Lowara Ecocirc® Vario (EV) - Xylem - Applied Water Systems

Lowara Ecocirc ® Vario (EV) design
The Lowara spherical motor design
E-coated cast iron housing
The heating circulator Ecocirc ® Vario uses the spherical
motor principle. The only moving part is
a ball shaped rotor/impeller unit which rides on an
ultra hard ceramic bearing ball. Shaft seals or a conventional
bearing bushings with a shaft have been
eliminated. The only self realigning bearing in the
small pump market has many advantages.
Long term quiet operation
An increase in noise level caused by increasing
bearing play can not happen with this design. Therefore
the pump can be operated for many years up to
the end of the built-in wear path and the noise level
will stay constantly quiet throughout this time.
●
●
Rotor impeller unit
Ceramic bearing ball
Reliable and blockage free
●
●
Screw ring
Lowara
Stator/pump
motor with
ECM technology
Flow rate dependent
differential pressure
control with LED
indicator
The touching surface of the bearing on the ball is
very small. The torque required for starting the pump
is minimal. Laing heating circulators start reliably
even after the seasonal shutdown without the need
for service. The spherical motor principle does not
require a manual unblocking device.
The heating circulator Ecocirc ® Vario combines the
Lowara spherical motor principle with the advantages
of the energy efficient electronic commutation.
●
Thermal
barrier
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●

Lowara Ecocirc ® Vario (EV)
Lowara
The speed of the pump can be manually
regulated to meet the requirement of the
system. The software enables a choice from
infinite number of performance curves.
● Spherical Rotor/Stator
(only one moving part)
● Energy saving
● Blockage free
● Directly interchangeable with other
manufactures units
●
Permanent Magnet EC (Electronically
Commutated) type motor

Lowara Ecocirc ® Vario (EV) pump
Save twice. Profit twice.
Approximately 10 to 15 percent of the electricity
consumption of an average household is caused by
heating circulators. The overwhelming majority of
these consists of single speed standard circulators.
More efficient circulators therefore can contribute
significantly to energy savings efforts.
With extremely low energy consumption the Ecocirc ®
Vario sets a new standard. The heating circulator
Ecocirc ® Vario is a pump without automatic adaptation,
but with efficient electronically commutated permanent
magnet technology.
This means high efficiency for the price of a standard
circulator.
The low initial cost of a standard circulator and the
low consumption result in double savings: Economic
operation and reasonable price. Efficiency at a low
price. Save twice. Profit twice. With the reliability
of the spherical motor.
Technical Data
Motor design Electronically commutated
shaftless spherical motor with
permanent magnet technology
Max. system pressure 6 bar
Voltage 200 – 240 Volt, 50 / 60 Hertz
Power consumption series E4: 9 – 35 Watt
series E6: 9 – 63 Watt
Acceptable media water
water/glycol mixtures*
Temperature range -10 °C** to +95° C
Protection IP 44
Insulation Class F
* Please check pump performance with more than 20 % glycol.
** Non-freezing, non condensing.
Model Designation
Model Connection
EV 25 - 4 / 130
Head
Pump housing
length (in mm)
Fields of application
Hydronic heating systems, heat pumps, air conditioners,
solar thermal systems, cooling loops in closed systems
and industrial applications.
Improved efficiency due to electronic
commutation (ECM)
Electronic commutation results in significant energy
savings with the same performance. The basis for the
higher efficiency is the permanent magnet rotor. The
magnetic field required in the rotor does not have to
be created while incurring losses, but it is permanently
there.
A microprocessor installed in the pump creates a
rotating magnetic field with variable frequency in the
stator coils (electronic commutation), which turns the
rotor. Compared to state of the art pumps even
higher rpm are possible, resulting in higher performance
in a smaller package. Thestarting torque, too, is
significantly increased.
An additional advantage of the electronically commutated
spherical motor pump is that both the coils and
the electronics transfer the majority of their heat into
the water instead of venting it off as waste heat.

