Wilo VeroLine IPH Series User guide

Wilo-VeroLine-IPH-O, IPH-W
Pioneering for You
2 140 983-Ed.01 / 2013-10-Wilo
de Einbau- und Betriebsanleitung
en Installation and operating instructions
fr Notice de montage et de mise en service
nl Inbouw- en bedieningsvoorschriften

Fig. 1:
Fig. 2: Fig. 3:

Fig. 4:
1.2 3.1 2.3 3.6 3.5 2.2
13
3.2 3.3 3.4 6.3 6.2 6.1 1.2 2.2 2.3 3.2 3.3 3.4
735 6
8 9 10 4
1.1 1.2
1.2
2
2.1
2.4
2.2
2.3

de Einbau- und Betriebsanleitung 3
gb Installation and operating instructions 19
fr Notice de montage et de mise en service 35
nl Inbouw- en bedieningsvoorschriften 51

1 General.................................................................................................................................................. 19
2 Safety.................................................................................................................................................... 19
2.1 Indication of instructions in the operating instructions .................................................................................19
2.2 Personnel qualifications ......................................................................................................................................20
2.3 Danger in the event of non-observance of the safety instructions ..............................................................20
2.4 Safety consciousness on the job ........................................................................................................................20
2.5 Safety instructions for the operator .................................................................................................................20
2.6 Safety instructions for inspection and installation work ................................................................................21
2.7 Unauthorised modification and manufacture of spare parts ..........................................................................21
2.8 Improper use ........................................................................................................................................................21
3 Transport and interim storage ........................................................................................................... 21
3.1 Shipping ................................................................................................................................................................21
3.2 Transport for installation/dismantling purposes .............................................................................................21
4 Intended use......................................................................................................................................... 22
5 Product information............................................................................................................................ 22
5.1 Type key ................................................................................................................................................................22
5.2 Technical data ......................................................................................................................................................23
5.3 Scope of delivery .................................................................................................................................................23
5.4 Accessories ...........................................................................................................................................................23
6 Description and function .................................................................................................................... 24
6.1 Description of the product .................................................................................................................................24
7 Installation and electrical connection ............................................................................................... 24
7.1 Installation ............................................................................................................................................................24
7.2 Electrical connection ...........................................................................................................................................26
8 Commissioning/decommissioning ..................................................................................................... 27
8.1 Commissioning .....................................................................................................................................................27
8.2 Decommissioning .................................................................................................................................................28
9 Maintenance......................................................................................................................................... 28
9.1 Mechanical seal ....................................................................................................................................................29
9.2 Disassembling and dismantling the pump ........................................................................................................29
9.2.1 Dismantling .......................................................................................................................................................... 29
9.2.2 Installation............................................................................................................................................................ 30
10 Faults, causes and remedies ............................................................................................................... 31
11 Spare parts............................................................................................................................................ 31
12 Disposal................................................................................................................................................. 33

English
Installation and operating instructions Wilo-VeroLine-IPH-O, IPH-W 19
Installation and operating instructions
1 General
About this document The language of the original operating instructions is German. All
other languages of these instructions are translations of the original
operating instructions.
These installation and operating instructions are an integral part of
the product. They must be kept readily available at the place where
the product is installed. Strict adherence to these instructions is a
precondition for the proper use and correct operation of the product.
These installation and operating instructions correspond to the rele-
vant version of the product and the underlying safety regulations and
standards valid at the time of going to print.
EC declaration of conformity:
A copy of the EC declaration of conformity is a component of these
operating instructions.
If a technical modification is made on the designs named there with-
out our agreement or the declarations made in the installation and
operating instructions on product/personnel safety are not observed,
this declaration loses its validity.
2Safety
These operating instructions contain basic information which must
be adhered to during installation, operation and maintenance. For this
reason, these operating instructions must, without fail, be read by the
service technician and the responsible specialist/operator before
installation and commissioning.
It is not only the general safety instructions listed under the main
point "safety” that must be adhered to but also the special safety
instructions with danger symbols included under the following main
points.
2.1 Indication of instructions in the
operating instructions
Symbols General danger symbol
Danger due to electrical voltage
NOTE
Signal words DANGER!
Acutely dangerous situation.
Non-observance results in death or the most serious of injuries.
WARNING!
The user can suffer (serious) injuries. “Warning” implies that (seri-
ous) injury to persons is probable if this information is disregarded.
CAUTION!
There is a risk of damaging the product/unit. “Caution” implies that
damage to the product is likely if this information is disregarded.
NOTE
Useful information on handling the product. It draws attention to
possible problems.

