Wilo H Series User manual

DEinbau- und Betriebsanleitung
GB Installation and operating instructions
FNotice de montage et de mise en service
NL Inbouw- en bedieningsvoorschriften
Wilo-Hauswasserwerke Hxx
Wilo domestic water systems Hxx
Stations de pompage domestiques Wilo Hxx
Wilo-huishoudwaterinstallaties Hxx
2 533 250-Ed.01/2010-11-Wilo

Fig. 1:
2
3
9
5
4
1
6
8
7
Fig. 2:
12 14
11
10
13 14
11

Fig. 3:
14
10
12 14

Fig. 4a Fig. 4b
Fig. 5a Fig. 5b
Fig. 6a Fig. 6b
1
2
3
4
5
1
4
2
3
5
1
4
2
3
5
1
2
3
4
5
pa [bar]
pe [bar]
pa [bar]
pe [bar]

Fig. 7a Fig. 7b Fig. 7c
Fig. 8

English
Installation and operating instructions Wilo domestic water systems Hxx 19
1 General.................................................................................................................................................. 21
2 Safety .................................................................................................................................................... 21
2.1 Indication of instructions in the operating instructions ................................................................................. 21
2.2 Personnel qualifications ..................................................................................................................................... 21
2.3 Danger in the event of non-observance of the safety instructions .............................................................. 21
2.4 Safety instructions for the operator ................................................................................................................. 21
2.5 Safety instructions for inspection and installation work ............................................................................... 22
2.6 Unauthorised modification and manufacture of spare parts ......................................................................... 22
2.7 Improper use ........................................................................................................................................................ 22
3 Transport and interim storage ........................................................................................................... 22
4 Application (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 (optional) ......................................................................................................................................... 23
6 Description and function .................................................................................................................... 23
6.1 Description of the product ................................................................................................................................. 23
6.2 Function of the product ...................................................................................................................................... 23
7 Installation and electrical connection ............................................................................................... 24
7.1 Installation ........................................................................................................................................................... 24
7.2 Electrical connection .......................................................................................................................................... 24
8 Commissioning..................................................................................................................................... 25
8.1 Check the diaphragm pressure vessel .............................................................................................................. 25
8.2 Filling and bleeding ............................................................................................................................................. 26
8.3 Setting the pressure switch ............................................................................................................................... 26
9 Maintenance ......................................................................................................................................... 29
10 Faults, causes and remedies ............................................................................................................... 29
11 Spare parts............................................................................................................................................ 30

English
20 WILO SE 11/2010
Installation and operating instructionsWilo domestic water systems Hxx
Captions:
Fig. 1 Structure
1Pump
2 Filling screw
3Drainagescrew
4 Diaphragm pressure vessel
5 Pressure gauge
6 Mains cable with plug (EM only)
7Pressureswitch
8 Flexible pressure hose
9 Gas filling valve
L2/P1 Spacings between fastening holes
Fig. 2 Inlet mode
AIntakefromtank
B Intake from water supply system
10 Spring-mounted foot valve
11 Check valve on intake/suction side
12 Check valve on the pressure side
13 Non-return valve
14 Pipe attachment
Fig. 3 Suction mode
10 Foot valve
12 Check valve on the pressure side
14 Pipe attachment
Fig. 4a
and 4b
Pressure switch EM (type PM)
1 Adjusting screw for switch-off pressure
2 Adjusting screw for pressure difference
(switch-off pressure – switch-on pressure)
3 Supply line/connections motor
4 Supply line/connections system
5 Connections earthing (PE)
Fig. 5a
and 5b
Pressure switch DM (type PT)
1 Adjusting screw for switch-off pressure
2 Adjusting screw for pressure difference
(switch-off pressure – switch-on pressure)
3 Supply lines/connections motor
4 Supply lines/connections system
5 Connections earthing (PE)
Fig. 6a
and 6b
Pressure switch diagrams
Fig. 6a Pressure switch (type PM5/PT5)
Fig. 6b Pressure switch (type PM12/PT12)
po
[bar]
Switch-off pressure
pi
[bar]
Start-up pressure
Figs. 7
a to 7c
Checking gas preliminary pressure diaphragm
pressure vessel
Fig. 7a Depressurise domestic water system
Fig. 7b Remove valve flap
Fig. 7c Measure gas preliminary pressure
Fig. 8 Version EM connection diagram for optional
float switch
1 Motor terminal box
2Pressureswitch
3Optionalfloatswitch
4 Additional connection terminals

English
Installation and operating instructions Wilo domestic water systems Hxx 21
1 General
About this document
The language of the original operating instruc-
tions is German. All other languages of these
instructions are translations of the original oper-
ating instructions. These installation and operat-
ing 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 relevant 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 without our agreement, this declara-
tion loses its validity.
2Safety
These operating instructions contain basic infor-
mation which must be adhered to during installa-
tion and operation. For this reason, these operat-
ing instructions must, without fail, be read by the
service technician and the responsible 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 from 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 (serious) injury to persons is proba-
ble 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.
2.2 Personnel qualifications
The installation personnel must have the appro-
priate qualifications for this work.
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 product/unit. Non-observance of the safety
instructions can result in the loss of any claims to
damages.
In particular, lack of care may lead to problems
such as:
• Failure of important product/unit functions,
• Failure of required maintenance and repair proce-
dures,
• Danger to persons from electrical, mechanical and
bacteriological influences,
• Property damage.
2.4 Safety instructions for the operator
The existing directives for accident prevention
must be adhered to.
Danger from electrical current must be eliminated.
Local directives or general directives [e.g. IEC, VDE
etc.] and local power supply companies must be
adhered to.
This appliance is not intended for use by persons
(includingchildren)withreducedphysical, sensory
or mental capabilities, or lack of experience and
knowledge, unless they have been given supervi-
sion 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.

