External Components; Connecting Low Voltage Wiring; Control Wiring Requirements; Discharge Air Temperature Sensor (Dats) - Lennox iComfort S30 Installation And Setup Manual

E C
xtErnal omponEnts
• 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, the proximity sensor takes the HD Display out of screen saver mode
automatically and returns to the home screen when someone approaches.
• Power button - Turns off the HD Display when pressed and held for about
five (5) seconds.
• microSD card slot - Not functional, for future use.
• Micro USB connector - Not functional, for future use.
microSD Slot
Micro USB Connector
Power Button
Figure 3. HD Display Components

Connecting Low Voltage Wiring

The following diagrams in this section illustrates the basic Lennox control wiring
for all compatible components.
C W r
ontrol IrIng EquIrEmEnts
The following is the wiring specification requirements for installation of this
system.
• iComfort wiring size is 18 #AWG.
• Thermostat does not required shielded cable wiring.
• Maximum total length of all connections combined is 1500 feet (457 meters).
• Maximum length between components is 300 feet (90 meters).
Proximity Sensor
D a t s
IsChargE Ir EmpEraturE Ensor
Installation of discharge air temperature sensor (DATS) (88K38) must comply
with the following requirements:
• Installed downstream of the heat exchanger or electric heat elements.
• It must be placed in free airflow, where other accessories (such as humidifiers,
UV lights, etc.) will not interfere with its accuracy.
• Wiring distance between the integrated furnace and air handler controls or
damper control module and the discharge air sensor must not exceed 10 feet
(3 meters) when wired with 18 #AWG thermostat wire.
• DATS is highly recommended for all systems that include a modulating
outdoor unit in order to provided more precise dehumidification operation.
o a t s
utDoor Ir EmpEraturE Ensor
The optional outdoor air (temperature) sensor (OAS) (X2658) wiring distance
to the iComfort S30 should not exceed 150 feet (45 meters) when wired with
minimum 22 #AWG (recommend 18 #AWG) dedicated 2-conductor thermostat
cable. Installation of OAS 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.
r E n
EDuCIng lECtrICal oIsE on
h o p a S.
uB anD ptIonal urE Ir
Communicating systems requires four thermostat wires between the Mag-
Mount and Smart Hub. Four wires are also used between the Smart Hub and
indoor/outdoor units as well. When a thermostat cable with more than four
wires is used, the extra wires must be properly connected to avoid electrical
noise. The wires must not be left disconnected.
• Use wire nuts to bundle the unused wires at each end of the cable. A single
wire should then be connected to the indoor unit end of the wire bundle
and attached to the "C" terminals as shown in "Figure 4. Thermostat Wire
Termination in Communicating Systems (Electrical Noise)".
• Keep all communication wiring as far away from the house electrical wiring
and large electrical appliances as possible. Recommended minimal distance
is 15 feet (5 meters).
8
(Dats)
(oats)
C B - I ,
ommunICatIon us nDoor outDoor
, s30 s
mart