Trane CVGF500 Installation, Operation & Maintenance Manual page 82

Installation: Electrical
Starter to Motor (Remote- Mounted Starters Only)
Ground Wire Terminal Lugs
Ground wire lugs are provided in the motor terminal box and in the starter panel.
Terminal Clamps
Terminal clamps are supplied with the motor terminals to accommodate either bus
bars or standard motor terminal wire lugs. Terminal clamps provide additional surface
area to minimize the possibility of improper electrical connections.
Wire Terminal Lugs
Wire terminal lugs must be fieldsupplied.
1. Use field-provided crimp-type wire terminal lugs properly sized for the application.
Note: Wire size ranges for the starter line and load-side lugs are listed on the starter
submittal drawings supplied by the starter manufacturer or Trane. Carefully review the
submitted wire lug sizes for compatibility with the conductor sizes specified by the
electrical engineer or contractor.
2. A terminal clamp with a 3/8" bolt is provided on each motor terminal stud; use the
factor-supplied Belleville washers on the wire lug connections. Figure 30 illustrates the
juncture between a motor terminal stud and terminal clamp.
3. Tighten each bolt to 24 footpounds.
4. Install but do not connect the power leads between the starter and compressor mo-
tor. (These connections will be completed under supervision of a qualified Trane ser-
vice engineer after the prestart inspection).
CAUTION
Correct motor wire terminations!
Ensure the power supply wiring and output motor wiring are connected to the proper
terminals. Failure to do so will cause catastrophic failure of the starter and, or the mo-
tor.
Bus Bars
Install bus bars between the motor terminals when a lowvoltage "across-the-line, "
"primary reactor/resistor, " "auto transformer, " customer-supplied solid-state starter,
or customersupplied AFD are field applied.
Be sure to bus motor terminal T1 to T6, T2 to T4, and T3 to T5.
Note: Bus bars are not needed in high-voltage applications since only 3 terminals are
used in the motor and starter.
Starter to UCP (Remote- Mounted Starters Only)
Electrical connections required between the remote-mounted starter and the unit con-
trol panel are shown in an example of a point-to-point starter-to-UCP connection dia-
gram as shown at the end of the manual.
Note: Install control voltage conduit into control voltage section of chiller control panel
and starter panel. Do not route with low voltage (30 volts) conduit wires.
When sizing and installing the electrical conductors for these circuits, follow the
guidelines listed.
Unless otherwise specified use 14 ga. wire for 120 V control circuits.
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