Homa Ams series User manual

Installation, Operation, and

Maintenance Manual

AMS ...

AM(X)...

AV(X) ...

AK(X) ...

Version 11/2021- No. 00507610.01

02 | ENGLISH

Content

1.2. Preface ..............................................................................................................................................................03

1.3. Proper use.........................................................................................................................................................03

1.4. Copyright...........................................................................................................................................................03

1.5. Technical terms..................................................................................................................................................03

2. Safety.................................................................................................................................03

2.1. Instructions and safety information...................................................................................................................03

2.2. General safety...................................................................................................................................................04

2.3. Operating personnel.........................................................................................................................................04

2.4. Electrical work ..................................................................................................................................................04

2.5. Operating procedure.........................................................................................................................................05

2.6. Safety and control devices................................................................................................................................05

2.7. Operation in an explosive atmosphere..............................................................................................................05

2.8. Sound Safety.....................................................................................................................................................05

2.9. Pumped fluids ..................................................................................................................................................06

2.10. Danger due to spark generation .....................................................................................................................06

3. General description ..........................................................................................................06

3.1. Application.........................................................................................................................................................06

3.2. Types of use......................................................................................................................................................06

3.3. Construction .....................................................................................................................................................06

4. Package,Transport, Storage .............................................................................................09

4.1. Delivery .............................................................................................................................................................09

4.2. Transport ...........................................................................................................................................................09

4.3. Storage .............................................................................................................................................................09

5. Installation and initial commissioning ........................................................................... 10

5.1. General.............................................................................................................................................................. 10

4.4. Returning to the supplier ................................................................................................................................. 10

5.2. Installation ........................................................................................................................................................ 11

5.3. Use of chains.................................................................................................................................................... 13

5.4. Initial operation ................................................................................................................................................. 14

5.5. Preparatory work .............................................................................................................................................. 14

5.7. Direction of rotation........................................................................................................................................... 16

5.8. Motor protection............................................................................................................................................... 16

5.9. Variable Frequency Drives................................................................................................................................. 16

5.10. Types of startups ............................................................................................................................................. 16

6. Maintenance...................................................................................................................... 17

6.1. General.............................................................................................................................................................. 17

6.2. Maintenance intervals ...................................................................................................................................... 17

6.3. Maintenance tasks ........................................................................................................................................... 17

6.4. Sealing chamber ............................................................................................................................................... 19

7. Repairs ...............................................................................................................................19

7.1. General .............................................................................................................................................................. 19

7.2. Changing the impeller and volute...................................................................................................................... 19

7.3. Spare Parts ........................................................................................................................................................ 19

8. Shutdown..........................................................................................................................20

8.1. Temporary shutdown.........................................................................................................................................20

8.2. Final shutdown / storage ..................................................................................................................................20

8.3. Restarting after an extended period of storage ................................................................................................20

9.Troubleshooting ................................................................................................................20

10. Connection of pumps and mixers .................................................................................23

ENGLISH | 03

1.2. Preface

Dear Customer,

Thank you for choosing one of our company’s products.

You have purchased a product which has been manufac-

tured to the latest technical standards. Read this operat-

ing and maintenance manual carefully before first use in

order to ensure that the product is used safely. The docu-

mentation contains all the necessary specifications for the

product, allowing you to use it properly. In addition, you

will also find information on how to recognize potential

dangers, reduce repair costs and downtime, and increase

the reliability and working life of the product. All safety

requirements and specific manufacturer’s requirements

must be fulfilled before the product is put into operation.

This operating and maintenance manual supplements any

existing national regulations on industrial safety and acci-

dent prevention. This manual must also be accessible to

personnel at all times and also be made available where

the product is used.

1.3. Proper use

In the event of improper use, there is a danger to life for

the user as well as for third parties. Additionally, the prod-

uct and/or attachments may be damaged or destroyed.

It is important to ensure that the product is only operated

in good condition and as intended. To do so, follow the op-

erating instructions. The pumps can be used in the range

specified by the manufacturer, in accordance with the cur-

rent HOP.SEL version. Please note that the offered pumps

may only be used in the defined field of application. Op-

erating the pump outside the application range can lead

to operational problems or significant damage to the unit.

1.4. Copyright

This operation and maintenance manual has been copy-

righted by the manufacturer. This operation and mainte-

nance handbook is intended for use by assembly, oper-

ating and maintenance personnel. It contains technical

specifications and diagrams which may not be reproduced

or distributed, either completely or in part, or used for any

other purpose without the expressed consent of the man-

ufacturer.

1.5.Technical terms

Various technical terms are used in this operating and

maintenance manual.

Dry run

The product is running at full speed, however, there is no

liquid to be pumped. A dry run is to be strictly avoided. If

necessary, a safety device must be installed.

“wet” installation type

This installation type requires the product to be immersed

in the pumped fluid. It is completely surrounded by the

pumped fluid. Please observe the values for the maximum

submersion depth and the minimum water coverage.

“dry” installation type

In this installation type, the product is installed dry, i.e. the

pumped fluid is delivered to and discharged via a pipeline

system.The product is not immersed in the pumped fluid.

Please note that the surfaces of the product become very

hot!

“transportable” installation type

With this installation type the product is equipped with a

pedestal. It can be installed and operated at any location.

Please observe the values for the maximum submersion

depth and the minimum water coverage, and remember

that the surfaces of the product become very hot.

“S1” operating mode (continuous operation)

At the rated load, a constant temperature is reached that

does not increase even in prolonged operation. The oper-

ating equipment can operate uninterruptedly at the rated

load without exceeding the maximum permissible tem-

perature.

Operating mode “S3“ (intermittent operation):

For this operating mode, after the abbreviation, the per-

cent duty cycle is displayed, as well as the cycle duration if

it is greater than 10 minutes. For example S3 40% means

the pump can operate continuously for 40% (24 minutes)

of one hour, and must then pause for 36 minutes.

Low Level Lockout

The low level lockout is designed to automatically shut

down the product if the water level falls below the min-

imum water coverage value of the product. This is made

possible by installing a float switch.

Level control

The level control is designed to switch the product on or

off depending on the water level. This is made possible by

installing a float switch.

2. Safety

This chapter lists all the generally applicable safety in-

structions and technical information. Additionally, other

chapters contain specific safety instructions and techni-

cal information. All instructions and information must be

observed and followed during the various phases of the

product‘s lifecycle (installation, operation, maintenance,

transport etc.). The operator is responsible for ensuring

that personnel follow these instructions and guidelines.

2.1. Instructions and safety information

This manual uses instructions and safety information for

preventing injury and damage to property.

To make this clear for the personnel, the instructions and

safety information are distinguished as follows:

Each safety instruction begins with one of the following

signal words:

Danger: Serious or fatal injuries can occur!

Warning: Serious injuries can occur!

Caution: Injuries can occur!

Caution (Instruction without symbol): Serious damage

to property can occur, including irreparable damage!

04 | ENGLISH

Safety instructions begin with a signal word and descrip-

tion of the hazard, followed by the hazard source and

potential consequences, and end with information on

preventing it.

2.2. General safety

• Never work alone when installing or removing the

product.

• The machine must always be switched off before

any work is performed on it (assembly, dismantling,

maintenance, installation). The machine must be dis-

connected from the electrical system and secured

against being switched on again. All rotating parts

must be at a standstill.

• The operator should inform his/her superior immedi-

ately should any defects or irregularities occur.

• It is of vital importance that the system is shut down

immediately by the operator if any problems arise

which may endanger safety of personnel. Problems

of this kind include:

• Failure of the safety and/or control devices

• Damage to critical parts

• Damage to electric installations, cables and

insulation.

• Tools and other objects should be kept in a place

reserved for them so that they can be found quickly.

• Sufficient ventilation must be provided in enclosed

rooms.

• When welding or working with electronic devices, en-

sure that there is no danger of explosion.

• Only use fastening devices which are legally defined

as such and officially approved.

• The fastening devices should be suitable for the

conditions of use (weather, hooking system, load,

etc). If these are separated from the machine after

use, they should be expressly marked as fastening

devices. Otherwise they should be carefully stored.

• Mobile working equipment for lifting loads should

be used in a manner that ensures the stability of the

working apparatus during operation.

• When using mobile working equipment for lifting

non guided loads, measures should be taken to avoid

tipping and sliding etc.

• Measures should be taken that no person is ever

directly beneath a suspended load. Furthermore,

it is also prohibited to move suspended loads over

workplaces where people are present.

• If mobile working equipment is used for lifting loads,

a second person should be present to coordinate the

procedure if needed (for example if the operator‘s

field of vision is blocked).

• The load to be lifted must be transported in such a

manner that nobody can be injured in the case of

a power cut. Additionally, when working outdoors,

such procedures must be interrupted immediately if

weather conditions worsen.

These instructions must be strictly observed.

Non-observance can result in injury or serious

damage to property. This product may contain chem-

icals known to the State of California to cause cancer

and birth defects or other reproductive harm. www.

p65warnings.ca.gov

Ces instructions doivent être strictement respectées.

Le non-respect de cette consigne peut entraîner des

blessures ou des dommages matériels importants.

