Wilo Multivert mvi 16 series User manual

DEinbau- und Betriebsanleitung

GB Installation and operating instructions

FNotice de montage et de mise en service

IIstruzioni di montaggio, uso e manutenzione

Wilo-Multivert MVI 16.../ MVI 32.../ MVI 52.../ MVI 70.../ MVI 95...

2 040 502 - Ed3/0805 pdf

Fig. 1

MVI 16... /MVI 32... /MVI 52...

Fig. 1

MVI 70.../MVI 95...

Fig. 3

Fig. 2

Fig. 4

CE-Konformitätserklärung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

1. Allgemeines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2. Sicherheit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3. Transport und Zwischenlagerung . . . . . . . . . . . . . . . . . . . . . . 5

4. Beschreibung von Erzeugnis und Zubehör . . . . . . . . . . . . . . . 5

5. Aufstellung / Einbau . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

6. Inbetriebnahme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

7. Wartung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

8. Störungen, Ursachen und Beseitigung . . . . . . . . . . . . . . . . . . 8

EC declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

1. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2. Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3. Transport and interim storage . . . . . . . . . . . . . . . . . . . . . . . . . 10

4. Product and accessory description . . . . . . . . . . . . . . . . . . . . . 10

5. Assembly /Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6. Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

8. Problems, Causes and Solutions . . . . . . . . . . . . . . . . . . . . . . 13

Déclaration de conformité CE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

1. Généralités . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2. Sécurité . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3. Transport et stockage avant utilisation . . . . . . . . . . . . . . . . . . 15

4. Description du produit et de ses accessoires . . . . . . . . . . . . . 15

5. Installation / Montage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6. Mise en service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

7. Entretien . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

8. Pannes, causes et remèdes . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Dichiarazione di conformità CE . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

1. Introduzione . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2. Sicurezza . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3. Trasporto e magazzinaggio . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4. Descrizione del prodotto e degli accessori . . . . . . . . . . . . . . . 20

5. Istruzioni di montaggio einstallazione . . . . . . . . . . . . . . . . . . . 21

6. Messa in esercizio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

7. Manutenzione . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

8. Risoluzione di problemi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

D EG - Konformitätserklärung

GB EC – Declaration of conformity

F Déclaration de conformité CEE

Hiermit erklären wir, dass die Bauarten der Baureihe : MVI 16

Herewith, we declare that this product: MVI 32

Par le présent, nous déclarons que cet agrégat : MVI 52

MVI 70

MVI 95

in der gelieferten Ausführung folgenden einschlägigen Bestimmungen entspricht:

in its delivered state comply with the following relevant provisions:

est conforme aux dispositions suivants dont il relève:

EG-Maschinenrichtlinie 98/37/EG

EC-Machinery directive

Directives CEE relatives aux machines

Elektromagnetische Verträglichkeit - Richtlinie 89/336/EWG

Elektromagnetic compatability - directive i.d.F/ as amended/ avec les amendements suivants:

Compatibilité électromagnétique- directive 91/263/EWG

92/31/EWG

93/68/EWG

Niederspannungsrichtlinie 73/23/EWG

Low voltage directive i.d.F/ as amended/ avec les amendements suivants :

Direction basse-tension 93/68/EWG

Angewendete harmonisierte Normen, insbesondere: EN 809

Applied harmonized standards, in particular: EN 60034-1

Normes harmonisées, notamment:

Dortmund, 11.04.2005

Erwin Prieß

Quality Manager

WILO AG

Nortkirchenstraße 100

44263 Dortmund

Document: 2060375.1

NL EG-verklaring van overeenstemming

Hiermede verklaren wij dat dit aggregaat in de

geleverde uitvoering voldoet aan de volgende

bepalingen:

EG-richtlijnen betreffende machines 98/37/EG

Elektromagnetische compatibiliteit

89/336/EEG als vervolg op 91/263/EEG,

92/31/EEG, 93/68/EEG

EG-laagspanningsrichtlijn 73/23/EEG als

vervolg op 93/68/EEG

Gebruikte geharmoniseerde normen, in het

bijzonder: 1)