English
20 WILO SE 10/2013
Information that appears directly on the product, such as
• Direction of rotation arrow
• Rating plate
• Warning sticker
Must be strictly complied with and kept in legible condition.
2.2 Personnel qualifications The installation, operating and maintenance personnel must have the
appropriate qualifications for this work. Area of responsibility, terms
of reference and monitoring of the personnel are to be ensured by the
operator. If the personnel are not in possession of the necessary
knowledge, they are to be trained and instructed. This can be accom-
plished if necessary by the manufacturer of the product at the request
of the operator.
2.3 Danger in the event of
non-observance of the safety
instructions
Non-observance of the safety instructions can result in risk of injury
to persons and damage to the environment and the product/unit.
Non-observance of the safety instructions results in the loss of any
claims to damages.
In detail, non-observance can, for example, result in the following
risks:
• Danger to persons from electrical, mechanical and bacteriological
influences
• Pollution of the environment due to leakage of hazardous materials
• Damage to property
• Failure of important product/unit functions
• Failure of required maintenance and repair procedures
2.4 Safety consciousness on the job The safety instructions included in these installation and operating
instructions, the existing national regulations for accident prevention
together with any internal working, operating and safety regulations
of the operator are to be complied with.
2.5 Safety instructions for the operator This appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of expe-
rience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible
for their safety or where they receive instructions from such a person
as to how the device is to be operated.
Children should be supervised to ensure that they do not play with the
appliance.
• If hot or cold components on the product/the unit lead to hazards,
local measures must be taken to guard them against touching.
• Guards protecting against touching moving components (such as the
coupling) must not be removed whilst the product is in operation.
• Leakages (e.g. from the shaft seals) of hazardous fluids (which are
explosive, toxic or hot) must be led away so that no danger to persons
or to the environment arises. National statutory provisions are to be
complied with.
• Danger from electrical current must be eliminated. Local directives or
general directives (e.g. IEC, VDE etc.) and local energy supply compa-
nies must be adhered to.
• The area near the pump unit must be kept free of contaminants to
eliminate the chance of a fire or an explosion due to contact of con-
taminants with hot unit surfaces.
• The instructions in this manual apply to the standard version of the
product. This book does not discuss all details or frequent deviations.
Additional information can be requested from the manufacturer, if
necessary.
• If there are any doubts about the function or setting of parts of the
product, contact the manufacturer immediately.

