ARTC-SVX007A-EN
53
Operator Tasks
Before operating the unit, ensure that all compressor
refrigeration service valves are fully back-seated
counterclockwise and all valves are in the open position.
Normal Power Up
The following procedure is used for a startup resulting from
scheduled seasonal or programmed cold shutdown of the
chiller.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
Important: This start-up procedure is not to be used for the
first-time initial startup for a newly installed chiller.
1. De-energize the chiller using standard lockout/tagout
procedures.
2. Using a known operational voltage meter, test and
confirm the chiller is de-energized before proceeding
further.
3. Inspect power distribution fuses and overload settings
to verify they are correct.
4. Restore power to all modules.
5. Inspect refrigerant pressures for each module using the
touchscreen interface panel.
6. Verify pressures correlate using manifold gauges.
7. Verify chilled water flow to condenser and evaporator.
8. Monitor and record temperature and refrigerant
pressures registering on the touchscreen interface
panel.
Emergency Power Shutdown
The chiller includes a disconnect to turn off the high voltage
to the modules. Should an emergency condition arise, the
disconnect must be opened to shutdown all voltage to the
chiller.
There are several ways to interrupt power to all or part of
the chiller:
• Disconnect the primary power source from the building
that feeds electricity to the chiller. This occurs in
sudden emergencies (usually weather-related) or
planned maintenance shutdowns.
• Press the HOA button to access the OFF button. Press
the OFF button to disable the module. The HOA button
is located on the touchscreen of each module.
• Each module has a toggle switch located on the
exterior of the power panel. This switch is used to
isolate power in the control panel.
Note: Pressing the HOA button on the touchscreen
interface panel does not de-energize the chiller or
the high voltage current into each module’s control
panel. This action sends a command to the
controller in each module’s compressors to
discontinue electrical current to that component.
Water Quality Guidelines
Water quality must be maintained periodically by the end
user to avoid scaling and corrosion inside the heat
exchangers.
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.
Table 16. Water quality guidelines
Element/Compound/Property
Value/Unit
pH
7.5 - 9.0
Conductivity < 500 μS/cm
Total Hardness 4.5 - 8.5 dH°
Operating Procedures
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