Richter Rmi-b series User manual

INSTALLATION AND OPERATING MANUAL

Translation of the original manual

Keep for future use!

This operating manual must be strictly observed before

transport, installation, operation and maintenance

Subject to change without notice.

Reproduction is generally permitted with indication of the source.

9430-005-en Revision 03 Edition 06/2022

Series RMI-B

Sealless Chemical Magnetic

Drive Pump

Close-coupled design

Series RMI-B close-coupled design Page 2 
 
 
9430-005-en Revision 03 
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List of Contents 
List of Contents................................................ 2 
Relevant documents........................................ 3 
1Technical data............................................. 3 
1 Tightening torques...........................................4 
2 Type plate, dry-running, ATEX and housing 
markings ...........................................................4 
3 Spare parts.......................................................4 
2Safety ........................................................... 5 
1 Intended use.....................................................5 
2 Notes on safety for the customer / operator 6 
3 Notes on safety for maintenance ..................6 
4 Conversion work and production of spare 
parts by the customer .....................................6 
5 Improper operation.......................................... 6 
6 Special requirements for explosion protection

6.1 Filling the unit........................................................7 
6.2 Special operating conditions...............................7 
6.3 Chargeable liquids................................................7 
6.4 Identification..........................................................7 
6.5 Check of the direction of rotation........................7 
6.6 Mode of operation of the pump...........................7 
6.7 Temperature limits................................................8 
6.8 Maintenance..........................................................8 
6.9 Electric peripheral equipment..............................8 
3Transport, storage and disposal............... 9 
1 Return consignments......................................9 
2 Disposal ............................................................9 
4Product description.................................. 10 
5Installation................................................. 11 
1 Safety regulations.......................................... 11 
2 Installation of pump/unit................................11 
3 Alignment of pump - motor...........................11 
4 Piping ..............................................................11 
4.1 Nominal size........................................................11 
4.2 Nozzle loads........................................................12 
4.3 Suction line..........................................................12 
4.4 Supply lines.........................................................12 
4.5 Discharge line .....................................................12 
4.6 Venting and evacuating.....................................12 
5 Pipe fittings.....................................................12 
6 Monitoring facilities........................................13 
7Drive................................................................ 13 
8 Electric connection........................................13 
 
 
6Commissioning / Shutdown.................... 14 
1 Initial commissioning .....................................14 
1.1 Filling the pump housing....................................14 
1.2 Start-up.................................................................14 
2 Operating limits ..............................................14 
2.1 Abrasive media....................................................14 
2.2 Min./max. flow rate..............................................14 
3 Shutdown ........................................................15 
4 Restarting........................................................15 
5 Improper operations and their consequences 
(examples) ......................................................15 
7Maintenance...............................................16 
1 Safety related screw connections................16 
2 Motor................................................................16 
3 Cleaning..........................................................16 
4 Stand-by pumps.............................................16 
5 Notes on dismantling.....................................16 
5.1 Protective clothing...............................................16 
5.2 Magnetic fields ....................................................16 
5.3 Changing the motor............................................16 
6 Dismantling.....................................................17 
6.1 Removing adapter..............................................17 
6.2 Dismantling motor, adapter and drive magnet 
assembly..............................................................17 
6.3 Dismantling the slide-in unit...............................17 
6.4 Dismantling housing/shaft spider......................18 
7 Notes on assembly........................................18 
7.1 Table for target dimension Z..............................19 
8 Assembly.........................................................20 
8.1 Assembly of housing / shaft spider...................20 
8.2 Assembly of slide-in unit....................................20 
8.3 Assembly of drive unit........................................20 
8.4 Final assembly ....................................................21 
9 Tests................................................................21 
8Malfunctions..............................................22 
9Sectional drawing......................................23 
1 Legend.............................................................23 
2 RMI-B in close-coupled design...................24 
Assembly aids...........................................25 
1 Boring templates............................................25 
2 Pull-off device for plain bearing bushes......25 
3 Dismounting device impeller - rotor.............25 
4 Insertion tool for shaft spider........................26 
5 Insertion tool for rotor circlip.........................26 

