION!

Danger of personnel injury and material damage

The use of untested third party parts can result in per‐

sonnel injuries and material damage.

– Only fit parts to metering pumps, which have been

tested and recommended by ProMinent.

Safety information

Safety Chapter

10

CAUTION!

Danger from incorrectly operated or inadequately main‐

tained pumps

Danger can arise from a poorly accessible pump due to

incorrect operation and poor maintenance.

– Ensure that the pump is accessible at all times.

–

Adhere to the maintenance intervals.

WARNING!

An on/off switch may not be fitted on the pump,

dependent on the identity code and installation.

Warning labels

This warning sign is affixed to the motor:

Ensure that the warning sign is always fitted and clearly visible.

All isolating protective equipment must be installed for operation:

n Drive front cover

n Motor fan cowling

n Motor terminal box cover

n Hood

In exactly the same way, plug all relays, modules and options into the

hood - if available.

Only remove them when the operating instructions request you to do so.

In the event of an electrical accident, disconnect the mains cable from the

mains or press the emergency cut-off switch fitted on the side of the

system!

If feed chemical escapes, also depressurise the hydraulic system around

the pump as necessary. Adhere to the safety data sheet for the feed

chemical.

Sound pressure level LpA < 70 dB according to EN ISO 20361

at maximum stroke length, maximum stroke rate, maximum back pressure

(water)

Safety equipment

Fig. 2: Hot surface

Isolating protective equipment

Information in the event of an emergency

Sound pressure level

Safety Chapter

11

3 Storage, Transport and Unpacking

WARNING!

Only return the metering pump for repair in a cleaned

state and with a flushed liquid end - refer to the chapter

"Decommissioning"!

Only return metering pumps with a completed Decon‐

tamination Declaration form. The Decontamination Dec‐

laration constitutes an integral part of an inspection /

repair order. A unit can only be inspected or repaired

when a Declaration of Decontamination Form is sub‐

mitted that has been completed correctly and in full by

an authorised and qualified person on behalf of the

pump operator.

The "Decontamination Declaration Form" can be found

at www.prominent.com.

WARNING!

Slings can tear

ProMinent only supplies “non-reusable slings” in accord‐

ance with DIN EN 60005. They can tear with repeated

use.

– Destroy and remove the slings as soon as the pump

has been lifted into its final position.

CAUTION!

Danger of material damage

The device can be damaged by incorrect or improper

storage or transportation!

– The unit should only be stored or transported in a

well packaged state - preferably in its original pack‐

aging.

–

Only transport the unit when the red gear bleeding

plug is pushed in.

– The packaged unit should also only be stored or

transported in accordance with the stipulated

storage conditions.

– The packaged unit should be protected from mois‐

ture and the ingress of chemicals.

Compare the delivery note with the scope of supply:

Personnel:

n

Technical personnel

1. Plug the caps on the valves.

2. Check if the red gear bleeding plug is pushed in.

3. Preferably place the pump standing vertically on a pallet and secure

against falling over.

4. Cover the pump with a tarpaulin cover - allowing rear ventilation.

Store the pump in a dry, sealed place under the ambient conditions

according to chapter "Technical Data".

Safety information

Scope of delivery

Storage

Storage, Transport and Unpacking

12

4 Overview of equipment and control elements

P_SI_0191_SW

1

2

5

6

7

3

4

Fig. 3: Overview of Sigma X - S3Cb equipment

1 HMI control unit

2 Frequency converter

3 Drive unit

4 Stroke length adjustment wheel

5 Drive motor

6 Liquid end

7 Diaphragm rupture sensor

1

2

P_SI_0088_SW_2

Fig. 4: Sigma control elements

1 Bleed valve (optional)

2 Diaphragm rupture sensor (visual)

Overview of equipment

Control elements

Overview of equipment and control elements

13

P_SI_0180_SW

3

1

5

4

2

10

9

8

6

7

Fig. 5: Control elements for HMI Sigma X Control type

1 LCD screen

2

[Menu]

key

3

Clickwheel

4

[Priming]

key

5

[STOP/START]

key

6

[Back]

key

7 "Bluetooth active” display (blue)

8 Fault indicator (red)

9 Warning indicator (yellow)

10 Operating indicator (green)

P_SI_0193_SW

6

7

543

2

1

8

Fig. 6: Connector cover control elements

1 Relay and mA-output (option)

2

Slot for optional module (PROFIBUS

®

, ...)

