Pre-Start Checkout - Trane CGAM Installation & Operation Manual

Pre-Start Checkout

When installation is complete, but prior to putting 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 injury.
• Verify that all refrigerant valves are "OPEN"
NOTICE:
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.
• Check the unit power phasing to be sure that it has
been installed in an "ABC" sequence. See
Voltage Phasing, " p. 122.
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 Table 68, p.
Table 68. Compressor oil sump heater summary
Heater Grp Heater Description
Compr 1A, Ckt 1
Compr 1B, Ckt 1
Compr 1C, Ckt 1
Compressor
Oil Sump
Compr 2A, Ckt 2
Compr 2B, Ckt 2
Compr 2C, Ckt 2
(a) Not all heaters are present on all unit configurations. See schematics and
component locations in section"Unit Wiring," p.
CG-SVX17E-EN
122.
"Unit
121.
(a)
Heater Designation(s)
3M1E1
3M2E1
3M3E1
4M1E1
4M2E1
4M3E1
151.
• Verify that the VSD blanket and optional pump VSD
heaters are operational. See
jumper across thermostat and verify each heater is
functioning. See section
component locations.
Table 69. Operational heater summary
Thermo-
Heater stat Jumper
Group Designation Terminals
VSD 1X4-1 to
1S2
Blanket 1X4-25
Pump VSD
5X4-1 to
Enclosure 5S4
Wire 632
(optional)
• Fill the evaporator chilled water circuit.Vent the system
while it is being filled. Open the vents on the top of the
evaporator during filling and close when filling is
completed.
NOTICE:
Proper Water Treatment!
The use of untreated or improperly treated water could
result in scaling, erosion, corrosion, algae or slime. It is
recommended that the services of a qualified water
treatment specialist be engaged to determine what
water treatment, if any, is required. Trane assumes no
responsibility for equipment failures which result from
untreated or improperly treated water, or saline or
brackish water.
• Close the fused-disconnect switch(es) that supplies
power to the chilled water pump starter.
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.
• Start the chilled water pump to begin circulation of the
water. Inspect all piping for leakage and make any
necessary repairs.
• With water circulating through the system, adjust
water flow and check water pressure drop through the
evaporator.
• Prove all Interlock and InterconnectingWiring Interlock
and External.
• Check and set, as required, all CH530 Menu Items.
• Stop the chilled water pump.
Table 69, p. 121. Install
"Unit Wiring, " p. 151 for
Heater Heater
Description Designation
Blanket, 1A36 1E1, 1E2
Blanket, 1A37 1E3
Pump VSD
5E9
Enclosure
121