Wilo CronoLine-IL User manual

Wilo-CronoLine-IL
Wilo-CronoTwin-DL
Wilo-CronoBloc-BL
Pioneering for You
2 161 475-Ed.01 / 2016-08-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: IL (Design A)
Fig. 2: DL (Design A)

Fig. 3: BL (Design A)
Fig. 4: IL (Design B)
5
1.14 1.31 1.32 1.11 1.12 1.151.333.23.1 1.14
1
1.3
1.1
3
2
1.5
1.11 1.15 1.12 1.13 1.16 1.14
1.4
1.11
1.12
1.14
1.15 1.43 1.41
1.2
1.11 1.15 1.12 1.21 1.14
46

Fig. 5: BL (Design B)
1
5
1.14 1.31 1.32 1.11 1.12 1.151.333.3 3.2 3.1 1.14
1.3
1.1
3
2
1.5
1.11 1.15 1.12 1.13 1.16 1.14
1.4
1.11
1.12
1.14
1.15 1.43 1.41
1.2
1.11 1.15 1.12 1.21 1.14
46

English
1 General information.............................................................................................................................31
2 Safety.....................................................................................................................................................31
2.1 Symbols and signal words in the operating instructions ................................................................................31
2.2 Personnel qualifications ......................................................................................................................................32
2.3 Danger in the event of non-observance of the safety instructions ..............................................................32
2.4 Safety consciousness on the job ........................................................................................................................32
2.5 Safety instructions for the operator .................................................................................................................32
2.6 Safety instructions for installation and maintenance work ...........................................................................33
2.7 Unauthorised modification and manufacture of spare parts ..........................................................................33
2.8 Improper use ........................................................................................................................................................33
3 Transport and interim storage............................................................................................................33
3.1 Shipping ................................................................................................................................................................33
3.2 Transport for installation/dismantling purposes .............................................................................................33
4 Intended use .........................................................................................................................................34
5 Product information.............................................................................................................................35
5.1 Type key ................................................................................................................................................................35
5.2 Technical data ......................................................................................................................................................35
5.3 Scope of delivery .................................................................................................................................................36
5.4 Accessories ...........................................................................................................................................................36
6 Description and function.....................................................................................................................37
6.1 Description of the product .................................................................................................................................37
6.2 Anticipated noise levels ......................................................................................................................................38
6.3 Permissible forces and torques on the pump flanges (only BL pumps) .........................................................39
7 Installation and electrical connection................................................................................................40
7.1 Installation ............................................................................................................................................................40
7.2 Electrical connection ...........................................................................................................................................44
7.3 Anti-condensation heater connection ..............................................................................................................46
8 Commissioning .....................................................................................................................................46
8.1 Initial commissioning ...........................................................................................................................................46
9 Maintenance..........................................................................................................................................49
9.1 Air supply ..............................................................................................................................................................50
9.2 Maintenance tasks ...............................................................................................................................................50
10 Faults, causes and remedies................................................................................................................54
11 Spare parts ............................................................................................................................................54
12 Disposal .................................................................................................................................................56

English
Installation and operating instructions Wilo-CronoLine-IL, CronoTwin-DL, CronoBloc-BL 31
Installation and operating instructions
1 General information
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 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 Symbols and signal words 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
32 WILO SE 08/2016
Information that appears directly on the product, such as
• Direction of rotation arrow,
• Connection markings
• 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 due to electrical, mechanical and bacteriological
factors,
• Damage to the environment due to leakage of hazardous materials,
• Property damage,
• 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.
• Children should be supervised to ensure that they do not play with the
appliance.
• If hot or cold components on the product/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 a shaft seal) of hazardous fluids (e.g. explosive,
toxic or hot) must be conveyed away so that no danger to persons or
to the environment arises. National statutory provisions are to be
complied with.
• Highly flammable materials are always to be kept at a safe distance
from the product.
• Danger from electrical current must be eliminated. Local directives or
general directives [e.g. IEC, VDE etc.] and instructions from local
energy supply companies must be adhered to.