English
Installation and operating instructions Wilo-VeroLine-IPH-O, IPH-W 21
2.6 Safety instructions for inspection
and installation work
The operator must ensure that all installation and maintenance work
is carried out by authorised and qualified personnel who are suffi-
ciently informed from their own detailed study of the operating
instructions.
Work to the product/unit must only be carried out when at a standstill.
It is mandatory that the procedure described in the installation and
operating instructions for shutting down the product/unit are com-
plied with.
Immediately on conclusion of the work, all safety and protective
devices must be put back in position and/or recommissioned.
2.7 Unauthorised modification and
manufacture of spare parts
Unauthorised modification and manufacture of spare parts will impair
the safety of the product/personnel and will make void the manufac-
turer's declarations regarding safety.
Modifications to the product are only permissible after consultation
with the manufacturer. Original spare parts and accessories author-
ised by the manufacturer ensure safety. The use of other parts will
absolve us of liability for consequential events.
2.8 Improper use The operating safety of the supplied product is only guaranteed for
conventional use in accordance with Chapter 4 of the operating
instructions. The limit values must on no account fall under or exceed
those specified in the catalogue/data sheet.
3 Transport and interim storage
3.1 Shipping The pump is enclosed in a box or lashed to a pallet ex works and is pro-
tected against dirt and moisture.
Transport inspection On arrival, inspect the pump immediately for any transport damage.
If damage is detected, the necessary steps involving the forwarding
agent must be taken within the specified period.
Storage Before installation and/or during interim storage, the pump must be
kept dry, frost-free and protected from mechanical damage.
CAUTION! Risk of damage due to incorrect packaging!
If the pump is transported again at a later time, it must be packaged
so that it cannot be damaged during transport.
• Use the original packaging for this, or choose equivalent packag-
ing.
3.2 Transport for installation/
dismantling purposes
WARNING! Risk of injury!
Improper transport can lead to personal injury.
• The pump must be transported using approved load bearing equip-
ment. This is to be attached to the pump flanges and, if necessary,
to the outer motor diameter (safety device to protect against slip-
ping required!).
• Transport eyes can be screwed into the threaded holes provided on
the motor for that purpose. These eyes must only be used for guid-
ing while bearing the load (fig. 5).
• To lift with a crane, the pump must be supported by suitable belts,
as shown. Place loops around the pump which tighten from the
pump's own weight.
• If transport eyes are attached to the motor, they are only approved
for transporting the motor, not the complete pump (fig. 6).
Fig. 5: Attaching the transport ropes

English
22 WILO SE 10/2013
WARNING! Risk of injury due to the weight of the pump!
The pump itself and pump parts can be extremely heavy. Falling
parts pose a risk of cuts, crush injuries, bruises or impacts, which
may lead to death.
• Always use suitable lifting equipment and secure parts against fall-
ing.
• Never stand underneath a suspended load.
• Wear protective clothing for all work (safety shoes, helmet, pro-
tective gloves and protective goggles).
4 Intended use
Purpose Glanded pumps in the IPH series are used specifically for pumping hot
water and hot liquids in the fields of application specified below.
Fields of application They may be used for:
• Hot-water heating systems,
• District heating systems,
• Industrial circulation systems,
• Heat carrier circuits.
Contraindications Typical installation locations are technical rooms within the building
with other domestic installations. Installing the device directly in
other used rooms (residential and work rooms) is not intended.
CAUTION! Risk of material damage!
Unpermitted substances in the fluid can destroy the pump. Abra-
sive solids (e.g. sand) increase pump wear.
Pumps without an Ex rating are not suitable for use in potentially
explosive areas.
• The intended use includes complying with these instructions.
• Any other use is considered to be outside the intended use.
5 Product information
5.1 Type key The type key consists of the following elements:
Fig. 6: Transporting the motor
(schematic diagram)
For
example:
IPH-O 65/125-2.2/2
IP Flange-end pump as In-line Pump
...H-O
...H-W
Heat transfer media (heat transfer oil)
Superheated water
65 Nominal diameter DN of the pipe connection
125 Nominal impeller diameter [mm]
2.2 Rated power P2[kW]
2 Number of motor poles

English
Installation and operating instructions Wilo-VeroLine-IPH-O, IPH-W 23
5.2 Technical data
When ordering spare parts, make sure to state all the information
given on the pump and motor rating plates.
Fluids If water/glycol mixtures with up to 40% glycol (or fluids with a differ-
ent velocity to pure water) are used, the pump data must be corrected
to match the higher viscosity, regardless of the percentage mixture
relationship and the fluid temperature. The motor power must also be
adjusted if necessary.
• Only use mixtures with corrosion inhibitors. The respective manufac-
turer's instructions are to be observed.
• The fluid must be sediment-free.
• Wilo's approval must be obtained for the use of other fluids.
NOTE
Always read and follow the material safety data sheet for the fluid
being pumped.
5.3 Scope of delivery •IPH-W/Opump
• Installation and operating instructions
• Counter flange and seals
5.4 Accessories Accessories must be ordered separately:
•PTCthermistortripping unit for switch cabinet installation
For a detailed list, consult the catalogue/price list.
Property Value Remarks
Rated speed 2900 or 1450 rpm
Nominal diameters DN IPH-O: 20 to 80
IPH-W: 20 to 80
Permissible min./max. fluid temperature IPH-O: +20 °C to +350 °C
IPH-W: -10 °C to +210 °C
Max. ambient temperature +40 °C
Maximum permissible operating pressure IPH-O: 9 bar at max. +210 °C
IPH-W: 23 bar at max. +350 °C
Insulation class F
Protection class IP 55
Pipe and pressure measurement connec-
tions
Tongue and groove flange PN25
(in accordance with DIN EN 1092-1)
Standard version
Approved fluids Heating water according to VDI 2035
Water/glycol mixture up to 40 Vol.-% Standard version
Heat transfer oil Standard version
Electrical connection 3~400 V, 50 Hz Standard version
3~230 V, 50 Hz Alternative application for stand-
ard version (no additional charge)
Motor special version Special voltage/frequency
(on request)
Special version or auxiliary equip-
ment (at additional charge)
Motor protection Required onsite Standard version
Speed control Wilo control devices Standard version

