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most serious hazards which will result in severe personal
injury or death. WARNING signifies hazards which could
result in personal injury or death. CAUTION is used to
identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.
Introduction
The communicating system consists of several intelligent
communicating components which includes the Observer
Control, variable speed furnace or fan coil, 2stage AC or
HP, which continually communicate with each other via a
fourwire communication bus. Commands, operating condi
tions, and other data are passed continually between com
ponents over the communication bus. The result is an en
hanced level of comfort, versatility, and simplicity. All
communicating furnaces or fan coils are variablespeed and
multistage for maximum flexibility, efficiency, and comfort.
They support controlled humidification, dehumidification, and
air quality control. Either a communicating, or a standard
24VAC controlled outdoor unit may be used. When using
conventional outdoor units, the communicating furnace or
fan coil provides the 24 volt signals needed to control them.
All system components are controlled through the wall
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