Hydraulic Components

SDC / DHC

 

 

7.3.6.3Solid fuel function

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

The following sensors can be used for control:

•SFS for the solid fuel boiler sensor

The connection occurs automatically depending on the assignment of the output to VI1 or VI2.

•SFS for the solid fuel buffer sensor (optional)

The connection occurs to variable input 1 – variable input 3 depending on the assignment to an available variable input.

•If no solid fuel buffer sensor is connected, the collector tank/buffer sensor value (dedicated sensor input) is accepted as the buffer sensor. In this way, the collector tank/buffer sensor input can be used as a sensor input for several uncontrolled heat generators (e.g. solar or solid-fuel).

ATTENTION

Note the sensor position and stratification conditions.

A forced switch-on will be initiated for the solid fuel loading pump if a solid-fuel boiler sensor is defective.

Function The solid-fuel function allows the integration of solid-fuel boilers (usually in combination with a buffer tank) into the system to support heating. Under this function the solid fuel loading pump can be controlled through various switching conditions as described in the following.

Solid-fuel boiler minimum temperature limit

If the temperature in the solid-fuel boiler rises 10 K above the set value, the solid-fuel loading pump is enabled.

If the temperature in the solid-fuel boiler undershoots the minimum boiler temperature, the solid-fuel loading pump is switched off and loading is interrupted.

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Honeywell EN2H-0221GE51 R0808 service manual Solid fuel function, Solid-fuel boiler minimum temperature limit
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