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7
IOM - 7602-444 Communicating Service Tool
Two
connections
on DXM2
board to allow
for multi-unit
installation
Or
AIRFLOW SELECTION
TT026 S N - - - - - 1 2 3 4
TT026 S N - - - - - 5 6 7 8
TT038 S N - - - - - 9 0 1 2
PREVIOUS SELECT
OPTION SELECTION
TT026 S N - - - - - 1 2 3 4
TT026 S N - - - - - 5 6 7 8
TT038 S N - - - - - 9 0 1 2
PREVIOUS SELECT
3.6
MULTI-UNIT CONFIGURATION
If multiple units are connected to one 7602-457 thermostat
upon unit start-up, the thermostat will automatically register
the serial numbers of all units connected to it.
NOTE: Multiple units may be connected directly to the 7602-
457 thermostat or connected to one another in series, as
shown by the figure below.
3.6.1 MULTI-UNIT AIRFLOW SELECTION
In section 3.1, when an installer selects “Airflow Selection”
from the System Configuration menu, the installer may
choose the unit to configure by the last 4 digits of its serial
number from the following screen.
3.6.2
MULTI-UNIT OPTION SELECTION
In section 3.2, when an installer selects “Option Selection”
from the System Configuration menu, the installer may
choose the unit to configure by the last 4 digits of its serial
number from the following screen.
3.6.3
Multi-Unit, Unit, Pump, & Valve Configuration
To configure Unit, Pump, and Valve options in sections 3.3-
3.5, the thermostat must be connected to only one unit at a
time.