Wilo Wilo-Economy CO-1/T-1 /CE+ /ER Series User manual

DEinbau- und Betriebsanleitung
GB Installation and operating instructions
FNotice de montage et de mise en service
NL Inbouw- en bedieningsvoorschriften
Wilo-Economy CO-1 ..., CO/T-1 ... .../CE+ .../ER
Wilo-Comfort-Vario COR-1 ... ...-GE .../VR
2 527 299-Ed.03/2010-07-Wilo

Fig. 1a Fig. 1b
9
8
3
2
1
10
4
6
5
12
11
15
8
10
9
2
11 15
Fig. 1c Fig. 1d
10
9
11
15
13
8
3
2
1
10
4
6
12
14
11 515

Fig. 1e Fig. 1f
13
8
3
2
111
4
6
5
12
9
10
15
2
3
4
1
5
6
8
10
12
11
15
Fig. 1g
13
8
3
2
111
4
5
10
15
6

Fig. 2a
Fig. 2b

Fig. 3a
20
19
25
24
21
22
20
19
26 27

Fig. 3b
19
28
20
21
19 20
21
22
23
+
-

Fig. 4
Fig. 5

Fig. 6a

Fig. 6b
Fig. 7a
Fig. 7b

Fig. 8

Fig. 9
Fig. 10a

Fig. 10b

English
18 WILO SE 07/2010
1 General ..................................................................................................................................................21
1.1 About this document ...........................................................................................................................................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 ................................................................................21
2.6 Unauthorised modification and manufacture of spare parts ..........................................................................22
2.7 Improper use ........................................................................................................................................................22
3 Transport and interim storage ...........................................................................................................22
4 Intended use .........................................................................................................................................22
5 Product information ............................................................................................................................23
5.1 Type key ................................................................................................................................................................23
6 Description of the product and accessories .....................................................................................23
6.1 General description .............................................................................................................................................23
6.2 Components of the system ................................................................................................................................24
6.3 Function of the system .......................................................................................................................................25
6.4 Noise .....................................................................................................................................................................25
6.5 Scope of delivery .................................................................................................................................................26
6.6 Accessories ...........................................................................................................................................................26
7 Installation ...........................................................................................................................................26
7.1 Installation site ....................................................................................................................................................26
7.2 Installation ............................................................................................................................................................26
7.3 Electrical connection ...........................................................................................................................................30
8 Commissioning/Decommissioning .....................................................................................................30
8.1 General preparations and checking ...................................................................................................................30
8.2 Protection against low water level (WMS) ........................................................................................................32
8.3 Commissioning the system .................................................................................................................................32
8.4 Decommissioning the system ............................................................................................................................32
9 Maintenance .........................................................................................................................................33
10 Faults, causes and remedies ...............................................................................................................33
11 Spare parts ...........................................................................................................................................33

