icomfortt Technical Description
The 24VAC icomfortt thermostat stores system parameters and set- tings in a nonvolatile memory (i.e., it retains data when electrical power fails or is turned off). The thermostat (see figure 1) also:
Sincludes
Ssupports heat pumps or non−heat pump units, with up to 4 stage heat / 2 stage compressor operation. (2 stages of heat pump heat- ing and 2 stages of auxiliary backup heat are provided. Also, 2 stages of emergency heat are provided),
Ssupports Indoor Air Quality with
Ssupports variable capacity / multistage heat/cool, universal com- patibility (gas/electric/heat pump/ac), and is dual fuel capable with two balance points.
Important
Always use correct software version as recommended for replacement configuration (discovery).
Connections to non communication outdoor units and all accessories is described in the Quick−Start Installation guide. (Wiring diagrams are also shown beginning on Page 36.)
Thermostat connections
R I+ I − C
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RSBUS |
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Minimum wire size is |
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18 gauge |
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icomfortt Outdoor Units Control icomfortt Furnace Control icomfortt Air Handler Control
External Sensors − outdoor temperature and humidity Humidify control
Dehumidify control
Figure 1. icomfort thermostat system
506052−01 11/09 | Page 4 |