SDC / DHC

 

Hydraulic Components

 

 

 

a

Calculation by the

b 21°C parameter 45 without

 

controller based on the

room sensor

 

outside temperature

 

c

Pre-heat time at 0°C

 

7.3.4.5 Room setpoint ramp

Setting range OFF, 0.5 ... 60 K/h

Function This function is only active in conjunction with an "RC" (room controller) function. The set value acts as a filter between the setpoint jump (change of the room setpoint temperature setting) and the room setpoint at the controller output. The ramp functions as an artificial down time on the control path and slows heating/cooling. Configuration of the actual control path is dependent on this.

Application In historic buildings (churches, galleries), it is important that heating up and cooling down are damped via a room setpoint value ramp so that masonry and artwork are not damaged.

The function starts with the switching times switch-on/switch-off point and the control mode change.

NOTE This function helps prevent jumps in temperature. For this reason:

•The ramp is recalculated starting from the actual room temperature after a power failure. A setpoint jump does not occur.

•If a new setpoint jump (setpoint increased, lowering initiated) occurs before the room setpoint temperature is reached, the new ramp is recalculated starting with the current actual room temperature.

•An activated ramp takes affect in all control modes.

7.3.4.6Heating limit function

This parameter supplements the summer switch-off function. It deactivates the respective heating circuit as soon as the computed flow temperature setpoint approaches the current room temperature setpoint.

The heating limit parameter can be activated separately for each heating circuit.

Function Switch-off: Flow setpoint < (current room setpoint + heating limit setting)

EN2H-0221GE51 R0808

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Honeywell EN2H-0221GE51 R0808 service manual Room setpoint ramp, Heating limit function
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EN2H-0221GE51 R0808 specifications

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