I Dichiarazione di conformità CE

Con la presente si dichiara che i presenti

prodotti sono conformi alle seguenti

disposizioni e direttive rilevanti:

Direttiva macchine 98/37/CE

Compatibilità elettromagnetica 89/336/CEE e

seguenti modifiche 91/263/CEE, 92/31/CEE,

93/68/CEE

Direttiva bassa tensione 73/23/CEE e

seguenti modifiche 93/68/CEE

Norme armonizzate applicate, in particolare: 1)

E Declaración de conformidad CE

Por la presente declaramos la conformidad

del producto en su estado de suministro con

las disposiciones pertinentes siguientes:

Directiva sobre máquinas 98/37/CE

Directiva sobre compatibilidad

electromagnética 89/336/CEE modificada por

91/263/CEE, 92/31/CEE, 93/68/CEE

Directiva sobre equipos de baja tensión

73/23/CEE modificada por 93/68/CEE

Normas armonizadas adoptadas, especialmente: 1)

P Declaração de Conformidade CE

Pela presente, declaramos que esta unidade

no seu estado original, está conforme os

seguintes requisitos:

Directivas CEE relativas a máquinas 98/37/CE

Compatibilidade electromagnética 89/336/CEE

com os aditamentos seguintes 91/263/CEE,

92/31/CEE, 93/68/CEE

Directiva de baixa voltagem 73/23/CEE com

os aditamentos seguintes 93/68/CEE

Normas harmonizadas aplicadas, especialmente: 1)

S CE- försäkran

Härmed förklarar vi att denna maskin i

levererat utförande motsvarar följande

tillämpliga bestämmelser:

EG–Maskindirektiv 98/37/EG

EG–Elektromagnetisk kompatibilitet – riktlinje

89/336/EWG med följande ändringar

91/263/EWG, 92/31/EWG, 93/68/EWG

EG–Lågspänningsdirektiv 73/23/EWG med

följande ändringar 93/68/EWG

Tillämpade harmoniserade normer, i synnerhet: 1)

N EU-Overensstemmelseserklæring

Vi erklærer hermed at denne enheten i

utførelse som levert er i overensstemmelse

med følgende relevante bestemmelser:

EG–Maskindirektiv 98/37/EG

EG–EMV–Elektromagnetisk kompatibilitet

89/336/EWG med senere tilføyelser:

91/263/EWG, 92/31/EWG, 93/68/EWG

EG–Lavspenningsdirektiv 73/23/EWG med

senere tilføyelser: 93/68/EWG

Anvendte harmoniserte standarder, særlig: 1)

FI CE-standardinmukaisuusseloste

Ilmoitamme täten, että tämä laite vastaa

seuraavia asiaankuuluvia määräyksiä:

EU–konedirektiivit: 98/37/EG

Sähkömagneettinen soveltuvuus 89/336/EWG

seuraavin täsmennyksin 91/263/EWG

92/31/EWG, 93/68/EWG

Matalajännite direktiivit: 73/23/EWG seuraavin

täsmennyksin 93/68/EWG

Käytetyt yhteensovitetut standardit, erityisesti: 1)

DK EF-overensstemmelseserklæring

Vi erklærer hermed, at denne enhed ved

levering overholder følgende relevante

bestemmelser:

EU–maskindirektiver 98/37/EG

Elektromagnetisk kompatibilitet: 89/336/EWG,

følgende 91/263/EWG, 92/31/EWG,

93/68/EWG

Lavvolts-direktiv 73/23/EWG følgende

93/68/EWG

Anvendte harmoniserede standarder, særligt: 1)

H EK. Azonossági nyilatkozat

Ezennel kijelentjük,hogy az berendezés az

alábbiaknak megfelel:

EK Irányelvek gépekhez: 98/37/EG

Elektromágneses zavarás/türés: 89/336/EWG

és az azt kiváltó 91/263/EWG, 92/31/EWG,

93/68/EWG

Kisfeszültségü berendezések irány-Elve:

