Pre-Start Checkout - Trane RTAA-70 Installation & Maintenance Manual

RTAA-SVX01A-EN

Pre-Start Checkout

When installation is complete, but prior to putting the unit into service, the
following pre-start procedures must be reviewed and verified correct:
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote disconnects
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.
Note: For additional information regarding the safe discharge of
capacitors, see PROD-SVB06A-EN or PROD-SVB06A-FR
• Inspect all wiring connections to be sure they are clean and tight.
• Verify that all refrigerant valves, as shown in
CAUTION
Compressor Damage!
Do not operate the unit with the compressor, oil, suction and
liquid line service valves "CLOSED" . Failure to have these "OPEN"
may cause serious compressor damage.
• Check the power supply voltage to the unit at the main power fused-dis-
connect switch. Voltage must be within the voltage utilization range,
given in Table 10 and also stamped on the unit nameplate. Voltage imbal-
ance must not exceed 2 percent. Refer to "Unit Voltage Imbalance" .
• Check the unit power phasing to be sure that it has been installed in an
"ABC" sequence. Refer to "Unit Voltage Phasing. "
CAUTION
Equipment Damage!
It is imperative that L1-L2-L3 in the starter be connected in the
A-B-C phase sequence to prevent equipment damage due to
reverse rotation.
• Check the condenser fans to be sure that they rotate freely in the fan
openings and that each is securely attached to its fan motor shaft.
• Energize the compressor sump heaters by closing the unit main discon-
nects. If unit-mounted disconnects are used, they must also be closed. If
Figure 32, are "OPEN" .
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