Trane RTAC 140-500 ton units (60 Hz) User Manual
RTAC-SVX01F-EN
139
Pre-Start Checkout
•
If alarm and status relay outputs are used, install leads from the panel to the
proper terminals on circuit board.
proper terminals on circuit board.
•
If the emergency stop function is used, install low voltage leads to terminals on
circuit board.
circuit board.
•
Connect separate power for the External Emergency Stop option, if applicable.
•
If the ice making-option is used, install leads on 5K18 to the proper terminals on
1U7.
1U7.
•
Connect separate power supply for ice making status circuit, if applicable.
General
When installation is complete, but prior to putting the unit into service, the following
pre-start procedures must be reviewed and verified correct:
pre-start procedures must be reviewed and verified correct:
WARNING
Hazardous Voltage w/Capacitors!
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.
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
capacitors, see PROD-SVB06A-EN or PROD-SVB06A-FR
1.
Inspect all wiring connections in the compressor power circuits (disconnects, ter-
minal block, contactors, compressor junction box terminals, etc.). to be sure they
are clean and tight.
minal block, contactors, compressor junction box terminals, etc.). to be sure they
are clean and tight.
CAUTION
Connections!
Connections!
Verify all connections are made. Loose connections can cause
overheating and undervoltage conditions at the compressor motor.
overheating and undervoltage conditions at the compressor motor.
2.
Open all refrigerant valves in the discharge, liquid, suction, oil and oil return lines.
CAUTION
Compressor Damage!
Compressor Damage!
Catastrophic damage to the compressor will occur if the oil line shut off
valve or the isolation valves are left closed on unit start-up.
valve or the isolation valves are left closed on unit start-up.
3.
Check the power supply voltage to the unit at the main power fused-disconnect
switch. Voltage must be within the voltage utilization range and also stamped on
the unit nameplate. Voltage imbalance must not exceed 3%.
switch. Voltage must be within the voltage utilization range and also stamped on
the unit nameplate. Voltage imbalance must not exceed 3%.
4.
Check the unit power phasing L1-L2-L3 in the starter to be sure that it has been
installed in an “ABC” phase sequence.
installed in an “ABC” phase sequence.