73/23/EWG és az azt kiváltó 93/68/EWG

Felhasznált harmonizált szabványok, különösen: 1)

CZ Prohlášení o shoděEU

Prohlašujeme tímto, že tento agregát

v dodaném provedení odpovídá následujícím

příslušným ustanovením:

Směrnicím EU–strojní zařízení 98/37/EG

Směrnicím EU–EMV 89/336/EWG ve sledu

91/263/EWG, 92/31/EWG, 93/68/EWG

Směrnicím EU–nízké napětí 73/23/EWG ve

sledu 93/68/EWG

Použité harmonizační normy, zejména: 1)

PL Deklaracja Zgodności CE

Niniejszym deklarujemy z pełną

odpowiedzialnosciąże dostarczony wyrób jest

zgdony z następującymi dokumentami:

EC–dyrektywa dla przemysłu maszynowego

98/37/EG

Odpowiedniość elektromagnetyczna

89/336/EWG ze zmianą91/263/EWG,

92/31/EWG, 93/68/EWG

Normie niskich napięć 73/23/EWG ze zmianą

93/68/EWG

Wyroby sązgodne ze szczegółowymi normami

zharmonizowanymi: 1)

RUS Деклация осоответствии

Европейским нормам

Настоящим документом заявляем, что

данный агрегат вего объеме поставки

соответствует следующим нормативным

документам:

Директивы EC вотношении машин

98/37/EG

Электромагнитная устойчивость

89/336/EWG споправками 91/263/EWG,

92/31/EWG, 93/68/EWG

Директивы по низковольтному напряжению

73/23/EWG споправками 93/68/EWG

Используемые согласованные стандарты и

нормы, вчастности : 1)

GR ∆ήλωση προσαρµογής στις προδιαγραφές

της Ε.Ε. (Ευρωπαϊκής Ένωσης)

∆ηλώνουµεότι το προϊόν αυτό σ’ αυτή την

κατάσταση παράδοσης ικανοποιεί τις

ακόλουθες διατάξεις :

Οδηγίες EG σχετικά µεµηχανήµατα 98/37/EG

Ηλεκτροµαγνητική συµβατότητα EG-

89/336/EWG όπως τροποποιήθηκε

91/263/EWG 92/31/EWG, 93/68/EWG

Οδηγία χαµηλής τάσης EG–73/23/EWG όπως

τροποποιήθηκε 93/68/EWG

Εναρµονισµένα χρησιµοποιούµενα πρότυπα,

ιδιαίτερα: 1)

TR EC Uygunluk Teyid Belgesi

Bu cihazın teslim edildiği şekliyle aşağıdaki

standartlara uygun olduğunu teyid ederiz:

AB-Makina Standartları98/37/EG

Elektromanyetik Uyumluluk 89/336/EWG ve

takip eden, 91/263/EWG, 92/31/EWG,

93/68/EWG

Alçak gerilim direktifi 73/23/EWG ve takip

eden, 93/68/EWG

Kısmen kullanılan standartlar: 1)

1) EN 809,

EN 60034-1.

Erwin Prieß

Quality Manager

WILO AG

Nortkirchenstraße 100

44263 Dortmund

ENGLISH

1General Information

Installation and commissioning only by qualified personnel

1.1 Uses

The pump is suitable for hot and cold water and other fluids free from

mineral oil and without abrasives or long-fibred substances. The main

areas of use are in water supply installations, as a booster pump, as a

boiler feeder pump, in industrial circulation systems, in process tech-

nology, in cooling water systems, in fire extinguishers and in washing

and sprinkler installations.