English
22 WILO SE 11/2010
2.5 Safety instructions for inspection and
installation work
The operator must ensure that all inspection and
installation work is carried out by authorised and
qualified personnel, who are sufficiently informed
from their own detailed study of the operating
instructions.
Work on the product/unit must only be carried out
when at a standstill. It is mandatory that the pro-
cedure described in the installation and operating
instructions for shutting down the product/unit
be complied with.
2.6 Unauthorised modification and manufacture of
spare parts
Modifications to the product are only permissible
after consultation with the manufacturer. Original
spare parts and accessories authorised by the
manufacturer ensure safety. The use of other
parts can nullify the liability from the results of
their usage.
2.7 Improper use
The operating safety of the supplied product is
only guaranteed for conventional use in accord-
ance with Section 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
When you receive the domestic water system,
immediately check it for transport damage. If you
discover transport damage, discuss with the cou-
rier company what measures to take, complying
with the relevant notification deadlines!
CAUTION! Risk of damaging the domestic water
system!
Danger of damage due to incorrect handling
during transportation and storage.
The domestic water system must be protected
against moisture, frost and mechanical damage
when in transit. The domestic water system must
never be exposed to temperatures beyond the
range -10 °C to +50 °C during transport or stor-
age.
4 Application (intended use)
With its series of different domestic water sys-
tems, Wilo is offering water-supply units for
domestic, DIY and garden applications. Depending
on the pump used, the domestic water systems
are suitable for:
• pumping water out of containers, ponds, streams
and wells, for water supply, irrigation, sprinkling
and spraying in the domestic context.
Non-self-primingorself-priming pumpsare used,
depending on the application.
Non-self-priming pumps which can operate in
inlet mode (e.g. from an open container) but are
not self-priming, are allowed to be connected to
the public water supply system directly (Fig. 2).
Self-priming pumps are equipped with air separa-
tion technology in the pump hydraulics, which
enables them to evacuate air from a suction pipe
(e.g. from a well) (Fig. 3). These are not allowed to
be connected to the public water supply system,
in order to avoid any negative effect on the mains
pressure.
Permitted fluids:
• Water without any solid or sedimentary particles
(process water, refrigerating water, cooling water
and rainwater)
Use with other fluids or additives requires
approval from Wilo
5 Product information
5.1 Type key
Example: HMC 304 EM
H= Domestic water system with pump
MC
MP
WJ
MHI
Pump type
= Wilo-MultiCargo
= Wilo-MultiPress
= Wilo-Jet
= Wilo-Economy MHI
2
3
4
6
= Rated volume flow Q in m³/h
02
03
04
05
06
= Number of hydraulic stages
EM
DM
= Alternating current 1 ~ 230 V
= Three-phase current 3 ~ 400 V

English
Installation and operating instructions Wilo domestic water systems Hxx 23
5.2 Technical data
For the precise connection and performance data,
please refer to the rating plates on the pump and
the motor.
5.3 Scope of delivery
• Domestic water system acc. to identification
• Installation and operating instructions
(domestic water system and pump acc. to type)
•Packaging
5.4 Accessories (optional)
•Footvalve
•Suctionfilter
•Suctionhose
• Floating extractor with or without non-return
valve
•Floatswitch
• Switchgear with submersible electrode
6 Description and function
6.1 Description of the product
The domestic water system is supplied as a preas-
sembled and wired-up unit.
Its principal components are as follows
(see Fig. 1):
• Pump (no. 1)
• Filling screw (no. 2)
• Drainage screw (no. 3)
• Diaphragm pressure vessel (no. 4)
• Pressure gauge (no. 5)
• Mains cable with plug (EM version only) (no. 6)
• Pressure switch (no. 7)
• Flexible pressure hose (no. 8)
• Gas filling valve of the diaphragm pressure vessel
(no. 9)
The parts that come into contact with the fluid are
made from a corrosion-resistant material. The
pump housing is sealed against the motor by
means of a mechanical shaft seal.
CAUTION! Danger of damage to the pump!
The pump must not run dry. Damage to the
pump due to running dry will not be covered by
the manufacturer's warranty.
To protect the domestic water system against
running dry, we recommend using appropriate
accessories such as a float switch, an additional
pressure switch or switchgear with level elec-
trodes.
CAUTION! Risk of damage to the domestic water
system!
Risk of damage due to incorrect handling during
transport and storage.
In AC motors (EM version), the thermal motor pro-
tection switches the motor off in case of overload.
Once the motor has cooled down, it switches back
on automatically.
6.2 Function of the product
The domestic water system is equipped with an
electrically driven centrifugal pump, a pressure
switch and a diaphragm pressure vessel.
The diaphragm pressure vessel is divided into a
water and a gas space by a diaphragm. The water
space is used for holding or outputting the fluid as
the pressure in the consumer line varies. The gas in
the gas space is compressed when fluid is drawn
in, and expands again when the fluid is output.
The pump increases the pressure and pumps the
fluid to the extraction points via the consumer
line. To do this, it is switched on and off according
to the pressure. The mechanical pressure switch is
used for monitoring the pressure in the consumer
line.As waterconsumptionincreases, thepressure
in the consumer line drops. When the switch-on
pressure set on the pressure switch is reached, the
domestic water system is switched on. As the
extraction decreases (the extraction points are
closed), the pressure in the consumer line rises.
The domestic water system is switched off when
the switch-off pressure set on the pressure switch
is reached.
Connection and technical data
Temperatureofthe
fluid: +5 °C to +35 °C
Max. ambient tem-
perature
+40°C
Suction head Depending on the pump type/
depending on NPSH (see separate
installationandoperatinginstructions
for the pump)
Suction connection Depending on the pump type (see
separate installation and operating
instructions for the pump)
Rp 1" to Rp 11/4"
Pressure connec-
tion
Rp 1"
Maximum operat-
ing pressure
Depending on the pump type (see
separate installation and operating
instructions for the pump)
6/8/10 bar
Mains connection See rating plate of the pump/motor
1~230 V/50 Hz
1~220 V/60 Hz
3~230-400 V/50 Hz
3~220/380 V to 3~254/440 V/ 60 Hz
Delivery head See rating plate
Volume flow See rating plate
Switch-on/switch-
off pressure
See rating plate
Volume of the dia-
phragm pressure
vessel
See rating plate
Gas supply pres-
sure of the dia-
phragm pressure
vessel
See rating plate and Table 1
(section 8.1)
Weight See rating plate