3 "Diaphragm rupture" socket

4 "External control" terminal

5 "Metering monitor" terminal

Overview of equipment and control elements

14

6 "Level switch" terminal

7 "CAN bus" socket (external)

8 LEDs (as Fig. 5) and CAN bus status LED (external)

not shown Stroke length adjustment wheel

4.1 Control elements

Use this overview to familiarise yourself with the keys

and the other control elements on the pump!

12012

12000

CONTACT

memory

l/h

CAN

open

hh

B1087

1

3

2

Fig. 7: Construction of continuous display

1 Status bar

2 Continuous display, central area

3 Secondary display

Refer to the chapter entitled "Main displays and secondary displays" in the

Appendix for the different main displays and secondary displays.

The LCD screen supports the operation and adjustment of the pump by

providing different information and identifiers:

120120

12000

Dosing monitor!

CONTACT

memory

l/h

CAN

open

hh

12000

ANALOGUE

hh

Input signal < 4 mAInput signal < 4 mA

i < 4 mAi < 4 mA

B1088

a)

b)

i < 4 mA!

Fig. 8: a) Continuous display with warning message; b) Continuous display

with fault message. Explanation of the symbols in the following tables.

The above Figure, Part a) shows that:

n The pump is in operation

n Is in

‘Contact’

operating mode with "memory" stroke memory

n A metering monitor is connected

n A log entry has been made

n A warning message for the

‘metering monitor’

is pending

n The capacity of 12.0 l/h has been set

n The stroke rate is 12,000 strokes / h

Pressure display, identifier and fault dis‐

plays on the LCD screen

Overview of equipment and control elements

15

Tab. 1: Identifier and error displays:

Identifier Meaning

The pump is working or waiting for a starting signal.

The pump was manually stopped using the

[STOP/START]

key.

The pump was remotely stopped (Pause) - via the "External" socket.

The pump was stopped by an error.

Only with cyclical batch metering: the pump is waiting for the next cycle.

‘memory’

Only in

‘CONTACT’

and

‘BATCH’

operating modes:

The "Stroke memory" auxiliary function has been set.

The pump is in

‘ANALOGUE’

operating mode.

The

‘Curve

è

linear’

type of processing is set.

The pump is in

‘ANALOGUE’

operating mode.

The

‘Curve

è

Upper side band’

type of processing is set.

‘AUX’

The pump is currently pumping at auxiliary capacity and/or auxiliary frequency.

dia

off

The diaphragm rupture warning system is disabled.

A "Flow Control" metering monitor is connected.

The timer is active.

Only with

‘Password’

: the pump software is locked.

Only with

‘Password’

: the pump software has been temporarily unlocked.

The pump is in the

‘Menu’

(Set up).

Further explanations can be found in the "Trouble‐

shooting" chapter.

Overview of equipment and control elements

16

The pump only shows the metering volume and the

capacity in the calibrated state in l or l/h or in gal or

gal/h.

4.2 Key functions

Key Application In the continuous displays In the menu

[Back]

press - Move back to the previous menu

point (or a continuous display) -

without saving

[STOP/

START]

press Stop pump, Stop pump,

Start pump Start pump

[Menu]

press Move to the menu Move back to a continuous display

[Priming]

press Priming * Priming *

[Clickwheel]

press Start batch (only in

‘Batch’

operating

mode),

Acknowledge errors

Move to next menu option (or a

continuous display)

Confirm entry and save

[Clickwheel]

turn Switch between the continuous dis‐

plays

Change figure or change selection

* When priming the pump does not run at maximum

stroke rate.

If

[Priming] is pressed in ‘Stop’ state, then [Priming]

has top priority as long as the button is pressed.

