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L3711C 7-DAY PROGRAMMABLE THERMOSTAT
Thermostat Output Table
Table 4 depicts the L3711C thermostat output states for
various input conditions.
Table 4. L3711C Thermostat Outputs
Condition
W1
Y1
G
Gas Heat, Auto Fan
Heat Demand
X
Cool Demand
X
X
No Demand
Gas Heat, Continuous Fan
Heat Demand
X
X
Cool Demand
X
X
No Demand
X
Electric Heat, Auto Fan
Heat Demand
X
X
Cool Demand
X
X
No Demand
Electric Heat, Continuous Fan
Heat Demand
X
X
Cool Demand
X
X
No Demand
X
NOTE − X = output is activated with 24VAC.
Technical Specifications
Thermostat Type
Electronic programmable thermostat for 1-Stage
Heat/1-Stage Cool, gas or electric heat, non−heat pump,
non−power robbing applications.
Power Supply Range
18VAC − 30VAC (24VAC nominal), 60Hz
CAUTION
24VAC is present on the terminals of the thermostat
bracket. If removing the thermostat from the wall,
use caution and avoid touching any of the connec-
tor terminals on the wall bracket.
Also, when working with the thermostat dip
switches, use a non−conductive tool and take cau-
tion to avoid making any contact with the circuit
board, its imprinted circuitry and its connector
prongs.
Temperature Display
Display Scale: Fahrenheit or Celsius user selectable (via
DIP switch; see figure 17)
Display range: 35°F (2°C) to 99°F (37°C)
Display resolution: 1°F (1°C)
Display Accuracy: +/−1°F
If the Fahrenheit/Celsius display must be changed, use a
plastic, non−conductive tool to push the dip switch to the
right position (see figure 17).
F/C (Fahrenheit/Celsius) switch
shown in Celsius position
1
2
3
4
5
6
7
PLUG IN (Use Care To Avoid Bending Prongs.)
Figure 17. Changing Fahrenheit/Celsius Setting
Indoor Temperature Measurement Range
Measurement Scale: Fahrenheit
Measurement Range: 35°F to 99°F
Measurement Resolution: 0.5°F
Measurement Accuracy: +/−1°F
Field Offset: via DIP switches to +/−3°F
Sampling Method: temperature measurements sampled
every 15 seconds. Displayed temperature is the average
of the last four measurements.
Outdoor Temperature Measurement Range
Measurement Scale: Fahrenheit
Measurement Range: −22°F to 122°F
Measurement Resolution: 1°F
Measurement Accuracy: +/−2°F
Temperature Setpoint Range
Setting range: 50°F (10°C) to 90°F (32°C)
Setting resolution: 1°F (1°C)
Smart Setback Recovery (via DIP switch #6)
Smart Setback Recovery (SSR) affects the way the ther-
mostat responds to program events. If SSR is disabled, the
thermostat will react to a program event at the time the
event occurs. However, if SSR is enabled, the thermostat
will react to a program event before the event occurs such
that the desired temperature is reached at the time of the
event, not after.
Autochangeover Deadband Selection (via DIP
switch #7)
Autochangeover deadband can be set to 4 or 6 degrees.
When autochangeover is enabled (via the AUTO button),
the thermostat will automatically change over from heating
to cooling and vice versa, to keep the room temperature in
between the heating and cooling setpoints. The deadband
is the minimum difference between the heating and cooling
setpoints.
Fan Control
AUTO or ON modes, gas or electric heat compatible via
DIP switches (also see Thermostat Output section).
I/O Relays
All thermostat relays are latching type to minimize power
consumption.
