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RLC-SVX09Q-EN
Operating Principles
This section contains an overview of the operation of
Series R
®
chillers equipped with microcomputer-based
control systems. It describes the overall operating
principles.
Note: For proper diagnosis and repair, contact a qualified
service organization if a problem should occur.
The units are dual-compressor, dual circuit, and water-
cooled liquid chillers. These units are equipped with unit-
mounted starter/control panels. The basic components of
the unit are:
• Unit-mounted panel containing starter and Symbio ™
800 controller and Input/Output LLIDS
• Helical-rotary compressors
• Evaporator
• Condenser
• Electronic expansion valves
• Water-cooled condenser with integral subcooler
• Oil supply system
• Oil cooler (application dependent)
• Related interconnecting piping
WARNING
Refrigerant under High Pressure!
Failure to follow instructions below could result in an
explosion which could result in death or serious
injury or equipment damage.
System contains oil and refrigerant under high
pressure. Recover refrigerant to relieve pressure
before opening the system. See unit nameplate for
refrigerant type. Do not use non-approved
refrigerants, refrigerant substitutes, or refrigerant
additives.
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.
Figure 27. RTWD components – front view
Control Panel
Compressor B
Condenser Circuit 2
Suction Service Valve
Evaporator
Circuit 2
Evaporator
Circuit 1
Evaporator ASME
Nameplate
Condenser
Circuit 1
Oil Separator
Circuit 1
Starter Panel
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