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    • The most compact basic size
    • Innovative basic hydro-mechanical principle
    • With fine suction filter
    • Safe operation
    • Saves costs
 
Complete supply engineering for your rain water plant
 
  • Pressures instead of sucking
  • freely of intake problems high supply security
  • Assembly finished
 
 

Optima 
The Compact Rainwater Unit

  • Most compact dimensions
  • Innovative basic hydro-mechanical technique
  • With fine suction filter
  • Safe to operate
  • Cost saving
The WISY Optima Rainwater Unit is the control center of the rainwater utilization system. It combines numerous individual appliances in a matching overall package.
Optima pumps the rainwater out of the cistern and feeds it into the rainwater utilization network.
At the same time Optima controls the whole rainwater utilization system, checks the level in the storage tank and provides potable water feed when required.
 
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   ABB.:tank equipment                                                      

house equipment
 
 

Function

The hydro-mechanical controls combine the “traditional” controls by means of automatic switches with the use of mechanical flow effects. This achieves a great deal of functional safety. The Optima system from WISY basically works with two pressure pumps. 

The loading pump of Optima is fitted in the storage tank as a submersible pump and fitted with a fine floating suction filter and a float switch. The loading pump brings the rainwater to the normal suction rotary pump in the Optima. The admission pressure has the effect that this only has to pump and that the inlet pipe from the potable water feed is closed. 

Normal rainwater units with only one suction pump, long suction paths and large differences in height always lead to problems in operating safety. Not with Optima: if a user valve is opened, both pumps start through the automatic switch. The maximum flow volume of the Optima then lies at about 70 l/min.

Because of the two-pump system, the Optima can also be used in unfavourable conditions (e.g. long suction length or large difference in height between cistern floor and pump location in the rainwater unit). If required the Optima can be flexibly fitted with more powerful pumps and loading pumps. 

Switching over to potable water feed is made automatically. If the cistern is empty, the float switch switches off the loading pump. As there is now no admission pressure, potable water is drawn out of the feed tank of the Optima. The lowering water level in the feed tank causes the floating valve at the outlet of the potable water pipe to open. The valve closes again when the feed tank is full.
But manual switching to potable water feed is easily possible at any time through network discoupling of the loading pump. The feed tank is fitted with an extra emergency overflow. The potable water feed is fitted as an open outlet according to DIN 1988/4. A continuous exchange of water in the feed tank follows automatically. 

The Optima is fitted with a level indicator for the storage tank or cistern. The measuring appliance works on the basis of a pneumatic measuring process. Each pipework pressure that the rainwater unit works with is displayed by a manometer.

Sizes b x h x d (mm): 465 x 500 x 310


General Remark

The rainwater unit is usually assembled above the backpressure level in the basement. If the Optima has to be installed below the backpressure level in the basement, the emergency overflow is only to be connected to the drain through a siphon with a backpressure valve. Our multi-siphon can be used here. 


The Optima standard package contains:

  • A normal suction, multi-stage rotary pump with automatic switch, with a choice of two outputs: 4 bar or 5 bar system pressure

  • Separate submersible pump with fine floating suction filter and attached float switch (loading pump) for the cisterns

  • Level indicator for cisterns with 13 m measuring line

  • Manometer to indicate the pipe pressure

  • Potable water feed to DIN 1988/4

  • 9 litres integrated feed container

  • Emergency overflow DN 70

  • Housing

  • 3 flexible connecting hoses for connecting to the house pipework