English
24 WILO SE 11/2010
The function of the diaphragm pressure vessel
influences the switching frequency. The fre-
quency of switching procedures decreases as the
tank volume increases.
In order to optimise the switching procedures, set
a gas supply pressure in the diaphragm pressure
vessel that is appropriate for the switch-on pres-
sure (acc. to Table 1, section 8).
7 Installation and electrical connection
7.1 Installation
The domestic water system must be installed and
operated acc. to local regulations. It must be
installed in an enclosed, dry, well ventilated room
that is protected against frost. The installation
room must be provided with floor drainage with an
adequate capacity, connected to the drainage
system of the building. Follow-on damage that
can be caused by failure of the domestic water
system, such as flooding of rooms, shall be pre-
cluded by the end-user by taking suitable meas-
ures (e.g. installing a fault signalling system or an
automatic drainage system. Suction and pressure
pipes shall be installed onsite. In case of fixed or
stationary installation, the domestic water system
shall be attached to the floor onsite. The installa-
tion surface must be horizontal and flat. Space
shall be allowed for maintenance work.
NOTE:
Never install the domestic water system on an
uneven bearing surface!
To avoid structure-borne noise transmission, the
domestic water system must be connected to the
suction and pressure pipes via flexible hose
adapters. In case of additional onsite attachment
to the ground, make sure that suitable measures
are provided in order to avoid structure-borne
noise transmission (e.g. by a cork pad, vibration
absorbers or the like). Appropriate holes are pro-
vided in the mounting feet of the domestic water
systems so that it can be secured to the ground
(see Fig. 1, L2 and P1).
7.1.1 Domestic water system in inlet mode (Fig. 2)
A non-self-priming pump is supplied with water
via the inlet connection. The water supply can be
from the public water supply system or a container
located at a higher level.
CAUTION!
In order to guarantee correct operation, the
pumps require the water supply to be at least
300 mm away, i.e. the consumer line must be
routed upwards and start at least 300 mm away
from the pump.
Suitable stop valves shall be installed in the inlet
pipe and the consumer line (Fig. 2, no. 11 or 12).
The inlet pipe shall be provided with a non-return
valve (Fig. 2, no. 13) or a spring-mounted foot
valve (Fig. 2, no. 10). The diameter of the inlet
pipe is not allowed to be less than the diameter of
the pump's suction connection.
To avoid stresses being communicated by the
weight of the piping, the piping must be secured
tothe structure using suitableattachmentdevices
(Fig.2,no.14).
7.1.2 Domestic water system in suction mode (Fig. 3)
With a self-priming pump or a non-self-priming
pump operating in suction mode from containers
on a lower level, it is necessary to install a sepa-
rate, vacuum and pressure-resistant suction line
with foot valve (Fig. 3, no. 10). This must be
installed continuously rising from the container to
the pump connection on the on suction side. The
foot valve shall be positioned so as to achieve a
distance of 100 mm from the base of the con-
tainer and a minimum water coverage of 200 mm
at the lowest possible water level. In all cases, it is
recommended for a suction hose set (comprising a
suction hose and foot valve) to be used. A floating
extractor should be installed in order to prevent
coarse contaminants being sucked in from the
base area of the container.
Suitable stop valves shall be installed in the con-
sumer line (Fig. 3, no. 12).
All connection lines shall be installed on the sys-
tem without tension, using detachable connec-
tions. The weight of the connection lines must be
secured to the structure using suitable attach-
ment devices (Fig. 3, no. 14).
7.2 Electrical connection
DANGER! Danger of death!
Electrical connection must be carried out by an
electrician authorised by the local electricity
supply company and in accordance with the
applicable local regulations [e.g. VDE regula-
tions].
It is recommended for the domestic water system
to be connected via a residual-current-operated
protection switch. The appropriate regulations
acc. to VDE 0100 Part 702 shall be complies with
for use in swimming pools and garden ponds.
Mains connection:
•EMversion:
Connection via connecting cable with
plug(Fig.1,no.6)
• DM version: Connection by onsite connecting
cable (for diagram, see Fig. 5b)
• The cover of the pressure switch must be
removed for this purpose (Fig. 5)
• A four-core cable must be routed to the termi-
nals R-S-T (phases) and the earthing connec-
tion (green/yellow)
• The domestic water system is only allowed to
be operated with an electrical connecting cable
(including extension cable) which has at least
a rubber sheath of type H07 RNF acc. to
DIN 57282 or DIN 57245.
The electrical plug connections shall be installed
where they are protected against overflowing
water and against moisture. The electrical system
shall be installed acc. to the specifications in the
corresponding operating instructions. The techni-
cal data of the circuits to be connected shall be