English
24 WILO SE 10/2013
6Descriptionandfunction
6.1 Description of the product The single-stage centrifugal pump is equipped with a directly flanged
motor and a one-piece shaft (monobloc design). The steel pump
housing has an in-line construction, i.e. the suction and pressure
ports lie along a straight line. The pump is designed as an in-line
pump. The pump weight and the position of its centre of gravity ena-
ble all pump sizes to be attached directly to the piping. This requires
the pipe to be appropriately secured to the structure. The pump shaft
is sealed by a mechanical seal for temperatures of up to +210 °C
(IPH-W) or +350 °C (IPH-O). It is cooled by means of the housing
cover's cooling fins.
In conjunction with a control device (Wilo-VR system or Wilo-CC
system), the power of the pumps can be continuously controlled.
This allows optimisation of the pump output for the demands of the
installation and economically efficient pump operation.
7Installationandelectrical connection
Safety DANGER! Risk of fatal injury!
Incorrect installation and improper electrical connections can be
life-threatening.
• Have the electrical connections established by approved electri-
cians only, in compliance with the applicable regulations!
• Adhere to regulations for accident prevention!
DANGER! Risk of fatal injury!
Failure to install safety devices on the motor, terminal box or on
the coupling can cause electrical shock or contact with rotating
parts, potentially resulting in life-threatening injuries.
• Before commissioning and after maintenance work, all safety
devices (such as terminal box covers or coupling covers) that were
removed must be reinstalled.
• Keep a safe distance during commissioning.
• Always wear protective clothing, protective gloves and protective
goggles when working.
WARNING! Risk of injury due to the weight of the pump!
The pump itself and pump parts can be extremely heavy. Falling
parts pose a risk of cuts, crush injuries, bruises or impacts, which
may lead to death.
• Always use suitable lifting equipment and secure parts against fall-
ing.
• When performing installation and maintenance work, protect the
pump components against falling.
• Never stand underneath a suspended load.
CAUTION! Risk of material damage!
Danger of damage due to incorrect handling.
• Have the pump installed by qualified personnel only.
7.1 Installation
Preparation • The pump should only be installed after completion of all welding and
soldering work and, if necessary, flushing of the pipe system. Dirt can
cause the pump to fail.
• Standard pumps must be protected from the weather and installed in
a frost/dust-free, well-ventilated environment which is not poten-
tially explosive.
• Install the pump in a place that is easy to access so that subsequent
inspections, maintenance (e.g. mechanical seal) or replacement is
easily possible.

