Demand Duo
™
R
-
Series Installation and Operation Manual
42
To eliminate the beeps when keys are pressed
follow the steps below.
1.
Press and hold both the
(Up) and
(Down) buttons at the same time until a beep
is heard (approximately 5 seconds). Then,
release both buttons.
To turn on the beeps, repeat the above steps.
L O C
1.
To lock the controller, press and hold down
the
“
Priority
”
button.
2.
While holding down the
“
Priority
”
button,
press the
(Up) button until a beep is heard
(approximately 5 seconds). Then, release
both buttons at the same time.
3. appears in the display indicating the
controller is locked.
NOTE
The display flashes between and
the set temperature to indicate the controller
is locked.
To unlock the controller, follow the above steps.
❶
❷
❶
Figure 37
Figure 38