Refer to the "Set-up basics" chapter to adjust figures

Overview of equipment and control elements

17

5 Functional description

5.1

Pump

The metering pump is an oscillating diaphragm pump, the stroke length of

which can be adjusted. An electric motor drives it. The slide rod transmits

the stoke motion to the diaphragms.

The stroke movement of the displacement body is continuously detected

and regulated so that the stroke is performed according to a previously set

metering profile - see chapter.

‘Metering’

‘setting’

.

The following metering profiles are available:

n Normal

n Metering optimised

n Priming optimised

Every metering profile is ineffective below the switch-

over frequency for Start/Stop mode.

Normal

0

s s

a)

180 360 0

b)

180 360

ω ω

P_PL_0009_SW

Fig. 9: Stroke movement at a) maximum stroke length and b) reduced

stroke length.

s Stroke velocity

⍵ Cam rotational angle

+ Discharge stroke

- Suction stroke

Metering optimised

With a metering optimised metering profile, the discharge stroke is elon‐

gated and the suction stroke is executed as quickly as possible. This set‐

ting is for example suitable for those applications that require optimum

mixing ratios and the most continuous chemical mixing possible.

Priming optimised

Illustration of the stroke movement

P_SI_0120_SW

s

t

P_SI_0103_SW

s

t

Functional description

18

With a priming optimised metering profile, the suction stroke is elongated

as much as possible, which facilitates the precise and problem-free

metering of viscous and gaseous media. Select this setting to minimise the

NPSH value as well.

5.2

Liquid end

The diaphragm (2) hermetically shuts off the pump volume of the dosing

head (4) towards the outside. The suction valve (1) closes as soon as the

diaphragm (2) is moved in to the dosing head (4) and the feed chemical

flows through the discharge valve (3) out of the dosing head. The dis‐

charge valve (3) closes as soon as the diaphragm (2) is moved in the

opposite direction due to the vacuum pressure in the dosing head and

fresh feed chemical flows through the suction valve (1) into the dosing

head. One cycle is thus completed.

4

2

1

5

3

13

Fig. 10: Cross-section through the liquid end

1 Suction valve

2 Diaphragm

3 Discharge valve

4 Dosing head

5 Backplate

13 Safety diaphragm

5.3 Bleed valve and integrated relief valve

Turning the rotary dial (3) on the bleed valve to "open" causes it to open

and the liquid end can be bled. Or it is used as a priming aid for priming

against pressure. The feed chemical flows out through the hose connec‐

tion (5), e.g. into a storage tank.

The integral relief valve operates in the "close" position as a simple,

directly controlled relief valve. As soon as the pressure exceeds the pres‐

sure value, which is preset using the large spring (1), it lifts the ball (2).

The feed chemical flows out through the hose connection (5), e.g. into a

storage tank.

P_SI_0104_SW

s

t

Bleed valve

Integral relief valve

Functional description

19

The integral relief valve can only protect the motor and the gear, and then

only against impermissible positive pressure that is caused by the

metering pump itself. It cannot protect the system against positive pres‐

sure.

The integral relief valve works as a bleed valve as soon as the rotary dial

(3) is turned to "open": The valve opens and the liquid end can be bled. Or

it is used as a priming aid for priming against pressure.

1 2

5

3

P_SI_0109

Fig. 11: Relief valve and integrated relief valve

1 Spring, large

2 Ball

3 Rotary dial

5 Hose connection

5.4 Multi-layer safety diaphragm

With the visual diaphragm rupture sensor, the lowered red cylinder (6)

springs forward beneath the transparent cover (7) so that it then becomes

clearly visible

Fig. 12.

With the electrical diaphragm rupture sensor, a switch is switched. A con‐

nected signalling device must signal the diaphragm rupture.

Fig. 12: Visual diaphragm rupture sensor, triggered and untriggered

The electrical diaphragm rupture sensor is connected to the "diaphragm

rupture indicator" terminal. If a diaphragm ruptures, the red LED "Fault"

display lights up on the pump and the identifier "Error" and

‘dia’

flash on

the LCD screen.

5.5 Operating modes

The operating modes are selected via the

‘Operating mode’

menu (some

operating modes may not be present depending on the identity code.)

Functional description

20

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