English
Installation and operating instructions Wilo-Economy CO-1, CO/T-1;-Comfort-Vario COR-1 19
Installation and operating instructions Wilo Pressure boosting system s (DEA)
Captions:
Fig. 1a Example CO-1HELIX V…../CE+
Fig. 1b Example CO-1MVI…../ER
Fig. 1c Example CO/T-1MVI.../ER
Fig. 1d Example COR-1HELIX VE….. -GE
Fig. 1e Example COR-1HELIX VE…../VR
Fig. 1f Example COR-1MHIE…-GE
Fig. 1g Example COR-1MVISE…-GE
1 Base frame
2Pump
3 Motor
4 Diaphragm pressure vessel
5 Pressure switch/pressure sensor
6 Throughflow fitting
7 Break tank (CO/T only)
8 Inlet connection
9 Control device
10 Non-return valve
11 Stop valve
12 Low-water cut-out switchgear (WMS), optional
13 Frequency converter
14 Main switch (HS), optional (COR-1...GE only)
15 Pressure gauge
Fig. 2a Pressure sensor and diaphragm pressure tank
assembly
4 Diaphragm pressure vessel
5Pressuresensor
6 Throughflow fitting
15 Pressure gauge
16 Electrical connection, pressure sensor
17 Drainage/venting
18 Stop valve
Fig. 2b Pressure sensor and diaphragm pressure tank
assembly
4 Diaphragm pressure vessel
5Pressuresensor
6 Throughflow fitting
15 Pressure gauge
17 Drainage/venting
18 Stop valve
Fig. 3a Pressure switch, type FF (two-way switch)
19 Adjusting screw for deactivation pressure
(upper switching point)
20 Adjusting screw for differential pressure
(lower switching point)
21 Earth connection (PE)
22 Terminal block/contacts
24 Scale for deactivation pressure
25 Scale for differential pressure
26 Connection as normally closed contact (i.e. the
contact opens when pressure rises)
27 Connection as normally open contact (i.e. the
contact closes when pressure rises)
Fig. 3b Pressure switch, type CS (normally closed
contact)
19 Adjusting screw for deactivation pressure
(upper switching point)
20 Adjusting screw for differential pressure
(lower switching point)
21 Earth connection (PE)
22 Terminal block/contacts
23 Connection diagram (the contact opens when
pressure rises)
28 Hand switch 0/Automatic
Fig. 4 Throughflow fitting operation/pressure testing
the diaphragm pressure vessel
A Open/close
B Drain
C Check supply pressure
Fig. 5 Information table: nitrogen pressure, diaphragm
pressure vessel (example)
a Nitrogen pressure according to the table
b Start-up pressure, base-load pump, in bar PE
c Nitrogen pressure in bar PN2
d Nitrogen measurement without water
e Attention: Introduce nitrogen only
Fig. 6a Low-water cut-out switchgear assembly (WMS)
Fig. 6b Electric connection options/
switching logic WMS
12-a WMS assembly
12-1 Pressure switch PS3
12-2 Plug PS3-Nxx or PS3-4xx
12-3 Pressure gauge
12-4 Distributor
12-5 Bleed valve
12-6 Stop valve
12-b WMS connection kit for CO-1
12-7 Screwed connection
12-8 Fitting
12-9 Drainage screw MVI
12-10 O-ring seals
PS3-
4xx
Two-core connecting cable, normally closed
function (opens when pressure drops)
PS3-
Nxx
Three-core connecting cable, two-way-switch
function
BN Brown
BU Blue
BK Black
Connection in control device (see attached termi-
nal diagram)

English
20 WILO SE 07/2010
Fig. 7a Example of a direct connection
(hydraulic diagram)
Fig. 7b Example of an indirect connection
(hydraulic diagram)
29 System CO-1....
30 Consumer connections upstream of the system
31 Diaphragm pressure vessel (accessory) on the
inlet side with bypass
32 Diaphragm pressure vessel (accessory) on the
pressure side with bypass
33 Consumer connections downstream of the system
34 Infeed connection for flushing the system
35 Drainage connection for flushing the system
36 Non-pressurised break tank (accessory) on the
inlet side
37 Flushing apparatus for the inlet connection of the
break tank
38 Bypass for inspection/maintenance (not perma-
nently installed)
Fig. 8 Installation example
A Expansion joint with extension limiters (accessory)
B Flexible connection line (accessory)
C Floor fixing, with structure-borne noise insulation
(by the customer)
D Fixation of pipes, e.g. with pipe clips (by the cus-
tomer)
E Screw the vibration dampers (included in delivery)
into the threaded inserts provided and secure with
counter nuts
BW Bend angle for flexible connection line
RB Bend radius for flexible connection line
Fig. 9 Low-water signal transmitter (float switch) CO/T
A Tank full, contact closed
B Tank empty, contact open
BN = Brown
BU = Blue
BK = Black
TLS Contacts in the control device for low-water sig-
nal transmitter
Fig.
10a
Break tank and float valve CO/T
a Tension ring for cover latch
b Inspection opening with cover
c Float valve (filling valve)
d Fitting to secure float valve during transport
e Maximum water level
f Minimum water level
g Stop valve with screwed connection (by the cus-
tomer)
h Fixation of pipes, e.g. with pipe clips (by the cus-
tomer)
i Draw-off connection for pump
k Overflow connection
l Drainage
m Ventilation and exhaust
n Float of the filling valve
Fig.
10b
Float valve
A Structure
a Valve seat
bScrew
cSeal
d Valve body
eHousing
f Spring
g Threaded ring
h Plug
iPin
j Support nut
k Sealing disc, outer
l Sealing disc, inner
mScrew
n Lever arm
o Lever rod
B Float valve curve CO/T (11/4)
m³/h Volume flow rate
bar Inlet pressure

