Liebert iCOM Microprocessor TM-10098 - Manual (Page 42)

iCOM
Control Training and Service Manual
Freecooling and Dual cooling will operate in the same manner as chilled water
with the supervision of the Supply Limit, again showing different valve positions on
the units
If in a Freecooling or Dual Cooling unit if the limit of the coil operation is detected
(no free cooling or no CW available) the valve will close off and unit will become
DX operation in the system.
Networking and Functions
Unit 2 Unit (U2U) Communications by networking will allow the following
functions to be placed into operation when the requirements exist. The user
must install the correct hardware and properly program the units for the
functionality.
In the
iCOM Network the owner may perform the following functions:
The Teamwork Mode functions, which allow multiple stages of Cooling/ Heating
and/ or Humidification/ Dehumidification. The ability to prevent the units fighting is
included in this feature.
The Lead/ Lag function, which allows one or more units to be set as “Running and
Standby” for activation in case of an alarm. This also has the ability to be
programmed in a rotation for assurance of functional standbys.
The Cascade function, which allows additional units to be staged on based on the
temperature or humidity requirement.
Understanding the
iCOM Network setup process:
To setup a system network with the
iCOM control requires a complete
understanding of the control processes and parameter programming to insure the
proper functional operation without incident. To insure the setup is correct and
that the operation will function as selected you need to map both the room layout
and the unit setup. First, read and record all programmed settings in all of the
single units. Second, document the network parameter settings that are needed
and identify the numerical order of the units to be networked. The order of the
setup process is very important.
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