Series RMI-B close-coupled design Page 3

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Relevant documents

♦Data sheet

♦Works certificate

♦Sectional drawing

RMI-B close-coupled design 9430-00-3002

♦Installation drawing

♦Performance curves

♦Spare parts list

♦Operating manual and declaration of conformity

motor

♦Supplementary Installation and Operating Manual,

„ heating jacket “ 9000B001-en *

* if contained in the scope of delivery

Appendix to the operating manual:

♦Operational limits 9430-00-3030

♦Declaration of conformity with ATEX

♦Declaration of conformity without ATEX

♦Form for Safety Information Concerning the Con-

tamination QM 0912-16-2001_en

On request :

♦Magnetic drive data Richter TIS 0543-03-0001

♦Nozzle forces Richter TIS 0541-02-0006

♦Publication: "Centrifugal Pump Operation without

NPSH Problems"

♦Publication "Safe Operation of Magnetic Drive

Pumps“

1 Technical data

Manufacturer :

Richter Chemie-Technik GmbH

Otto-Schott-Str. 2

D-47906 Kempen

Telephone: +49 (0) 2152 146-0

Fax: +49 (0) 2152 146-190

E-Mail: [email protected]m

Internet:

Richter EP (Nanjing) Co., LTd.

No. 18 Ailing Rd., Moling,

Jiangning Dev. Zone

211111 Nanjing

P.R. China

Telephone: +86 (0) 25 5275-1718

Fax: +86 (0) 25 / 5275 1747

E-Mail: [email protected]

Internet:

Authorised person acc. to machinery directive

2006/42/EG: Gregor Kleining

Designation :

Single-stage, plastic-lined, magnetic drive chemical

centrifugal pump, series RMI-B, close-coupled design

Horizontal design, sealless, free of eddy currents

Technical specifications DIN EN ISO 15783 and DIN

EN ISO 5199 .

Connecting dimensions to ISO 2858 / DIN EN 22858

Flange connecting dimensions: DIN EN 1092-2, type B

(ISO 7005-2, type B) PN 16 and PN 20 (Class 150)

ATEX Directive 2014/34/EU

Machine Directive 2006/42/EC

Materials :

Pressurized parts:

Ductile cast iron ASTM A 395 / EN-JS 1049

Wetted parts:

PFA, PTFE, SSiC

and see data sheet.

Flow rate : up to 120 m3/h (at 2900 min-1)

up to 130 m3/h (at 3500 min-1)

Delivery head : up to 70 m LC (at 2900/min-1)

up to 100 m LC (at 3500 min-1)

Housing discharge pressure:

max. 16 bar, (12 bar at –10 °C down to –30 °C)

optional 20 bar (16 bar at –10 °C down to –30 °C)

Temperature range : -30 °C to 150 °C

Temperature classes as per ATEX :

see Section 2.6.7.

Admissible ambient conditions for pumps acc. to

directive 2014/34/EU (ATEX) :

Ambient temperature range: –20 °C to + 60 °C

Ambient pressure range: 0,8 barabs to 1,1 barabs

Noise capacity level : LWA = ≤ 70 dB

acc. to DIN EN ISO 9614-2

Sizes :

Group 1.1

Group 1.2

Group 1.3

40-25-125

40-25-160

50-32-200

50-32-125

50-32-160

65-40-200

80-50-160

80-50-200

80-65-160

Weight : See data sheet

Dimensions : See installation drawing

Series RMI-B close-coupled design Page 4

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1.1 Tightening torques

Screws greased, tighten in diametrically opposite se-

quence

Housing screws 901/3

Size

No. x size

Tightening torque

PN 16

PN20

[mm]

[DIN/ISO]

[Nm]

40-25-125

8 x M12

50-32-125

8 x M12

40-25-160

8 x M12

50-32-160

8 x M12

80-50-160

8 x M12

80-65-160

8 x M12

50-32-200

12 x M12

65-40-200

12 x M12

80-50-200

12 x M12

Pipe screws, flanges to DIN/ISO

No. x size

Tightening torque

PN 16

PN20

PN 16

PN20

[mm]

[DIN/ISO]

[Nm]

4 x M12

4 x M14

4 x M16

4 x M14

4 x M16

4 x M14

4 x M16

8 x M16

4 x M16

1.2 Type plate, dry-running, ATEX

and housing markings

The stainless steel type plate is undetachably riveted

to the adapter.

If the operator attaches his identification, it must be en-

sured that the pump matches the application in ques-

tion.

