Pre-Start Checkout
RTAC-SVX01J-EN 129
1. Press the STOP key on the CH530.
2. Open the electrical disconnect or circuit protection
switch that provides line power to the line power
terminal block(s) in the starter panel (or to the unit-
mounted disconnect).
3. Connect the phase sequence indicator leads to the line
P
ower terminal block, as follows:
4. Turn power on by closing the unit supply power fused-
disconnect
switch.
5. Read the phase sequence on the indicator.The “ABC”
LED
on the face of the phase indicator will glow if
phase is “ABC.”
6. If the “CBA” indicator glows instead, open the unit
main
power disconnect and switch two line leads on
the line power terminal block(s) (or the unit mounted
disconnect). Re-close the main power disconnect and
recheck the phasing.
7. Reopen the unit disconnect and disconnect the phase
indicator.
Water System Flow Rates
Establish a balanced chilled water flow through the
evaporator.The flow rates should fall between the
minimum and maximum values given on the pressure
drop curves. Chilled water flow rates below the minimum
values will result in laminar flow, which reduces heat
transfer and causes either loss of EXV control or repeated
nuisance, low temperature, cutouts. Flow rates that are
too high can cause tube erosion in the evaporator.
Water System Pressure Drop
Measure water pressure drop through the evaporator at
the field-installed pressure taps on the system water
piping. Use the same gauge for each measurement. Do not
include valves, strainers fittings in the pressure drop
readings.
Pressure drop readings should be approximately those
shown
in the Pressure Drop Charts in the Mechanical
Installation section.
CH530 Set-Up
Use ofTechView service tool is required to view and adjust
most settings. Refer to the Controls Interface section for
instruction on adjustment of the settings.
WARNING
Hazardous Voltage w/Capacitors!
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 an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect
power and discharge capacitors before servicing could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
Phase Seq. Lead Terminal
Black (Phase A) L1
Red (Phase B) L2
Yellow (Phase C) L3
NOTICE:
Compressor Damage!
Do not interchange any load leads that are from the
unit contactors or the motor terminals. Doing so could
result in damage to the equipment.
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