Led Indicators - Robertshaw 9555 User Manual

110-975D En.qxd
Changing Fahrenheit (F) to Celsius (C),
Temperature Differential, Deadband,
and Residual Cool
The temperature differential is factory set at 1°F (0.5°C) for the 1
differential and 2°F (1.0°C) for the 2
changeover is set at 3°F (1.5°C). To change settings:
1. The thermostat is preset to display the temperature in degrees
Fahrenheit (U.S. models) or degrees Celsius (Canadian models). The
temperature display can be changed. Press and hold both the
buttons for three seconds. The display will read F or C. Release the
buttons. Press either the
2. After three seconds, the display will switch to the differential
settings. The display will read DIFFERENTIAL 1
3. The temperature differential is factory set at 1°F (0.5°C) for the first
stage. Press either the
differential between 0.5°F - 3°F.
4. Either wait three seconds or press the
indicate: DIFFERENTIAL 2
5. The 2nd stage differential is factory set at 2°F (1.5°C). Press either
the or
between 1°F - 6°F (1°C - 3°C).
6. Press the
between 5 to 40 minutes. Either wait 5 seconds or press the
button.
7. Either wait three seconds or press the
indicate: AUTOCHANGE DEADBAND.
8. Press either the
2°F - 8°F (1.0°C - 4.5°C).
9. Either wait three seconds or press the
ON will be displayed.
10. Press either the
between 0, 30, 60, or 90 seconds.
11. The display will return to the original room temperature display after
a few seconds.

LED Indicators

The Robertshaw 9555 uses three LED indicators (in addition to icons on
the LCD display) to indicate functionality of the thermostat. When illumi-
nated, the right orange LED indicates that the thermostat is calling for
heat. The left green LED indicates a call for cool. When the middle
amber LED is illuminated, the thermostat is calling for second stage
heating or cooling. If this LED is illuminated too frequently during periods
of moderate temperature, check the differential settings (see
Temperature Differential and Deadband section).
5/13/03 2:43 PM
ND stage. The deadband for auto
or
or button to adjust the 1
ND .
button to adjust the 2nd stage temperature differential
or button to adjust the 2nd stage timed differential
or button to adjust the deadband between
or button to adjust the residual cool fan delay
10
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button to change the display.
ST .
ST
button. The display will
button. The display will
button. The fan icon and
(Black plate)
stage
ST
and
stage