Issue
Checking operation of CSC.
Product Line
Field Devices
Environment
- CSC5252
- CSC5352
Cause
The operation of the CSC compensator explanation.
Resolution
The operation of a compensator is to adjust the system flow temperature, in relation to changes in the outside air temperature. The system flow temperature can be further adjusted by the addition of a room temperature sensor, which will provide room influence.
The CSC 5252/5352 controller is programmed with a complete set of "Default" settings, these settings will allow the controller to operate as soon as its powered up.
Although the controller has a complete range of adjustable settings, accessed through the "Fine Tune Mode", for a basic installation the "Quick Set Mode" can be used. The screen shot below explains how to enter the Quick Set Mode and the settings available.
Compensated Flow Temperature Set-point:
The compensated flow temperature set-point is automatically adjusted based on a ratio for set-point adjustments against the outside temperature changes.
A consistent ratio across the entire outside temperature range, may not provide suitable control.
For example: with radiator type systems, radiators are less efficient at lower water flow temperatures and need to be provided with a higher temperature to compensate for this initially.
The “Set compensator ratio 1”and the “Set Ratio 2” settings provide the ratio of the change to the flow temperature set-point for changes in the outside air temperature, the ratio used is based on the “Set Change-over Value”, with the compensated slope starting from the “Set Flow Origin”.
The “Set Flow Temperature Set-up Value” and “Set Night Set Back Value” provide a constant adjustment of the flow temperature set-point to a given building control requirement.
The default settings would give a resultant flow temperature as shown follows:
The CSC5352 Calculator presents these settings in a graphical and listed format, making it easier to visually confirm the effects any changes to these settings would make.
