Lennox International Inc XP1906, XP2101, XC2105, XC1702 Supports, Outdoor Temperature Sensor option

icomfort Wi-Fit Thermostat − Technical Description and Features

The 24VAC icomfort Wi-Fit thermostat (figure 1) is an electronic communi- cating, color display touchscreen, 7−day programmable thermostat. It stores system parameters and settings in nonvolatile memory (i.e., it retains data when electrical power fails or is turned off). It is designed for 4−wire connec- tion to other communication devices as listed in figure 1.

The icomfort Wi-Fit thermostat can connect to online services via the inter- net through the homeowner’s Wi−Fi access point. After online registration is completed, the system may then be accessed by the homeowner from any- where using a remote internet connection via computer or personal commu- nicating device.

R i+ i− C Thermostatconnections

BEST PRACTICES! Keep all communication wiring as far away from house electrical wiring and large electrical appliances as possible (15’ [5m] recom- mended).

The thermostat also:

Ssupports three languages (English, French, Spanish),

Ssupports air conditioning units or heat pump units with up to four stages of heat / two stages of compressor operation (2 stages of heat pump heating, 2 stages of auxiliary back−up heating, 2 stages of emergency heating),

Ssupports Indoor Air Quality with time-based notification of consum- ables including media filters, UVC bulbs, humidifier pads, and Pure- Airt system catalyst service / replacement,

Ssupports variable−capacity / multi−stage heat/cool, universal compati- bility (gas/electric/heat pump/ac), and is dual fuel capable (icomfort− enabled HP only) with two balance points.

Important

RSBus Minimum wire size is 18 gauge

RED

YELLOW

WHITE

GREEN

Maximum total length of all connections on the RSBus is limited to 1500 ft. (450 m). Max. length between compo- nents is 300 ft. (90 m).

Connections to non−communicating outdoor units and accessories are de- scribed in the Quick−Start Installation guide. (Wiring diagrams are also shown beginning on Page 59 of this manual.)

Supports

S	Humidification Measurement and Control,
S	Dew Point Adjustment Control
S	Dehumidification Measurement and Control
S	Humiditrol® Enhanced Dehumidification Accessory (EDA)

icomfortt−enabled Furnace Control icomfortt−enabled Air Handler Control icomfortt−enabled Outdoor Unit Control

External Sensors − outdoor temperature, discharge air Humidify Control

Dehumidify Control

Note: icomfort Wi-Fit thermo- stat does not require shielded cable wiring.

S	Multi-Stage HVAC Systems
S	Equipment Maintenance Reminders
S	Autochangeover Mode −− Permits control of heating, cooling, humidifi-
	cation, and dehumidification without user involvement.

Outdoor Temperature Sensor (option)

Figure 1. icomfort by Lennoxt system

Communicating outdoor units contain a built−in outdoor temperature sensor.

Page 3 icomfort Wi-Fit 7−Day Programmable Communicating Thermostat