Example of type plate:

Dry-running:

ATEX marking:

Housing identification:

The following are visible on the housing according to

DIN EN 19:

♦Flange nom. size

♦Rated pressure

♦Body material

♦Manufacturer's identification

♦Melt number/Foundry identification

♦Foundry date

1.3 Spare parts

Spare parts for two years of continuous operation in ac-

cordance with DIN 24296 and in consultation with the

manufacturer.

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2 Safety

This operating manual contains fundamental

information which is to be observed during installation,

operation and maintenance.

It must be read before installation and

commissioning!

This operating manual must always be available at the

place of use of the machine/plant.

Observe the safety notes in all the chapters.

Installation, operation and maintenance are to be per-

formed by qualified staff.

The area of responsibility, authority and supervision of

the staff must be exactly regulated by the customer.

If the staff does not have the necessary expertise, they

are to be trained and instructed.

If necessary, this can be provided by the manufac-

turer/supplier on behalf of the machine operator.

General hazard symbol! People may be

put at risk.

Safety symbol! The pump and its function

may be put at risk if this safety symbol is not

observed.

EU marking! Explosion-protected equip-

ment must be identified for work in poten-

tially explosive areas.

Warning of a magnetic field!

Warning of electric power!

This warning sign must be used if people

with a pacemaker are at risk, e.g. from a

strong magnetic field.

It is imperative to observe signs attached directly to the

pump / unit, e.g.:

♦Direction of rotation arrow

♦Warning against dry-running

♦Type plate

and they are to be kept legible.

Non-observance of the notes on safety may result

in the loss of any and all claims for damages.

Non-observance may involve the following hazards:

♦Failure of important functions of the machine/plant.

♦Failure of electronic equipment and measuring in-

struments due to magnetic fields.

♦Risk to people and their personal property from

magnetic fields.

♦Risk to people from electric, mechanical and chem-

ical effects.

♦Risks to the environment through leaks of hazard-

ous substances.

If the unit is used in potentially

explosive areas, special attention is to

be paid to the sections identified with

“Ex” in this operating manual.

2.1 Intended use

Richter pumps of the series RMI-B are plastic-lined

magnetic drive centrifugal pumps for the leak-free con-

veyance of aggressive, toxic, pure and inflammable liq-

uids. The pump is equipped with a permanent magnetic

synchronous drive.

♦Only operate the pump / the unit in a technically per-

fect condition.

♦Only use the pump with the media described in the

data sheet.

♦For vertical installation of the pump, please consult

the manufacturer.

The observance of the specified physical limits is im-

portant for perfect functioning and safe operation, es-

pecially with regard to explosion protection to prevent

potential sources of ignition (see Section 2.6):

♦Avoid dry running

♦Ensure that the pump is commissioned only with the

pumped medium and is not operated without.

♦For safe pump operation, we recommend a flow rate

between 0.3 and 1.1 Qopt. The maximum operating

temperature must never be exceeded. See Section

2.6.7. In case of doubt, you must consult the manu-

facturer.

♦The manufacturer must be consulted in the event of

entrainment of gas >2% as well as solids in order to

avoid a lack of lubrication and dry-running.

♦The plant NPSH value (NPSHA) should be 0.5 m

higher than the NPSH value of the pump (NPSHR).

See also Section 5.4.1.

Operation with closed shut-off elements in the suc-

tion and/or discharge lines is not permitted!

There is a risk that even after a short time

high surface temperatures on the pump

housing may occur owing to rapid heating

of the liquid in the pump interior.

Series RMI-B close-coupled design Page 8

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A rapid rise in the pressure inside the pump

involves the risk of overloading to the point

of bursting.

The pump must not be in operation in

the unfilled or partially filled state (dry

running). This results in serious damage

to the pump and additional risks to the

environment can arise.

Dry-running cannot only occur with an insuffi-

ciently filled interior but also in the event of

high gas contents in the liquid medium.

Operation of the pump outside the admissible operating

range may also lead to dry-running (e.g. due to

evaporation in the interior).

2.6.7 Temperature limits

In the normal operating condition the high-

est temperatures are to be expected on the

surface of the pump housing.

In the case of media >40° C the surface temperature

of the pump housing is generally lower than the tem-

perature of the medium as the plastic lining acts as in-

sulation.

If the pump is heated (e.g. heating jacket),

it must be ensured that the temperature

classes prescribed in the annex are ob-

served.