English
Installation and operating instructions Wilo-Economy CO-1, CO/T-1;-Comfort-Vario COR-1 21
Installation and operating instructions
1 General
Only properly trained staff should carry out the
installation and commissioning!
1.1 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 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 cor-
respond 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 followingmain
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 (serious) injury to persons is proba-
ble if this information is disregarded.
CAUTION!
There is a risk of damage to the product/unit.
'Caution' implies that damage to the product is
likely if this information is disregarded.
NOTE: Useful information on handling the prod-
uct. It draws attention to possible problems.
2.2 Personnel qualifications
The installation, maintenance and repair person-
nel must have the necessary 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
product/unit. Non-observance of the safety
instructions can result in the loss of any claims to
damages.
In detail, non-observance can, for example, result
in the following risks:
• 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 device is not intended to be operated by per-
sons (including children) with impaired physical,
sensory or mental capacities or lack of experience
and/or lack of knowledge, except in cases where
they are supervised by a person responsible for
their safety or where they receive instruction from
such a person as to how the device is to be opera-
ted.
Children must be kept under supervision in order
to ensure that they do not play with the device.
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 should only be carried
out when it has been brought to a standstill. It is
mandatory that the procedure described in the
installation and operating instructions for shut-
ting down the product/unit be complied with.

English
22 WILO SE 07/2010
2.6 Unauthorised modification and manufacture of
spare parts
Modifications to the product are only permissible
after consultation with the manufacturer. 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
The system is supplied on a pallet, on transport
boards or in a crate and is film-wrapped to protect
it against moisture and dust. Transport and stor-
age instructions marked on the packing must be
observed.
CAUTION! Risk of damage!
The equipment must be transported by means of
authorised load carriers. Stability of the load
must be ensured, since with this particular range
of pumps, the centre of gravity has been shifted
to the top (top-heavy). Transport straps or
ropes must be secured to the existing transport
lugs or taken round the base frame. The pipes
and fittings will not withstand loads and should
not be used to secure loads in transit.
CAUTION!
Loading of the pipes in transit can result in leaks!
The transport dimensions, weights and necessary
passageways and transport areas at the installa-
tion are given in the attached installation plan or
other documentation.
CAUTION!
The system must be protected against moisture,
frost and heat and also mechanical damage by
means of suitable measures!
If, when unpacking the system and the accompa-
nying accessories, packaging damage is found
which could have been caused by a fall or the like,
check the system and/or the accessory compo-
nents for possible deficiencies.
You may wish to inform the delivery company(the
carrier) or Wilo factory after-sales service, even if
no product damage has yet been found.
After removing the packing, the installation must
be stored or installed according to the installation
conditions described (see section entitled Instal-
lation).
4 Intended use
Automatic single-pump pressure boosting sys-
tems, referred to simply as “the system” in the fol-
lowing, are used in commercial and residential
fields where pressures higher than the usual net-
work pressure are required and a standby pump is
not necessary; for example, for:
• Domestic water supply and cooling systems
• Industrial water supply and cooling systems
• Fire extinguishing water supply installations
• Irrigation and sprinkling installations
• The following standards and directives (or their
local equivalents) should be applied during plan-
ning and installation:
• DIN 1988
• DIN 2000
• EU Directive 98/83/EC
• Trinkwasserverordnung (Drinking water regula-
tions) TrinkwV 2001
• DVGW regulations
Make sure that the fluid to be pumped in the sys-
tem will not attack the materials used in the sys-
tem either chemically or mechanically and that it
does not contain any abrasive or long-fibre con-
stituents.
System types CO-1.. (Fig. 1a and Fig. 1b) or
COR-1.. (Fig. 1d to Fig. 1f) can be connected to
the public water mains either directly or indirectly,
through a break tank from the Wilo range or a
break tank provided independently by the cus-
tomer.
The system type CO/T... (Fig. 1c) is supplied with
an integrated break tank and is therefore already
prepared for indirect connection to the public
water supply network.