English
Installation and operating instructions Wilo-CronoLine-IL, CronoTwin-DL, CronoBloc-BL 33
2.6 Safety instructions for installation
and maintenance 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 on the product/unit must only be carried out when at a stand-
still. It is mandatory that the procedure described in the installation
and operating instructions for shutting down the product/unit be
complied 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 operational reliability of the supplied product is only guaranteed
for conventional use in accordance with chapter 4 of the installation
and operating instructions. The limit values must on no account fall
under or exceed those values 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
protected against dirt and moisture.
Transport inspection On arrival, inspect the pump immediately for any transport damage.
If transport damage is detected, the necessary steps involving the
carrier must be taken within the specified period.
Storage Before installation, the pump must be kept dry, frost-free and
protected from mechanical damage.
If available, leave the covers on the pipe connections so that no dirt
and other foreign matter can get into the pump housing.
Rotate the pump shaft once a week to prevent scoring at the bearings
and sticking. Consult Wilo about which corrosion-proofing measures
are to be carried out in the event of a long storage time.
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
packaging.
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 lifting gear.
This must be secured to the pump flanges and, if necessary, to the
outer diameter of the motor (protection against slipping is
required!).
• To lift with a crane, the pump must be supported by suitable belts,
as shown. Place the belt around the pump in loops which tighten
from the pump’s own weight.

English
34 WILO SE 08/2016
• The transport eyes on the motor are only for guiding while bearing
the load (Fig. 6).
• The transport eyes on the motor are only for transporting the
motor, and are not approved for transporting the complete pump
(Fig. 7).
WARNING! Risk of injury!
Setting up the pump without securing it can lead to personal injury.
• Do not place the pump unsecured on the pump support feet. The
base with the threaded holes is used for attachment only. When
standing freely, the pump might not be sufficiently stable.
DANGER! Risk of fatal injury!
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
falling.
• Never stand underneath a suspended load.
• Make sure the pump is securely positioned and is stable during
storage and transport as well as prior to all installation and other
assembly work.
4 Intended use
Purpose The glanded pumps of the IL (in-line single pump), DL (in-line double
pump) and BL (monobloc pump) series are meant to be used as circu-
lators in building services.
Fields of application They may be used for:
• Hot-water heating systems
• Cooling and cold water circulation systems
• Process water systems
• Industrial circulation systems
• Heat carrier circuits
Contraindications Typical installation locations are technical rooms within the building
with other domestic installations. No provision has been made for
direct installation of the device in rooms used for other purposes
(residential and work rooms).
For these series, it is possible to set them up outdoors only in their
corresponding, special version, on request (see chapter 7.3 "Anti-
condensation heater connection" on page 46).
CAUTION! Risk of property damage!
Non-permitted substances in the fluid can destroy the pump.
Abrasive solids (e.g. sand) increase pump wear.
Pumps without an Ex rating are not suitable for use in potentially
explosive areas.
• Intended use includes compliance with this manual.
• Any other use is regarded as non-compliant with the intended use.
Fig. 6: Transporting the pump
Fig. 7: Transporting the motor