English
Installation and operating instructions Wilo-VeroLine-IPH-O, IPH-W 25
Positioning/alignment • A hook or eyelet with the corresponding bearing capacity is to be
installed vertically above the pump (for the total weight of the pump:
see catalogue/data sheet), to which hoisting gear or similar aids can
be attached when conducting maintenance or repair work on the
pump.
CAUTION! Risk of material damage!
Danger of damage due to incorrect handling.
• Only use lifting eyes on the motor for carrying the weight of the
motor and not for carrying the entire pump.
• Lift the pump using permitted load-bearing equipment (see chap-
ter 3 “Transport and interim storage” on page 5).
• Minimum distance between a wall and the fan guard of the motor:
30 cm.
• The suction and pressure flange are both marked with a cast arrow to
indicate the flow direction. The direction of flow must correspond to
the direction arrow on the flanges.
• Shut-off devices must be installed without fail in front of and behind
the pump in order to avoid the entire system being drained when the
pump is inspected or exchanged.
• Between the lower shut-off device and the pump, a drain cock must
be fitted for draining the pump during dismantling.
• When using the pump in air-conditioning or cooling systems, the
condensate which accumulates in the lantern can be discharged spe-
cifically via the existing holes. The lantern has an opening on the
underside which allows a drain pipe for condensation water to be con-
nected.
• The pipes and pump must be free of mechanical stress when installed.
• All installation positions except for "motor facing down" are allowed
(see Installation positions fig. 7).
• The air vent valve or a venting screw (fig. 1, Item 441h) must always
face upwards.
NOTE
The motor terminal box must not face downward or water may enter
into it. If necessary, the motor housing can be rotated after loosening
the fastening screws so that the terminal box is pointing upwards.
This also ensures that one of the venting screws (fig. 1, Item 441h) is
located at the highest possible point.
CAUTION! Risk of material damage!
Danger of damage due to incorrect handling.
• Do not damage the housing flat gasket.
NOTE
When pumping out of a tank, ensure that the liquid level is always
high enough above the suction port of the pump so that the pump
never runs dry. The minimum intake pressure must be observed.
NOTE
In the case of insulated systems, only the pump housing may be insu-
lated, not the lantern and motor.
• Two opposite holes (fig. 1, Item 365u) on the flange on the motor side
of the lantern make it possible (depending on the installation method)
to identify leakages in the mechanical seal. These holes must not be
blocked (remove plugs); provide a visible outlet for pipework.
Fig. 7: Permitted installation positions

English
26 WILO SE 10/2013
7.2 Electrical connection
Safety DANGER! Risk of fatal injury!
An improper electrical connection can result in a fatal electrical
shock.
• Have the electrical connection established by an electrician
approved by the local electricity supplier only and in accordance
with local regulations.
• Observe the installation and operating instructions for the acces-
sories!
WARNING! Risk of mains overload!
An inadequate mains design can lead to system failures and even to
cable fires due to mains overload.
• When designing the mains, with regard to the cable cross-sections
and fuses, give special consideration to the fact that short-term
simultaneous operation of all pumps is possible in multi-pump
operation.
Preparation/notes • The electrical connection must be established via a fixed power cable,
which is provided with a plug device or an all-pole switch with a con-
tact opening width of at least 3 mm (in accordance with VDE 0730
Part 1 in Germany).
• The connection line is to be installed in such a way that it cannot
under any circumstances come into contact with the pipe and/or the
pump and motor housing.
• In order to ensure drip protection and strain relief on the threaded
cable connection, cables are to be used which have a sufficient outer
diameter and are to be screwed sufficiently tightly. To get rid of any
drips that accumulate, the cables are to be bent into a drain loop near
the threaded cable connection.
• Non-assigned threaded cable connections must remain sealed with
the plugs provided by the manufacturer.
• When pumps are used in systems with water temperatures above
90 °C, a suitably heat-resistant power cable must be used.
• Check the current type and voltage of the mains connection.
• Observe the rating plate information for the pump. The current type
and voltage of the mains connection must correspond to the details
on the rating plate.
• Fuse protection on mains side: depending on the motor's rated cur-
rent and the activation type.
• Earth the pump/installation in accordance with the regulations.