1.2 Product data

1.2.1Connection and electrical data (Table 1)

Pumping medium allowed

Permissible media temperature

Maximum ambient temperature

Maximum permissible working pressure: at the inlet (inlet pressure see paragraph 5.3)

at the outlet, for a 2 pole motor

Mains voltages DM: for P2 ≤4 kW:

for P2 ≥5.5 kW:

Standard motor for P2 ≤5.5 kW:

for P2 ≥7.5 kW:

Speed 2 pole version

4 pole version

Mains fuse protection

Insulation class

System of protection

Drinking water in acc. with Drinking Water Order

Heating water / service water

Condensate

Water/glycol mixture1)

Other liquid media2)

-15°C to +120 °C

(Follow catalogue instructions)

+40 °C

16/10 bar

16/25 bar

16/16 bar

3 ~ 230/400 V ±10 %, 50 Hz

3 ~ 400 V ± 10 %, 50 Hz

V 18 standard motor

V 1 standard motor

2900 RPM

1450 RPM

see motor rating plate

IP 55

better protective systems available

1)When using a water-glycol mixture containing up to 40% glycol (or media with a viscosity different to that of pure water, the flow data for the pump must be adjusted accord-

ing to the higher viscosity of the flow media, regardless of the percentage of the viscous matter. Only use branded goods with corrosion protection-inhibitors, follow manufac-

turer’s instructions.

2)If other and also aggressive chemical fluids are to be pumped, be sure to follow catalogue instructions and first obtain the approval of WILO.

Principal dimensions and connection dimensions (Table 2, see also Fig. 3):

When ordering spare parts, please give all the information on the pump/motor rating plate.

Types PN16 version PN25 version

A B Y W Z E F J K A B Y W Z E F J K

MVImm mm

1602 è1614 DN50 194 252 20 215 130 300 90 125 4x18 194 252 20 215 130 300 90 125 4x18

3202 è3216 DN65 235 235 35 195 195 320 105 145 4x18 260 260 35 220 220 320 120 145 8x18

5202 è5212 DN80 260 260 30 220 220 320 105 160 8x18 260 260 30 220 220 320 105 160 8x18

7001 è7007 DN100 261 350 45 280 199 380 140 180 8x19 261 350 45 280 199 380 140 190 8x23

9501 è9506 DN100 261 350 45 280 199 380 140 180 8x19 261 350 45 280 199 380 140 190 8x23

ENGLISH

1.2.2 Type key

MVI 16 08 3 / 16 / E / 3 - 400 - 50 - 2 / XX / X

Design MVI

(Multistage, vertic.

Special steel-(Inox-)

centrifugal pump)

Flow rate [m3/h]

(2-pole/ 50 Hz)

Number of

impellers in row

Material quality:

Hydraulic / Base

1 Runoccupied

2 R 1.4404 / 1.4408 (AISI 316 L)

3 R 1.4301 / GG25 (coated)

maximum permissible working

pressure [bar] PN 16 or PN 25

EPDM seals (KTW/WRAS)

VITON seals

Main voltage 3 ~ 400 V

3 ~ 230 V

50 Hz or 60 Hz frequency

2- or 4-pole motor

Manufacturer’s key

2Safety

These instructions contain important information which must be

followed when installing and operating the pump. These operating

instructions must therefore be read before assembly and commis-

sioning by the installer and the responsible operator. Both the general

safety instructions in the “Safety precautions” section and those in

subsequent sections indicated by danger symbols should be carefully

observed.

2.1Danger symbols used in these operating instructions

Safety precautions in these operating instructions which, if not

followed, could cause personal injury are indicated by the symbol:

when warning of electrical voltage with

The following symbol is used to indicate that by ignoring the relevant

safety instructions, damage could be caused to the pump/machinery

and its functions:

2.2 Staff training

The personnel installing the pump must have the appropriate qualifica-

tions for this work.

2.3 Risks incurred by failure to comply with the safety precautions

Failure to comply with the safety precautions could result in personal

injury or damage to the pump or installation. Failure to comply with the

safety precautions could also invalidate any claim for damages.

In particular, failure to comply with these safety precautions could give

rise, for example, to the following risks:

–Failure of important pump or machinery functions,

–Personal injury due to electrical, mechanical and bacteriological

causes.

–Damage to property.

WARNING!

2.4 Safety precautions for the operator

Existing regulations for the prevention of accidents must be followed.

