Installation for the preparation of hot water

Abstract

Disclosed is an installation for the preparation of hot water. The installation includes a cold water reservoir, a heating unit, a cold water pipe between the cold water reservoir and the heating unit, a draw-off point for drawing off hot water, a hot water pipe between the heating unit and the draw-off point and a pump for making water flow from the cold water reservoir through the cold water pipe, the heating unit and the hot water pipe to the draw-off point. A vent pipe is connected to at least one of the said pipes.

1 - 8 . (canceled)  
   
   
       9 . An installation for the preparation of hot water, comprising: 
 a cold water reservoir,    a heating unit,    a cold water pipe between the cold water reservoir and the heating unit,    a draw-off point for drawing off hot water,    a hot water pipe between the heating unit and the draw-off point,    a pump for making water flow from the cold water reservoir through the cold water pipe, the heating unit and the hot water pipe to the draw-off point, and    a vent pipe connected to at least one of the cold water pipe and the hot water pipe.    
   
   
       10 . The installation according to  claim 9 , wherein the pump is installed in the cold water pipe and, viewed in the direction of flow of the water, the vent pipe is connected to the cold water pipe downstream of the pump and upstream of the heating unit.  
   
   
       11 . The installation according to  claim 10 , wherein a further vent pipe is connected to the hot water pipe.  
   
   
       12 . The installation according to  claim 9 , wherein the pump is installed in the hot water pipe and, viewed in the direction of flow of the water, the vent pipe is connected to the hot water pipe downstream of the heating unit and upstream of the pump.  
   
   
       13 . The installation according to  claim 12 , wherein a further vent pipe is connected to the hot water pipe downstream of the pump.  
   
   
       14 . The installation according to  claim 9 , wherein the vent pipe runs upwards to the level above a highest water level in the installation and runs downwards from the level.  
   
   
       15 . The installation according to  claim 14 , wherein a section of the vent pipe running downwards discharges above the cold water reservoir.  
   
   
       16 . The installation according to  claim 9 , wherein the cold water reservoir is connected via a controllable tap to a cold water feed pipe and a water level in the cold water reservoir is measured by a level meter that gives a signal to open the tap when the water level falls below a set level and gives a signal to close the tap when the set level is exceeded.  
   
   
       17 . The installation according to  claim 10 , wherein the vent pipe runs upwards to the level above a highest water level in the installation and runs downwards from the level.  
   
   
       18 . The installation according to  claim 12 , wherein the vent pipe runs upwards to the level above a highest water level in the installation and runs downwards from the level.  
   
   
       19 . The installation according to  claim 17 , wherein a section of the vent pipe running downwards discharges above the cold water reservoir.  
   
   
       20 . The installation according to  claim 18 , wherein a section of the vent pipe running downwards discharges above the cold water reservoir.  
   
   
       21 . The installation according to  claim 10 , wherein the cold water reservoir is connected via a controllable tap to a cold water feed pipe and a water level in the cold water reservoir is measured by a level meter that gives a signal to open the tap when the water level falls below a set level and gives a signal to close the tap when the set level is exceeded.  
   
   
       22 . The installation according to  claim 12 , wherein the cold water reservoir is connected via a controllable tap to a cold water feed pipe and a water level in the cold water reservoir is measured by a level meter that gives a signal to open the tap when the water level falls below a set level and gives a signal to close the tap when the set level is exceeded.