Trane R Series, Installation Operation & Maintenance

Page: 122 / 188

122 RLC-SVX07A-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 Figure 35 and 36 , are
“OPEN”
CAUTION
Compressor Damage!
Do not operate the unit with the compressor, oil discharge, liquid
line service valves and the manual shutoff on the refrigerant
supply to the auxiliary coolers “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
16 and also stamped on the unit nameplate. Voltage imbal-
ance must not exceed 2 percent. Refer to Paragraph "Unit Voltage Imbal-
ance" on Page 124 .
• Check the unit power phasing to be sure that it has been installed in an
“ABC” sequence. Refer to Paragraph
"Unit Voltage Phasing" on Page 124 .
WARNING
Prevent Injury!
It is imperative that Ll-L2-L3 in the starter be connected in the
A-B-C phase sequence to prevent equipment damage due to
reverse rotation.