Hydraulic Components

SDC / DHC

 

 

7.2.11Switch-off of district heating control

Operation "District Heating" menu, parameter 01: Setting range is extended to OFF,

–10 ... +50.

Function Setting OFF means district heating is deactivated.

District heating valve permanently in STOP position when deactivated.

The switch-over of the heat generator is controlled from the "District Heating" menu, parameter 01.

7.2.12Return interval flushing

If the return max. limit is active and the district heating valve is opened less than 5%, the district heating valve is opened to 10% every 10 minutes for heat demand, so as to obtain an adequately precise return temperature measurement. This assures that the limit sensor is adequately supplied in the return.

7.2.13Heat meter for additional limitation according to the volume flow or thermal output

The requirement for this function is the heat meter, whose information (pulse per volume or pulse per thermal output) is called upon for this limit. Calibration of the thermal output and the volume flow with parameters 12 and 13 allows calculating the entities thermal output and volume flow. These values are displayed with the ¤ key. Setpoint limits for thermal output and volume flow are entered under parameters 14 and 15.

This limitation function operates as PI controller above the setpoint value, using the same parameters as the temperature control function.

The values are independent of the outside temperature. The heat flow is derived from a volume signal in the following way:

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Honeywell EN2H-0221GE51 R0808 service manual Switch-off of district heating control, Return interval flushing
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EN2H-0221GE51 R0808 specifications

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