Dangers caused by electrical energy are to be excluded. Directives

issued by the VDE [German Association of Electrical Engineers] and

the local electricity supply companies are to be observed.

2.5 Safety information for inspection and assembly

The operator is responsible for ensuring that inspection and assembly

are carried out by authorised and qualified personnel who have

studied the operating instructions closely.

Work on the pump/machinery should only be carried out when the

machine has been brought to a standstill.

2.6 Unauthorized modification and manufacture of spare parts

Changes to the pump/machinery may only be made in agreement with

the manufacturer. The use of original spare parts and accessories

authorised by the manufacturer will ensure safety. The use of any other

parts may invalidate claims invoking the liability of the manufacturer for

any consequences.

2.7 Improper use

The operating safety of the pump or installation supplied can only be

guaranteed if it is used in accordance with paragraph 1 of the operat-

ing instructions. The limiting values given in the catalogue or data

sheet must neither be exceeded nor allowed to fall below those speci-

fied.

3Transport and storage

During transport and in storage the pump must be

protected against moisture, frost and mechanical

damage. The pump unit is to be transported with the shaft horizontal.

When storing, ensure that the pump unit cannot overturn as a result of

top-heaviness.

4Product and accessory description

4.1The pumps

The pump is a multistage (1–16 stages) normal suction vertical high

pressure centrifugal pump with an in-line design, i.e. the inlet and out-

let pressure glands are in a line. The pump is available in 2 pressure

versions, PN 16 and PN 25 with integrally cast circular flanges.

The pump (Fig. 1) stands on a grey cast iron pump footplate which

serves as a fixing base (13). The stage casings (4) are in a multiple

modular construction. The impellers (10) are fitted on a single shaft

(11). The pressure casing (5) guarantees a fail-safe seal.

All parts that come into contact with the medium, such as stage hous-

ings, impellers and pressure casings are made of chromium nickel

steel, the pump footplate (Pos. 12) with flanges (Pos. 6) of coated

GG 25 (up to 85 °C) or of chromium nickel steel (on request). The shaft

hole through the pump casing is sealed with an axial face seal (3).

MVI32C, MVI52C, MVI70 and MVI95 are equipped

with a cartridge system in order to ease standard

mechanical seal replacement without disassemb-

ling the hydraulic parts.

“Spacer” feature allows not to disassemble motor on MVI32C,

MVI52C, MVI70 and MVI95 when removing mechanical seal cartridge.

The pump and motor shafts are linked together by a clutch (9). All

parts of the drinking water version (version E) which are in contact with

the fluid have been cleared by KTW and WRAS and are therefore sui-

table for use with drinking water.

The speed of the pump can be controlled when connected to a

frequency converter (see paragraph 5.3).

4.2 Products delivered

–high pressure centrifugal pump

WARNING!

ENGLISH

–Installation and operating instructions

4.3 Accessories

see catalogue or data sheet

5Assembly/Installation

–See the rating plate of the pump and the rating plate of the motor

5.1Assembly

Assembly should only take place once all welding

and soldering work and the rinsing of the pipe net-

work has been completed. Dirt will damage the pump.

–Install the pump in a dry place free of frost.

–Install in a horizontal and flat position. If the pump is positioned on

an incline the bearing will wear more quickly.

–Install the pump in an easily accessible place to facilitate inspection

and disassembly. Always install the pump exactly perpendicular on a

sufficiently heavy concrete base (Fig. 2, 3). Fit a vibration absorber

between the base and the floor.

–Dimensions for installation and connections are given in Paragraph

1.2.1, Table 2 and in Fig. 3.

–In the case of heavy pumps fit a hook (Fig. 2, Pos. 12) or eye with a

suitable load-bearing capacity (total weight of pump: see catalogue/

data sheet) vertically above the pump, to which a hoist or similar

device can be attached when maintaining or repairing the pump.

Allow for a free size when completed of min. 200 mm.

–The arrow on the pump casing indicates the direction of flow.