English
Installation and operating instructions Wilo-CronoLine-IL, CronoTwin-DL, CronoBloc-BL 35
5 Product information
5.1 Type key The type key consists of the following elements:
5.2 Technical data
Example: IL 80/130-5,5/2
DL80/130-5,5/2
BL 65/130-5,5/2
IL
DL
BL
Flange-end pump as In-line single pump
Flange-end pump as in-line Double pump
Flange-end pump as Bloc pump
80 Nominal diameter DN of the pipe connection
(for BL: pressure side) [mm]
130 Nominal impeller diameter [mm]
5.5 Rated power P2 [kW]
2 Number of poles, motor
Property Value Remarks
Rated speed 50 Hz version
• IL/DL/BL (2-/4-pole):
2900 or 1450 rpm
• IL (6-pole): 725 rpm
Depending on pump type
60 Hz version
• IL/DL/BL (2-/4-pole):
3480 or 1750 rpm
Depending on pump type
Nominal diameters DN IL: 32 to 200 mm
DL: 32 to 200 mm
BL: 32 to 150 mm (pressure side)
Pipe and pressure measurement connec-
tions
PN 16 flange in accordance with
DIN EN 1092-2
with pressure measurement
connections Rp 1/8 in accordance
with DIN 3858
Permissible min./max. fluid temperature -20 °C to +140 °C Depending on fluid
Ambient temperature min./max. 0 to +40 °C Lower or higher ambient
temperatures on request
Storage temperature min./max. -20 °C to +60 °C
Maximum permitted operating pressure 16 bar (version... -P4: 25 bar) Version...-P4 (25 bar) as special
version at additional charge (avail-
ability depends on the pump type)
Insulation class F
Protection class IP55
Approved fluids Heating water according to VDI 2035
Process water
Cooling/cold water
Water/glycol mixture up to 40 Vol.-%
Standard version
Standard version
Standard version
Standard version
Heat transfer oil Special version or auxiliary equip-
ment (at additional charge)
Other fluids (on request) Special version or auxiliary equip-
ment (at additional charge)
Table 1: Technical data

English
36 WILO SE 08/2016
Fluids If water-glycol mixtures are used (or fluids with a viscosity other than
that of pure water), an increase in power consumption of the pump is
to be taken into account. Only use mixtures with corrosion protection
inhibitors. Observe the relevant manufacturer specifications.
• Adjust the motor power if required.
• The fluid must be sediment-free.
• Wilo’s approval must be obtained for the use of other fluids.
• In systems built according to the state of the art, it can be assumed
under normal system conditions that the standard seal/standard
mechanical seal is compatible with the fluid. Special circumstances
(e.g. solid material, oils or EPDM-corrosive substances in the fluid, air
in the system etc.) may require special seals.
NOTE:
Always read and follow the material safety data sheet for the fluid
being pumped!
5.3 Scope of delivery • Pump IL/DL/BL
• Installation and operating instructions
5.4 Accessories Accessories must be ordered separately:
• PTC thermistor tripping unit for switch cabinet installation
• IL/DL: 3 mounting brackets with fixation material for installation
on a base
• DL: Blind flange for repair work
• BL: For installation on a base or baseplate for rated power of 5.5 kW
and above
For a detailed list, consult the catalogue and spare parts
documentation.
Electrical connection 3~ 400 V, 50 Hz Standard version
3~ 230 V, 50 Hz
(up to 3 kW inclusive)
Alternative application for stand-
ard version (no additional charge)
3~ 230 V, 50 Hz
(from 4 kW)
Special version or auxiliary equip-
ment (at additional charge)
3~ 380 V, 60 Hz partially standard version
Special voltage/frequency Pumps with motors with different
voltages or with other frequencies
are available on request.
Special version or auxiliary equip-
ment (at additional charge)
PTC thermistor sensor standard version from 75 kW
Speed control, pole switchover Wilo control devices
(e.g. Wilo-CC/SC-HVAC-System)
Standard version
Pole switchover Special version or auxiliary equip-
ment (at additional charge)
Explosion protection (EEx e, EEx de) up to 37 kW Special version or auxiliary equip-
ment (at additional charge)
Property Value Remarks
Table 1: Technical data

