6
Sensor Wiring
The following diagrams in this section illustrates the basic Lennox control
wiring for all compatible components.
Discharge Air Temperature Sensor (DATS)
The optional discharge air temperature sensor (DATS) (88K38) wiring distance
to the iComfort S30 should not exceed 150 feet (45 meters) when wired with
minimum 22 #AWG (recommend 18 #AWG) dedicated 1-pair thermostat cable.
Installation of DATS must comply with the following requirements:
• Installed downstream of the heat exchanger or electric heat elements.
•
Must be placed in free airflow, where other accessories (such as humidifiers,
UV lights, etc.) will not interfere with accuracy.
• Wiring distance between the furnace, air handler or damper control module
controls and the discharge air sensor must not exceed 10 feet (3 meters)
when wired with 18# AWG thermostat wire.
•
DATS use is highly recommended for all systems that include a variable
capacity outdoor unit in order to provided more precise dehumidification
operation.
Outdoor Air Temperature Sensor (OATS)
The optional outdoor air (temperature) sensor (OATS) (X2658) wiring distance
to the iComfort S30 should not exceed 150 feet (45 meters) when wired with
minimum 22 #AWG (recommend 18 #AWG) dedicated 1-pair thermostat cable.
Installation of OATS must comply with the following requirements:
•
Sensor wiring must be run to avoid touching or being close to high voltage
wiring and light ballast.
• Choose a protected outdoor location away from direct sunlight or other heat
sources (usually on the north side of the building).
•
Ensure that water will neither collect on, nor wash over the sensor.
•
Do not locate the sensor near driveways or similar heat-absorbing masses
which may reflect stored heat energy onto the sensor and send inaccurate
information to the thermostat.
•
Locate the sensor away from attic and soffit vents, or furnace venting pipes.
•
Do not locate the sensor directly above an air conditioner or heat pump.
HD Display External Components
Proximity and Ambient Light Sensors
microSD slot
micro USB port
reboot button
humidity sensor
- air intake
humidity sensor
- air discharge
temperatur sensor
Subbase attached
Figure 2. HD Display 3.0 Components
•
Proximity sensor
- Detects a person approaching the HD Display. If the HD
Display is in screen saver mode and the proximity sensor setting is enabled
(factory default is ON), the proximity sensor takes the HD Display out of
screen saver mode automatically and returns to the home screen when
someone approaches. This feature can be disabled by going to
menu
>
setting
>
display
.
•
Humidity sensor
- This is the intake location for the built-in humidity sensor.
Do not block the intake location. The indoor humidity percentage is displayed
(enabled by default) on the home screen. The humidity percentage display
on the home screen can be disabled by going to
menu
>
setting
>
display
.
•
Reboot button
- Press and hold this button for approximately six (6) seconds
to reboot the HD display. No settings are lost using this procedure.
•
MicroSD card slot
- For future use.
•
Micro USB connector
- For future use.
