3M 50 - Manual (Page 11)

PG
10
PG
10
PG
11
Touch to return to the MENU screen.
Chirp set
- Touch this to turn the audible chirp sound on or off.
F
C
Set - Touch this to change the temperature display scale from oF to oC .
FILTER
- AIR FILTER ALERT - The 3M-50 can be programmed to remind you when the HVAC
sytem’s air filter needs changing.
Touch FILTER. The display will show the usage to date.
Touch FILTER for over 3 seconds and the display will change to LIMIT.
Touch arrows to set desired usage limit before filter alert comes on home screen.
When this limit is reached, FILTER will be on home screen and the CHECK FILTER indicator lights.
Limit may be set from 0 to 999 days/99 weeks; default is 90 days/12 weeks. Touch to reset.
To reset the usage back to 0, touch usage number; touching it again restores the displayed usage.
Touch
to return to the MENU screen.
LOCK
(The 3M-50 has 2 lock modes)
Touch icon for 5 seconds; the unit will go into the PARTIAL lock mode. The user can temporarily
override the 3M-50 target with the +/- buttons only. (1 bar)
For FULL lock : Touch the (1 bar) icon again for 5 seconds to go to full lock. No changes can be
made in full lock (2 bars). Once locked, the 3M-50 will respond just to mode and menu.