English
Installation and operating instructions Wilo-CronoLine-IL, CronoTwin-DL, CronoBloc-BL 37
6Descriptionandfunction
6.1 Description of the product All the pumps described are single-stage low-pressure centrifugal
pumps in compact construction design with a coupled motor. The
mechanical seal is maintenance-free. The pumps can be installed
both directly as a pipe installation pump in a sufficiently anchored
pipe or placed on a foundation base. Installation options depend on
the size of the pump. In conjunction with a control device (e.g. Wilo-
CC/SC-HVAC-System), performance of the pumps can also be con-
tinuously controlled. This allows optimisation of the pump output for
the demands of the installation and economically efficient pump
operation.
Version IL:
The pump housing has an in-line design, i.e. the flanges on the suc-
tion and pressure sides lie along a centre line (Fig. 8). All pump hous-
ings are provided with pump support feet. Installation on a foundation
base is recommended for rated powers of 5.5 kW and higher.
Version DL:
Two pumps are arranged in a shared housing (double pump). The
pump housing has an in-line design (Fig. 9). All pump housings are
provided with pump support feet. Installation on a foundation base is
recommended for rated powers of 4 kW and higher.
The base-load pump is only operated in control operation in conjunc-
tion with a control device. The second pump is available to fulfil full
load operation requirements as an auxiliary peak load. Moreover, the
second pump can adopt the reserve function in the event of a fault.
NOTE:
Blind flanges, which allow the motor impeller unit to be replaced even
in double pump housing, are available (see chapter 5.4 "Accessories"
on page 36) for all pump types/frame sizes in the DL series (Fig. 9 to
the right). A drive can therefore remain in operation while replacing
the motor impeller unit.
NOTE:
To ensure operational standby of the standby pump, operate the
standby pump every 24 h at least once a week.
Version BL:
Spiral housing pump with flange dimensions in accordance with
DIN EN 733 (Fig. 10). Depending on the construction:
Up to 4 kW motor power: pedestal screwed onto the pump or cast
feet on the pump housing.
From 5.5 kW motor power: motors with cast or screwed on feet.
Version in design B: With cast feet on the pump housing.
Fig. 8: View of IL
Fig. 9: View of DL
Fig. 10: View of BL

English
38 WILO SE 08/2016
6.2 Anticipated noise levels
Motor power
PN[kW]
Sound-pressure level Lp, A [dB (A)] 1)
2900 rpm 1450 rpm 725 rpm
IL, BL, DL
(DL in individual
operation)
DL
(DL in parallel
operation)
IL, BL, DL
(DL in individual
operation)
DL
(DL in parallel
operation)
IL, BL
0.55 57 60 45 48 -
0.75 60 63 51 54 -
1.1 60 63 51 54 -
1.5 64 67 55 58 -
2.2 64 67 60 63 -
3 66 69 55 58 -
4 68 71 57 60 -
5.5 71 74 63 66 -
7.5 71 74 63 66 65
11 72 75 65 68 65
15 72 75 65 68 -
18.5 72 75 70 73 -
22 77 80 66 69 -
30 77 80 69 72 -
37 77 80 70 73 -
45 72 - 72 75 -
55 77 - 74 77 -
75 77 - 74 - -
90 77 - 72 - -
110 79 - 72 - -
132 79 - 72 - -
160 79 - 74 - -
200 79 - 75 - -
250 85 - - - -
1) Spatial mean value of sound-pressure levels on a square measuring surface at a distance of 1 m from the surface of the motor.
Table 2: Anticipated noise levels

