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Obtains optimum performance from your heating system

AccuWIN

Heat accumulator

825 to 1500 l

Product teaser image of AccuWIN

AccuWIN

Obtains optimum performance from your heating system

Convenient and variable use

  • Different accumulator types and sizes can be connected
  • Can be used in niches because of the forward-pointing connections
  • Tank temperatures can be easily read off the tank
  • Can be combined with fresh water module FRIWA30

Efficient

  • Best thermal insulation due to 100 mm fleece insulation
  • Unique, patented connection between two buffer tanks
  • Covers as standard to reduce radiation

Reliable and safe

  • Long service life thanks to quality steel and powder coating
  • Resistant polystyrene jacket
   
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Fleece insulation

Up to 36 % less heat loss compared with expanded foam insulation. Made of 70 % recycled material and already satisfies future EU requirements.

Connections pulled up and down

Best use of energy is gained by taking out the heating water at its highest temperature (top) and also loading the bottom part not normally used.

Hooked strip

Quick and easy installation and a clean look since the cable duct has several functions.

6/4" connections

Requires little space and can be used in niches because of the forward-pointing connections.

Indicating thermometer

3 indicating thermometers allow the buffer tank temperatures to be easily read off at the top, middle and bottom.

AccuWIN

Well-designed to the smallest detail

Fleece insulation

Up to 36 % less heat loss compared with expanded foam insulation. Made of 70 % recycled material, AccuWIN already satisfies future EU requirements.

Indicating thermometer

3 indicating thermometers allow the buffer tank temperatures to be easily read off at the top, middle and bottom.

6/4" connections

Requires little space and can be used in niches because of the forward-pointing connections.

Hooked strip

Quick, easy installation and a clean look since the cable duct has several functions.

Connections pulled up and down

The best use of energy is gained by taking out the heating water at its highest temperature (top), and also loading the bottom part which is not normally used.

   

AccuWIN

Unique, patented cascading

Small, but highly efficientPerfect heat management and best possible use of energy are the priorities of the new AccuWIN heat accumulator range.

With innovative combination and loading technology, Windhager will be able to utilise stored heat even more efficiently in future. To this end, the buffer tanks are connected both parallel and diagonally. This means the solar yield is significantly greater than in conventional solutions, and above all in buffer cascades with only one solar accumulator.

Method of operation: loading

Step 1: loading

First of all, only the AccuWIN Solar is loaded as a result of the buffer loading control and the hydraulic arrangement.

Advantages for you:

  • Quickly achieves a usable temperature level, because only a small volume of water (approx. 50 – 70 l) needs to be heated.
  • Lower radiation losses, because only the AccuWIN Solar is heated up.
 

Step 2: loading the 2nd accumulator

A valve opens as soon as the temperature in the area of the solar accumulator's connecting pipe reaches 45 °C. The second buffer tank is loaded without any auxiliary energy whatsoever, due to thermal circulation.

Advantages for you:

  • Loading of the second buffer tank (AccuWIN) without additional auxiliary energy
  • The bottom part of the solar accumulator (AccuWIN Solar) remains available for potential solar yield up until the point when it has been fully loaded.
 

Step 3: both accumulators fully loaded

If sufficient energy is supplied (e.g. from a split log boiler) then both accumulators (AccuWIN Solar and AccuWIN) are fully loaded.

 

Method of operation: unloading

Step 1: unloading

During unloading, precedence is given to energy from the solar accumulator.

Advantages for you:

  • Rapidly available area (bottom) in the AccuWIN Solar for possible solar yield.
  • Optimum temperature stratification in both accumulators at all times, because the return goes straight into the AccuWIN Solar via the bottom connection. In contrast to a serial connection, this avoids the second buffer tank having to be passed through.
 

Step 2: reverse unloading

If the temperature in the AccuWIN Solar (left) drops below that of the AccuWIN (right), the heat gradient in the first accumulator is changed around using a pump.

Advantage for you:

  • Optimum temperature stratification is maintained
   

AccuWIN

Technical data

The AccuWIN is available in three different forms. We have provided an overview of the technical data.

Type AccuWIN 825AccuWIN 1000AccuWIN 1500
Nominal contentl8251.0001.500
Diameter with/without insulationmm990/790990/7901.200/1.000
Height with/without insulationmm1.940/1.8602.135/2.0502.235/2.150
Overall height without insulationmm1.9052.0902.270
Minimum room heightmm1.9602.1902.290
Weight with/without insulationkg120/110140/130220/205
Supply and return connectionsInt./ext. thread6/4“ IG6/4“ IG6/4“ IG
Connection portsInt./ext. thread6/4“ IG6/4“ IG6/4“ IG
Max. permissible operating pressure for heatingbar333
ERP label

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