User manual

About the manual

The manual describes the features of your SEC-HD and how to use them; it does not describe

ventilation strategies.

 All buttons and menu commands are bolded.

For example, "Press Program until the LED for Alarm is lit."

 All LED display examples are in an LED font.

For example, "Press Up or Down until

a 20

displays and then press Select."

This is a hint or tip. It contains helpful information that might make it easier for you

to set up or use your SEC-HD.

This is a note. It contains information that may help you better understand your

SEC-HD.

This is a caution. It contains important information that you must follow when

installing or servicing your SEC-HD. Failure to follow this information can lead to

damaged controls or equipment.

This is a warning. It contains important safety information that you must follow when

installing or servicing your SEC-HD. Failure to follow this information can lead to

damaged controls or equipment, electrical shocks, or severe injury.