Aprilaire 8353 User Manual page 3

Installing the Model 8353 Thermostat
NOTE: For new installations, mount thermostat on inside wall, 4-5 feet
above the floor. Do not install behind a door, in a corner, near air vents,
in direct sunlight, or near any heat or steam generating fixtures.
Installation at these places will affect thermostat operation.
1. Turn power off to the heating and cooling systems.
2. Place COOL-OFF-HEAT In OFF position.
PROG
MAN
SET PROG/MAN
3. Place FAN: AUTO–ON switch
Into AUTO position.
4. Remove the cover using a coin
or screwdriver.
5. Place thermostat against the wall at desired location. Make sure
wires will feed through opening on base of thermostat.
6. Mark placement of mounting holes. See Fig. 3. Set base aside.
COOL-OFF-HEAT FAN: AUTO - ON
Figure 1
FAN: AUTO-ON
Figure 2
3
COOL-OFF-HEAT