Aprilaire 8870 - Manual (Page 8)

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IN CASE OF POWER FAILURE
This thermostat does not require a battery. If the power goes out, the screen is blank.
During the period the power is off, the heating/cooling system will not operate. When
power is restored, the thermostat will return to the previous settings.
The thermostat is equipped with a continuous memory feature which does not require
a battery.
CLEANING
If the surface of the thermostat becomes dirty it can be cleaned with plain water or
with a non-abrasive household cleaner, including glass cleaner. When using any
cleaner be careful not to get any into the interior of the thermostat. Do not spray any
liquid directly onto the thermostat. Spray the cleaner onto a soft cloth and wipe the
surface of the thermostat.
• BALANCE POINT SET-UP – Balance points limit heat pump operation when the outdoor
temperature is too high or too low. It requires an optional support module with an
outdoor temperature sensor. Consult a qualified service technician before changing
any of the values in this Sub-Menu (Sub-Menu not shown).
• DISPLAY SET-UP – Here the temperature scale can be changed to °C or °F, and the
temperature settings can be setup to always display or only when being changed
(
see Figure 10 ). The message display, when not being used for Thermostat Set-Up
will, by default, scroll through three messages showing the status of the mode, fan, and
equipment output, a fourth date and time
can be added to this list. The date and time
must be sent daily to the thermostat from
the automation system to maintain the
accurate time. If this programming cannot
be done, it is best to not have the time
and date displayed.
FIGURE 10