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9
IM 968-4 • MICROTECH III CHILLER UNIT CONTROLLER
Figure 9: Communication Module with Board-to-Board
Connector Inserted
6. Insert the other end of the board-to-board connector to
the far-left side of the unit controller or other module, if
attached.
7. Connect the
L
on
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orks
communication module to
the network by inserting a network cable into the
communication module’s network connector (
Figure 4)
.
8. Apply power to the unit controller.
The unit controller automatically resets itself approximately
30 seconds after power has been applied to it. This reset is
necessary so that the
L
on
W
orks
communication module can
synchronize with the unit controller.
NOTE:
There is a limit of three devices that can be attached
to the left side of the unit controller.
9. Set the Unit On/Off Switch to “On” from inside the control
panel of the unit.
Replacing a Communication Module
Follow these steps to remove an existing
L
on
W
orks
communication module from unit controller and replace it with
a new module.
1. Set the Unit On/Off Switch to “Off” from inside the control
panel of the unit. This must be done prior to replacing a
communication module. See
for switch location.
2. Remove power from the unit controller.
3. Locate the
L
on
W
orks
communication module to the left
of the unit controller (
Figure 3
).
4. Gently pull the network cable connector from the
L
on
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orks
communication module (
Figure 4)
.
5. Grasp the
L
on
W
orks
communication module and
carefully pull it from the unit controller (or from an
adjacent module, if it is attached to one.)
6. Install the new
L
on
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orks
communication module:
a. Carefully remove the blue plastic knockout strip
on the right side of the
L
on
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orks
communication
module.
b. Insert the board-to-board connector into the
L
on
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orks
communication module. Note that it only
fits one way and that the baffles must line up with
corresponding slots in the communication module
and the unit controller (
Figure 8
and
Figure 9
).
7. Insert the network cable connector into the
L
on
W
orks
communication module (
Figure 4)
.
8. Apply power to the unit controller.
The unit controller automatically resets itself approximately
30 seconds after power has been applied to it. This reset is
necessary so that the
L
on
W
orks
communication module can
synchronize with the unit controller.
9. Set the Unit On/Off Switch to “On” from inside the control
panel of the unit.
