SD Carel USA
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10. Operating The SD 2000 Humidifier Controller
The SD 2000 controllers all have the same general display and keypad as shown below. Initially, the CDC and CDP
controllers default to display of the amperage, while the CDH and CDD controllers default to display of the relative
humidity. Some indicators are simply for display while others blink and can be modified.
1. Relative humidity or temperature displayed
2. Fill water conductivity displayed
3. Alarm condition active
4. Selected set point value
5. Humidification ON
6. Alarm condition
7. Reset button (press to reset alarms)
8. Selection button (press to move cursor in display)
9. Parameter increase button
10. LCD Display
11. Actual current (Amps) displayed
12. Selected maximum steam output displayed
13. Configuration displayed
14. Selected differential
15. Water filling
16. Water draining
17. Manual drain button
18. Parameter decrease button
Parameter Valve Default Setting
Max Production 30%-100% of kg steam output 70% of kg steam output
Set Point (%RH) 0-100 50
Differential (%RH) 1-19 4
High Limit Alarm (%RH) 0-100 80
Low Limit Alarm (%RH) 0-100 20
Type of Drain Cd or Td Cd
10.1. Available Controller Types
CDC 303: control is ON-OFF. The controller has an external dry contact input coming from any ON-OFF external
controller. The only selectable parameter is the maximum steam production.
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