Ce produit peut contenir des produits chimiques con-

nus dans l‘État de Californie pour provoquer des can-

cers et des malformations congénitales ou d‘autres

problèmes de reproduction. www.p65warnings.

ca.gov

2.3. Operating personnel

All personnel who work on or with the product must be

qualified for such work; electrical work, for example may

only be carried out by a qualified electrician. The entire per-

sonnel must be of age.

Operating and maintenance personnel must also work ac-

cording to local accident prevention regulations. It must

be ensured that personnel have read and understood the

instructions in this operating and Maintenance handbook;

if necessary this manual must be ordered from the manu-

facturer in the required language.

2.4. Electrical work

Our electrical products are operated with alter-

nating or industrial high-voltage current. The local

regulations (e.g. 2017 NEC) must be adhered to.

The technical specifications must be strictly ad-

hered to. If the machine has been switched off by a

protective device, it must not be switched on again until

the error has been corrected.

Beware of electrical current!

Incorrectly performed electrical work can result in

fatal injury! This work may only be carried out by a

qualified electrician.

Attention au courant électrique !

Des travaux électriques incorrectement effectués

peuvent entraîner des blessures mortelles ! Ce tra-

vail ne doit être effectué que par un électricien qual-

ifié.

Beware of Moisture!

Moisture penetrating into cables can damage them

and render them useless. Additionally, water can

penetrate into the terminal compartment or motor

and cause damage to the terminals or the winding.

Never immerse cable ends in the pumped fluid or

other liquids.

Attention à l‘humidité !

L‘humidité qui pénètre dans les câbles peut les en-

dommager et les rendre inutilisables. De plus, l‘eau

peut pénétrer dans le compartiment des bornes ou

dans le moteur et endommager les bornes ou le bobi-

nage. Ne jamais immerger les extrémités des câbles

dans le fluide pompé ou dans d‘autres liquides.

ENGLISH | 05

2.4.1. Electrical connection

When the machine is connected to the electrical control

panel, especially when electronic devices such as soft

startup control or frequency drives are used, the relay

manufacturer‘s specifications must be followed in order

to conform to EMC. Special separate shielding measures

e.g. special cables may be necessary for the power supply

and control cables.

The connections may only be made if the equipment

meets NEC standards. Mobile radio equipment may cause

malfunctions.

Beware of electromagnetic radiation!

Electromagnetic radiation can pose a fatal risk for

people with pacemakers. Put up appropriate signs

and make sure anyone affected is aware of the

danger.

Attention aux rayonnements électromagnétiques !

Les rayonnements électromagnétiques peuvent con-

stituer un risque mortel pour les personnes portant

un stimulateur cardiaque. Placez des panneaux ap-

propriés et assurez-vous que toute personne con-

cernée est consciente du danger.

2.4.2. Ground connection

Our products (machine including protective devices and

operating position, auxiliary hoisting gear) must always be

grounded. If there is a possibility that people can come

into contact with the machine and the pumped liquid (e.g.

at construction sites), the grounded connection must be

additionally equipped with a fault current protection de-

vice. The electrical motors conform to motor protection

class IP 68 in accordance with the valid norms.

2.5. Operating procedure

When operating the product, always follow the locally

applicable laws and regulations for work safety, accident

prevention and handling electrical machinery. To help to

ensure safe working practice, the responsibilities of em-

ployees should be clearly set out by the owner. All per-

sonnel are responsible for ensuring that regulations are

observed. Certain parts such as the rotor and impeller ro-

tate during operation in order to pump the fluid. Certain

materials can cause very sharp edges on these parts.

Beware of rotating parts!

The moving parts can crush and sever limbs. Never

reach into the pump unit or the moving parts during

operation. Switch off the machine and let the moving

parts come to a rest before maintenance or repair

work!

Attention aux pièces en rotation !

Les pièces mobiles peuvent écraser et trancher des

membres. Ne jamais mettre les mains dans l‘unité

de pompage ou dans les parties mobiles pendant le

fonctionnement. Avant toute opération d‘entretien

ou de réparation, éteignez la machine et laissez les

pièces mobiles s‘arrêter !

2.6. Safety and control devices

Our products are equipped with various safety and con-

trol devices.These include, for example, moisture sensors

and temperature sensors. These devices must never be

dismantled or disabled. Equipment such as thermo sen-

sors, float switches, etc. must be checked by an elec-

trician for proper functioning before start-up (see the

“Electrical Connection” data sheet). Please remember

equipment such as PT100 temperature monitors or float

switches require the use of a HOMA GO switch for con-

nection. Please contact your HOMA distributor for infor-

mation.Personnel must be informed of the installations

used and how they work.

Caution!

Never operate the machine if the safety and monitor-

ing devices have been removed or damage, or if they

do not work.

Mise en garde!

Ne jamais utiliser la machine si les dispositifs de

sécurité et de contrôle ont été retirés ou endom-

magés, ou s‘ils ne fonctionnent pas.

2.7. Operation in an explosive atmosphere

Products marked as FM approved for suitable operation in

in an explosive atmosphere, are designed for Class I, Divi-

sion 1, Groups C and D and Temperature class T4. The per-

mitted ambient temperature is between -4°F and 104°F.

The enclosure’s protection class is IP68. The products

must meet certain guidelines for this type of use. Certain

rules of conduct and guidelines must be adhered to by

the operator as well. Products that have been approved

for operation in an explosive atmosphere are marked as

explosion-proof rated by FM. In addition, an “FM” symbol

must be included on the name plate!

2.8. Sound Safety

Depending on the size and capacity (kW), the products

produce a sound pressure of up to110 dB. The actual

sound pressure, however, depends on several factors.

These include, for example, the installation type (wet, dry,

transportable), fastening of accessories (e.g. suspension

unit) and pipeline, operating site, immersion depth, etc.

Once the product has been installed, we recommend that

the operator make additional measurements under all op-

erating conditions.

Caution: Wear ear protectors!

In accordance with the laws in effect, guidelines,

standards and regulations, ear protection must be

worn if the sound pressure is greater than 85 dB (A)!

The operator is responsible for ensuring that this is

observed!

Mise en garde : Portez des protecteurs auditifs !

Conformément aux lois en vigueur, aux directives,

aux normes et aux règlements, le port de protecteurs

d‘oreilles est obligatoire si la pression acoustique est

supérieure à 85 dB (A) ! L‘opérateur est responsable

du respect de cette consigne !

06 | ENGLISH

2.9. Pumped ﬂuids

Each pumped fluid differs in regard to composition, cor-

rosiveness, abrasiveness, TS content and many other

aspects. Generally, our products can be used for many

applications. For more precise details, see chapter 3, the

machine data sheet and the order confirmation. It should

be remembered that if the density, viscosity or the general

composition change, this can also alter many parameters

of the product. Different materials and impeller shapes

are required for different pumped fluids. The more exact

your specifications on your order, the more exactly we can

modify our product to meet your requirements.

If the area of application and/or the pumped fluid change,

we will be happy to offer supportive advice.

When switching the product into another pumped fluid,

observe the following points:

• Products which have been operated in sewage or

waste water must be thoroughly cleaned with pure

water or drinking water before use.

• Products which have pumped fluids which are haz-

ardous to health must always be decontaminated be-

fore changing to a new fluid. Also clarify whether the

product may be used in a different pumped fluid.

• With products which have been operated with a

lubricant or cooling fluid (such as oil), this can escape

into the pumped fluid if the mechanical shaft seal is

defective.

Danger - explosive fluids!

It is absolutely prohibited to pump explosive liquids

(e.g. gasoline, kerosene, etc.). The products are not

designed for these liquids!

Danger - fluides explosifs !

Il est absolument interdit de pomper des liquides

explosifs (par exemple, de l‘essence, du kérosène,

etc.). Les produits ne sont pas conçus pour ces liq-

uides !

2.10. Danger due to spark generation

Mechanically generated sparks can ignite flammable gas-

es and condensates. According to EN1127-1 Para.6.4.4,

sparks must also be excluded for category 2 in normal

operation. In normal operation no spark generation is pos-

sible due to fluid covering (medium covering of the pump

hydraulic).The ingress or suction of foreign bodies (stones,

pieces of metal, etc.) through the suction nozzles into the

pump hydraulic is not possible in an expected case of mal-

function in which the enclosure fails as the pump cannot

suck up pumping medium nor its containing solids. In the

ventilated shaft, the explosion-protected submersible mo-

tor pumps are drained via a drain system with two guide

tubes of galvanized steel, between their guide claws of

grey cast iron that guide into the automatic coupling ar-

rangement. The guide velocity, with max 0.1 m/s (10cm/s)

is so low that no sparks can be generated even in the

most disadvantaged conditions. In the first installation,

the guide claws of the drain arrangement should be lubri-

cated with ball bearing grease in order to suppress heat

and spark generation in the most disadvantaged case.

3. General description

3.1. Application

Pump is suitable for pumping sewage, effluents, sludge

and surface water. The pumps are used for installations in

public and private sector, trade and industry. The pumps

can convey abrasive medium as surface water. For highly

abrasive content, such as concrete-gravel and sand in the

medium, it is necessary to protect the impeller and pump

housing against excessive abrasion or to shorten the

maintenance interval. Before the pumping of chemically

aggressive liquids, the resistance of the pump materials

must be checked. The pumps are available in high quality

materials of all components (Stainless steel, bronze).