English
Installation and operating instructions Wilo domestic water systems Hxx 25
checked to ensure compliance with the electrical
data of the domestic water system. The rating
plate data of the pump motor shall be complied
with for this purpose.
The mains fuse shall be a 10 A slow-blow fuse.
DANGER! Danger of death!
As a protective measure, the electrical system
shall be correctly earthed (i.e. in accordance
with the local regulations and conditions. Con-
nections provided for this purpose are marked
accordingly (earthing terminal on motor).
An electrical short-circuit would damage the
motor. The cables are never allowed to touch
the pipework or the domestic water system, and
they must be protected against moisture.
NOTE:
Never lift, transport or secure the domestic water
system by the mains connection cable. Do not
spray water directly at the pump.
Only for EM version:
When using an additional float switch,for example
for switching off the domestic water system in
case of low water, it must be connected according
to the diagram (Fig. 8, no. 3).
8 Commissioning
To avoid the pump running dry, it is necessary to
check before commissioning that there is enough
water in the open supply container or the well, or
that the supply pressure in the inlet pipe is at least
0.3 bar.
If a float switch or electrodes are used for protect-
ing against running dry, they must be positioned
so that the domestic water system switches off at
a water level which would result in air being
sucked in.
CAUTION!
The pump must not run dry. Dry running, even
for a short period, can result in damage to the
mechanical shaft seal. The manufacturer's war-
ranty does not cover damage to the pump
caused by running dry.
8.1 Check the diaphragm pressure vessel
In order for the domestic water system to operate
correctly, it is necessary to have a gas supply pres-
sure in the diaphragm pressure vessel that is
appropriate forthe switch-on pressure. In the fac-
tory setting, the gas space of the diaphragm pres-
sure vessel is filled with nitrogen and set to a
particular supply pressure (see rating plate). The
gas pressure should be checked again before
commissioning and after changes to the pressure
switch settings. For this purpose, the domestic
water system must be de-energised and the dia-
phragm pressure vessel depressurised on the
water side. The gas supply pressure shall be
checked on the gas filling valve of the diaphragm
pressure vessel (Fig. 1, no. 9) by means of an air
pressure measuring instrument (Figs. 7a to 7c).
DANGER! Risk of suffocation by nitrogen!
Measuring, replenishing and venting of nitrogen
at the diaphragm pressure vessel is only allowed
to be performed by qualified specialist person-
nel.
DANGER! Risk of injury!
Excessive gas supply pressure can lead to
destruction of the diaphragm pressure vessel.
The maximum permitted operating pressure on
the rating plate is not allowed to be exceeded.
The gas supply pressure must be monitored by
measuring during the filling procedure. When
measuring instruments with different scale
divisions (unit of dimension) are used, it is
essential to comply with the instructions for
converting! Comply with the general safety reg-
ulations for working with pressure vessels.
The value of the gas supply pressure (PN2) should
be approx. the pump switch-on pressure (pE) less
0.2-0.5 bar (or pump switch-on pressure less
10%) (see Table 1)!
If the gas supply pressure is too low, it must be
corrected by replenishing gas. When replenishing,
it is recommended that nitrogen should be used
because this gas minimises the risk of corrosion in
the container, as well as preventing losses through
diffusion. If the gas supply pressure is too high,
correct it by venting gas from the valve.

English
26 WILO SE 11/2010
Table 1:
Gas supply pressure PN2 diaphragm pressure ves-
sel in relation to the switch-on pressure pE
Conversion of pressure units:
1 bar = 100000 Pa = 0.1 MPa = 0.1 N/mm²
= 10200 kp/m² = 1.02 kp/cm² (at)
1 bar = 0.987 atm = 750 Torr = 10.2 m/Ws
8.2 Filling and bleeding
Only a completely filled pump without air inclu-
sions can draw in fluid optimally. Perform filling
and bleeding as follows:
a) Pump with inlet pressure (Fig. 2)
• Close stop valve on the pressure side (Fig. 2,
no. 12)
• Undo filling/vent screw (Fig. 1, no. 2)
• Slightly open stop valve on the intake side
(Fig. 2, no. 11), until water emerges from the
filler opening and the pump is completely bled.
WARNING! Risk of scalding!
Depending on the temperature of the fluid and
the system pressure, when the vent screw is
opened completely, hot or gaseous fluid may
escape or shoot out at high pressure.
• Screw the filler screw back in tightly when the
water emerges free from bubbles
• Open the stop valve on the pressure side (Fig. 2,
no. 12)
• Continue commissioning with the pressure switch
setting
b) Self-priming pump in suction mode (Fig. 3)
(maximum suction head 8 m)
• Open the check valve on the pressure side (Fig. 3,
no. 12)
• Remove the filler screw (Fig. 1, no. 2)
• Using a funnel, slowly and completely fill the
pump at the filler opening, until water emerges
from the opening
• Screw the filler screw back in tightly when the
water emerges free from bubbles
• Continue commissioning with the pressure
switch setting
WARNING! Risk of burns!
The entire system may get very hot, depending
on the operating status of the domestic water
system (temperature of the fluid). Risk of burns
on contact!
NOTE:
This pump is not allowed to be operated for more
than 10 minutes with volume flow Q = 0 m3/h
(closed stop valve)
c) Non-self-priming pump in suction mode (Fig. 3)
(max. suction head HA = 7 m)
• Open check valve on the pressure side (Fig. 3,
no. 12)
• Remove filler screw (Fig. 1, no. 2)
• Using a funnel, slowly and completely fill the
pump at the filler opening, until water emerges
from the opening
• Screw the filler screw back in tightly when the
water emerges free from bubbles
• Start the domestic water system briefly (approx.
20 sec.) so that the air will collect in the pump
housing.
• Switch off the domestic water system
• Repeat the filling procedure until the pump and
suction line have been completely bled.
• Continue commissioning with the pressure switch
setting
WARNING! Risk of burns!
The entire system may get very hot, depending
on the operating status of the domestic water
system (temperature of the fluid) Risk of burns
on contact!
NOTE:
The pump is not allowed to be operated for more
than 10 minutes with volume flow Q = 0 m3/h
(closed stop valve).
Rotation direction monitoring (only for three-
phase AC motor version DM): Switch on briefly to
check whether the sense of rotation of the pump
matches the arrow on the pump housing. If the
sense of rotation is wrong, swap over 2 phases in
the terminal box of the pump.
DANGER! Danger of death!
Electrical connection must be carried out by an
electrician authorised by the local electricity
supply company and in accordance with the
applicable local regulations [e.g. VDE regula-
tions].
8.3 Setting the pressure switch
NOTE:
The switch-on and switch-off pressures of the
pressure switch have been factory-set according
to the characteristic curve of the pump used
(see rating plate).
To adapt to local conditions, it is possible to
change or adapt the settings of the pressure
switch as follows.
The switch-off pressure (setscrew Fig. 4a/4b,
no. 1 or 5a/5b, no. 1) and the pressure difference
(setscrew Fig. 4a/4b, no. 2 or 5a/5b, no. 2) are set
in relation to the switch-on pressure at the pres-
sure switch (version EM and DM).
pE
[bar] 22.5 33.5 44.5 55.5 6 6.5 7 7.5 88.5 99.5 10
PN2
[bar] 1.8 2.3 2.8 3.2 3.7 4.2 4.7 5.2 5.7 6.1 6.6 7.1 7.5 88.5 99.5

