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1. Outdoor Remote Sensor
2. Heating (Flame %), Cooling (Snowflake ☛)
3. Days of the week
4. MODE button (Toggles between Heat, Cool, Auto, Off)
5. Temporary Override
6. FAN button (Toggles between Constant or Automatic
Fan)
7. Communication Link established
8. Perimeter Heat LED
9. Room Temperature Display
10. Temperature Setpoint change
11. Events (Morning ✣, Day ✥, Evening ✤, Night ✠)
12. Time of day or Mode of Operation
13. OUTDOOR button (Displays outdoor temperature)
14. Keypad locked
15. ZONE button (Displays zone number of thermostat)
16. Fan
17. ✟ ✞ buttons (Raise or lower setpoint or toggle
between ˚C or ˚F when pressed simultaneously)
1. Perimeter Heat LED
2. Date Code & Model Number
3. DIP Switch
4. Printed circuit board
5. Thermistor: measures room temperature
DSL-520P USER INTERFACE, LED AND SWITCHES
4
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