Hydraulic Components

SDC / DHC

 

 

NOTE Excessively long extended running times unnecessarily interrupt heating and increase the temperature in the hot-water tank.

Depending on the parameter setting, a setpoint present in the system may or may not be forwarded to the heat generator during the extended running time

The boiler is operated according to the following rules during a tank pump extended running time:

–

Parallel hot-

Hot-water

Conditional hot-

 

water peration

priority mode

water priority mode

 

 

 

 

 

–

 

 

DC

MC

 

HC setpoint

HC setpoint

setpoint

setpoint

 

 

 

 

 

AUTO

Active

OFF

OFF

Active

 

 

 

 

 

OFF

OFF

OFF

OFF

OFF

 

 

 

 

 

Tank sensor 2 For complete loading of a hot-water tank by means of automatic measuring point switch-over between tank sensors 1 and 2 (layer loading). The measured value of the hotter sensor (SF1 or SF2) is evaluated for the activation of the loading pump. Termination of loading is carried out on the basis of the measured value of the colder sensor. The set values for the hot-water setpoint temperature and the specified hot-water switching differential continue to apply.

See also 5.2.4 "DHW" menu, pg. 77

Quick hot-water connection in cascaded systems

With cascaded systems, it is often the case that all heat generators are often not needed for hot-water production. In addition, the required heat generators must be connected faster than when heating.

Function If there is a demand for hot water, a fixed value of 10 seconds is used for connection of the subsequent stages up to the set maximum stage number for quick hot-water connection instead of the general connection delay ("Cascading" menu, parameter 02).

For further stages, connection occurs based on the connection delay that can be set.

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Honeywell EN2H-0221GE51 R0808 service manual Auto, Quick hot-water connection in cascaded systems
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EN2H-0221GE51 R0808 specifications

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