According to the type of installation and motor cool-

ing, the machine must be submerged in pumped liq-

uid at least up to the top edge of the pump or mo-

tor housing. For continuous operation (S1) without a

cooling jacket, the motor housing must completely be

submerged.

The temperature of the pumped medium may be up to

104°F or up to 140°F for a short period.The maximum den-

sity of the medium is 0.03757 lbs/in³ and the pH may be

from 6 – 11. Stainless steel variants can be used at a pH of

4 - 14. However, the pH alone only serves as a guideline.

Consult factory for assistance with chemically aggressive

liquids. Depending on the composition, it may be neces-

sary to use special sealing materials.

3.2.Types of use

The motors are designed for continuous operation (S1),

maximum 15 starts per hour. The hydraulic is designed for

permanent operation, e.g. supply of industrial water.

3.3. Construction

The major pump components consist of the motor hous-

ing, volute, and impeller.















ENGLISH | 07

No. Description

1 Eye hooks for lifting

2 Name plate

3 Volute

4 Suction inlet

5 Discharge

6 Motor housing

7 Cable entry

3.3.1. Name plate











  













Thermally protected! See manual for cord replacement!

Do not remove covers while circuits are alive!

APPROVED

Flow max.:

Sn:

Pump:

Cont. Duty: 40° C amb.

Hmax: ft Hmin: ft lbs

gpm

rpm

Motor:

Ins. cl.:

U: V

cos φ:

Nema code:

Wiring Diagram:

Cl.I,DIV.1,GR.CD

I:Date:

IP 68

Operating Mode:

No. Description

aPump name

bSerial number

cFlow max

dHmax (Head max)

eHmin (Head min)

fSubmersion depth

gWeight

hMotor name

iDate of manufacture

jVoltage

kMotor Power

lNominal current

mFrequency

m aPhase

nMotor speed

o Cos phi

pTemperature class

qNema Code Letter

rWiring diagram

sInsulation class

t Operating mode

21 Comments

3.3.2. Motor

The pump motor consists of the stator and shaft with

impeller assembly. The cable for the power supply is de-

signed for maximum mechanical performance in accor-

dance with the characteristic or pump name plate. Both

the cable entries and the cable are water-pressure tight to

the depth provided on the name plate. The shaft bearing

assembly is supported via robust, maintenance-free and

permanently lubricated roller bearings.

All motors can also be delivered in an explosion-proof ver-

sion in accordance with FM Class I, Division 1, Groups C

& D.

General motor data

Service factor 1.15

Operating mode S1

Operating mode at 208V

only if a 208Vmotor was

ordered

S3 42% 60min

Max. liquid temperature 35°C / 95°F

Insulation class H (180°C / 356°F)

Degree of protection IP68

Cable length 32 ft

Rotor shaft seal Silicon-carbide / Silicon-carbide

Mechanical shaft seal Silicon-carbide / Silicon-carbide

Bearing One grooved ball bearing (above),

double-row type angular ball bearing

(below)

3.3.3. Monitoring Equipment

The unit is equipped with various types of monitoring-safe-

ty equipment. The following table shows an overview of

the options available. The options may vary depending on

the size of the pressure outlet

Motortype Motorversion

.../C Temperature monitoring in the winding, Oil chamber

seal conditions sensor

…U... Jacket cooled motor, Temperature monitoring in the

winding, Oil chamber seal conditions sensor

…L... Jacket cooled motor, closed liquid cooling,

Temperature monitoring in the winding, Seal probe

leakage chamber

...FM Temperature monitoring in the winding, Explosion

proof

.../C FM Temperature monitoring in the winding, Oil chamber

seal conditions sensor and motor connecting chamber,

Explosion proof

…U... FM Jacket cooled motor, Temperature monitoring in the

winding, Oil chamber seal conditions sensor,

Explosion proof

Temperature Sensor

All pumps are equipped with a temperature sensor in

each motor winding. In standard pumps, the connections

for the temperature sensor are fed via the power cable to

the outside and are to be connected in the electric con-

trol box using the T1 and T3 power cable endings in such

a way that the motor automatically restarts after it has

cooled down.

Instead of the standard sensor, the explosion-proof ver-

sions are equipped with a temperature sensor assembly

that has a higher activation temperature. This is to be

connected via the power cable endings T1 and T2 in such

a way that after activation, a manual reset is necessary

to restart the pump. The temperature sensor assembly

must be connected in the control panel so that it switches

off when it overheats.

08 | ENGLISH

Switch-off temperature of the sensors:

MotorMotor

FrameFrame

Stator WindingStator Winding

T1+T3T1+T3

RegulatorRegulator

StatorStator

Winding FMWinding FM

T1+T2 LimiterT1+T2 Limiter

LowerLower

BearingBearing

UpperUpper

BearingBearing

T 140°C / 284°F 140°C / 284°F 80°C /

176°F

n/a

P 150°C / 302°F 140°C / 284°F 80°C /

176°F

n/a

F 150°C / 302°F 140°C / 284°F 90°C /

194°F

105°C /

221°F

G 150°C / 302°F 150°C / 302°F 90°C /

194°F

105°C /

221°F

H 150°C / 302°F 150°C / 302°F 90°C /

194°F

105°C /

221°F

Seal monitoring:

In case of a leak in the lower shaft seal, water enters

the oil chamber and changes the resistance of the oil.

The conductivity of the oil is monitored via one sensor to

ground. In the motor housing, another sensor monitors

for the resistance to ground in case of water intrusion.The

sensors are to be connected via 2 cables (consult wiring

diagram) from the pump connection cables in the control

panel to a monitor galvanically separated from the probe

circuit. The response sensitivity should be adjustable from

0-100 kΩ, the standard setting being 50 kΩ.

FM pumps: The sensors are connected via 2 cables (la-

belled S1 and S2) of the pump connector cable in the

switching system to an evaluation device with an electri-

cally isolated special circuit.

Seal monitoring for pumps with closed-loop cooling:

The penetration of coolant (water-glycol mixture) into a

leakage chamber is registered via 2 sensors. This leakage

chamber is situated between the motor-side mechanical

seal and the bottom shaft bearing. If the motor-side shaft

bearing should leak, coolant leaks into the leakage cham-

ber and establishes the contact between both sensors.

The sensors are to be connected via 2 cables (labeled S11

and S12) from the pump connection cables in the switch

cabinet to an evaluation instrument galvanically separated

from the probe circuit.

3.3.4. Additional pump protection devices

Several optional pump protection devices are available to

protect submersible motors from damage, and may have

provided in your pump.

Temperature Sensing RTD*: PT100 sensors are avail-

able in two critical locations on larger machines, the lower

bearings and motor windings. N.C. Circuit- 108 ohm

Moisture Sensors: Two styles of moisture sensors are

available on HOMA pumps.

Moisture Detectors*: These are micro float switches de-

signed to detect small amounts of liquid. These are avail-

able in the stator housing of 50hp and larger size pumps.

N.C. Circuit- 268 ohm

Leakage Detectors*: These normally open, 2 wire probes

are used to detect the presence of water in the pump.

Optional leak detectors can be installed as follows:

• Stator Chamber installation: Probe placed in bottom

of stator housing to detect presence of water in the

chamber.

• Stator or Motor cap installation: Probe used to detect

the presence of water only into the stator housing or

motor cap terminal board.

• Closed loop cooling Installation: Probe placed in sta-

tor housing to detect the presence of liquid in the dry

chamber.

* GO switch is required for sensor operation.

3.3.5. Sealing / Seal Housing

Sealing is accomplished by two silicon carbide mechani-

cal seals in a tandem arrangement, acting independently

from each other. The seal housing is situated between the

motor and the pump housing. It consists of the bearing

housing and the pressure cover, which together form the

sealing cavity with containing white mineral oil. Monitor-

ing possibilities are available using the inspection plug on

the bearing housing and optional electronic monitoring.

3.3.6. Jacketed Pump Option

The cooling jacket has been supplied based upon the

specified operating conditions of this application. It is im-

portant this jacket is functioning properly, or the internal

motor components could become damaged. Several cool-

ing configurations are available depending upon custom-

er preference and system requirements. You must know

what configuration of cooling system is to be used with

the pump prior to installation. In some cases, field test re-

sults may indicate a change of cooling method is required.

Consult factory for necessary changes to the pump.

COOLING REQUIREMENTS

1 - Standard Media Cooled –

This construction does not require any external piping and

it is completely self-contained. This design is suitable for

the routine collection system application. No pump modi-

fications are required.

• Required Hardware – Automatic air bleed valve

mounted in upper vent port or a ¼” or 3/8” elbow and

small block valve for venting. A length of hose routed

to the sump should be attached to either air bleed or

the block valve outlet.

• Start Up Requirements – This jacket must be vented

at start up. Additional venting may be required after

situations where the suction or discharge piping has

been removed for maintenance and reinstalled. Some

adverse operating conditions can allow air to become

trapped in this jacket. This must be periodically vent-

ed off. If this occurs, it is recommended the small air

bleed valve is utilized.

2 - Media Cooled with External Flush -

This construction requires an external flow of water, typi-

cally re-use water. Applications which require this option

are typically heavy slurry or sludge service often found in

the treatment plant. This option routes the externally sup-

plied water into the pumped media. No pump modifica-

tions are required.