English
Installation and operating instructions Wilo domestic water systems Hxx 27
Close check valve on the pressure side
Establish electrical power supply
Domestic water system switches off within
a short time Domestic water system does not switch off
Check whether the switch-off pressure
displayed on the pressure gauge agrees with
the calculated value
Set switch-off pressure (routine 1)
Establish electrical power supply and check
the settings using the values displayed on
the pressure gauge
Switch-off pressure does not agree
with the system parameters
Set switch-off pressure (routine 1) Switch-off pressure does not agree with the
system parameters
Switch-off pressure agrees with the system parameters
Check gas supply pressure of the diaphragm vessel (see Table1: approx. pE - 0.2..0.5 bar or pE - 10%)
Gas supply pressure of the diaphragm vessel
agrees with the system parameters
Gas supply pressure of the diaphragm vessel does
not agree with the system parameters
Set gas supply pressure (routine 2)
Completely open the user point with the smallest extraction amount
Establish electrical power supply
Domestic water system switches on or
off less than once a minute
Domestic water system switches on or
off more often than once a minute
Increase difference between
switch-on pressure and switch-off
pressure (routine 3)
Establish electrical power supply and check
the settings using the values displayed on
the pressure gauge
Mount the pressure switch cover

English
28 WILO SE 11/2010
Setpoint of
switch-on pressure
reached
Shut off electrical power supply and
secure it to prevent it from being switched
back on without authorisation
Close check valve on the pressure side
(Routine1)
Settingswitch-off pressure
(Routine3)
Increasingdifferencebetween
switch-on pressure and
switch-off pressure
Depressurise domestic water system on
the draw-off point side:
Open check valve on the pressure side
and open nearest draw-off point
Shut off electrical power supply and
secure it to prevent it from being switched
back on without authorisation
Close check valve on the pressure side
Remove cover of the pressure switch
Establish electrical power supply and
observe reading on pressure gauge
Remove cover from pressure switch
Slowly open check valve on the pressure
side and observe pressure gauge
Close check valve on the pressure side
Turn pressure difference adjusting
screw clockwise until a clicking sound
can be heard
Shut off electrical
power supply and
secure it to prevent
it from being
switched back on
without
authorisation Slowly open
check valve on
the pressure
side and
observe
pressure gauge
Turn switch-off
pressure adjusting
screw clockwise
Switch-off
pressure
setpoint
reached
Switch-off
pressure
setpoint
exceeded
Shut off electrical
power supply and
secure it to prevent
it from being
switched back on
without
authorisation
Shut off electrical
power supply and
secure it to prevent
it from being
switched back on
without
authorisation
Turn switch-off pressure adjusting
screw anticlockwise until a clicking sound
can be heard
Domestic water
system switches
off
Domestic water
system does not
switch off
Shut off electrical power supply
(Routine2)
Checkingandsettinggas pressure of
diaphragm vessel
Depressurise diaphragm container on
the water side:
Open check valve on the pressure
side and open a draw-off point
Note remaining water column and
drain domestic water system
completely if necessary
Pressure gauge of
domestic water
system displays 0 bar
Check container pressure on gas filling
valve and top up or vent gas if necessary

