Mars 70801 Instruções de Operação descarregar pdf (Página 5)

5) Set the system switch to the OFF position. The system should

shut down within several seconds. The LCD will again display

only the room temperature.

6) Set the system switch to the COOL position and depress the

blue arrow key until the temperature set point is at least 3

degrees below the room temperature. The LCD will display a

snowflake icon to indicate A/C. The cooling system should start

within several seconds. WARNING: Do not perform this test if

the outdoor temperature is below 50 F.

7) Set the system switch to the OFF position. The system should shut down within several seconds. The LCD

will again display only the room temperature.

Programming The User Settings

Temperature Differential is factory set at .5 F (0.25 C) for both heating and cooling cycles. The room tempera-

ture must change .5 F (0.25 C) from the set point temperature before the thermostat will initiate a call for heat

or A/C. This should be appropriate for most applications. However, if the system is cycling on and off too

frequently, the setting can be adjusted as follows.

1) With the system setting in the OFF position, simultaneously

depress the red and blue arrow keys. The LCD (liquid crystal

display) will display the temperature differential setting. Using

the red and blue arrow keys set the differential to the desired

setting of .5, 1, or 2. The higher the setting, the less frequent-

ly the system will cycle.

2) When the desired setting is made, release the key and the unit will automatically store the setting after 5 sec-

onds.

Image shows room temperature

of 70 and HEAT set point of 73.

Image shows room temperature

of 78 and A/C set point of 68.

Image shows temperature

differential setting of 0.5.

70801-IM 12/14/06 3:06 PM Page 5

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Mars 70801 Instruções de Operação Página 5