A further reduction in heat losses can be achieved by
using the optional insulating cover for the pump
housing. It is made of EPP, heat resistant up to
120°C, easily recycled and therefore environmentally
sound.
Compared to standard circulators, electronically
commutated pumps save energy at full load, but
especially when running at reduced rpm.
Stepless speed control
All Ecocirc ® Vario heating circulators can be speed
Lowara Ecocirc ® Vario (4m head) pump housing length 130 and 180 mm
Lowara Ecocirc ® Vario accessories, components and spare parts
Model
Union fittings
Kit dia 1/2 - 1''
Kit dia 3/4 - 11/4''
Kit dia 1 - 11/2''
Kit dia 11/4 - 2''
Replacement rotors
R-4
R-6
Others
WD-A
PS-A
Model
Part
number
Part
number
105890340
105890350
105890200
105890200
Energy
class
Housing
length
Description
2 pieces union fittings 1 1/4'' female x 3/4'' female
2 pieces union fittings 1 1/4'' female x 3/4'' female
2 pieces union fittings 1 1/2'' female x 1'' female
2 pieces union fittings 2'' female x 1/4'' female
Rotor for series E4vario, incl. gasket
Rotor for series E6vario, incl. gasket
controlled over a very wide range to adjust them to
the requirements of the system. Compared to
standard circulators, ECM pumps save energy at full
load but especially when running at reduced rpm.
At lower setting they are ideally suited for modern
heating systems in which only a fraction of the
circulating power of today’s pumps is required.
Setting the appropriate performance is facilitated by
7 reference points on the dial of the speed adjuster
knob.
The green LED in the transparent knob gives information
about the operational status of the pump.
Connection
Union
fittings
Heat insulation capsule (EPP) for E4/E6 cast iron pump housing
Pump combination wrench for E4/E6 pumps
Housing
material
EV 15-4/130 605000000 A 130 mm G 1'' 1/2'' Cast iron 1.1
EV 20-4/130 605000050 A 130 mm G 1 1/4'' 3/4'' Cast iron 1.2
EV 25-4/130 605000100 A 130 mm G 1 1/2'' 1'' Cast iron 1.3
EV 25-4/180 605000150 A 180 mm G 1 1/2'' 1'' Cast iron 1.6
EV 32-4/180 605000200 A 180 mm G 2'' 1 1/4'' Cast iron 1.6
UK standard version
Lowara Ecocirc ® Vario (6m head) pump housing length 130 and 180 mm
Model
Part
number
Energy
class
Housing
length
Connection
Union
fittings
Housing
material
EV 15-6/130 605000250 B 130 mm G 1'' 1/2'' Cast iron 1.1
EV 20-6/130 605000300 B 130 mm G 1 1/4'' 3/4'' Cast iron 1.2
EV 25-6/130 605000350 B 130 mm G 1 1/2'' 1'' Cast iron 1.3
EV 25-6/180 605000400 B 180 mm G 1 1/2'' 1'' Cast iron 1.6
EV 32-6/180 605000450 B 180 mm G 2'' 1 1/4'' Cast iron 1.6
UK standard version
Weight
kg
Weight
kg

Dimensional drawings Lowara Ecocirc ® Vario (EV)
Dimensional drawings in mm.
EV 25- /130
UK standard version
EV 25- /180 EV 32- /180
Pump curves Lowara Ecocirc ® Vario (EV)
Pump head (kPa) (10kPa = 1m)
60
50
40
30
20
10
0
EV 15- /130 EV 20- /130
Lowara
Flow rate (m 3 /h)

Lowara Replacement Guide
GRUNDFOS
ITT RESIDENTIAL AND COMMERCIAL WATER DIVISION - EMEA
Lowara UK Limited
Millwey Rise Industrial Estate
Axminster, Devon EX13 5HU UK
Tel: 01297 630230
Fax: 01297 630270
e-mail: lowaraukenquiries@itt.com
http://www.lowara.co.uk
For additional addresses, please
visit www.lowara.co.uk
Lowara reserve the right to make
modifications without prior notice.
LOWARA
Ecocirc Auto (EA)
Supplied by
LOWARA
Ecocirc Vario (EV)
Lowara
LOWARA
3 Speed (TLC)
Grundfos UPS 15/50 EA 25-4/130 EV 25-4/130 TLC 25-5/130
Grundfos UPS 15/60 EA 25-6/130 EV 25-6/130 TLC 25-6/130
Alpha + 15/50 EA 25-4/130
Alpha + 15/60 EA 25-6/130
Alpha 2 15/50 EA 25-4/130
Alpha 2 15/60 EA 25-6/130
Alpha 2L 15/50 EA 25-4/130
Alpha 2L 15/60
WILO
EA 25-6/130
Wilo Gold 50 EA 25-4/130 EV 25-4/130 TLC 25-5/130
Wilo Gold 60 EA 25-6/130 EV 25-6/130 TLC 25-6/130
Wilo Smart 25/4 EA 25-4/130 EV 25-4/130
Wilo Smart 25/6 EA 25-6/130 EV 25-6/130
Stratos Pico 25/1-4 EA 25-4/130
Stratos Pico 25/1-6
DAB
EA 25-6/130
VA 35/130 EA 25-4/130 EV 25-4/130 TLC 25-5/130
VA 55/130 EA 25-6/130 EV 25-6/130 TLC 25-6/130
VEA 35/130 EA 25-4/130
VEA 55/130
CPL/MYSON
EA 25-6/130
CP53 EA 25-4/130 EV 25-4/130 TLC 25-5/130
CP63 EA 25-6/130 EV 25-6/130 TLC 25-6/130
cod. UKLIT0042 P 10/10