English
Installation and operating instructions Wilo-Economy CO-1, CO/T-1;-Comfort-Vario COR-1 23
5 Product information
5.1 Type key
6 Description of the product and accessories
6.1 General description
The system with its non-self-priming, vertically
(MV... or Helix V...) or horizontally (MH...) mounted
high-pressure multistage centrifugal pump is
supplied with all pipework installed as a compact
unit ready for connection. The only connections
that have to be made are for the inlet andpressure
pipes and the power mains connection. Systems
from series CO-1 (Fig. 1a and 1b) and COR-1
(Fig. 1d to 1f) are mounted on a steel base frame
with vibration absorbers. Systems from series
CO/T (Fig. 1e) are mounted on a plastic baseplate
together with a plastic break tank.
It may also be necessary to install accessories
ordered and supplied separately.
The systems CO-1 and COR-1 can be connected
to the water supply network either directly (dia-
gram in Fig. 7a) or indirectly (diagram in Fig. 7b).
When supplied with a self-priming pump (special
version), the system mayonly be connected to the
public water supply network indirectly (system
separation with a non-pressurised break tank).
You will find notes on the pump type used in the
attached installation and operating instructions
for the pump. The systems of type CO/T are pre-
pared for indirect connection to the public water
supply network by the integrated break tank with
level-dependent replenishment and system sepa-
ration.
e.g.: CO-1 Helix V22 08/CE+
CO COmpact pressure boosting system
1 With one pump
Helix V Pump series reference (seeattached pump
documentation)
22 Nominal volume flow Q
[m3/h]
08 Number of pump stages
CE+ Control device, in this case Controller
Economy +
e.g.: CO/T-1 MVI 2 04/ER
CO COmpact pressure boosting system
/T With integrated break tank for system
separation
1 With one pump
MVI Pump series reference (seeattached pump
documentation)
2 Nominal volume flow Q
[m3/h]
04 Number of pump stages
ER Control device, in this case the Economy
Regler (controller)
e.g.: COR -1 Helix VE22 03 -GE
CO COmpact pressure boosting system
R Control by frequency converter
1 With one pump
Helix VE Pump series reference (seeattached pump
documentation)
22 Nominal volume flow Q
[m3/h]
03 Number of pump stages
GE GrundEinheit (basic unit); in other words,
without an additional control device
Controlled by the pump's integrated fre-
quency converter
e.g.: COR-1Helix VE5203/3/VR
CO COmpact pressure boosting system
R Control by frequency converter
1 With one pump
Helix VE Pump series reference (seeattached pump
documentation)
52 Nominal volume flow Q
[m3/h]
03 Number of pump stages
/3 Number of reduced stages
VR Control device, in this case the Vario
Regler (controller)
e.g.: COR-1MHIE 406-2G-GE
CO COmpact pressure boosting system
R Control by frequency converter
1 With one pump
MHIE Pump series reference (see attached pump
documentation)
4 Nominal volume flow Q
[m3/h]
03 Number of pump stages
2G Generation specification
GE GrundEinheit (basic unit); in other words,
without an additional control device
Controlled by the pump's integrated fre-
quency converter