English
Installation and operating instructions Wilo domestic water systems Hxx 29
9Maintenance
WARNING! Danger due to electrical current!
Before conducting the check, de-energise the
domestic water system and secure it to prevent
it from being switched back on inadvertently.
The main components of WILO domestic water
systems are almost maintenance-free. The fol-
lowing checks are recommended at 3-monthly
intervals in order to guarantee the highest operat-
ing reliability with the lowest possible operating
costs:
• Check the diaphragm pressure vessel has the gas
supply pressure set correctly (Fig. 6). To do this,
de-energise the domestic water system and
depressurise the container on the water side.
DANGER! Danger of suffocation by nitrogen!
Measuring, replenishing and venting of nitrogen
at the diaphragm pressure vessel is only allowed
to be performed by qualified specialist person-
nel.
WARNING! Danger of personal injury!
Excessive pressure can cause the container to
rupture and lead to serious injuries! Monitor the
gas supply pressure by measuring during the
filling procedure. When measuring instruments
with different scale divisions (unit of dimension)
are used, it is essential to comply with the
instructions for converting!
Comply with the general safety regulations for
working with pressure vessels.
• The gas supply pressure (PN2) should approxi-
mately correspond to the pump switch-on pres-
sure (pE) less 0.2-0.5 bar or 10% of the pump
switch-on pressure (pE) (see Table 1). Deviations
from the prescribed value shall be corrected by
filling or venting gas. When replenishing, it is rec-
ommended that nitrogen should be used because
this gas minimises the risk of corrosion in the con-
tainer, as well as preventing losses through diffu-
sion.
• Check the pump for leaks.
CAUTION! Risk of damage to the domestic water
system!
If there is a risk of frost, the system must be
completely drained (including the diaphragm
pressure vessel). The drainage screw (Fig. 1,
no. 3) is located on the underside of the pump.
Prior to a long standstill (e.g. overwintering), the
domestic water system must be thoroughly
flushed through, completely drained and then
stored in a dry place.
Before recommissioning the system, check that
the pump shaft can turn freely (e.g. by turning the
fan wheel).
WARNING! Danger due to electrical current!
Before conducting the check, de-energise the
domestic water system and secure it to prevent
it from being switched back on inadvertently.
Following this, take the domestic water system
into operation (see section 8).
10 Faults, causes and remedies
Faults Causes Remedy
Pump not running No mains voltage Check fuses, float switch and cable
Fuse defective Renew fuse
Motor protection tripped Correct motor overload
Pump not running smoothly Eliminate blockages of the pump
Pump blocked Eliminate blockage of the pump
Dry-running protection tripped, water
level too low
Check water level and correct
Pump defective Renew pump
Pump is running but not pumping Incorrect direction of rotation Swap 2 phases of the mains connection
Supply voltage too low Check mains voltage, capacitor and
cables
Line or parts of the pump are blocked by
foreign bodies
Check and clean line and pump
Air in suction port Seal suction line
Air in the pump Fill the pump again
Inlet pipe or suction line too narrow Install an inlet pipe or suction line with a
larger nominal diameter
Immersion depth of the foot valve too
low
Increase immersion depth of the foot
valve
Pump is not pumping smoothly Suction head too large Position pump lower
Pressure is not adequate Incorrect pump selected Install a more powerful pump
Incorrect direction of rotation Swap 2 phases of the mains connection
Flow rate too low, suction line or filter
blocked
Clean filter and suction line
Check valve not opened sufficiently Open the check valve
Foreign matter is blocking the pump Clean pump

English
30 WILO SE 11/2010
11 Spare parts
Spare parts are ordered via local specialist retailers
and/or Wilo customer service. To avoid queries
and incorrect orders, all data on the rating plate
should be submitted for each order.
Pump vibrating Foreign matter in the pump Remove the foreign matter
Pump not running smoothly Check smooth running of the pump/
motor
Cable terminals loose Check cable terminals of the motor and
secure
Pump not adequately secured to the
container
Tighten fastening screws
Bearing surface is not solid enough Stabilise the bearing surface
Motor overheating
Motor protection trips
Inadequate voltage Check voltage
Pump not running smoothly:
Foreign bodies in the pump
Rotors blocked
Bearing damaged
Clean pump
Clean pump
Have the pump repaired by Wilo cus-
tomer service
Ambient temperature too high Improve the cooling and perform a
restart after cooling down.
Geodesic head > 1000 m Pump is only approved for geodesic head
< 1000 m
Motor protection (DM version) is set too
low
Adjust setting of motor protection to
rated motor current
One phase (DM version) is interrupted Check, renew cable if necessary
Motor-protective circuit-breaker defec-
tive
Renew motor-protective circuit-breaker
Motor defective Have the motor replaced by Wilo cus-
tomer service
Pump switches on and off too frequently
when water is drawn off
Gas supply pressure in diaphragm pres-
sure vessel too low
Check gas supply pressure in diaphragm
pressure vessel and correct it
Diaphragm of the diaphragm pressure
vessel defective
Have the diaphragm or diaphragm pres-
sure vessel replaced by Wilo customer
service
Faults Causes Remedy

D EG  Konformitätserklärung
GB EC  Declaration of conformity
F Déclaration de conformité CE
(
g
emäß 2006/42/EG Anhang II,1A und2004/108/EG Anhang IV,2,
according 2006/42/EC annex II,1A and2004/108/EC annex IV,2,
conforme 2006/42/CE appendice II,1A et 2004/108/CE appendice IV,2)
Hiermit erklären wir, dass die Bauart der Baureihe : HMC, HMP, HMHI,
Herewith, we declare that the product type of the series: HWJ
Par le présent, nous déclarons que lagrégat de la série : MPT 250
(Die Seriennummer ist auf dem Typenschild des Produktes angegeben. /
The serial number is marked on the product site plate. /
Le numéro de série est inscrit sur la plaque signalétique du produit.)
in der gelieferten Ausführung folgenden einschlägigen Bestimmungen entspricht:
in its delivered state complies with the following relevant provisions:
est conforme aux dispositions suivantes dont il relève:
EG-Maschinenrichtlinie 2006/42/EG
EC-Machinery directive
Directives CE relatives aux machines
Die Schutzziele der Niederspannungsrichtlinie 2006/95/EG werden gemäß Anhang I, Nr. 1.5.1 der Maschinenrichtlinie 2006/42/EG
eingehalten.
The protection objectives of the low-voltage directive 2006/95/EC are realized according annex I, No. 1.5.1 of the EC-Machinery directive
2006/42/EC.
Les objectifs protection de la directive basse-tension 2006/95/CE sont respectées conformément à appendice I, n
o
1.5.1 de la
directive CE relatives aux machines 2006/42/CE.
Elektromagnetische Verträglichkeit - Richtlinie 2004/108/EG
Electromagnetic compatibility - directive
Compatibilité électromagnétique- directive
Angewendete harmonisierte Normen, insbesondere: EN 809
A
pplied harmonized standards, in particular: EN ISO 14121-1
Normes harmonisées, notamment: EN 60204-1
Bei einer mit uns nicht abgestimmten technischen Änderung der oben genannten Bauarten, verliert diese Erklärung ihre Gültigkeit.
If the above mentioned series are technically modified without our approval, this declaration shall no longer be applicable.
Si les gammes mentionnées ci-dessus sont modifiées sans notre approbation, cette déclaration perdra sa validité.
Bevollmächtigter für die Zusammenstellung der technischen Unterlagen ist:
Authorized representative for the completion of the technical documentation:
Mandataire pour le complément de la documentation technique est :
WILO SE
Quality Department
Anderslebener Str. 161
39387 Oschersleben
Germany
Dortmund, 14.07.2010
Erwin Prieß
Quality Manager
WILO SE
Nortkirchenstraße 100
44263 Dortmund
Germany
Document: 2109736.1

