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Auxiliary heat is functional during the compres-
sor lockout and can be used as needed to
maintain room temperature.
• COMPRESSOR LONG TERM CYCLE PRO-
TECTION — If your system begins to operate
too soon after an extended power outage, the
compressor may be damaged due to crankcase
oil temperature change. This thermostat has a
built-in time delay of one hour less than the
power loss (up to 12 hours). When power is
restored to the system, heaters in the system
will begin to heat the crankcase oils. The
thermostat’s time delay will lock out the com-
pressor to prevent its operation until the com-
pressor oil is sufficiently warmed. During the
lockout time period, the auxiliary heating sys-
tem will operate to maintain setpoint tempera-
ture.
For example, if a power outage of three hours
occurs, the compressor will be locked out for
two hours.
• SYSTEM INDICATOR LIGHTS — The lights
on the upper right part of the thermostat indicate
system operation (see PARTS OF THE THER-
MOSTAT for specific descriptions of what each
light indicates).
• PROGRAMMABLE BLOWER CONTROL —
You may program the fan blower to run continu-
ously during any given program period, regard-
less of the cycling of the heating or cooling
system. During programming, after entering the
time and temperature for the time period, press
FAN
ON – AUTO
until FAN is displayed. To override
constant fan, press
FAN
ON – AUTO
until FAN is
displayed.
PROGRAMMING