The not heated pump surface must have free contact

with the environment.

When operating the pump, make sure that

an excessive deposit of dust is avoided

(possibly regular cleaning). This prevents

the pump surface from heating to above the

admissible temperature.

The plant customer must ensure that the

prescribed operating temperature is observed. The

maximum admissible temperature of the liquid

medium at the pump inlet depends on the

temperature class and the selected lining material

required in each case.

The following always applies: No inadmissible temper-

atures may be introduced into the motor and the spec-

ifications of the motor manufacturer and VDMA/TVEI

24263 must be observed.

The temperature limit values of the pumped liquid spec-

ified in Table 2 are only valid if motors are used for

which the motor manufacturer permits at least the fol-

lowing surface temperatures for the motor flange and

motor shaft as per Table 1:

Table 1

Temperature

class as per

DIN EN ISO 80079-36

Limit value of the pumped

liquid temperature

PFA

T4 135 °C

125 °C

T3 200 °C

150 °C

Observe the data given by the engine manufacturers or

the VDMA / ZVEI 24263 about impermissible ambient

temperatures. The absence of this information is to be

expected to be at most 40 ° C.

Table 2 below indicates the admissible medium tem-

perature, depending on the pump design, as a function

of the temperature class in accordance with DIN EN ISO

80079-36.

Table 2

Temperature

class as per

DIN EN ISO 80079-36

Limit value of the pumped

liquid temperature

PFA

T4 135 °C

125 °C

T3 200 °C

150 °C

For engines with the type of protection "increased

safety", only low surface temperatures are permitted on

the motor shaft or on the motor flange.

In these cases the max. permissible medium tempera-

ture is 20 K above the permissible surface temperature

at the interfaces to the motor.

e. g.: max. motor shaft temperature: 60°C

max. motor flange temperature: 65°C

This results in a permissible medium temperature

for the pump of 80 °C (60 °C + 20K).

No information on the permissible ambient temperature

is to be assumed for a maximum of 40 ° C.

2.6.8 Maintenance

To achieve safe and reliable operation, it

must be ensured in inspections at regular

intervals that the unit is properly serviced

and kept in technically perfect order.

In regard to media containing solids, the maintenance

intervals must be set by the operator in accordance

with the conditions of operation.

If auxiliary systems (e.g. cooling, heating) are installed,

check to see whether monitoring facilities are required

to ensure their function.

2.6.9 Electric peripheral equipment

Electric peripheral equipment, e.g. pres-

sure, temperature and flow sensors etc.

must comply with the prevailing safety re-

quirements and explosion protection provi-

sions.

Regular checks of the motor bearings in accordance

with the operating manual of the motor manufacturer.

Observe ATEX notes.

Series RMI-B close-coupled design Page 9

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3 Transport, storage and disposal

The pump or the unit must be transported

properly. It must be ensured that during

transport the pump/unit remains in the

horizontal position and does not slip out of

the transport suspension points.

A pump or motor can be suspended from the ring bolt

provided for this purpose.

The suspension points are not suitable for transporting

a complete unit, i.e. pump with base plate and motor.

In this case, the slinging points for the ropes on the

base plate are to be used. See Fig. 1.

exception:

The base plate 270 x 500 mm for pumps in group 1

does not have any rope stops. In this case, the unit

(pump, motor and base plate) is suspended from the

crane eyelets of pump and motor.

The slinging ropes must not be attached to free shaft

ends.

Fig. 1

Directly after receipt of the goods, check the con-

signment for completeness and any in-transit

damage.

Damaged pumps must not be installed in the plant.

When unpacking magnetic drives as sin-

gle parts, the relevant notes in Section

7.5.2 must be observed.

Handle goods carefully to prevent damage.

Flange covers serve as protection during transport

and must not be removed.

If the unit is not installed immediately after delivery,

store them properly.

The pumps be stored in a dry, vibration-free and well-

ventilated room at as constant a temperature as pos-

sible.

Protect elastomers against UV light.

Generally, a storage period of 10 years do not

exceeded. An admissible storage period of 4 years

applies to elastomers made of NBR.

If magnetic drives are stored as single parts,

the relevant notes in Section 7.5.2 are to be

observed.

In the case of prolonged storage conservation agents

on machined component surfaces and packing with a

desiccant may be necessary.