English
24 WILO SE 07/2010
Observe the relevant, applicable regulations and
standards for using the potable water supply and/
or fire extinguishing supply. The installations
must be operated and maintained in accordance
with the relevant instructions (in Germany,
according to DIN 1988 (DVGW) so that the secu-
rity of the water supply is permanently guaran-
teed and neither the public water support nor
other consumption installations are detrimen-
tally affected. The relevant standards or direc-
tives (see Section 4 “Intended use” on page 22) on
connection and the type of connection to the
public water mains must be observed; and supple-
mented by regulations of water companies or
the responsible fire protection authorities, as
required. In addition, local conditions (e.g. a supply
pressure that is too high or fluctuates sharply and
which might require the installation of a pressure
relief valve) must also be observed.
6.2 Components of the system
The system is comprised of several main compo-
nents, which are described in the following. The
scope of delivery includes separate installation
and operating instructions for the operating parts/
components. (Also see attached installation plan.)
Mechanical and hydraulic system components:
Series CO-1 and COR-1 (Fig. 1a, 1b, 1d, 1e, 1f)
The system is mounted on a base frame with
vibration absorbers (1). It comprises a high-pres-
sure multistage centrifugal pump (2) with a
three-phase AC motor (3), with a stop valve (11)
and a non-return valve (10) on the pressure side.
There is also a unit that can be shut off containing
a pressure sensor or pressure switch (5)
(depending on the type of control device) and a
pressure gauge (15), and an 8 litre diaphragm
pressure vessel (4) with a throughflow fitting (6)
that can be shut off (for throughput according to
DIN 4807, part 5). As an option, a low-water cut-
out switchgear (WMS) (12) can be mounted or
retrofitted on the pump's drainage port or on the
inlet pipe. The control device (9) is mounted on
the base frame by means of an upright support
bracket and ready-wired to the electrical compo-
nents of the system.
Series CO/T-1 (Fig. 1c)
The system is mounted on a plastic baseplate (1)
belonging to the integrated break tank (7). It
comprises a high-pressure multistage centrifu-
gal pump (2) with a three-phase AC motor (3),
with a stop valve (11) and a non-return valve
(10) on the pressure side. There is also a unit that
can be shut off containing a pressure sensor or
pressure switch (5) (depending on the type of
control device) and a pressure gauge (15), and an
8l
itre diaphragm pressure vessel (4) with a
throughflow fitting (6) that can be shut off (for
throughput according to DIN 4807, part 5). Afloat
switch (Fig. 9) is installed in the break tank as a
signal transmitter for protection against low water
level. Water from the supply mains is fed into the
break tank via a level-dependent opening and
closing float valve (Fig. 10a and 10b).
The control device (9) is mounted on the tank by
means of a mounting plate and is ready-wired to
the electrical components of the system.
These installation and operating instructions
describe the overall system in general only, with-
out going into a detailed description of the opera-
tion of the control device (see section 7.3 and the
accompanying documentation for the control
device).
High-pressure multistage centrifugal pump (2)
with three-phase AC motor (3) :
Different types of multi-stage high pressure cen-
trifugal pumps are installed in the system depend-
ing on the application and the performance
parameters required. For information about the
pump, see the attached installation and operating
instructions for the pump.
Control device (9):
Different switching and control devices of differ-
ent types with different ranges of features can be
supplied and installed to activate and control the
system. For information on the control device
installed in this system, see the attached installa-
tion and operating instructions for the control
device.
Systems of series COR-1...GE do not have a sepa-
rate control device. The system is controlled by
the pump's integrated frequency converter
module. For operation and handling, see the
installation and operating instructions for the
pump.
Pressure sensor/diaphragm pressure vessel
assembly (Fig. 2a):
Included in systems of types CO-1.../CE+,
CO/T-1.../CE+, COR-1.../GE and COR-1.../VR
• Diaphragm pressure vessel (4) with throughflow
fitting (6)
• Pressure gauge (15)
• Pressure sensor (5)
• Electrical connection for pressure sensor (16)
• Draining/venting (17)
• Stop valve (18)
Pressure sensor/diaphragm pressure vessel
assembly (Fig. 2b and Fig. 3a or Fig. 3b):
Included in systems of types CO-1.../ER,
CO/T-1.../ER
• Diaphragm pressure vessel (4) with throughflow
fitting (6)
• Pressure gauge (15)
• Pressure switch (5) type FF (Fig. 3a) or type CS
(Fig. 3b)
• Electrical connection for pressure switch FF
(Fig. 3a) or pressure switch CS (Fig. 3b)
• Draining/venting (17)
• Stop valve (18)

