Honeywell EN2H-0221GE51 R0808 ユーザーズマニュアル

SDC / DHC 

Hydraulic Components 

EN2H-0221GE51 R0808 

213 

If the temperature in the solid fuel boiler rises above the set 
maximum temperature limit, the solid-fuel loading pump is forced 
to switch on. The excess heat is then dissipated into the 
preselected circuits (see "Buffer Tank" menu). This forced 
dissipation will be cancelled and the temperature differential 
control enabled when the solid-fuel boiler temperature 
undershoots the maximum limit by more than 10 K.  

 

If the temperature in the solid-fuel boiler rises above the current 
temperature in the buffer tank by at least the set amount, the 
solid-fuel loading pump is switched on and the buffer tank is 
loaded.  

 

The temperature of the solid-fuel boiler is at least 10 K over the 
minimum temperature limit. 

 

The min. set value is 3 K above the switch-off differential. 

 

If the differential between the solid-fuel boiler and buffer tank 
temperatures is less than the set amount, the solid-fuel loading 
pump is switched off and loading is interrupted. The max. set 
value is constantly 3 K below the selected activation difference in 
order to prevent rear discharging of the buffer tank.  

 

The solid-fuel cycle disable serves to prevent frequent switching 
between loading through the solid-fuel boiler and loading through 
a conventional oil/gas heat generator. 

After the solid-fuel loading pump has been switched off, the set 
time must pass before loading of the buffer tank is continued 
through the conventional heat generator. 

 

This is an automatic function of the controller. If the solar loading 
pump was switched off longer than 24 hours, it is operated for 
approx. 20 seconds to prevent blocking via corrosion.  

 

In systems that have both an external hot-water tank and a buffer 
tank, a diverter valve can be used to switch between loading the 
hot-water tank and loading the buffer tank from solar power 
system. This allows economical and effective use of solar power