Glandless Pumps - THERMO-ECO-ENGINEERING úvod

Planning Guide
High-Efficiency Pumps
Wilo-Stratos ECO/ECO-BMS/ECO-Z/ECO-Z-BMS/ECO-ST
Wilo-Stratos ECO, Stratos ECO-BMS, Stratos ECO-Z,
Stratos ECO-Z-BMS, Stratos ECO-ST
The Wilo-Stratos ECO series with the variants Stratos ECO-BMS,
ECO-Z, ECO-Z-BMS and ECO-ST supplement the previously
described Wilo-Stratos series with the following advantages:
- energy savings of up to 80% compared with standard pumps
- Stratos ECO, ECO-BMS, ECO-Z and ECO-Z-BMS version for all heating
systems in the temperature range +15 °C to +110 °C
- Stratos ECO-ST version for solar thermal systems in the temperature
range +15°C to +110°C
- automatic adjustment of pump performance to continually changing
hydraulic system load conditions
- preventing flow noise
- reliability and comfort during installation and operation
Fields Of application
The Wilo-Stratos ECO, ECO-BMS, ECO-Z, ECO-Z-BMS and ECO-ST
series can be utilised as high-efficiency pumps in circulation systems
for heating and in solar heating systems in 1-6-family houses.
Temperature range
Fluid temperature range of +15 °C to +110 °C at ambient temperatures
of 0 °C to a max. of + 40 °C.
Heating application
On account of its corrosion-resistant red bronze pump housing, the
Wilo-Stratos ECO in its RG version are particularly suitable for systems
subject to the possible ingress of oxygen, e.g. floor heaters with
heating surfaces composed of plastic piping.
Heat insulation with heating applications
In order to prevent thermal losses through the pump housing, Wilo-
Stratos ECO series single-head pumps (except Stratos ECO-ST) are
standard-equipped with thermal insulation shells.The EPP material
used (foamed polypropylene), has the following properties:
- Environmental compatibility: easily recyclable
- Heat resistance: up to 120 °C
- Transmission coefficient: 0.04 W/mK in accordance with DIN 52612
- Flammability: Class B2 in accordance with DIN 4102 (normal flammability)
In Germany, normally flammable materials can, in accordance with
fire protection regulations, be used in boiler rooms as long as a minimum
distance of 20 cm from the burner is maintained.
Utilisation of potable water circulation
(Wilo-Stratos ECO-Z, ECO-Z-BMS)
Pumps used in potable water circulation systems are subject to specific
requirements which are satisfied by the Wilo-Stratos ECO-Z and
ECO-Z-BMS Series:
- The fluids involved are potable water and water for food businesses
in accordance with the TrinkwV 2001 (German Potable Water Ordinance).
The design of the pumps take into account calcification in
such a way as to permit an overall carbonate hardness of 20°d at a
max. fluid temperature of +65 °C.
- All plastic parts that come into contact with the pumped liquid are in
conformance with KTW recommendations.
- The differential-pressure control mode p-v allows automatic
adjustment of pump performance in variable volumetric-flow potable
water circulation systems with thermostatically controlled line
shutoff valves.
Automatic air venting
Air venting from the rotor space is effected automatically by the filter
and flow channel system. As the pumping medium flows into the
rotor space, a filter plug in the shaft and a filter disc in the bearing
plate prevent the ingress of the smallest abrasive particles.
The seal between impeller and bearing plate prevents dirt from accumulating
in the A-bearing gap on the motor side.
Advantage: The automatic venting of the rotor space is accelerated,
thus reducing the times of dry-running and of air venting
noise.
Advantage: Damage to the radial bearing or to the can is avoided
through this filtering-out process.
Motor protection
The standard series integrated protection device reliably protects the
pump, in all settings, against overtemperature, excess current draw
and rotor locking.
Advantage: No external motor protection switch is required.
The instructions for electrical power connections published
by the local power supply companies are to be
taken into account.
If a motor protection switch is present in the electrical
installation in cases of replacements and can not be
bypassed, for example, then it is to be set to the max.
current allowed by the specifications listed on the
nameplate.
Manual operation
Control button
All versions of the Wilo-Stratos ECO series are operated using the
proven red-button technology (1-button operation). The important
basic functions can thus be safely and comfortably set and adjusted.
Control mode p-v
In the p-v control mode, the differential pressure setpoint is raised
linearly above the permissible volume flow range by between ½Hs
and Hs. The differential pressure generated by the pump is regulated
to the respective differential pressure setpoint.
Fig.:
H max
1 /2
H
Hs
Hs
H min
Control mode p-v
Q
Heating, Air-conditioning,
Cooling
Potable water circulation
Solar thermal
Service/Accessories, Systems
Switchgears and Control
Devices Pump Management
Systems
Wilo Catalogue A1 - Circulating pumps in glandless design
29