NLI E
EG-verklaringvan overeenstemmingDichiarazionedi conformità CE Declaración de conformidadCE
Hiermedeverklaren wij dat ditaggregaat in degeleverdeuitvoering
voldoet aan devolgendebepalingen:
Con lapresente si dichiarachei presenti prodotti sonoconformi alle
seguenti disposizioni edirettive rilevanti:
Por lapresente declaramos laconformidad del producto en su estadode
suministrocon las disposiciones pertinentes siguientes:
EG-richtlijnen betreffende machines 2006/42/EG Direttiva macchine2006/42/EG Directiva sobre máquinas 2006/42/EG
De veiligheidsdoelstellingen van delaagspanningsrichtlijn worden
overeenkomstigbijlage I, nr. 1.5.1 van demachinerichtlijn 2006/42/EG
aangehouden.
Gli obiettivi di protezionedelladirettiva macchinevengonorispettati
secondoallegato I, n. 1.5.1 dalladirettiva macchine2006/42/CE.
Se cumplen los objetivos en materiadeseguridad establecidos en la
Directiva deBajatensión según loespecificadoen el
AnexoI, punto 1.5.1 delaDirectiva deMáquinas 2006/42/CE.
Elektromagnetischecompatibiliteit 2004/108/EG Compatibilità elettromagnetica 2004/108/EG Directiva sobre compatibilidadelectromagnética 2004/108/EG
gebruikte geharmoniseerdenormen, in het bijzonder: normearmonizzate applicate, in particolare:normas armonizadas adoptadas, especialmente:
zievorige paginavedi paginaprecedente véase páginaanterior
PSN
Declaraçãode Conformidade CE CE- försäkran EU-Overensstemmelseserklæring
Pelapresente, declaramos que esta unidadenoseu estadooriginal, está
conformeos seguintes requisitos:
Härmed förklarar vi att dennamaskin i levererat utförandemotsvarar
följandetillämpliga bestämmelser:
Vi erklærer hermed at denneenheten i utførelse som leverter i
overensstemmelse med følgenderelevante bestemmelser:
Directivas CEE relativas a máquinas 2006/42/EG EGMaskindirektiv 2006/42/EG EGMaskindirektiv 2006/42/EG
Os objectivos deprotecçãodadirectiva debaixatensãosãocumpridos de
acordocom oanexoI, nº 1.5.1 dadirectiva demáquinas 2006/42/CE.
Produkten uppfyller säkerhetsmålen i lågspänningsdirektivet enligt bilaga
I, nr 1.5.1 i maskindirektiv2006/42/EG.
Lavspenningsdirektivets vernemål overholdes i samsvar med
vedlegg I, nr. 1.5.1 i maskindirektivet 2006/42/EF.
Compatibilidade electromagnética 2004/108/EG EGElektromagnetisk kompatibilitet  riktlinje2004/108/EG EGEMVElektromagnetisk kompatibilitet 2004/108/EG
normas harmonizadas aplicadas, especialmente:tillämpadeharmoniseradenormer, i synnerhet:anvendte harmoniserte standarder, særlig:
ver páginaanteriorse föregåendesidaseforrige side
FINDK H
CE-standardinmukaisuusselosteEF-overensstemmelseserklæringEK-megfelelségi nyilatkozat
Ilmoitammetäten, että tämälaite vastaa seuraaviaasiaankuuluvia
määräyksiä:
Vi erklærer hermed, at denneenhed ved leveringoverholder følgende
relevante bestemmelser:
Ezennel kijelentjük, hogy az berendezésmegfelel az alábbi irányelveknek:
EUkonedirektiivit: 2006/42/EG EUmaskindirektiver 2006/42/EG Gépek irányelv: 2006/42/EK
Pienjännitedirektiivin suojatavoitteita noudatetaan
konedirektiivin 2006/42/EY liitteen I, nro1.5.1 mukaisesti.
Lavspændingsdirektivets mål om beskyttelse overholdes i henhold til bilag
I, nr. 1.5.1 i maskindirektivet 2006/42/EF.
Akisfeszültség irányelvvédelmi elírásaita
2006/42/EK gépekrevonatkozó irányelvI. függelékének 1.5.1. sz. pontja
szerintteljesíti.
Sähkömagneettinen soveltuvuus 2004/108/EG Elektromagnetisk kompatibilitet: 2004/108/EG Elektromágneses összeférhetség irányelv: 2004/108/EK
käytetyt yhteensovitetut standardit, erityisesti: anvendte harmoniseredestandarder, særligt:alkalmazott harmonizáltszabványoknak, különösen:
katso edellinen sivu.se forrige sidelásd az elz oldalt
CZ PLRUS
Prohláení oshod ESDeklaracja Zgodnoci WE     
Prohlaujemetímto, etento agregátvdodaném provedení odpovídá
následujícím písluným ustanovením:
Niniejszym deklarujemyz pen odpowiedzialnoci, edostarczonywyrób
jest zgodnyz nastpujcymi dokumentami:
  ,      
    :
SmrniceESpro strojní zaízení 2006/42/ESdyrektyw maszynow WE 2006/42/WE  EC    2006/42/EG
Cíletýkající se bezpenosti stanovené ve smrnici oelektrických zaízeních
nízkéhonaptí jsou dodrenypodlepílohyI, . 1.5.1 smrnice ostrojních
zaízeních 2006/42/ES.
Przestrzeganes celeochronydyrektywyniskonapiciowej zgodniez
zacznikiem I, nr 1.5.1 dyrektywymaszynowej 2006/42/WE.
  ,    
 ,    I,
 1.5.1     2006/42/G.
Smrniceoelektromagnetickékompatibilit 2004/108/ESdyrektyw dot. kompatybilnoci elektromagnetycznej 2004/108/WE  "# 2004/108/EG
pouité harmonizaní normy, zejména:stosowanymi normami zharmonizowanymi, aw szczególnoci:     ,  :
viz pedchozí strana patrz poprzedniastrona.  
GRTRRO
$%&*+; +<>>?@Q*+;X Y;X \\ CE Uygunluk TeyidBelgesi EC-Declara^iede conformitate
         