ENGLISH | 09

• Required Hardware – Mounting a regulating valve,

pressure gauge and automated block valve be-

tween the water supply and the upper jacket port is

required. The supply valve should be adjusted to al-

low the supply of water to exceed pump discharge

pressure. This assures a positive flow of water into

the pump chamber. The block valve should be auto-

mated to open whenever the pump is operated.

• Start Up Requirements – This jacket must be vented

at start up. Additional venting may be required if cool-

ing water supply is interrupted.

3 - External Fluid Cooled -

This option requires an external flow of water like in option

2 above, but is used where dilution of the pumped product

is not desirable. The supply of water is internally isolated

from the pumped media. The water inlet is routed into the

jacket’s lowest port and returned out of the highest port.

This option does NOT allow water to enter the pumped

media and pump must be ordered from factory this way.

• Required Hardware – Mounting a regulating valve,

pressure gauge and automated block valve between

the water supply and the upper jacket port is re-

quired. The supply valve should be adjusted to allow

for a good supply of water to flow through the jacket.

The block valve should be automated to open when-

ever the pump is operated.

• Start Up Requirements – This jacket must be vented

at start up. Additional venting should not be required.

3.3.7. Volute

The volute may be available rubber-coated inside. Some

volutes are supplied with a cleanout port to easily remove

blockages. The pump may be equipped with a stationary

wear ring which can be found in the intake port. This wear

ring determines the gap between the impeller and the in-

take port. If this gap is too big, the performance of the

pump decreases and it can lead to blockages. The rings

can be replaced due to wear.

3.3.8. Impeller

M: Enclosed single channel impeller, for liquids containing

impurities and sludge with solid particles or long fibres.

K: Enclosed multi channel impeller, for liquids containing

impurities and sludge with solid particles.

V: Vortex impeller, for liquids containing a high level of

impurities or fibrous matter and containing gas.

4. Package,Transport, Storage

4.1. Delivery

On arrival, the delivered items must be inspected for dam-

age and a check made that all parts are present. If any

parts are damaged or missing, the transport company or

the manufacturer must be informed on the day of delivery.

Any claim made at a later date will be deemed invalid.

Damage to parts must be noted on the delivery or freight

documentation.

4.2.Transport

Only the appropriate and approved fastening devices,

transportation means and lifting equipment may be used.

These must have sucient load bearing capacity to en-

sure that the product can be transported safety. If chains

are used they must be secured against slipping.

The personnel must be qualiﬁed for the tasks and must

follow all applicable national safety regulations during the

work. The product is delivered by the manufacturer/ship-

ping agency in suitable packaging. This normally precludes

the possibility of damage occurring during transport and

storage.

Never lift the pump by its power cable!

Ne jamais soulever la pompe par son câble d‘alimen-

tation !

4.3. Storage

Newly supplied products are prepared that they can be

stored for 1 year. The product should be cleaned thorough-

ly before interim storage.

The following should be taken into consideration for

storage:

• Place the product on a ﬁrm surface and secure

it against falling over. Submersible mixers and aux-

iliary lifting devices should be stored horizontally,

submersible sewage pumps and submersible motor

pumps should be stored horizontally or vertically. It

should be ensured that they cannot bend if stored

horizontally.

Falling Hazard!

Never leave the pump unsecured!

Risque de chute !

Ne jamais laisser la pompe sans surveillance !

• The product has to be stored in a place free from

vibrations and agitation to avoid damage to the ball

bearings.

• The device should be stored in a dry place with-

out temperature ﬂuctuation.

• The product may not be stored in rooms where

welding work is conducted as the resulting gases and

radiation can damage the elastomer parts and coat-

ings.

• Be careful to not remove or damage the corro-

sion resistant coatings.

• Any suction or pressure connections on products

should be closed tightly before storage to prevent im-

purities.

10 | ENGLISH

• The power supply cables should be protected

against kinking, damage and moisture.

• The cable will wick water into the pump if it is

not protected properly. Power cable lead should be

covered with shrink tubing or suitable sealing material

during storage.

Beware of electrical current!

Damaged power supply cables can cause fatal inju-

ry! Defective cables must be replaced by a qualified

electrician immediately.

Attention au courant électrique !

Des câbles d’alimentation endommagés peuvent

provoquer des blessures mortelles ! Les câbles dé-

fectueux doivent être remplacés immédiatement par

un électricien qualifié.

Beware of moisture!

Moisture penetrating cables can damage them and

render them useless. Therefore, never immerse ca-

ble ends in the pumped fluid or other liquids.

Attention à l’humidité !

L’humidité qui pénètre dans les câbles peut les en-

dommageretlesrendreinutilisables.Parconséquent,

ne jamais immerger les extrémités des câbles dans

le fluide pompé ou dans d’autres liquides

• The machine must be protected from direct sun-

light, heat, dust, and frost. Heat and frost can cause

considerable damage to impellers, rotors and coat-

ings.

• The impeller must be turned at monthly intervals.

This prevents the bearing from locking and the ﬁlm

of lubricant on the mechanical shaft seal is renewed.

This also prevents the gear pinions (if present on the

product) from becoming ﬁxed as they turn and also

renews the lubricating ﬁlm on the gear pinions (pre-

venting rust ﬁlm deposits).

Beware of sharp edges!

Sharp edges can form on rotors and impellers.

There is a risk of injuries. Wear protective gloves.

Attention aux bords tranchants !

Les bords tranchants peuvent se former sur les ro-

tors et les turbines. Il y a un risque de blessures. Por-

ter des gants de protection.

• If the product has been stored for longer than six

month it should be cleaned of impurities such as dust

and oil deposits before start-up. Rotors and impellers

should be checked for smooth running, housing coat-

ing and damage.

• After remaining in storage for longer than one

year, it is necessary to change the oil in the seal

chamber. This is necessary even if the pump has nev-

er been run, due to natural deterioration of mineral oil.

Before start-up, the filling levels (oil, cooling fluid

etc.) of the individual products should be checked and

topped up if required. Please refer to the machine data

sheet for specifications on filling. Damaged coatings

should be repaired immediately. Only a coating that

is completely intact fulfils the criteria for intended

usage!

If these rules are observed, your product can be stored

for a longer period. Please remember that elastomer parts

and coatings become brittle naturally. If the product is

to be stored for longer than 6 months, we recommend

checking these parts and replacing them as necessary.

Please consult the manufacturer.

4.4. Returning to the supplier

Products which are delivered to the plant must be clean

and correctly packaged. In this context, clean means

that impurities have been removed and decontaminat-

ed if it has been used with materials which are hazard-

ous to health. The packaging must protect the product

against damage. Please contact the manufacturer before

returning!

5. Installation and initial commissioning

5.1. General

To avoid damage to the lifting unit during installation and

operation, the following points must be observed:

• The installation work must be performed by qualified

personnel, in compliance with safety regulations.

• The pump must be inspected for damage prior to in-

stallation.

• For level controls, pay attention to the minimum wa-

ter coverage.

• Air bubbles in the volute and pipework must be avoid-

ed (by suitable ventilation devices or a slight incline

of the pump).

• Protect the pump from frost.

• The lifting device must have a maximum load capaci-

ty which is greater than the weight of the pump with

attachments and cable.

• The power lines of the pump must be laid in such a

way, that a safe operation and easy assembly/disas-

sembly is ensured.

• The power lines must be fixed properly in the operat-

ing room to prevent the cable from hanging loosely.

Depending on the cable length and weight, a cable

holder must be attached every 2-3 m.

• The foundation/structure must have sufficient

strength for secure and functionally correct fastening

of the pump. The operator is responsible for this.

• Verify low level lockout is functioning.

• Use baffles for the inlet. This prevents air entry into

the pumping medium, which can lead to unfavorable

operating conditions and result in increased wear.

• Do not install more than one check valve into any pip-

ing system or problems will occur.

ENGLISH | 11















No. Description

1 Pipe

2 Coupling system

3 Wet well

4 Inlet

5 Baffle plate

6 min. liquid level

7 Pump

External Seal Probe Installation Procedure

Mechanical Seal Leak Detection probe has been

shipped loose to protect from shipping damage.

Please follow this procedure to install the probe.

1. Lay pump on its side with the plug on the seal cham-

ber facing upwards as indicated.

2. Unscrew the plug with the proper wrench, taking

care not to damage the sealing surface.

3. Verify that seal chamber oil level is within ¼” of the

indicated value. Measurement is from oil level to the

top of hole. See IOM Manual for seal chamber oil vol-

ume, if required.

4. Remove the new sealing gasket from package and

install it onto the seal probe plug.

5. Install the seal probe with gasket into the opening,

taking care not to damage the cable. Then tighten the

seal probe with the proper wrench until snug. Do not

overtighten. Once tight, verify the seal gasket is prop-

erly seated and the cable is not pinched or twisted.

NOTE: At installation of the seal probe be careful not

to bind the seal probe cord as it is being installed into

the pump.

6. Lift pump into a vertical position and inspect for any

leaks.

7. Secure seal probe cable to pump body and power ca-

ble with tyraps before installing pump.

5.2. Installation

Risk of falling!

When installing the pump and accessories, work is

carried out next to wet well! Carelessness or wear-

ing the wrong shoes can lead to falling. This is life

threatening! Take all safety precautions to prevent

this.

