Start-Up and Shutdown
50
RTAF-SVX001A-EN
Seasonal Unit Start-Up Procedure
1.
Close all valves and re-install the drain plugs in the
evaporator.
2. Service the auxiliary equipment according to the start-
up/maintenance instructions provided by the
respective equipment manufacturers.
3. Close the vents in the evaporator chilled water circuits.
4. Open all the valves in the evaporator chilled water
circuits.
5. Open all refrigerant valves to verify they are in the
open condition.
6. 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.
7.
Check the adjustment and operation of each safety and
operating control.
8. Refer to the sequence for daily unit startup for the
remainder of the seasonal startup.
System Restart After Extended
Shutdown
Follow the procedures below to restart the unit after
extended shutdown:
1. Verify that the liquid line service valves, oil line,
compressor discharge service valves and suction
service valves are open (backseated).
2. Check the oil sump level.
3. 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.
4. Close the fused-disconnect switches that provides
power to the chilled water pump.
5. Start the evaporator water pump and, while water is
circulating, inspect all piping for leakage. Make any
necessary repairs before starting the unit.
6. While the water is circulating, adjust the water flows
and check the water pressure drops through the
evaporator. See
“Pressure Drop Curves,” p. 21
and
water flow rates in
“General Data,” p. 10
.
7.
Verify proper operation of flow switch on the
evaporator waterbox.
8. Stop the water pump. The unit is now ready for start-
up as described previously.
NOTICE:
Equipment Damage!
Ensure that the compressor and oil sump heaters have
been operating properly for a minimum of 24 hours
before starting. Failure to do so could result in
equipment damage.
NOTICE:
Compressor Damage!
Catastrophic damage to the compressor will occur if
the oil line shut off valve or the isolation valves are left
closed on unit start-up.
NOTICE:
Proper Water Treatment!
The use of untreated or improperly treated water in
this equipment 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.
