Vaillant Group International GmbH

dubai, United Arab Emirates

• Pump control according to demand
• Anti-block system for the solar circuit pump
• Absorber efficiency: 95%

auroSTEP solar water heater is manufactured in a German plant which is one of the most modern plants in Europe, with exclusive Vaillant components, with maximum quality, robustness and reliability.

Our system is innovative and different compared to competitors products in its function and its manner of installation. It is a well-outlaid drainback system with high efficiency. In the interior of the installation we find a solar liquid (mixture of glycol and water) and air, therefore there is no need for determined hydraulic components as for example expansion vessel, exhaust fan, manometeretc. as there is practically no pressure in the system.

When the central control unit puts the integrated pump in function, it begins to transport the solar liquid from the serpentine of the accumulator through the tubes to the solar panels where it is heated and sent back to the accumulator to heat the stored sanitary water. During standby the solar liquid is stored in the tubes at the bottom of the system, the collector contains nothing but air. Therefore there is no loss of efficiency due to stagnation of the system, different from pressurized solar systems.

auroSTEP plus 1.150/2.250/3.350:

• Solar panels; auroTHERM flat plate collectors VFK 135 D & VFK 135 VD
• Storage;150/250/350 litres (one & two heat exchangers - monovalent/bivalent)
• Control unit
• Safety valve
• Mounting frame for collector

• Solar water heating system with only 3 components: storage unit with integrated solar pump unit and solar control all pre-assembled, flat plate collectors and tubing
• Well defined system combinations for standard installations no detailed calculation required
• Solar system in 3 versions: auroSTEP plus 1.150, auroSTEP plus 2.250 and auroSTEP plus 3.350
• Storage volumes 150, 250 and 350 litres
• Pre-filled drainback system no filling procedure for the solar circuit needed during initial operation
• Quick and easy installation: plug n flow
• High quality for an attractive system price best value for money

• Consolidated kWh solar gain is displayed on the front page and monthly reports are available
• Single Cylinder sensor (SP1) used rather than multiple sensors.
• Time is synchronised between modules

Our newly launched auroFLOW plus Solar Thermal Drainback System combines all of the advantages of the very latest Vaillant solar technologies in an easy to specify and install pre-assembled kit. auroFLOW plus is the result of intensive research and development. Its the most advanced Solar Thermal Drainback system on the market and is designed to offer maximum efficiency, high performance and total reliability.

This easy-to-install system comprises a collector array, high efficiency pump, drainback vessel, heat exchanger and control. Also, auroFLOW plus takes up less space, all components are contained within the module, and the use of standard 15mm and 22mm copper pipe with compression or hard soldered / brazed fittings. auroFLOWs on-demand reheat cycle is unlike traditional solar systems that can go into stagnation, as the solar fluid drains back into the vessel once hot water demands are met.

We have designed and developed auroFLOW plus for properties with higher daily water usage a versatile, quick and easy to install Solar Thermal Drainback system that comes with our market leading stamp of innovation, quality, reliability and support.

auroFLOW differs from pressurised systems by enabling solar fluid to drain from the collectors back into the system when the hot water demand is met . The system design prevents solar liquid from stagnating making it ideal for all applications where hot water is not required during shutdown periods. By their very design, drainback systems are far simpler than pressurised systems. They are lower maintenance, more easily specified and require less time to install.

auroFLOW plus can be used alongside conventional Vaillant hot water heating systems - VPM 15 D for up to 6 collectors, the VPM 30 D for up to 12 collectors or even larger commercial systems requiring more than 12 collectors, up to 4 collector arrays can be used totalling 48 collectors. The VRC 630 conventionally controls Vaillant cascade boilers, however where auroFLOW Plus is added to the system the VRS 620 can be used.

VRS 620 features

• Consolidated kWh solar gain is displayed on the front page and monthly reports are available
• Single Cylinder sensor (SP1) used rather than multiple sensors.
• Time is synchronised between modules
• Date is synchronised between modules

The collector isMCSapproved so it qualifies for appropriategovernment grants and incentive schemes

Vaillant auroFLOW plus solar systems:

• Upscalable to suit larger commercial installations
• Reduce CO2 emissions and dependency on expensive fossil fuels
• Simple to specify, install and maintain
• Supplied in kit form using one single article number
• Can be integrated into most conventional heating systems
• Lower ongoing costs
• Solar fluid for a longer lifespan and increased efficiency
• Reduced solar fluid volume
• No stagnation
• Backed by Vaillant technical support and lengthy guarantees

• Simple solar system of thermosyphon storage technology
• Simple installation and affordable price
• High quality solar collector
• auroSTEP pro Thermosyphon System

  Vaillant's auroSTEP pro solar water heating system contains a storage which is installed on the roof directly above the collector/s. Well crafted collectors, enameled "tank-in-tank" storages and a coated mounting bracket give the system the known Vaillant quality. The storages are available in the capacities of 150, 200 and 300 liters of domestic hot water.

  When the solar earnings are not sufficient to cover the warm water demand, electrical backups of 2 or 3 kW can be added to the slar water heater. You get further warm water comfort without big installation efforts.

  auroSTEP pro at a glance
  • Simple solar system of thermosyphon storage technology
  • Simple installation and affordable price
  • Steal supports for installation on flat or sloping roof, coated with corrosion protection
  • Installation in warmer areas
  • Electrical back-up can be added to the system
  • High quality solar collector