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

Hydraulic Components 

SDC / DHC  

196 EN2H-0221GE51 

R0808 

The solar function makes it possible to combine solar power 
systems with heating and hot-water production systems in order 
to support the economy of the system. The solar loading pump 
can be controlled according to various switching conditions. 

 

This function can only be called up, if a configurable switching 
output was occupied with a solar loading pump. 

Two separate sensor inputs are available for the connection of the 
sensors: 

•  KVLF for the solar collector sensor 

•  KSPF for the collector tank sensor 

 

For heat metering, an optional collector return sensor (KRLF) can 
be connected via a variable input (VI1 - VI3). 

The solar loading pump is disabled if the collector flow sensor is 
defective. 

 

(switching differential ON)  
With sufficient solar heat energy, the temperature differential 
between collector flow and tank will become bigger than the set 
value and the solar loading pump is switched on to load the buffer 
tank. The minimum set value is 3 K above the switch-off 
differential. 

 

(switching differential OFF)  

If the temperature differential between the collector flow and tank 
falls below or equal to the set value, the solar loading pump is 
switched off and loading terminated. The maximum set value is 
always 3 K below the selected switch-on differential. 

 

The activated solar loading pump remains in operation for this set 
time. The minimum runtime has priority over the switch-off 
differential (switching differential OFF).  

 

This limit is used for thermal protection of the collector and causes 
forced switch-on of the solar loading pump if the set value is 
exceeded. If the temperature drops below the set value –5 K, all 
solar functions become active again based on their settings.