CG-SVX17D-EN 141
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!
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 injuryInspect all wiring
connections to be sure they are clean and tight.
• Verify that all refrigerant valves 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 “OPEN” all
valves may cause serious compressor damage.
• Check the power supply voltage to the unit at the main power fused-disconnect switch. Voltage
must be within the voltage utilization range stamped on the unit nameplate. Voltage imbalance
must not exceed 2 percent. See
“Unit Voltage Imbalance,” p. 143.
• Check the unit power phasing to be sure that it has been installed in an “ABC” sequence. See
“Unit Voltage Phasing,” p. 143.
WARNING
Live Electrical Components!
During installation, testing, servicing and troubleshooting of this product, it may be necessary
to work with live electrical components. Have a qualified licensed electrician or other individual
who has been properly trained in handling live electrical components perform these tasks.
Failure to follow all electrical safety precautions when exposed to live electrical components
could result in death or serious injury.
• Verify that the compressor oil sump heaters are installed tightly around the compressor.
Energize and verify heaters are operational using a temperature probe. See
Ta b le 59, p. 141.
• Verify that the VSD blanket and optional pump VSD heaters are operational. See Ta b le 60,
p. 142. Install jumper across thermostat and verify each heater is functioning. See section “Unit
Wiring,” p. 183 for component locations.
Table 59. Compressor oil sump heater summary
(a)
(a) Not all heaters are present on all unit configurations. See schematics and component locations in
section“Unit Wiring,” p. 183.
Heater Group Heater Description
Heater
Designation(s)
Compressor Oil Sump
Compr 1A, Ckt 1 3M1E1
Compr 1B, Ckt 1 3M2E1
Compr 1C, Ckt 1 3M3E1
Compr 2A, Ckt 2 4M1E1
Compr 2B, Ckt 2 4M2E1
Compr 2C, Ckt 2 4M3E1
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