70 RT-SVX34C-EN
Startup
Preparing the Unit for Operation
Use the checklist provided below in conjunction with the "Installation Checklist” to ensure that the
unit is properly installed and ready for operation.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
• Check all electrical connections for tightness and "point of termination" accuracy.
• Verify that the condenser airflow will be unobstructed.
• Check the compressor crankcase oil level. Oil should be visible in the compressor oil sight glass.
The oil level may be above the sight glass prior to the initial start. Use appropriate lighting
(flashlight) to verify the presence of oil.
• Prior to unit startup allow the crankcase heater to operate a minimum of 8 hours to remove
liquid refrigerant from the compressor sump.
• Optional Service Valves - Verify that the discharge service valve, suction service valve, and
liquid line service valve is fully open on each circuit.
• Check the supply fan belts for proper tension and the fan bearings for sufficient lubrication. If
the belts require adjustment, or if the bearings need lubricating, refer to the Maintenance
section of this manual for instructions.
• Inspect the interior of the unit for tools and debris and install all panels in preparation for
starting the unit.
Electrical Phasing
Unlike traditional reciprocating compressors, scroll compressors are phase sensitive. Proper
phasing of the electrical supply to the unit is critical for proper operation and reliability.
The compressor motor is internally connected for clockwise rotation with the incoming power
supply phased as A, B, C. Proper electrical supply phasing can be quickly determined and corrected
before starting the unit by using an instrument such as an Ideal - Sperry 61-520 Phase Sequence
Indicator and following the steps below:
• Open the disconnect switch or circuit protector switch that provides the supply power to the
unit's power terminal block or to the unit mounted disconnect switch.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
• To be consistent with the compressor leads, connect the phase sequence indicator leads to the
terminal block or unit mounted disconnect switch as follows;
Table 26. Phase Sequence Leads
Phase Sequence Leads Unit Power Terminal
Red (phase A) L1
Blue (phase B) L2
Black (Phase C) L3
To Next Page
Loading...
