34 AFDH-SVN004C-EN
Installation
Removal of Electrical Connections
to the Existing Starter
1. Turn off the main power disconnect to the chiller and
then follow the correct lockout/tagout safety
procedures to ensure that main power to the machine
cannot be inadvertently restored.
a. For additional safety, also open all starter and
control
panel disconnect switches and secure them
in the open position.
b. Depending upon the starter type, proceed to verify
that
no electrical power exists at either the starter
breaker, or starter disconnect switch, or starter
terminal block, and other starter components
before starting the process of wiring removal.
2. Note the orientation of the power cable connections to
the
starter breaker, or starter disconnect switch, or
starter terminal block.
a. Identify and clearly label the L1, L2, L3, and Ground
wiring
cables before they are disconnected.
3. Identify and clearly label the power wiring cables at the
compressor
motor terminal lugs T1, T2, T3, T4, T5, and
T6 and then disconnect them.
a. Also disconnect the cables from their connection
points
on the starter and remove them from the
cabinet area to prevent them from getting in the
way during the rest of the starter removal process.
b. Keep the motor terminal lugs. They will be reused
later
in the installation.
4. At the starter cabinet, identify and clearly label the
control
and communication wiring running to the
starter panel.
a. Also identify and record the termination point of
each
wire at the terminal block and then disconnect
them.
b. Remove and save the conduit fittings from the line,
load,
and control power entrances and exits on the
starter cabinet.
c. Remove and save the conduit top plate for possible
reuse
later in the installation.
Mechanical Removal of Existing
Unit-Mounted Starter
1. Depending upon model type, a unit-mounted starter
can weigh up to 750 pounds.
a. Verify that the intended lifting device and rigging
has
the capacity to safely handle the load before
hooking up to the designated lifting points on the
starter unit.
Note: On
some existing starters, lifting tabs are spot-
welded to the enclosure. These welds can break
if not lifted straight up. To ensure a safe lift,
Trane recommends drilling a hole and bolting
the tabs to the enclosure to ensure a safe lift.
2. Using safe lifting practices, slowly begin taking up the
slack
in the rigging.
a. Tension the rigging only to the point that is
necessary
to take up enough of the weight of the
starter panel to enable loosening the bolts
connecting the panel.
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives or
other energy storing components provided by Trane or
others, refer to the appropriate manufacturer’s literature
for allowable waiting periods for discharge of
capacitors. Verify with a CAT III or IV voltmeter rated per
NFPA 70E that all capacitors have discharged.
For additional information regarding the safe discharge of
capacitors, see PROD-SVB06*-EN.
WARNING
Heavy Objects!
Failure to follow instructions below or properly lift unit
could result in unit dropping and possibly crushing
operator/technician which could result in death or
serious injury, and equipment or property-only damage.
Ensure that all the lifting equipment used is properly
rated for the weight of the unit being lifted. Each of the
cables (chains or slings), hooks, and shackles used to
lift the unit must be capable of supporting the entire
weight of the unit. Lifting cables (chains or slings) may
not be of the same length. Adjust as necessary for even
unit lift.
WARNING
Improper Unit Lift!
Failure to properly lift unit in a LEVEL position could
result in unit dropping and possibly crushing operator/
technician which could result in death or serious injury,
and equipment or property-only damage. An AFDH
cabinet assembly is top heavy. Test lift unit
approximately 24 inches (61 cm) to verify proper center
of gravity lift point. To avoid dropping of unit,
reposition lifting point if unit is not level.
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