Risque de chute !

Lors de l‘installation de la pompe et des acces-

soires, les travaux sont effectués à côté du puits de

pompage ! La négligence ou le port de mauvaises

chaussures peuvent entraîner une chute. Ceci pose

un danger de mort ! Prenez toutes les précautions de

sécurité pour éviter cela.

Torque Values

Pump

Installation

Bolts

An-

chors

SIZEize TORQUE

3” AUTOCOUPLING 8

M16X60mm

M16

146 Nm / 108 ft lb

100 Nm / 74 ft lb

4” AUTOCOUPLING 8

M16X60mm

M16

146 Nm / 108 ft lb

100 Nm / 74 ft lb

3” & 4” RING STAND 4 M16x25mm 146 Nm / 108 ft lb

3” & 4” DRY SUMP 8

M16x40mm

M16

146 Nm / 108 ft lb

100 Nm / 74 ft lb

6” AUTOCOUPLIN-

GUTOCOUPLING

M20x70mm

M16

200 Nm / 150 ft lb

100 Nm / 74 ft lb

6”“ RING STAND 4 M20x40mm 200 Nm / 150 ft lb

AUTOCOUPLING6”

DRY SUMP

(1 Piece)

M16M20x45mm

M16

100 Nm / 74 ft

lb200 Nm / 150

ft lb

100 Nm / 74 ft lb

6”“ DRY SUMP

(N/P Motor)

M20x-

70mmM20x-

65mm

M16

200 Nm / 150 ft lb

100 Nm / 74 ft lb

6” DRYRY SUMP-

SUMP

(F Motor)

M20x70mm

M16

100 Nm / 74 ft

lb200 Nm / 150

ft lb

100 Nm / 74 ft lb

8” AUTOCOUPLING-

AUTOCOUPLING

M20x70mm-

M20x70mm

M20

200 Nm / 150 ft

lb200 Nm / 150

ft lb

200 Nm / 150 ft lb

12 | ENGLISH

AUTOCOUPLING8”

RING STAND

4 M20 x30mm 200 Nm / 150 ft lb

6“ 8” DRY SUMP

(2 Piece)

M20x65mm-

M20x75mm

M20

200 Nm / 150 ft lb

Notes:

1. For pumps larger than 8” please consult factory.

2. Flange bolts must be tightened in cross pattern to

avoid damage to the raised face flanges.

3. Standard flange bolts are 316SS

4. Standard anchors are plated steel.

5. Autocoupling systems include qty. 4 M12 anchors for

the upper bracket. Torque to 51 Nm / 38 ft lb.

6. Anchor bolt holes should be drilled to the actual di-

ameter of the anchor (M12 anchor requires 12mm

diameter hole).

Submerged installation on ring stand

Attach the ring stand (available as an accessory) with

screws to the pump suction nozzle. 90° connection-el-

bow or connection loop to the pressure port of the pump,

mount pressure line. Gate valves and check valves may

need to be installed in accordance with local regulations.

The pressure line must be fitted free of tension, when

using a hose, ensure it is laid kink-free.

Secure the pump by the handle with a cable or chain, and

lower it into the pumping medium. Properly position pow-

er cable and chain so they stay above the pump and can-

not enter the pump suction.

Wet well installation with automatic coupling system

The following instructions apply to the installation of the

original HOMA Autocoupling system:

• Determine the approximate position of the base el-

bow and the upper pipe bracket for the guide tubes,

using a plumb bob where necessary.

• Check the correct installation dimensions of the

pump(s) (see dimensional drawings in the appendix).

• Drill mounting holes for the guide rail bracket on the

inside edge of the shaft opening. If this is not possi-

ble due to the space available, the guide rail bracket

can also be mounted in an offset position with a 90°

folded plate on the underside of the shaft cover. Pro-

visionally fasten the guide rail bracket with 2 screws.

• Align the base elbow to the shaft floor, use a plumb

bob from the pipe bracket- the guide tubes must be

exactly perpendicular! Fasten the base elbow to the

wet well floor using anchor bolts. Ensure that the

base elbow is exactly horizontal! If the wet well floor

is uneven, support the bearing surface accordingly.

• Mount the pressure pipes with fittings free of tension

according to the usual mounting principles.

• Insert both guide rails into the eyelets on the base

elbow and cut to size according to the position of the

guise rail bracket. Partially unscrew the guide rails

bracket, insert them into the guide rails and fasten

the bracket. The guide rails must be positioned with

no play at all, otherwise vibration will occur during op-

eration of the pump.

• Clean the wet well of any solid material (debris,

stones, etc.) before commissioning.

• Mount the guide claw on the pump dis-

charge (thread or flange connection).

Ensure that the rubber profile seal is correctly seated

in position in the guide claw (as a seal against the

coupling base), so that it will not fall out when lower-

ing the pump. See graphic below

• Attach the chain to the pump handle or lifting lugs.

Insert the pump with the guide rails in the guide claw

ears. Lower the pump into the wet well. If the pump

is seated on the base elbow, it automatically seals it-

self off to the pressure line and is ready for operation.

• Hang the end of the retrieval chain from a hook at the

wet well opening.

• Hang the motor connection cable of the pump in the

shaft at an appropriate length, with strain relief. Make

sure that the cables can not be bent or damaged.

Correct Incorrect

Rubber Ring Rubber Ring

Dry Installation

Foundation and Piping Requirements:

General

The following recommendations are basic guidelines

which are intended to outline basic requirements in the

design of the dry pit station. It is essential that a licensed

professional engineer be retained by the owner to design

the station and all support structures.

Foundations

Foundations may consist of any structure heavy enough

to provide permanent rigid support for the pump and inlet

elbow stand. Concrete foundations built up from the solid

ground are the most commonly used. The concrete floor

shall be level. The space required by the inlet stand and

the location of the foundation anchor bolts are shown on

the outline dimension drawing. Foundation bolts are to be

embedded in the concrete.

Suction Piping

Suction piping should be at least as large as the pump

inlet elbow suction. If reducers are utilized they should be

of the conical type. If the liquid source level is below the

volute horizontal centerline, the reducer must be eccentric

and installed with the level side up. If the liquid level is

above the pump volute horizontal centerline, either eccen-

tric or concentric reducers may be used. Suction piping

should be run as straight as possible. All pipe flange joints

should be gasketed to prevent air from entering the pipe.

High points that may collect vapor are to be avoided. Iso-

lation valves such as gate valves can be installed in order

to facilitate the removal of the pump for maintenance. Any

valve installed in the suction line should be installed with

the stems horizontal.

ENGLISH | 13

Discharge Piping

A check valve and isolation valve shall be installed in the

discharge line. The check valve should be installed be-

tween the pump discharge flange and the isolation valve.

If pipe increasers are used on the discharge line, they

should be placed between the check valve and the pump.

The inlet elbow stand allows the pump to be installed in

a stationary position in a dry pit. Place the inlet stand in

position and tighten the anchor nuts.

Lower the pump on to the top flange of the inlet stand.

DO NOT ALLOW SLACK ON THE LIFTING CABLE UNTIL

THE PUMP IS BOLTED DOWN. Make sure the flange bolt

holes align with the mounting holes on the underside of

the volute. Secure the pump to the mounting flange with

the fasteners that are specified in the accessory fastener

selection table below.

Vent Valve Installation

HOMA dry pit pumps are supplied with a valve and fitting

that must be installed and maintained to ensure the prop-

er performance of these pumps.

The opening for this valve is located on the base of the mo-

tor cap near the mounting screws. The pump is shipped

with a plug installed which must be removed prior to start

up. This opening is a metric straight thread and requires

an adapter included with the valve and fitting hardware. It

is also recommended that a length of hose be attached to

the valve and routed back to the sump.

Pumps with cooling jackets must be vented! The

screw plug 903.02 must be removed and replaced

with the supplied vent valve.

Les pompes avec chemise de refroidissement

doivent être ventilées ! Le bouchon à vis 903.02 doit

être retiré et remplacé par la valve de ventilation

fournie.

Note: Leave vent valve open in wet pit pump application to

prevent air entrapment in jacket.

5.3. Use of chains

Chains are used to lower a pump in the operating space

or to pull it out. They are not intended to secure a floating

pump. Intended use is as follows:

• Fasten one end of the chain on the handle of the

pump provided for this purpose. If your pump has

two ring bolts as an attachment point, you must use

a double-strand chain. When doing so, the angle of

inclination of the chain strands must be between 0°

and 45°.

• Attach the other end to the lifting device.

• Ensure tension on the chain, and then lift the pump in

a slow and controlled manner.

• Gently lower the pump into operating space.

• Lower the pump to the operating point and make

sure that the pump has a secure footing or the cou-

pling system is engaged correctly.

• Remove the chain from the lifting device and secure

it to the safety chain, which is located at the top of

the operating room. This ensures that the chain can

not fall into the operating area and constitute a dan-

ger to anyone.

14 | ENGLISH

Please note the following diagrams during installation.









No. Description

1 Chain guard

2 Chain

3 Handle

4 Pump

5.4. Initial operation

This chapter contains all the important instructions for op-

erating personnel for the safe commissioning and oper-

ation of the machine. The following information must be

strictly adhered to and checked:

• Type of installation

• Operating mode

• Minimum submergence

After a long downtime, these specifications are also to

be checked and any defects are to be rectified!