English
Installation and operating instructions Wilo-VeroLine-IPH-O, IPH-W 27
• The use of a motor protection switch is recommended.
Setting the motor protection switch:
• Direct starting:
Set according to the rated motor current specified on the name
plate of the motor.
•Y-Δstart:
If the motor protection switch is switched in the supply line to
a Y-Δcontactor combination, set the switch as for direct starting.
If the motor protection switch is switched in a thread of the motor
supply line (U1/V1/W1 or U2/V2/W2), set the motor protection
switch to 0.58 x rated motor current.
• The mains connection to the terminal board is dependent on the
motor power P2, the mains voltage and the start-up type. The recom-
mended switching arrangement of the connection bridges in the ter-
minal box should be taken from the following table and fig. 8.
• When connecting automatic switching devices, observe the relevant
installation and operating instructions.
8 Commissioning/decommissioning
Safety DANGER! Risk of fatal injury!
Failure to install safety devices on the motor, terminal box or on
the coupling can cause electrical shock or contact with rotating
parts, potentially resulting in life-threatening injuries.
• Before commissioning and after maintenance work, all safety
devices (such as terminal box covers or coupling covers) that were
removed must be reinstalled.
• Keep a safe distance during commissioning.
• Always wear protective clothing, protective gloves and protective
goggles when working.
WARNING! Risk of burns or freezing to the pump when body parts
come into contact with the pump!
Depending on the pump or system operating conditions (fluid tem-
perature), the entire pump can become very hot or very cold.
• Keep a safe distance during operation!
• In the case of high water temperatures and system pressures, allow
the pump to cool down before all work.
• Always wear protective clothing, protective gloves and protective
goggles when working.
8.1 Commissioning NOTE
Depending on the pump's installation position, one of the venting
screws is not necessarily at the highest point (fig. 1, Item 441h and
fig. 2). In this case, you have to loosen the socket screws on the pump
housing and rotate the "lantern and motor" unit so that one of the
venting screws is at the highest point.
CAUTION! Risk of damaging the pump!
• When rotating the "lantern and motor" unit, take care not to
damage the housing's flat gasket.
CAUTION! Risk of damaging the pump!
• Protect the terminal box from any water escaping when venting.
• Close the stop valve on the pressure side.
Fig. 8: Mains connection
L1 L2 L3
W2 U2 V2
U1 V1 W1
L1 L2 L3
W2 U2 V2
U1 V1 W1
W2 U2 V2
U1 V1 W1
Start-up type Mains voltage 3~230 V Mains voltage 3~400 V
Direct ∆-circuit (fig. 8 top) Y-circuit (fig. 8 centre)
Y-∆starting Remove connection
bridges (fig. 8 below)
not possible

English
28 WILO SE 10/2013
• Open the stop valve on the suction side.
• Fill the system with water and vent it.
• Vent the pump using one of the venting screws until fluid comes out.
Then close the venting screw again.
WARNING! Danger due to extremely hot or extremely cold pressu-
rised fluid!
Depending on the temperature of the fluid and the system pres-
sure, when the venting screw is opened completely, extremely hot
or extremely cold fluid in liquid or vapour form may escape or shoot
out at high pressure.
• Always exercise caution when opening the venting screw.
CAUTION! Risk of damaging the pump!
Running dry will destroy the mechanical seal.
• Make sure that the pump does not run dry.
• Switch on briefly and check whether the direction of rotation corre-
sponds to the arrow on the pump housing. If the direction of rotation
is incorrect, proceed as follows:
• Swap the 2 phases on the motor terminal board (e.g. L1 for L2).
• Switch on the pump.
• Open the stop valve on the pressure side.
• Completely vent the pump and unit again.
NOTE
To avoid premature wear and resultant defects in the pump,
a minimum volume flow of 10–15% of the pump's rated volume flow
must be guaranteed.
NOTE
When pumping out of a tank, ensure that the liquid level is always
high enough above the suction port of the pump so that the pump
does not run dry. The minimum intake pressure must be observed.
WARNING! Danger of injury!
If the pump/system is installed improperly, liquid may be ejected
during commissioning. Individual components may also become
loose.
• Keep a safe distance from the pump during commissioning.
• Wear protective clothing and gloves.
8.2 Decommissioning • Close both stop valves. If necessary, drain the pump.
• Prime and vent the pump before any recommissioning.
9 Maintenance
Safety Have maintenance and repair work carried out by qualified skilled
personnel only!
It is recommended to have the pump serviced and checked by Wilo
after-sales service.
DANGER! Risk of fatal injury!
There is risk of fatal injury from electrical shock when working on
electrical equipment.
• Work on electrical equipment may only be done by electricians
approved by the local electricity supplier.
• Before working on electrical equipment, switch it off and secure it
against being switched on again.
• Follow the installation and operating instructions for the pump,
level control device and other accessories.

