IM 968-4 • MICROTECH III CHILLER UNIT CONTROLLER 8
www.DaikinApplied.com
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Installation and Mounting
The following section describes how to field install a new
L
on
W
orks
communication module or replace an existing
module on the MicroTech III chiller unit controller.
CAUTION
Electrostatic discharge hazard . Can cause equipment
damage .
This equipment contains sensitive electronic components that may
be damaged by electrostatic discharge from your hands. Before you
handle a communication module, you need to touch a grounded object,
such as the metal enclosure, in order to discharge the electrostatic
potential from your body.
WARNING
Electric shock hazard . Can cause personal injury or
equipment damage
.
This equipment must be properly grounded. Only personnel
knowledgeable in the operation of the equipment being controlled must
perform connections and service to the unit controller.
Field Installation Kit
The
L
on
W
orks
communication module field-installed kit ships
with the following items:
• The
L
on
W
orks
communication module
• Board-to-board connector -
Figure 6
• This Manual (IM 968)
Installing a new Communication Module
Follow these steps to install a
L
on
W
orks
communication
module on the unit controller. The communication module
can be connected directly to the unit controller itself or to an
existing module, if one is attached.
1. Set the Unit On/Off Switch to “Off” from inside the control
panel of the unit.
This must be done prior to installing
a new communication module.
See
Figure 7
for switch
location.
Figure 7: Chiller Unit Controller On/Off Switch
2. Remove power from the unit controller.
3. Carefully remove the blue plastic knockout strip on
the far left end of the unit controller itself (or additional
module, if present).
Figure 8
shows the knockout strip
after it has been removed from the unit controller.
To prevent damage to the unit controller, insert a
small flathead screwdriver or similar tool into the
tab on the bottom of the unit controller and pull the
screwdriver away from the controller.
4. Carefully remove the blue plastic knockout strip on the
right side of the
L
on
W
orks
communication module.
Figure 8: Communication Module and Knockout
5. Insert the board-to-board connector into the
L
on
W
orks
communication module. Note that it only fits one way and
that the baffles must line up with corresponding slots in
L
on
W
orks
communication module and the unit controller
(
Figure 8
and
Figure 9
).
Unit On/Off
Switch
Knockout
permanently
removed
Slot in module
must
line up
with baffle in the board-to-
board connector
Board-to-board connector