–Fit the inlet and outlet pipes without stress. Install below expansion

joints of restricted length to absorb vibrations. The pipes must be

attached (Fig. 2, 7) in such a way that the pump does not bear the

weight of the pipes.

–Isolation mechanisms (Fig. 2, 2 & 3) must in principle be installed in

front of and behind the pump to avoid having to empty and refill the

whole installation when inspecting or changing the pump.

– To avoid pressure loss it is recommended that you choose as short

an inlet pipe as possible, choose a nominal width for the suction

pipe which is larger by a nominal width than the pump connection

and avoid constrictions caused by bends and valves.

–A backflow preventer (Fig. 2, 4) should be fitted in the outlet pipe.

–For differential pressures > 6 bar the backflow preventer (Fig. 2,

Pos. 4) is to be fitted in the suction pipe. It is not required at the

outlet.

–The axial face seal should be protected against dry running. An inlet

pressure gauge or level gauge should be installed by the customer.

–If the pump is to be connected indirectly via a reservoir, a suction

strainer (Fig. 2, 8) must be provided in the inlet pipe by the customer

to prevent coarse impurities entering the pump.

– With limited nominal pressure PN, ensure that this pressure is pro-

duced from the inlet pressure and the zero flow level:

P Inlet ≤PN - Pmax pump

–For gaseous or hot pumping media a bypass pipe is to be fitted to

the pump (Fig. 2, Pos. BP), (accessory).

5.2 Electrical connection

Electrical connection should be made by a qualified electri-

cian. Current national regulations must be observed (e.g.

VDE regulations in Germany).

WARNING!

–Check that the mains current and voltage comply with the data on

the rating plate.

–Pump/installation must be earthed in compliance with regulations.

–All motors must be fitted with a motor safety switch by the customer

to prevent the motor from overheating.

Adjusting the motor safety switch:

Direct starting current: Adjust to nominal current of the motor in

accordance with the data on the motor rating plate.

Y-∆-start: If the motor safety switch is connected as a star or triangu-

lar safety circuit combination at the supply line it can be adjusted in the

same way units operating on direct starting current. If the motor safety

switch is connected to the motor supply line in phase (U1/V1/W1 or

U2/V2/W2), then the motor safety switch should be adjusted to the

value of 0.58 of the nominal motor current.

–The mains cable can be inserted to the left or the right of the termi-

nal box. Open the appropriate hole by removing the moulded cover,

unscrew the PG connector and push the cable through the PG

connector.

–The supply cable must be protected against the effects of heat and

vibrations which may come from the motor or the pump.

–When using the pump in machinery where the water temperature

exceeds 90 °C, a connecting pipe with corresponding heat

resistance must be used.

–Connections to the mains must be carried out in accordance with

the plan of terminal connections for rotary or alternating current in

the terminal box of the pump (Fig. 4).

–The terminal box can be better positioned by rotating the motor

through steps of 90°. To this end the connecting screws (Fig. 1,

Pos. 1) of the lantern (Fig. 1, Pos. 8) and motor flange are to be

loosened.

In the case of internal connecting screws the clutch guard (Fig. 1,

Pos. 2) is to be removed beforehand. When assembling the clutch

guard, do not forget to tighten the safety screw.

5.3 Operation with frequency converter

The speed of the pump can be controlled when connected to a

frequency converter.

See Installation and Operating Instructions of the frequency converter

for connection and operation.

The frequency converter may not generate a speed due to increased

voltage greater than 2500 V/µs and voltage peaks û > 1000 V, as

otherwise the motor coil will be destroyed. If such speeds due to the

increased voltage are possible, an LC filter (motor filter) should be

installed between the frequency converter and the motor.

6Commissioning

In order to protect the axial face seal, the pump

must not run dry.

–Close both isolating valves and open the vent screw (Fig. 2, 5) by

one and a half or two turns.

–Slowly open the isolating valve (Fig. 2, 2) at the inlet until the air has

escaped from the vent screw and the fluid to be pumped comes

out. The escaping air will be clearly heard hissing. Tighten the vent

screw.