3.1 Return consignments

Pumps which have conveyed aggressive

or toxic media must be well flushed and

cleaned before being returned to the man-

ufacturer's works.

It is imperative to enclose a safety information sheet

/ general safety certificate on the field of application

with the return consignment.

Pre-printed forms are enclosed with the installation

and operating manual.

Safety precautions and decontamination methods are

to be mentioned.

3.2 Disposal

Parts of the pump may be contaminated with medium

which is detrimental to health and the environment and

therefore cleaning is not sufficient.

Risk of personal injury or damage to the

environment due to the medium or oil!

♦Wear protective clothing when work is performed

on the pump.

♦Prior to the disposal of the pump:

♦Collect any medium, oil etc. which has escaped

and dispose of it in accordance with the local

regulations.

♦Neutralise any medium residues in the pump.

♦Separate pump materials (plastics, metals etc.)

and dispose of them in accordance with the local

regulations.

Series RMI-B close-coupled design Page 10

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4 Product description

The housing dimensions, nominal ratings and technical

requirements of the pump series RMI-B correspond to

ISO 2858 / DIN EN 22858 / DIN EN ISO 15783 / DIN

EN ISO 5199. The technical requirements of the VDMA

24279 are satisfied

The sectional drawing shows the design of the pump.

See Section 9.2.

All components which come into contact with the me-

dium are either plastic-lined or made of other resistant

materials, e.g. silicon carbide.

The housing 100 consists of a metallic shell with a plas-

tic lining.

The shaft spider 338 is pressed into the housing and

secured with the anti-torsion inserts 566/1.

The two bearing bushes 545 are pressed in from the

bearing pedestal side and secured with the anti-torsion

insert 566/2.

The distance ring 504/1 is inserted in-between.

The can 159 is made of high-resistance CFK (carbon

fibre composite material). It is protected against the

corrosive medium by a can insert 158 made of PTFE.

The thrust ring 510/3 is pressed in and locked with the

shaft 222 in a form-locking manner against twisting.

The shaft 222 is positively mounted in the can insert

158.

The impeller 230 and the inner magnet assembly 859

are separable and thus can be exchanged inde-

pendently of one another. Both components are posi-

tively connected to one another for force transmission.

The static tightness of the pump is guaranteed by the

screw fittings of the bracket 344 and housing 100. The

sealing collar of the wear ring seal 502/1 and the rims

of the can unit are clamped between the two compo-

nents with the required sealing force.

The torque is transmitted from the motor shaft through

whose key to the drive magnet assembly 858.

This is secured axially on the motor shaft with two set-

screws 904/1. The magnets are glued in the drive

magnet assembly.

In the case of a leakage of the can unit, the closed

lamella construction provides a temporary additional

protection against media leakage into the

atmosphere.

The flushing flow is guided on the outside past the im-

peller assembly into the can. The flushing flow returns

to the housing through flushing bores in the impeller

assembly and through the plain bearings.

Further design details are provided in the enclosed

drawing. Additional information are provided in the

brochure and the product manual.

Series RMI-B close-coupled design Page 11

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5 Installation

5.1 Safety regulations

Equipment which is operated in potentially ex-

plosive areas must satisfy the explosion pro-

tection regulations.

People with a pacemaker are at risk from the

strong magnetic field of the magnetic drive. It

may be life-threatening for them to stay at a

distance of less than 500 mm to the pump.

5.2 Installation of pump/unit

The structural work must be prepared in accordance

with the dimensions in the installation drawing.

Method of installation: on a grouted base plate and firm

foundation

♦Align base plate on the ground foundation.

♦Insert foundation bolts and grout base plate.

♦Do not tighten the foundation bolts uniformly and

firmly until the mortar has set.

Other possibilities of installing the pump are:

♦4-point installation

♦4-point installation with base plate.

As soon as additional installations are

mounted, the stability of the entire unit

installed without a foundation must be

checked.

5.3 Alignment of pump - motor

The following information is of a general na-

ture. Special notes of the motor manufac-

turer are to be observed.

♦Before starting alignment, undo the screw fitting of

the support bracket from the adapter and motor.

♦Align the unit with the housing so that there is no

tension and retighten the screws.

♦Use supports in the direct vicinity of the bolts foun-

dation/base plate.

