RLC-SVX02G-E4
58
Pre-Start Checkout
General
When installation is complete, but
prior to putting the unit into service,
the following prestart procedures
must be reviewed and verified
correct:
Disconnect all electric power,
including remote disconnects,
before servicing. Failure to
disconnect power before servicing
can cause severe personal injury or
death.
1. Inspect all wiring connections in
the compressor power circuits
(disconnects, terminal block,
contactors, compressor junction
box terminals and so forth) to
ensure they are clean and tight.
Verify that all the connections are
tightly made. Loose connections
can cause overheating and
undervoltage conditions at the
compressor motor.
2. Open all refrigerant valves in the
discharge, liquid, oil, and oil
return lines.
Do not operate the unit with the
compressor, oil discharge, liquid-line
service valves, or the manual
shutoff on the refrigerant supply to
the auxiliary coolers "CLOSED."
Failure to have these “OPEN” may
cause serious compressor damage.
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%.
4. Check the unit power phasing L1-
L2-L3 in the starter to ensure that
it has been installed in an “A-B-C”
phase sequence.
Improper power phasing can result
in equipment damage due to
reverse rotation.
Do not use untreated or improperly-
treated water. Equipment damage
may occur.
5. Fill the evaporator chilled-water
circuit. Vent the system while it is
being filled. Open the vents on
the top of the evaporator water
box while filling and close when
filling is completed.
The use of improperly-treated or
untreated water in this equipment
may result in scaling, erosion,
corrosion, algae, or slime.The
services of a qualified water-
treatment specialist should be
engaged to determine what
treatment, if any, is advisable.Trane
warranty specifically excludes
liability of corrosion, erosion, or
deterioration of Trane equipment.
Trane assumes no responsibilities
for the results of the use of
untreated or improperly-treated
water, or saline or brackish water.
6. Close the fused-disconnect
switch(es) that supplies power to
the chilled-water pump starter.
7. Start the chilled-water pump to
begin circulation of the water.
Inspect all piping for leakage and
make any necessary repairs.
8 With water circulating through
the system, adjust the water flow
and check the water pressure
drop through the evaporator.
9. Adjust the chilled-water flow
switch for proper operation.
Use extreme caution when
performing the following procedure
with power applied. Failure to do so
can result in personal injury or
death.
10. Reapply power to complete the
procedures.
11. Prove all Interlock and
Interconnecting Wiring Interlock
and External as described in the
Electrical Installation section.
12. Check and set, as required, all
CH.530 menu items.
13. Stop the chilled-water pump.
14. Energize the compressor and oil
separators heaters 24 hours
prior to unit startup.
Unit Voltage Power Supply
Voltage to the unit must meet the
criteria given in the Installation-
Electrical Section. Measure each leg
of the supply voltage at the main
power fused-disconnect switch for
the unit. If the measured voltage on
any leg is not within the specified
range, notify the supplier of the
power and correct the situation
before operating the unit.
Provide adequate voltage to the
unit. Failure to do so can cause
control components to malfunction
and shorten the life of relay contact,
compressor motors and contactors.
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