Operation with Advanced Microprocessor Controls
Enable
Enable Common
Set Custom
NOTE
A maximum of two of the alarm messages can be your own message.
They can be in any location(s) 1 through 4. The text for custom alarms can be changed at any time by selecting “SET CUSTOM ALARMS.” To change the text for a custom alarm, select “SELECT ALARM.” Then, select the alarm you would like to change, 1 through 4. Using the UP/DOWN arrows will step through the list of five standard alarm messages (see list below) and the two custom alarms.
NOTE
The two custom alarm messages will be shown with what was previously programmed in them and can be changed.
Press ENTER to make your selection. To modify the two custom alarm messages, go back one screen and select “CHANGE CUSTOM TXT 1” (or 2). Text can be up to 20 characters in length and can be any of the following characters (or a blank space):
Standard Custom Alarm Messages
•WATER UNDER FLOOR
•SMOKE DETECTED
•STANDBY GC PUMP ON
•LOSS OF WATER FLOW
•STANDBY UNIT ON
For more information concerning alarms, see 5.0 - Alarm Descriptions.
Humidity (HUM) Control Method
The user may select between relative (direct) and absolute (predictive) humidity control. If relative is selected, the RH control is taken directly from the RH sensor. If absolute is selected, the RH control is automatically adjusted as the return air temperature deviates from the desired temperature setpoint. This results in a predictive humidity control. The display will indicate % RH for both methods of con- trol, but the adjusted humidity reading will be displayed if absolute is selected. With absolute humid- ity control, the humidity control is automatically adjusted approximately 2% RH for each degree difference between the return air temperature and the temperature setpoint.
With relative humidity control, unnecessary dehumidification can result when overcooling occurs dur- ing a dehumidification cycle. This is because a higher than normal RH reading is caused by overcool- ing the room (about 2% RH for each degree of overcooling). This extends the dehumidification cycle.
Later, when the dehumidification ends and the temperature rises to the setpoint, the RH reading falls. The final RH reading will then be lower than actually desired. If the overcooling was significant enough, the RH could be low enough to activate the humidifier.
If absolute humidity control is selected,
10