5.4 Piping

Before the pump is installed, both, the suction and sup-

ply lines as well as the discharge line are to be cleaned.

Dirt or damage to the sealing surfaces is best avoided

if the flange covers remain on the flanges until just be-

fore installation.

Use flange gaskets suitable for the medium.

The screw tightening torques in Section 1.1 are to be

observed for tightening the flange screws.

5.4.1 Nominal size

The operating design point of a centrifugal pump lies

at the intersection of the pump curve and the pipe

curve, see Fig. 2. The pump curve is provided by the

pump manufacturer. The pipe curve is determined us-

ing diagrams or PC programs.

Fig. 2

Under no circumstances can the nominal size of the

piping be derived from the connected nominal size of

the pump.

The pipe nominal size can also be determined using

the flow rate as a rough guide.

)m(A )s/m(Q

)s/m(v 2

The velocity in the suction line should not exceed 2.0

m/s and 5.0 m/s in the discharge line.

When determining the suction line nominal size, the

NPSH value (net positive suction head) must also be

observed. The NPSHR value required for the pump

is specified in the data sheet.

The NPSHR available in the plant

should be at least 0.5 m higher

than the NPSHR required for the

pump. Otherwise, this will lead to

a drop in the delivery head,

cavitation or even failure of the

pump.

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5.4.2 Nozzle loads

The pump can be subjected to nozzle loads acc. to DIN

EN ISO 5199. See also TIS 0541-02-0006.

Changes in the length of the piping caused by

temperature are to be allowed for by appropriate

measures, e.g. the installation of expansion joints.

5.4.3 Suction line

The suction lines must always be laid on a rising gradi-

ent towards the pump. Otherwise, gas bubbles may

form which considerably reduce the suction line cross

section. Eccentric transition elements must be installed

between different pipe diameters.

Valves which disrupt the course of flow should not be

installed directly upstream of the pump.

Fig. 3

5.4.4 Supply lines

Supply lines should vent towards the reservoir and are

therefore to be laid with a constant downward gradient

towards the pump. Should the piping internals

upstream of the pump be horizontal, a low point can, of

course, be located upstream of these internals. From

here the pipe is then laid with an upward gradient to the

pump so that the gas bubbles which form here can

escape through the pump.

Valves which disrupt the course of flow should not be

installed directly upstream of the pump.

5.4.5 Discharge line

Do not arrange the shut-off valve directly above the

pump but initially provide a transition section.

The discharge nozzle velocity of the medium can –if

necessary –be reduced.

5.4.6 Venting and evacuating

Venting can take place into the discharge line or

upstream of the discharge valve.

A venting line can also be used as a bypass, drain or

flushing line.

The pump housing is fitted with a drain connection as

a standard feature. Optionally, the drain bore can be

drilled.

See Fig. 4.

Fig. 4

5.5 Pipe fittings

The following pipe fittings are available from Richter

on request:

♦Shut-off valves

♦Check valves

♦Sight glasses

♦Priming vessels

♦Strainers

♦Pressure gauges

Fig. 5

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5.6 Monitoring facilities

Appropriate monitoring facilities are to be

recommended, depending on the require-

ments placed on operational safety and

availability of the unit.

Richter provides information on request and can sup-

ply:

♦Flow meters

♦Filling level indicators

♦Motor load monitors

You can obtain the publications "Safe Operation of

Magnetic Drive Pumps" and "The Operation of

Centrifugal Pumps without NPSH Problems" on

request.

5.7 Drive

The power consumption of the pump at the operating

design point is specified in the data sheet and works

certificate. If the operating design point was not known

when the pump was dispatched, the power consump-

tion can be read off the appropriate performance

curves. The max. density, the max. viscosity and a

safety margin are to be allowed for.

Care must be taken when selecting the motor size to

ensure that the excess power is not too great but that

the requirements acc. to DIN EN ISO 5199 are satis-

fied. During start-up the magnetic drive could other-

wise stop.

The magnetic drive rating at the pump speed is given

in the pump data sheet.

If the motor rating exceeds this magnetic drive rating –

at pump speed -, it is necessary to check for any stop-

page of the magnetic drive.

This also applies if the required drive rating exceeds

80% of the magnetic drive rating –at pump speed.

Consult Richter if necessary.

Different operating data can be achieved without

changing the pump through the use of different speeds,

e.g. by means of a frequency converter.