English
Installation and operating instructions Wilo-CronoLine-IL, CronoTwin-DL, CronoBloc-BL 39
6.3 Permissible forces and torques on
the pump flanges (only BL pumps)
See Fig. 11 and list "Table 3: Permissible forces and torques on the
pump flanges" on page 39.
Values in acc. with ISO/DIN 5199 – class II (2002) – Appendix B,
Family no. 1A.
If not all working loads reach the maximum permitted values, one of
these loads may exceed the normal limit value under the condition
that following additional conditions are fulfilled:
• All force and torque components must be limited to 1.4 times of the
maximum permitted value.
• The following equation applies to the actual forces and torques acting
on every flange (the following condition must be fulfilled):
Where the total load ∑F and∑M is the arithmetic total of every
flange (inlet and outlet), for the actual as well as the maximum per-
mitted values, without taking into consideration their algebraic sign,
at the pump level (inlet flange + outlet flange).
Fig. 11: Permissible forces and torques on
the pump flanges – pump made of grey
cast iron
ZY
X
Y
X
Z
DN Forces F [N] Torques M [Nm]
FXFYFZΣForces F MXMYMZΣTorques M
Pressure port
32 315 298 368 578 385 263 298 560
40 385 350 438 683 455 315 368 665
50 525 473 578 910 490 350 403 718
65 648 595 735 1155 525 385 420 770
80 788 718 875 1383 560 403 455 823
100 1050 945 1173 1838 613 438 508 910
125 1243 1120 1383 2170 735 525 665 1068
150 1575 1418 1750 2748 875 613 718 1278
Suction port
50 578 525 473 910 490 350 403 718
65 735 648 595 1155 525 385 420 770
80 875 788 718 1383 560 403 455 823
100 1173 1050 945 1838 613 438 508 910
125 1383 1243 1120 2170 735 525 665 1068
150 1750 1575 1418 2748 875 613 718 1278
200 2345 2100 1890 3658 1138 805 928 1680
Table 3: Permissible forces and torques on the pump flanges
max.permitted max.permitted
actual actual

English
40 WILO SE 08/2016
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 accident prevention regulations!
DANGER! Risk of fatal injury!
Failure to install safety devices on the terminal box or near the
coupling can cause electrical shock or contact with rotating parts,
potentially resulting in life-threatening injuries.
• Before commissioning, all safety devices such as coupling covers
that were removed must be reinstalled.
DANGER! Risk of fatal injury!
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
falling.
• Never stand underneath a suspended load.
• Make sure the pump is securely positioned and is stable during
storage and transport as well as prior to all installation and other
assembly work.
CAUTION! Risk of property damage!
Risk of damage due to incorrect handling.
• Have the pump installed by qualified personnel only.
CAUTION! Damage to the pump due to overheating!
The pump must not be allowed to operate dry for more than
1 minute. Dry running causes a build-up of energy in the pump,
which can damage the shaft, impeller, and mechanical seal.
• Make sure that the volume flow Qmin does not fall below the
minimum value.
Calculation of Qmin:
7.1 Installation
Preparation • The pump has to be checked for compliance with the specifications
on the delivery receipt; any damages or missing parts must be con-
veyed to Wilo immediately. Check slat crates/boxes/wrappings for
spare parts or accessory components which could be included with
the pump.
• 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.
Installation location • The pumps must be protected from the weather and installed in a
frost/dust-free,well-ventilatedand vibration-insulatedenvironment
which is not potentially explosive.
• Install the pump in a place that is easy to access so that later inspec-
tions, maintenance (e.g. the mechanical seal) or replacement is easily
possible.
• Provide space for minimum axial distance between a wall and the fan
cover of the motor: Free removal dimension of at least 200 mm +
diameter of the fan cover.
Qmin = 10 % x Qmax pump