English
Installation and operating instructions Wilo-Economy CO-1, CO/T-1;-Comfort-Vario COR-1 25
6.3 Function of the system
Wilo single-pump pressure boosting systems are
fitted as standard with a non-self-priming high-
pressure multistage centrifugal pump with a
three-phase AC motor. This pump is supplied with
water via the inlet connection (8). If a self-priming
pump is used, or generally in the case of suction
mode from lower-lying tanks, a separate, vac-
uum-proof and pressure-proof suction line with a
foot valve has to be installed. It should be posi-
tioned at a constant incline from the tank to the
pump connection port. The pump increases the
pressure and pumps the water to the consumer via
the pressure pipe. To do this, it is switched on and
off or controlled depending on the pressure. The
pressure is monitored either by a pressure sensor
(Fig. 2a) or a mechanical pressure switch (Fig. 2b)
depending on the type of control device.
•Pressure switch for system series CO-1 and
CO/T-1 with ER:
The mechanical pressure switch is used to monitor
the pressure present on the consumer side of the
pump. As water consumption increases, the pres-
sure in the consumer line drops. When the mini-
mum switch-on pressure set on the pressure
switch is reached, a switching signal is sent to the
control device, which switches the pump on
immediately. Conversely, when consumption falls
(closing of taps) the pressure in the system rises.
When the deactivation pressure set on the pres-
sure switch is reached, a switching signal is again
sent to the control device and the pump is
switched off. For a more precise description of the
type of control and the control process, see the
installation and operating instructions for the
control device.
•Pressure sensor for system series CO-1 and CO/
T-1 with CE+ or COR-1..-GE and COR-1.../VR:
The pressure sensor continuously measures the
actual pressure value, converts it into an analogue
current signal and transmits it to the control
device. Depending on demand and the type of
control system, the control device switches the
pump on or off or changes the speed of the pump
until the set control parameters are reached. For a
more precise description of the type of control,
the control process and the setting options, see
the installation and operating instructions for the
control device.
The diaphragm pressure vessel installed (4) (total
content approx. 8 litres) performs a certain buffer
function on the pressure sensor and prevents
oscillation of the control system when switching
the system on and off. However, it also allows the
extraction of small amounts of water (e.g. due to
very small leaks) from the available storage vol-
ume without switching on the pump. This reduces
the switching frequency of the pumps and stabi-
lises the operating state of the system.
CAUTION!
To protect the mechanical shaft seal or slide
bearing, the pump must not run dry. Otherwise
the pump may leak.
An assembly for protection against low water level
(WMS) (12) (for detailed drawings see Fig. 6a and
6b) is provided as an accessory for direct connec-
tion to the public water mains. It monitors the
available supply pressure and sends a switching
signal which is processed by the control device.
The WMS assembly is installed on the pump's
drainage opening (this also requires the WMS con-
nection kit (Fig. 6a, 12b) for CO-1 from the Wilo
accessories range) or at an installation point which
must be provided in the inlet pipe.
In the case of an indirect connection (system sep-
aration through non-pressurised break tank), a
level-dependent signal transmitter must be pro-
vided and installed in the break tank as a dry-run-
ning protection device. With systems of series
CO/T or if a Wilo break tank is used, a float switch
(Fig. 9) is already included in the supplied system.
For existing onsite tanks, you will find various sig-
nal transmitters in the Wilo range that can be ret-
rofitted (e.g. float switch WA65 or low-water
warning electrodes with level relay SK 277).
WARNING!
Materials that do not adversely affect the qual-
ity of the water must be used for drinking water
systems!
6.4 Noise
Depending on power requirements, the system
may be delivered with a wide variety of pumps
which can vary just as widely in their noise and
vibration characteristics. You will find the relevant
data in the installation and operating instructions
for the pump or inthe catalogue specifications for
the pump.