The operation and maintenance manual must always

be kept with the machine, or be kept in a designated

place where it is always accessible for all of the oper-

ating personnel.

To avoid injury to persons or damage during operation of

the machine, the following points must be observed:

• The initial operation may only be carried out by qual-

ified and trained personnel accompanied by an au-

thorized HOMA representative following the safety

instructions.

• All staff working on the machine must receive, read,

and understand the instructions.

• Activate all safety devices and emergency stop

switches before initial operation.

• Electrical and mechanical adjustments may only be

performed by professionals.

• This machine is only suitable for use at the specified

operating conditions.

5.5. Preparatory work

This pump has been designed so that it will operate re-

liably and for long periods under normal operating con-

ditions. This requires, however, that you comply with all

advice and instructions.

Please check the following points:

• Cable routing- no loops, slightly taut

• Liquid temperature and immersion depth check- see

machine data sheet

• If a hose is used on the discharge side, it should be

flushed before use with fresh water so that no depos-

its cause blockages

• For wet installation, the wet well must be cleaned

• The pressure and suction side pipe systems are to be

clean and all valves are to be opened.

• If the pump is jacketed with media cooling, the jacket

must be completely bled of air, i.e. it must be com-

pletely filled with the medium and there may be no

more air in it. The venting can be done by suitable

ventilation devices in the system, or, if available, by

venting screws at the outlet nozzle.

• Check the accessories, pipe system and suspension

unit for firm and correct fit

• Review the present level control.

• An isolation test and a level control must be carried

out before commissioning.

5.6. Electrical

When installing and selecting electrical lines and when

connecting the motor, the relevant local and NEC regula-

tions must be observed. The motor must be protected by

a motor protection circuit breaker. Connect the motor per

the wiring diagram. Pay attention to the direction of rota-

tion! If rotation is in the wrong direction, the machine will

not perform to specifications. And can be damaged under

adverse circumstances. Check the operating voltage, and

ensure there is uniform power consumption by all phases

in accordance with the machine data sheet.

Make sure that all temperature sensors and monitoring

devices, e.g. seal chamber probe, are connected and test-

ed for function.

Risk of electrocution!

Improper use of electricity can be fatal! All pumps

with exposed cable ends must be connected by a

qualified electrician.

Risque d’électrocution !

Une mauvaise utilisation de l’électricité peut être fa-

tale ! Toutes les pompes dont les extrémités de câble

sont exposées doivent être raccordées par un élec-

tricien qualifié.

ENGLISH | 15

All electrical work shall be carried out under the super-

vision of an authorized, licensed electrician. The present

state adopted edition of the National Electrical Code as

well as all local codes and regulations shall be complied

with.

5.6.1 Veriﬁcation of power supply

Prior to making any electrical connections or applying pow-

er to the pump, compare the power supply available at the

pump station to the data on the unit‘s nameplate. Confirm

that both voltage and phase match between pump and

control panel.

5.6.2 Power lead wiring

HOMA pumps may be provided with 1 or more cables,

depending on motor horsepower and operating voltage.

Power leads U1, U2, & Z2 for single phase and U, V, W for

three phase pumps may be provided as single conductor,

or as multiple conductors. Multiple conductor configura-

tions may use leads from separate cables, or may use

two conductors within one cable. Please refer to wiring

diagram in the appendix for specific connection details.

The pump must be connected electrically through a motor

starter with proper circuit breaker protection in order to

validate warranty. Do not splice cables.

5.6.3 Thermal switch wiring

Pumps are equipped with thermal switches embedded

in the stator windings which are normally closed, auto-

matically resetting switches. Switches will open when the

internal temperature rises above the design temperature,

and will close when the temperature returns to normal.

Thermal switches must be wired to a current regulated

control circuit in accordance with the NEC. Identify ther-

mal switch leads markedT1 and T3 in the power or control

cable. The resistance across the leads will be 0.5 Ohms.

Thermal leads must be connected to the thermal overload

relay located in the control panel. Thermal switch leads

must be connected to validate warranty.

Note: All sizes of Class 1, Div. 1 pumps for hazardous

service must have thermal switch leads connected to a

current regulated control circuit in accordance with NEC.

5.6.4 Seal probe wiring

The mechanical seal leak detector probe utilized in the

pump is a conductive probe which is normally open. The

intrusion of water into the seal chamber completes the

electrical circuit. Control panel provisions will sense this

circuit closure, and will provide indication or alarm func-

tions depending on the panel design. Either single or dual

wire systems may be provided. Single wire systems uti-

lize one energizing conductor, and the pump casing and

neutral lead as the ground or return portion of the circuit.

The dual wire systems utilize two separate conductors for

each leg of the circuit. With either system, the seal probe

leads must be wired into a control circuit provided in the

control panel. This control circuit must energize the probe

with a regulated power source, and sense the closed cir-

cuit in event of water intrusion Indication and alarm func-

tions must also be provided in the control circuit. Please

see control panel wiring diagram for seal probe connec-

tion points.

For Hazardous Area Classification Pumps, leak de-

tector circuit must be in conformance with applica-

ble NEC codes and regulations.

Pour les pompes classées en zone dangereuse, le

circuit du détecteur de fuites doit être conforme aux

codes et réglementations NEC applicables

5.6.5 Start / Run Capacitors and Relays

All single phase motors require start and run capacitors

along with a start relay to operate. Capacitors and relays

must be sized for the specific motor.

Capacitors are sized based on ideal conditions.

The run capacitor may need to be resized to match the

available field voltage. Each cap kit shipped is supplied

with a wiring diagram and start up procedure.

5.6.6 Single Phase Pump Start-Up Procedure

Run Capacitor sizing can vary depending on the incoming

supply voltage provided. HOMA Single Phase pumps are

provided with Start and Run Capacitor(s) sized for 220-

230V under load. Frequently, the available line voltage is

considerable different than indicated, and the Run capac-

itor(s) may need to be resized to match the available field

voltage. The following procedure will allow you to verify

proper operation of your single phase pump, and/or make

necessary changes to you capacitors to correct for your

power supply. After verifying wiring is in accordance with

your pump requirements, start pump and record the fol-

lowing readings from each of the (3) pump cable leads.

Current under load:

U1________Amps,>U2________Amps,>Z2________Amps

U1: (Should be) highest reading

U2: middle reading

Z2: lowest reading

Lead U1 (common) should have the highest current read-

ing. Lead Z2 (start) should have the lowest reading.

If Z2 current draw is greater than the current draw of ei-

ther U1 or U2, a smaller size Run capacitor (lower micro-

farad rating) is required to correct the condition. Example:

If a 60 µf Run capacitor was supplied, change to a 50 µf

Run capacitor and check current readings. Typically, only

one step down in capacitor size is required, but in certain

instances 2 steps may be required.

( ) The standard capacitor kit provided includes:

____________ µf start capacitor

____________ µf run capacitor.

( ) Additional run capacitors have been included for use in

tuning the pump to match available line voltages for opti-

mum performance.

____________ µf run capacitor

16 | ENGLISH

This form is provided for your use in optimizing the perfor-

mance and service life of your single phase pumps, and is

applicable to most Capacitor Start/Capacitor Run motors.

Please contact our customer service with any questions

or if you require any additional information or assistance.

5.7. Direction of rotation

Rotation Direction Check

All pumps have the proper rotation direction when con-

nected to a clockwise field of rotation leads. If the pump

rotation is backwards, swap two lead and reconnect. For

smaller pumps, the check can be done by observing the

pump’s movement while starting. To do this, set the pump

lightly on the ground in a perpendicular fashion and switch

it on briefly. When observing from above, the pump itself

moves slightly in a counter-clockwise direction when ro-

tating in the right direction.

The correct direction of rotation of the pump is achieved

once the pump moves counter-clockwise, since when

viewed from above, the motor starts in a clockwise

direction.

START

REACTION

ROTOR

REACTION

ATTENTION

The direction of rotation

is correct if the

impeller/propeller rotates

in a clockwise manner

when viewing down from

top of the placed unit

ATTENTION

The start reaction is

counter clockwise

For large pumps, the direction can also be determined by

looking through the pump discharge into the volute. Brief-

ly run the motor in order to verify it is running clockwise.

Caution – Rotating Impeller!

Do not touch the rotating impeller or reach into the

volute through the pressure outlets! Never reach into

the volute or touch any rotating parts during opera-

tion. Switch the machine off and wait until all rotating

parts have come to a stop prior to carrying out main-

tenance and repair work!

Attention - turbine en rotation !

Ne pas toucher la turbine en rotation ni pénétrer

dans la volute par les orifices de pression ! Ne jamais

mettre la main dans la volute ou toucher les pièces

en rotation pendant le fonctionnement. Mettre la

machine hors tension et attendre l’arrêt de toutes

les pièces en rotation avant d’effectuer des travaux

d’entretien et de réparation !

It is also possible to check the direction of rotation with a

“motor and phase rotation indicator”. This measurement

device is held from the outside up to the motor housing

of the switched-on pump and displays the direction of ro-

tation via an LED.

