Saswell SAS900STK-2, Руководство по эксплуатации

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3.
Select system heating type
Users can select the system heating type according to their heating system.
Select 0 for gas, oil, or electric heating systems. Select 1 for a heat pump heating
system.
4.
Select display backlight
The display backlight improves display contrast in low lighting
conditions. Select 1 for NO backlight display. Select 2 for the backlight to come
on for approximately 30 seconds when any button of the thermostat is touched.
Select
3 for the backlight to remain on continuously.
NOTE: When operated from batteries (No “C” terminal connection), the LCD
display backlight options are limited to option 1 (disabled) or option 2 (30