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AC-SVX003A-EN
NOTICE
Equipment Damage!
Failure to follow instructions could result in
equipment damage.
Lock the disconnect in the "OPEN" position to
prevent accidental start-up and damage to the system
when it has been shut down for extended periods.
6. At least every three months (quarterly), check the
refrigerant pressure in the unit to verify that the
refrigerant charge is intact.
Seasonal Unit Start-up
Procedure
1. PRIOR to water being pumped into system, use
gauges to verify positive pressure in the evaporator and
condenser. Lack of pressure could indicate a system
leak. When charging in the factory, approximately 95%
of the refrigerant charge is isolated in the evaporator,
and the other 5% is contained in the condenser and
compressor. In the event that no pressure is present,
contact local Trane service.
2. Close all drain valves and re-install the drain plugs in
the evaporator.
3. Service the auxiliary equipment according to the start-
up/maintenance instructions provided by the respective
equipment manufacturers.
4. Close the vents in the evaporator chilled water circuits.
5. Open all the valves in the evaporator chilled water
circuits.
6. Open all refrigerant valves or verify they are in the open
condition.
7. If the evaporator was previously drained, vent and fill
the evaporator and chilled water circuit. When all air is
removed from the system (including each pass), install
the vent plugs in the evaporator water boxes.
8. Check the adjustment and operation of each safety and
operating control.
9. Refer to the sequence for daily unit start-up for the
remainder of the seasonal start-up.
System Restart After Extended
Shutdown
NOTICE
Equipment Damage!
Failure to follow instructions could result in
equipment damage.
Ensure that the compressor and oil sump heaters
have been operating properly for a minimum of 24
hours before starting.
Follow the procedures below to restart the unit after
extended shutdown:
1. Check refrigerant pressure as noted in Seasonal Unit
Start-Up procedure.
2. Verify that the liquid line service valves, oil line,
compressor discharge service valves and suction
service valves are open (backseated).
NOTICE
Compressor Damage!
Failure to follow instructions below could cause
catastrophic damage to the compressor.
Do not leave oil line shut off valve or the isolation
valves closed on unit start-up.
3. Check the oil sump level. See instructions in
Maintenance chapter.
4. Fill the evaporator water circuit. Vent the system while it
is being filled. Open the vent on the top of the
evaporator and condenser while filling and close when
filling is completed.
NOTICE
Proper Water Treatment Required!
The use of untreated or improperly treated water
could result in scaling, erosion, corrosion, algae or
slime.
Use the services of a qualified water treatment
specialist 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.
5. Close the fused-disconnect switches that provides
power to the chilled water pump.
6. Start the evaporator water pump and, while water is
circulating, inspect all piping for leakage. Make any
necessary repairs before starting the unit.
7. While the water is circulating, adjust the water flows
and check the water pressure drops through the
evaporator. See Evaporator Waterside Pressure Drop
Curves in Installation Mechanical chapter, and water
flow rates in General Data tables.
8. Verify proper operation of flow switch on the evaporator
waterbox.
9. Stop the water pump. The unit is now ready for start-up
as described previously
Sequence of Operation
This section provides basic information on chiller operation
for common events. Adaptive control algorithms are used
on these chillers. This section illustrates common control
sequences.
Software Operation Overview
The following figure is a diagram of the five possible
software states. This diagram can be thought of as a state
Start-up and Shutdown
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