    :
Bu cihazn teslim edildii ekliyleaadaki standartlarauygun olduunu
teyid ederiz:
Prin prezenta declarm c acest produs aacum este livrat, corespundecu
urmtoareleprevederi aplicabile:
_`;{|}X E~ { >;%>Y 2006/42/E~ AB-Makina Standartlar 2006/42/EG Directiva CE pentru maini 2006/42/EG
       
    I, . 1.5.1     
 2006/42/EG.
Alçak gerilim yönergesinin korumahedefleri, 2006/42/AT makine
yönergesi Ek I, no. 1.5.1'euygundur.
Suntrespectate obiectiveledeproteciedin directiva privind joasa
tensiuneconform Anexei I, Nr. 1.5.1 din directiva privind mainile
2006/42/CE.
&}Y@>{;Y% +<>Y?Y;Y E~-2004/108/E~ Elektromanyetik Uyumluluk 2004/108/EG Compatibilitatea electromagnetic  directiva 2004/108/EG
  , : ksmen kullanlan standartlar için: standardearmonizate aplicate, îndeosebi:
   bkz. bir önceki sayfa vezi paginaprecedent
EST LVLT
EÜ vastavusdeklaratsioon EC - atbilstbas deklarcija EB atitikties deklaracija
Käesolevaga tõendame, et see toodevastab järgmisteleasjakohastele
direktiividele:
Ar omsapliecinm, kaisizstrdjumsatbilst sekojoiem noteikumiem: iuo paymima, kad isgaminys atitinkaias normas ir direktyvas:
Masinadirektiiv 2006/42/EÜ Manu direktva 2006/42/EKMain direktyv 2006/42/EB
Madalpingedirektiivi kaitse-eesmärgid on täidetud vastavaltmasinate
direktiivi 2006/42/EÜ I lisa punktile1.5.1.
Zemspriegumadirektvas drobas mri tiek ievroti atbilstoi Manu
direktvas 2006/42/EK pielikumam I, Nr. 1.5.1.
Laikomasi emos tampos direktyvos keliam saugos reikalavim pagal
Main direktyvos 2006/42/EB I priedo1.5.1 punkt.
Elektromagnetiliseühilduvusedirektiiv 2004/108/EÜ Elektromagntisks savietojambas direktva 2004/108/EKElektromagnetiniosuderinamumo direktyv 2004/108/EB
kohaldatud harmoneeritud standardid, eriti: piemroti harmonizti standarti, tai skait: pritaikytus vieningus standartus, obtent:
vt eelmist lk skattiepriekjolappusi r. ankstesniamepuslapyje
SK SLO BG
ESvyhlásenieozhode ES izjava oskladnosti E-  
Týmto vyhlasujeme, ekontrukcietejto kontruknej sérievdodanom
vyhotovení vyhovujú nasledujúcim prísluným ustanoveniam:
Izjavljamo, dadobavljenevrste izvedbe te serijeustrezajosledeim
zadevnim doloilom:
,      :
Stroje- smernica 2006/42/ESDirektiva ostrojih 2006/42/ES  2006/42/EO
Bezpenostné cielesmernice onízkom napätí sú dodriavané vzmysle
prílohyI, . 1.5.1 smernice ostrojových zariadeniach 2006/42/ES.
Cilji Direktive onizkonapetostni opremi so vskladus
prilogo I, t. 1.5.1 Direktive ostrojih 2006/42/EG doseeni.
        
 .  I,  1.5.1   
 2006/42/E.
Elektromagnetická zhoda - smernica 2004/108/ESDirektiva oelektromagnetni zdruljivosti 2004/108/ESE    2004/108/E
pouívané harmonizované normy, najmä:uporabljeni harmonizirani standardi, predvsem:  :
pozri predchádzajúcu stranuglejte prejnjostran .  
M
Dikjarazzjoni ta konformità KE
B'dan il-mezz, niddikjaraw li l-prodotti tas-serjejissodisfaw id-
dispoizzjonijiet relevanti li ejjin:
Makkinarju - Direttiva 2006/42/KE
L-objettivi tas-sigurta tad-Direttiva dwar il-Vulta Baxx humakonformi
WILO SE
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jg
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mal-Anness I, Nru1.5.1 tad-Direttiva dwar il-Makkinarju2006/42/KE.
Kompatibbiltà elettromanjetika - Direttiva 2004/108/KE
kifukoll standardsarmonizzati b'mod partikolari:
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