5.8. Motor protection

The minimum requirement is a thermal relay/motor pro-

tection circuit breaker with temperature compensation,

differential triggering, and reclosing lock in accordance

with VDE 0660 or similar national regulations. If the equip-

ment is connected to power grids where problems often

occur, we recommend the additional use of protective

devices (e.g. overvoltage protection or under voltage pro-

tection or phase failure relays, lightning protection, etc.).

When connecting the machine, the local and legal require-

ments must be adhered to.

5.9. Variable Frequency Drives

Special considerations must be taken when operating

pumps with variable frequency drives (inverters).The in-

verter circuit design, horsepower required by pump, mo-

tor cooling system, power cable length, operating voltage,

and anticipated turndown ratio must be fully evaluated

during the design stage of the installation. As a minimum,

properly sized load reactors and filters must be installed

between the inverter and the pump to protect the pump

motor from damaging voltage spikes. Warranty coverage

will not be provided on any pump motor that is operated

with a variable frequency drive, unless the load side of the

inverter is properly isolated from the pump.

5.10.Types of startups

Types of startup using with cables with exposed ends

Direct start up

At full load, the motor protection circuit breaker should

be set to the rated current. In partial load operation it is

recommended to set the motor protection circuit breaker

5% above the measured current at the operating point.

Soft start

At full load, the motor protection should be set to the rat-

ed current. In partial load operation, it is recommended to

set the motor protection 5% above the measured current

at the operating point. The starting time must be max. 5s.

The starting voltage is to be set at 40% of the rated volt-

age according to the rating plate.

Start up with HOMA GO switch

Plug the connector into the socket provided and press the

on/off switch on the GO switch.

5.10.1. After start up

The nominal current is briefly exceeded on start-up. Af-

ter completion of this operation, the operating current

should not exceed the nominal current. If the motor does

not start immediately after switching on, it must be shut

down immediately. The switch breaks specified in the

technical data must be adhered to before turning on again.

If there is a new fault, the machine must again be shut

down immediately. The machine may only be started up

again after troubleshooting.

The following items should be checked:

• Current consumption (permissible deviation between

phases max. 5%)

• Voltage difference between the individual phases

(max. 1%)

• Switching frequency and pauses (see Technical Data)

• Air entry at the inlet- if necessary, a baffle plate must

be attached

• Minimum water coverage, level control, dry run pro-

tection

• Smooth running

• Check for leaks: if necessary, take the necessary

steps according to the chapter “Maintenance”

ENGLISH | 17

6. Maintenance

6.1. General

The machine and the entire system must be inspected

and maintained at regular intervals. The time limit for

maintenance is set by the manufacturer and applies to

the general conditions of use. The manufacturer should

be consulted if the system is to be used with corrosive

and/or abrasive pumped liquids, as the time limit between

inspections may need to be reduced.

Note the following information:

• The operating and maintenance manual must be

available to the maintenance personnel and its in-

structions followed. Only the repair and maintenance

measures listed here may be performed.

• All maintenance, inspection and cleaning work on the

machine and the system may only be carried out by

trained specialists exercising extreme care in a safe

workplace. Proper protective clothing is to be worn.

The machine must be disconnected from the electric-

ity supply before any work is carried out. There must

be no way that it can be inadvertently switched on.

• Above a weight of 100lbs, only hoisting gear which

has been officially approved and which is in a tech-

nically perfect condition should be used for lowering

and raising the machine.

Make sure that all fastening devices, ropes and safe-

ty devices are in a technically perfect condition. Work

may only commence if the auxiliary hoisting gear has

been checked and found to be in perfect working order.

If it is not inspected, danger to personnel may result!

• Wiring work on the machine and system must be

carried out by an electrician. For machines approved

for work in areas subject to explosion danger, please

refer to the “Explosion protection in accordance with

the regulation” chapter.

• When working with inflammable solvents and clean-

ing agents, fires, unshielded lighting and smoking are

prohibited.

• Machines which circulate fluids hazardous to health,

or which come into contact with them, must be de-

contaminated. It must be ensured that no dangerous

gases can form or are present.

• Ensure that all necessary tools and materials are

available. Tidiness and cleanliness guarantee safe and

problem-free operation of the machine. After work-

ing on the machine all cleaning materials and tools

should be removed from it. All materials and tools

should be stored in an appropriate place.

• Operating supplies such as oil and lubricants must

be collected in appropriate vessels and proper-

ly disposed. Appropriate protective clothing is

to be worn for cleaning and maintenance jobs.

Only lubricants expressly recommended by the

manufacturer may be used. Oils and lubricants should

not be mixed. Only use genuine parts made by the

manufacturer.

A trial run or functional test of the machine must be

performed as instructed in the general operating con-

ditions.

Oil type: white mineral oil. Used oil is to be disposed ac-

cordingly.

When using white mineral oil, note the following:

• Machines which have previously been operated us-

ing other lubricants must first be thoroughly cleaned

before they can be operated using white mineral oil.

6.2. Maintenance intervals

Before initial start-up or after a longer period of

storage:

• Check insulation resistance

• Check oil level in seal chamber

• Check that impeller rotates freely by hand

Monthly:

• Monitor the amperage and voltage

• Check the used relays for proper operation

Every six months:

• Visual inspection of the power supply cable

• Visual inspection of the cable holder and the cable

bracing

• Visual inspection of accessories, e.g. the suspension

device and hoisting gears

8,000 operating hours or after two years, whichever

is earlier:

• Check the insulation resistance

• Check the lubricant in the seal chamber

• Functional inspection of all safety and control devices

15,000 operating hours or after five years, whichever

is earlier:

• General overhaul

If it is used in highly abrasive or corrosive material, the

maintenance intervals should be reduced!

6.3. Maintenance tasks

Monitoring the current consumption and voltage

The current consumption and voltage is to be monitored

periodically for all winding phases. This remains constant

during normal operation. Slight fluctuations are a result

of the composition of the pumped fluid. The current con-

sumption can assist in early detection and correction of

damage and/ or faulty operation in the impeller/propeller,

bearings and/or the motor. More extensive resulting dam-

age can thus be largely prevented and the risk of a total

failure can be reduced.

18 | ENGLISH

Checking the used relays for posistors, oil chamber

monitors, etc.

Check the relays used are functioning fault-free. Defective

devices must be immediately replaced, because these

cannot ensure safe operation of the machine. The test pro-

cedure details should be followed closely (in the operating

instructions for each relay).

Checking the insulation resistance

To check the insulation resistance, the power supply ca-

ble must be disconnected. The resistance can then be

measured with an insulation tester (measuring voltage =

1000V DC).

The following values may not be exceeded:

• The insulation resistance may not be below 20 MΩ

during initial operation. For all further measurements

the value must be greater than 2 MΩ.

• Insulation resistance too low: Moisture may have

penetrated the cable and/or the motor.

Do not connect the machine, consult manufacturer!

Visual inspection of power supply cables

The power supply line must be examined for bubbles,

cracks, scratches, chafed areas and/or crushed sections.

If damage is found, the power cable must be exchanged

immediately.

The cables may only be changed by the manufactur-

er or an authorized/certified service workshop. The

machine may not be used again until the damage has

been adequately rectified.

Visual examination of the cable holders (carabiners)

and the cable bracing

When the machine is used in basins or pits, the lifting

cables/cable holders (carabiners) and the cable bracing

are subject to constant wear. Regular inspections are nec-

essary in order to prevent the lifting cables/cable holders

(carabiners) and/or cable bracing from wearing out and to

prevent the electricity cable from being damaged.

The lifting cables/cable holders (carabiners) and the

cable bracing are to be immediately replaced if any

signs of wear appear.

Visual inspection of accessories

Inspect accessories such as suspension units and hoist-

ing gear to check whether they are secured in a stable

manner. Loose and/or defective accessories should be re-

paired immediately or replaced.

Oil Level check in Seal Chamber

Visual Inspection of Oil Chamber:

Oil Level

Please take the precise filling quantity from the spare

parts list or contact the manufacturer with the pump serial

number.

Oil Condition

The condition of the mechanical seals can be visually in-

spected as follows: Put the pump in horizontal position, so

that the oil chamber drain plug is on top. Remove the drain

plug and take out a small quantity of oil. The oil becomes

greyish white like milk if it contains water. This may be the

result of defective shaft seals. In this case the condition

of the shaft seals should be checked by a HOMA Service

shop. Oil type: Mineral Oil

Used oil has to be disposed according to the existing envi-

ronmental rules and regulations.

Functional inspection of safety and control devices

Monitoring devices are temperature sensors in the motor,

oil chamber monitors, motor protection relays, overvolt-

age relays, etc. Motor protection and overvoltage relays

and other trip elements can generally be triggered manu-

ally for test purposes. To inspect the oil chamber monitor

or the temperature sensor, the machine must be cooled

to ambient temperature and the electrical supply cable of

the monitoring device in the switch cabinet must be dis-

connected. The monitoring device is then tested with an

ohmmeter.

The following values should be measured:

Bi-metal sensor: Value = “0”- throughput

PTC sensor: A PTC sensor has a cold resistance of be-

tween 20 and 100 Ω. For 3 sensors in series this would

result in a value of between 60 and 300 Ω.

PT 100 sensor: PT 100 sensors have a value of 100ohms

at 0°C. Between 32°F and 212°F this value increases by

0.214 Ω per 1°F. PT 20 sensors have a value of 107.7 Ω at

68°C.

