Hydraulic Components

SDC / DHC

 

 

Switching differential I Switching differential I controls the heat generator capacity required according to load and demand by switching on and off the stage required for the actual heat demand within the set range. Switching on and off is initiated symmetrically to the setpoint within half of the absolute value of the switching differential.

Switching differential II Switching differential II (only two-stage heat generator and heat generator 2 x single stage) determines how many stages are required to meet the actual heat demand (partial load - stage I, full load - stage II). This switching differential is overlaid symmetrically on switching differential I and must always be set to higher values.

NOTE In cascade mode, this setting would be superseded by the cascade setting and is therefore not available.

Mode of operation with switching differential II

•When the heat generator temperature is below switching differential II, stage I is switched on without delay. Stage II is enabled after stage II delay has passed (see "Heat Generator" menu).

•Stage II is switched off as soon as the heat generator reaches the setpoint temperature plus half of switching differential I.

•Stage II is switched on again as soon as the heat generator undershoots the setpoint temperature minus half of switching differential I.

•Stage I is switched off when the heat generator temperature exceeds the set nominal value plus half of switching differential II.

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EN2H-0221GE51 R0808

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Honeywell EN2H-0221GE51 R0808 service manual Mode of operation with switching differential
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EN2H-0221GE51 R0808 specifications

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