English
Installation and operating instructions Wilo-CronoLine-IL, CronoTwin-DL, CronoBloc-BL 41
Base • For a vibration-insulated installation, a simultaneous isolation of the
base block itself from the building structure by an elastic intermediate
layer (e.g. cork or Mafund pad) is required for few pump types.
CAUTION! Risk of property damage!
Danger of damage due to unsuitable foundation/incorrect
handling.
• A missing base or an incorrect installation of the unit on the base
can lead to a malfunction of the pump; this is excluded from the
guarantee.
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 property damage!
Risk 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 lifting gear (see chapter 3 "Trans-
port and interim storage" on page 33).
• Shut-off devices shall be installed in front of and behind the pump, in
order to avoid having to drain the entire system when checking, ser-
vicing or replacing the pump. If need be, the necessary non-return
valves are to be provided.
• The lantern has an opening on the underside which allows a drainage
pipe for condensation water/condensate to be connected (e.g. when
used in air-conditioning or cooling systems). The condensate gener-
ated can then be effectively drained.
•Installation position: All installation positions except for “motor
facing down” are allowed.
• The air vent valve (Fig. 1/2/3/4/5, item 1.31) must always face
upwards.
NOTE:
The installation position with horizontal motor shaft is permitted
for the IL and DL series only up to a motor power of 15 kW (Fig. 12).
A motor support is not necessary. Only the installation position with
vertical motor shaft is intended for a motor power > 15 kW. BL series
monobloc pumps are to be mounted on a sufficiently strong base or
mounting brackets (Fig. 13).
• For pumps of BL type, the motor must be supported from a motor
power of 18.5 kW, see installation examples BL (Fig. 14).
Only pump type design B: From 37 kW four pole or 45 kW two pole,
the pump housing and motor must be supported. Suitable supports
from the Wilo accessories range can be used for this purpose.
NOTE:
The motor terminal box must not face downward. If necessary,
the motor or motor impeller unit can be rotated once the hexagon
head screws have been loosened. While rotating the motor or motor
impeller unit, ensure that the housing O-ring seal does not become
damaged.
Fig. 12: IL/DL
DL
IL
Fig. 13: BL

English
42 WILO SE 08/2016
Fig. 14: Installation examples BL
min. 5mm
min. 5mm
min. 5mm
min. 5mm
No
support
required
Pump housing
supported
Motor supported
Pump housing
supported, motor
attached
to a foundation
Pump housing
and motor
supported

English
Installation and operating instructions Wilo-CronoLine-IL, CronoTwin-DL, CronoBloc-BL 43
CAUTION! Risk of property damage!
Risk of damage due to incorrect handling.
• When pumping out a tank, ensure that the fluid level is always high
enough above the suction port of the pump so that the pump never
runs dry. The minimum inlet pressure must be observed.
NOTE:
In the case of insulated systems, only the pump housing may be
insulated, not the lantern and motor.
Example of a foundation screwed connection (Fig. 15):
• Align the whole unit when installing on the foundation with the help
of the spirit level (at the shaft/pressure port).
• Always put the washers (B) to the left and right directly at the fixation
material (e.g. stone bolts (A)) between the baseplate (E) and founda-
tion (D).
• Evenly and firmly tighten the fixation material.
• For distances > 0.75 m, support the baseplate at the centre between
the fixation elements.
Connection of the pipes CAUTION! Risk of property damage!
Risk of damage due to incorrect handling.
• Under no circumstances may the pump be used as a fixed point for
the pipe.
• The present NPSH of the system always has to be greater than the
required NPSH of the pump.
•Theforcesandtorques being exerted by the pipe system on the pump
flange (e.g., by warping, thermal expansion) may not exceed the per-
mitted forces and torques.
• Brace the pipes directly before the pump and connect them without
tension. Their weight must not put a strain on the pump.
• The inlet pipe is to be kept as short as possible. Lay the inlet pipe to
the pump so that it continuously rises while the intake falls. Avoid
possible air entry points.
• If a dirt trap in the inlet pipe is required, then its free cross-section has
to be 3 – 4 times the cross-section of the piping.
• For short pipes, the nominal diameters should be at least that of the
pump connections. The long pipes, the most economical nominal
diameter is to be determined on a case-by-case basis.
• Adapters for larger nominal diameters should be made with a flaring
angle of about 8° to prevent greater pressure losses.
NOTE:
A settling section must be provided before and after the pump, in the
form of a straight pipe. The lengthof this settling section should be at
least 5 x DN (5 times of the nominal diameter) of the pump flange
(Fig. 16). This measure serves to avoid flow cavitation.
• Remove the flange covers at the suction and pressure ports of the
pump before attaching the piping.
Fig. 15: Example of a foundation screwed
connection
DC E AB
Fig. 16: Settling section in front of and behind the
pump
r
5 x DN
d s
r ≈2,5 * (d-2s)