–Slowly open the isolating valve at the outlet (Fig. 2, 3). The mano-

meter installed at the outlet should be checked for any possible

pressure instabilities, indicated by a flickering manometer pointer. If

the pressure is unstable, allow more air to escape.

When the temperature of the liquid being pumped is high

and the system is pressurised, any flow escaping from the

vent screw can cause scalding and injuries. The vent

screw should therefore be loosen only slightly.

–When used for the first time, if it is to be used to pump drinking

water the system must be flushed through, so that any dirty water

present will not contaminate the drinking water supply.

–Checking the direction of rotation (only for rotary current motors):

Check that the pump rotates in the same direction indicated by the

arrow on the pump casing by switching on for a short time. If this is

not the case, interchange 2 phases in the terminal box.

WARNING!

ENGLISH

On pumps equipped with greaser under bearing box (table below), see

greasing instructions written on sticker put on it:

For pumps equipped with coupling bush, check it

before reassembling.

For pumps with a star or triangular circuit starting current, the

connections of two coils must be interchanged, e.g. U1 with V1 and

U2 with V2.

–If the fluid temperature is too high, steam may form which may

damage the pump. The pump must therefore not run with the valve

closed for longer than 10 minutes when pumping cold water or for

longer than five minutes when pumping fluid where > 60°C.

We recommend that the flow rate does not drop to below 10% of

the nominal flow rate so as to avoid a build up of steam in the pump.

–If there is a build up of steam, this should be allowed to escape by

carefully opening the vent screw.

Both pump and motor can reach operating temperatures

> 100 °C. Therefore exercise caution when touching the

pump.

7Maintenance

Before carrying out any maintenance work, switch off the

pump and ensure that it cannot be switched on again by

unauthorised people. Never carry out work on a running

pump.

–During the running-in period, there may be some dripping from the

axial face seal. In the event of a serious leak as a result of heavy

wear have the mechanical seal replaced by a specialist.

–Increased bearing noise and unusual vibrations indicate a worn

bearing. In this case, have the bearing replaced by a specialist.

–If the pump is exposed to frost, the pump and pipework must be

emptied in the cold season. Close the isolating valve and open the

drain valve (Fig. 2, 6) and the vent screw (Fig. 2, 5) of the pump.

The isolating valve must be closed before the drain valve is

opened.

– If placed in a frost-free location, the pump does not have to be emp-

tied, even if it is out of service for a long period.

Type

< 22 kW

22 kW

✔

✔ ✔

✔

30 kW 37 kW 45 kW

MVI 16

MVI 32

MVI 52

MVI 70

MVI 95

ENGLISH

8Problems, Causes and Solutions

Problem

Pump does not run

Pump runs but does not pump

Pump does not pump evenly

Pump vibrates and is noisy

Motor overheats

motor cut-out activates

Cause

no power

motor safety switch activated

Incorrect direction of rotation

pipe or pump components blocked by

foreign body

air in inlet pipe

inlet pipe too narrow

valve not sufficiently open

air in the pump

foreign body in the pump

pump not properly fixed to the base

bearing damaged

one phase interrupted

pump sluggish:

foreign body

bearing damaged

ambient temperature too high

Solutions

check fuses, cables and connections

Eliminate motor overload

check direction of rotation and correct if necessary

Check and clean pipe and pump

Seal inlet pipe

fit a larger inlet pipe

open valve

bleed the pump

remove foreign body

tighten anchor bolts

consult customer services

check fuses, cables and connections

clean pump

have pump repaired by customer services

provide cooling

If the fault cannot be remedied, please contact your plumbing and heating specialist or your nearest WILO customer services or

representative.

Subject to technical alterations!

WILO AG

Nortkirchenstraße 100

44263 Dortmund

Germany

T +49 231 4102-0

F +49 231 4102-7363

www.wilo.com

Azerbaijan

370141 Baku

T +994 50 2100890

F +994 12 4975253

Wilo MultiVert MVI 16 Series User manual

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