English
Installation and operating instructions Wilo-VeroLine-IPH-O, IPH-W 29
DANGER! Risk of fatal injury!
Failure to install safety devices on the motor, terminal box or on
the coupling can cause electrical shock or contact with rotating
parts, potentially resulting in life-threatening injuries.
• Before commissioning and after maintenance work, all safety
devices (such as terminal box covers or coupling covers) that were
removed must be reinstalled.
• Keep a safe distance during commissioning.
• Always wear protective clothing, protective gloves and protective
goggles when working.
WARNING! Risk of injury due to the weight of the pump!
The pump itself and pump parts can be extremely heavy. Falling
parts pose a risk of cuts, crush injuries, bruises or impacts, which
may lead to death.
• Always use suitable lifting equipment and secure parts against fall-
ing.
• When performing installation and maintenance work, protect the
pump components against falling.
• Never stand underneath a suspended load.
DANGER! Risk of burns or freezing to the pump when body parts
come into contact with the pump!
Depending on the pump or system operating conditions (fluid tem-
perature), the entire pump can become very hot or very cold.
• Keep a safe distance during operation!
• In the case of high water temperatures and system pressures, allow
the pump to cool down before all work.
• Always wear protective clothing, protective gloves and protective
goggles when working.
9.1 Mechanical seal The mechanical seal is maintenance-free. There may be a slight
amount of drip leakage during the running-in period. Once in a while,
however, a visual inspection is required. If there is clearly detectable
leakage, the seal is to be changed. Wilo offers a repair kit which con-
tains the necessary parts for replacement.
9.2 Disassembling and dismantling
the pump
9.2.1 Dismantling See fig. 1 for disassembling/dismantling the pump:
• Disconnect the system from the power and secure it against being
switched on.
• Close the check valves in front of and behind the pump.
• Drain the pump.
WARNING! Danger due to extremely hot or extremely cold pressu-
rised fluid!
Depending on the temperature of the fluid and the system pres-
sure, when the venting screw is opened completely, extremely hot
or extremely cold fluid in liquid or vapour form may escape or shoot
out at high pressure.
• Take extra care when draining the unit.
• Loosen the screws (437a) on the flange between the pump and the
lantern (5b) and remove the motor, together with the impeller and
lantern, from the pump housing. The pump housing (201f) remains in
its installed position.
• Store the housing seal (411a) in a safe place.
• Loosen the impeller nut (49a) and remove the impeller disc (319k),
impeller (207a) and key (487b).
• Remove the housing cover (71c), circlip (481a) and radial bearing
(59a).

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30 WILO SE 10/2013
CAUTION! Risk of material damage!
Danger of damage due to incorrect handling.
• When changing the mechanical seal, you also have to replace the
radial bearing.
• Remove the rotating part of the mechanical seal (105b) from the shaft
by loosening the set screws (hexagon socket).
• Separate the lantern (5b) from the motor flange and remove the static
part of the mechanical seal (105a) together with the seal rings (413a
and 413b).
• Clean all the components, tight seats and sealing surfaces thoroughly
and check for wear.
9.2.2 Installation To assemble the unit, follow the dismantling steps in reverse order.
NOTE
If the pump has been dismantled, it is a good idea to replace the bear-
ing, mechanical seal and seal rings with new parts.
NOTE
When tightening screw connections in conjunction with the work
described in the following: Observe the screw tightening torque for
the thread type (see section “Screw tightening torques” on page 14).
NOTE
If you replace the mechanical seal, comply with installation dimension
L2 as per fig. 3.
NOTE
If it is not possible to check dimension L2 using standard measuring
means, you have to determine dimension L1 on the old part from the
shaft end to the mechanical seal. Then transfer this dimension L1 to
the new part so that you can then install the mechanical seal on the
new shaft.
Screw tightening torques
Fig. 9:
Motor power
P2 < 1 kW P21kW P24kW
L1 [mm] 107 ± 0.3 129 ± 0.3 129 ± 0.3
L2 [mm] 52 ± 0.6 52 ± 0.6 62 ± 0.6
L3 [mm] 37 +0.7/-0.6 37 +0.7/-0.6 37 +0.7/-0.6
Screw connection Tightening torque
Nm ± 10 %
Installation
instructions
Heat sink — pump housing M6x25
M8x30
25
35
-
Lantern — heat sink M6x20 25 -
Lantern — motor M8x40
M8-8 nut
Washer
25
-
M12x50
M12-8 nut
Washer
60
-
Impeller — shaft M8 nut
M12x1.25 nut
M8 screw
25
60
12
-