The pump with base plate and motor is illustrated in the

installation drawing.

The operating manual of the motor manufacturer must

be observed.

A motor with a valid ATEX certificate is to

be used if employed in zone 1 and 2.

5.8 Electric connection

The operator is obligated to connect the assembly in

accordance with existing regulations (IEC, VDE, etc.).

Only have the electric connection

performed by a qualified electrician.

Compare the available mains voltage with the infor-

mation on the type plate of the motor and select a suit-

able circuit.

A motor protection device (motor-circuit switch) is

urgently recommended.

Danger of explosion if the electrical

installation is incorrect.

In potentially explosive areas IEC 60079-

14 must also be observed for the electri-

cal installation.

If the pump is mounted on a base plate, ensuring elec-

trical conduction through the use of a chopper disk or

contact disk on the housing foot and support bracket.

The assembly must be grounded in accordance with

currently effective regulations, for example, on the

base plate.

Series RMI-B close-coupled design Page 14

9430-005-en Revision 03

TM 10456 Edition 06/2022

6 Commissioning / Shutdown

6.1 Initial commissioning

Normally, the pumps have already been test-run with

water.

Unless special agreements have been reached, there

may still be some residual amounts of water in the

pump. This must be noted in view of a possible reaction

with the medium.

6.1.1 Filling the pump housing

♦Check to see whether the screws on the suction

flange, discharge flange, housing flange and drain

flange are tightened. When tightening the housing

screws, make sure that the screw connection on the

support bracket of the adapter or the motor is re-

leased. Otherwise, the pump could be deformed.

For screw tightening torques see Section 1.1.

♦Open the suction line fully so that the medium can

flow into the pump.

♦Open the discharge valve so that the air in the pump

can escape.

♦If air cannot be vented into the discharge line, e.g.

a drop in pressure in this line is not permitted, vent-

ing must be performed upstream of the discharge

valve.

♦Monitor the venting operation until no air but only

liquid emerges.

♦Turn the pump shaft at the coupling several times.

♦Monitor the venting operation again until no more

air emerges.

♦Close the discharge valve again until only

the minimum flow rate is obtained after the

motor has been started.

6.1.2 Start-up

♦Check to see whether the pump shaft can

be readily turned by hand.

♦As viewed from the motor, the direction of rotation

of the pump is clockwise. See also the direction of

rotation arrow of the pump.

The pump must not run dry during the

check of the direction of rotation.

The pump must be completely filled with liquid.

The maximum admissible flow rate must not be ex-

ceeded.

Otherwise the plain bearings can run dry

in both cases.

♦Switch the motor on.

♦Set the desired flow by opening the discharge

valve.

When the motor is running but the pump

is not conveying, this means that the mag-

netic drive has stopped.

♦Switch motor off immediately in order to prevent

overheating of the magnet assemblies.

Then proceeded as follows:

♦Close discharge valve down to the position "mini-

mum flow rate"

♦Start motor again.

If the magnetic drive stops again, look for the cause.

6.2 Operating limits

The operating limits of the pump/unit in

terms of pressure, temperature, power

and speed are entered in the data sheet

and it is imperative to observe them!

6.2.1 Abrasive media

If liquids with abrasive constituents are

conveyed, increased wear at the pump is

to be expected. The inspection intervals

are to be reduced compared with the

usual times.

6.2.2 Min./max. flow rate

The operating range generally recommended lies at

0.3 Qopt to 1.1 Qopt. Consult the manufacturer for

operation outside this range and observe Section

2.6.2.

Series RMI-B close-coupled design Page 15

9430-005-en Revision 03

TM 10456 Edition 06/2022

6.3 Shutdown

♦Close discharge valve down to the position "mini-

mum flow rate"

♦Switch motor off.

♦Close discharge valve completely.

Only close the suction line if the pump is to be evacu-

ated or dismantled.

For all work on the machine, make sure that

the motor cannot be inadvertently switched

on.

If the pump is to be evacuated or flushed, ob-

serve the local regulations.

If the pump has been operated with a charge-

able liquid, it must be filled with inert gas (e.g.

nitrogen) to prevent an explosive atmosphere.

It is recommended to wait one hour before the pump is

dismantled from the plant to permit static peak charges

to be eliminated.

If the pump is returned to the manufacturer's, clean the

pump very thoroughly.

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