Moisture sensor: This value must approach infinity. If

there is a low value, there may be water in the oil.

Also observe the instructions of the optionally available

evaluation relay. In the case of larger deviations, please

consult the manufacturer. Please consult the appropri-

ate operating manual for details on inspecting the safety

and monitoring devices on the auxiliary lifting gear.

General overhaul

During this the bearings, shaft seals, O rings and power

supply cables are inspected and replaced as required in

addition to normal maintenance work. This work may only

be conducted by the manufacturer or an authorized ser-

vice workshop.

Changing the oil

The drained oil must be checked for dirt and water con-

tent. If the oil is very dirty and shows water intrusion, it

must be changed again after four weeks. If there is again

water in the oil then, it seems likely that a seal is defec-

tive. In this case, please consult the manufacturer. If an oil

chamber or leakage monitoring system is being used, the

display will light up again within four weeks of changing

the oil if a seal is defective.

The general procedure for changing oil is as follows:

Switch off the machine, let it cool down, disconnect it

from the power supply (have this done by an electri-

cian), lock out tag out the control panel, clean it and

place it vertically on a solid base. Warm or hot oil may

be pressurized. The leaking oil may cause burns. For

that reason, let the machine cool down to ambient

temperature before you touch it.

ENGLISH | 19

6.4. Sealing chamber

As there are several versions and designs of these mo-

tors, the exact location of the screw plugs varies depend-

ing on the pump unit used.

• Slowly and carefully remove the filling plug from the

seal room.

Caution: The oil may be pressurized!

• Remove the drain plug. Drain the oil and collect it in

a suitable reservoir. Clean the drain plug, fit with a

new sealing ring and screw it in again. For complete

drainage, the machine must be slightly tipped on to

its side.

Make sure that the pump is on its side and secure!

• Fill lubricant by means of the opening in the filling

plug. Comply with the specified lubricants and filling

quantities.

• Clean the filling plug, fit with a new sealing ring and

screw it in again.

7. Repairs

7.1. General

When carrying out repair work, the following information

should always be noted:

• Round sealing rings as well as existing seals should

always be replaced.

• Screw fixings such as spring washers should always

be replaced.

• The correct torques must be observed.

In general, the following applies to repairs:

Switch off the machine, disconnect it from the pow-

er supply (have this done by an electrician), clean it

and place it on a solid base in a horizontal position.

Secure it from falling over and/or slipping.

En général, les dispositions suivantes s‘appliquent

aux réparations :

Éteindre la machine, la débrancher du réseau élec-

trique (faire appel à un électricien), la nettoyer et la

placer sur une base solide en position horizontale.

Éviter qu‘elle ne tombe et/ou ne glisse.

If not otherwise stated, the torque values of the

below tables should be used. Values stated are for clean,

lubricated screws. Fixing torque [ft lbs] for screws A2/A4

(Coefficient of friction = 0.2)

A2/A4,

Hardeness class 70

A2/A4,

Hardeness class 80

DIN912/DIN933 DIN912/DIN933

M6 5 ft lbs 9 ft lbs

M8 12.5 ft lbs 21 ft lbs

M10 24 ft lbs 43 ft lbs

M12 42 ft lbs 73.5 ft lbs

M16 103 ft lbs 180.5 ft lbs

M20 201.5 ft lbs 364.5 ft lbs

7.2. Changing the impeller and volute

Changing the impeller and the volute.

• Loosen and remove the screws holding the volute to

the oil chamber.

• Secure and remove the volute from the oil chamber

with suitable equipment, e.g. hoisting gear. Place on

a secure base.

• Fasten the impeller with suitable equipment, loosen

and remove the impeller fastening (cylindrical screw

with socket hex).

Pay attention to the locking screw!

• Remove the impeller from the shaft using a suitable

extractor.

• Clean the shaft

• Attach a new impeller to the shaft.

Make sure that the sliding surfaces do not become

damaged!

• Screw a new impeller bolt and clamping disk back

onto the shaft. Fasten the impeller and tighten the

impeller bolt. See table below for toque values.

• Place the motor assembly with impeller back onto

the volute and fasten it with screws.

• It must be possible to turn the impeller by hand.

Impeller Bolt Size Torque

10mm 35 Nm / 26 ft lb

12mm 61 Nm / 45 ft lb

16mm 146 Nm / 108 ft lb

20mm 285 Nm / 210 ft lb

Changing wear ring

The stationary and rotating wear rings determine the gap

between the impeller (rotating wear ring) and the suction

port (stationary wear ring). If this gap is too big, the per-

formance of the machine decreases, and/or it can lead to

ragging or clogging. If the stationary ring shows signs of

wear, it should be replaced. This minimizes wear on the

suction port and and impeller, consequently reducing ex-

pense for spare parts.

Only OEM Parts may be used for replacement!

Inspecting and replacing these parts is performed by the

manufacturer during the general overhaul or by specially

trained personnel.

7.3. Spare Parts

In order to obtain spare parts, identify the required parts

and contact authorized HOMA customer service with your

order. Authentic HOMA parts shall be used to maintain

warranty.

Explosion Proof pumps must be identified as such,

and the pump serial number must be referenced for

proper parts identification.

Les pompes antidéflagrantes doivent être identifiées

comme telles et le numéro de série de la pompe doit

être mentionné pour une identification correcte des

pièces.

20 | ENGLISH

8.3. Restarting after an extended period of storage

Before restarting the pump, it should be completely re-

commissioned. Clean it of dust and oil deposits, then car-

ry out the necessary maintenance actions (see “Mainte-

nance”). Check that the mechanical shaft seal is in good

order and working properly. Once this work has been

completed, the machine can be installed (see “Installa-

tion”) and connected to the electricity supply by a special-

ist. See “Start-up” for instructions on restarting.

Only restart the machine if it is in perfect condition and

ready for operation.

8. Shutdown

8.1.Temporary shutdown

For this type of shutdown, the machine remains installed

and is not cut o from the electricity supply. For tempo-

rary shutdown, the machine must remain completely sub-

merged so that it is protected from frost and ice. Make

sure the wet well and the pumped ﬂuid cannot be covered

by ice. This ensures that the machine is always ready for

operation. Carry out a monthly start-up and run the pump

in operating conditions for 5 minutes.

Caution!

Only test the pump under the proper conditions of op-

eration and use. Never run the machine dry. This can

result in irreparable damage!

Mise en guarde !

Ne tester la pompe que dans les conditions de

fonctionnement et d’utilisation appropriées. Ne ja-

mais faire fonctionner la machine à sec. Cela peut

entraîner des dommages irréparables !

8.2. Final shutdown / storage

Switch o the system, disconnect the machine from the

electricity supply and dismantle and store it. Note the fol-

lowing information concerning storage:

Beware of hot parts!

When removing the machine, be careful of the tem-

perature of the housing components. These can heat

up to well above 104°F. Let the machine cool down to

ambient temperature before you touch it.

Attention aux composants chauds !

Lors du démontage de la machine, faire attention

à la température des composants du boîtier. Ces

appareils peuvent atteindre une température bien

supérieure à 40°C. Laisser la machine refroidir à la

température ambiante avant de la toucher

• Clean the machine.

• Store it in a clean, dry place, protect the machine

against frost.

• Place it down vertically onto a ﬁrm foundation and se-

cure it against falling.

• Support the cable at the cable entry assembly to help

avoid a permanent deformation.

• Protect the ends of the electric power cable from

moisture.

• Protect the machine from direct sunshine as a pre-

ventive measure against brittleness in elastomer

parts and the impeller and casing coating.

• When storing the machine in a shop please remem-

ber: Radiation and gases which occur during electric

welding destroy the elastomers of the seals.

• During lengthy periods of storage, regularly (for ex-

ample every six months) turn the impeller or propeller

by hand. This prevents indentations in the bearings

and stops the rotor from rusting up.

9.Troubleshooting

In order to prevent damage or serious injury while

repairing machine faults, the following points must

be observed:

• Only attempt to repair a fault if you have qualified

personnel. This means each job must be carried out

by trained specialist personnel, for example electrical

work must be performed by a trained electrician.

• Always secure the machine against an accidental

restart by disconnecting it from the electric system.

Lock out, tag out, and take appropriate safety precau-

tions.

• Always have a second person make sure the machine

is switched off in an emergency.

• Secure moving parts to prevent injury.

• Independent work on the machine is at one‘s own

risk and releases the manufacturer from any warranty

obligation.

Afin d‘éviter tout dommage ou blessure grave lors de

la réparation de la machine, les points suivants

doivent être respectés :

• Ne tentez de réparer une défectuosité que si vous

disposez d‘un personnel qualifié. Cela signifie que

chaque travail doit être effectué par un personnel

spécialisé formé, par exemple, les travaux d’électri-

cité doivent être effectués par un électricien qualifié.

• Toujours sécuriser la machine contre un redémarrage

accidentel en la déconnectant du système électrique.

Verrouillez, étiquetez et prenez les mesures de sécu-

rité appropriées.

• Demandez toujours à une deuxième personne de

s’assurer que la machine est éteinte en cas d’ur-

gence.

• Attachez les pièces mobiles pour éviter les blessures.

• Toute intervention indépendante sur la machine se

fait à ses propres risques et libère le fabricant de

toute obligation au titre de la garantie.

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