English
Installation and operating instructions Wilo-VeroLine-IPH-O, IPH-W 31
10 Faults, causes and remedies
Have faults remedied by qualified personnel only! Observe the
safety instructions in chapter 9.2 “Disassembling and dismantling
the pump” on page 13.
• If the malfunction cannot be rectified, consult a specialist techni-
cian or the nearest Wilo customer service or representative office.
11 Spare parts
Spare parts may be ordered via a local specialist and/or Wilo after-
sales service.
To avoid queries and incorrect orders, all data of the rating plate
should be submitted for each order.
CAUTION! Risk of material damage!
Trouble-free pump operation can only be guaranteed when origi-
nal spare parts are used.
• Only use original Wilo spare parts.
• Each component is identified in the table below.
Information to be provided when ordering spare parts:
• Spare part number
• Name/description of the spare part
• All data on the pump and motor rating plate
Fault Cause Remedy
Pump does not start
or stops working
Pump blocked Disconnect motor from power supply, remove cause of
blockage; if motor blocked, overhaul/replace motor/motor
impeller unit
Cable terminal loose Tighten all terminal screws
Fuses defective Check fuses; replace faulty fuses
Motor damaged Have the motor checked by Wilo customer service or a spe-
cialised service centre and serviced if necessary
Motor protection switch has
triggered
Throttle the pump to the rated volume flow on the pressure
side
Motor protection switch set
incorrectly
Set the motor protection switch to the correct rated current
as shown on the rating plate.
Motor protection switch
affected by excessive ambient
temperature
Move the motor protection switch or protect it using thermal
insulation
Pump runs at reduced
output
Incorrect direction of rotation Check direction of rotation, change if necessary
Stop valve on the pressure side
throttled
Slowly open the stop valve
Air in the suction line Seal leaks at the flanges; vent
Pump making noises Insufficient supply pressure Increase supply pressure, observe minimum pressure at the
suction port, check slide valve and filter on the suction side
and clean if need be
Motor has bearing damage Have the pump checked by Wilo after-sales service or a spe-
cialised service centre and repaired if necessary

English
32 WILO SE 10/2013
Spare parts For the allocation of assemblies, see fig. 4.
No. Part Details
1Pump housing (set) with:
1.1 Pump housing
1.2 Flat gasket
2Impeller (set) with:
1.2 Flat gasket
2.1 Impeller
2.2 Disc
2.3 Nut
2.4 Key
3Cooling housing (set) with:
1.2 Flat gasket
2.2 Disc
2.3 Nut
3.1 Cooling housing
3.2 Circlip
3.3 Retaining ring
3.4 O-ring
3.5 O-ring
3.6 Screw
4Motor
5Mechanical seal (set) Nut
6Intermediate piece (set) with: Locking disc
1.2 Flat gasket
2.2 Disc
2.3 Nut
3.2 Circlip
3.3 Retaining ring
3.4 O-ring
6.1 O-ring
6.2 Plug
6.3 Lantern
7Fastening screw for pump
housing/heat sink
8Fastening screw for
motor/lantern
9Contact disc for
motor/lantern
10 Nut for motor/lantern
Counter flange (set) with:
Weld neck flange
Flat gasket