Trane CVGF1000, Инструкция по установке, эксплуатации и обслуживанию

Страница: 113 / 128

Unit Startup Unit Start-Up Procedures
Daily Unit Start-Up
1. Verify the chilled water pump and condenser water pump starter are in “ON” or
“AUTO.”
2. Verify the cooling tower is in “ON” or “AUTO.”
3. Check the oil tank oil level; the level must be visible in or above the lower sight
glass. Also be sure to check the oil tank temperature; normal oil tank temperature
before start-up is 140°F to 145°F (60° to 63°C).
Note: The oil heater is energized during the compressor off cycle. During unit opera-
tion, the oil tank heater is de-energized.
4. Check the chilled water setpoint and readjust it, if necessary, in the Chiller Settings
menu.
5. Check the current limit setpoint and readjust it, if necessary, in the chiller settings
menu.
6. Press <AUTO>.
Next, the AdaptiView checks the leaving evaporator water temperature and compares
it to the chilled water setpoint. If the difference between these values is less than the
start differential setpoint, cooling is not needed.
If the AdaptiView determines that the difference between the evaporator leaving water
temperature and chilled water setpoint exceeds the start differential setpoint, the unit
enters the initiate in the start mode, the oil pump and the condenser water pump are
started. If condenser water flow is not proven (flow switch 5S2 does not close) within
4 minutes 15 seconds, the unit is locked out on a MMR Diagnostic.
Oil pressure must be verified within 3 minutes or a MMR diagnostic is generated.
When less than 5 seconds remain on the restart inhibit, the pre-start test is conduct-
ed on Y-Delta starters. If faults are detected, the unit’s compressor will not start, and a
MMR Diagnostic will be generated.
Note: Whenever the AdaptiView detects a MMR diagnostic condition during start-up,
unit operation is locked out, and manual reset is required before the start-up sequence
can begin again. If the fault condition has not cleared, AdaptiView will not permit re-
start.
When the cooling requirement is satisfied, the AdaptiView originates a “Shutting
down” signal. The inlet guide vanes are driven closed for 50 seconds, and the unit en-
ters a 1 minute post-lube period. The compressor motor and condenser water pump
starter are de-energized immediately, but the oil pump continues to run during this 3
minute interval; the evaporator pump will continue to run. Once the post-lube cycle is
done, the unit returns to auto mode.
Seasonal Unit Start-Up
Note: The following procedure is a requirement prior to the first start of the chiller.
Failure to complete may result in damage to the compressor and void the war-
ranty.
1. Close all drain valves, and reinstall the drain plugs in the evaporator and condens-
er headers.
2. Service the auxiliary equipment according to the start-up and maintenance in-
structions provided by the respective equipment manufacturers.
3. Vent and fill the cooling tower, if used, as well as the condenser and piping. At this
CVGF-SVX03B-EN
113
Unit Startup