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11 68-0134
T8624C,D
INSTALLATION • CHECKOUT
Fig. 11—Mounting thermostat on subbase.
M3764
PM
RETURN
MON
HEAT ON
SYSTEM
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Checkout
HEATING
Move the system switch to HEAT and the fan switch
to AUTO. Press WARMER key until the setting is about
10° F [6° C] above room temperature. Heating should
start (both stages if multistage), and the fan should run
(may be a short delay on forced air systems). Press
COOLER key until the setting is about 10° F [6° C]
below room temperature. The heating equipment should
shut off, followed by the fan.
NOTE: On an AUTO changeover thermostat, the cool-
ing temperature must be set at least 3° F [2° C] above
the heating temperature, or display will flash.
COOLING
CAUTION
Do not operate cooling if outdoor temperature
is below 50° F [10° C]. Refer to manufacturer
recommendations.
NOTE: When cooling setting is changed, thermostat
will wait up to five minutes before turning on the
cooling equipment. This delay is to protect the com-
pressor.
Move the system switch to COOL and the fan switch
to AUTO. Press COOLER key until the setting is about
10° F [6° C] below room temperature. The cooling
equipment and fan should start (both stages if multi-
stage). Press WARMER key until the setting is about
10° F [6° C] above room temperature. The cooling
equipment and fan equipment should stop.
NOTE: On an AUTO changeover thermostat, the heat-
ing temperature must be set at least 3° F [2° C] below
the cooling temperature, or display will flash.
FAN
Move the system switch to OFF, and the fan switch to
ON. The fan should run continuously. When the fan
switch is in the AUTO position, the fan operates directly
with the thermostat call for cooling and also with the
!