50
HDWA-SVX002C-EN
seconds while the compressor coasts to a stop. When line
power fails, power is supplied to the UPS with an internal
battery.
When power is removed, or if the chiller’s disconnect
switch is turned off, the UPS will supply power to the
Symbio™ 800 controls for 90 seconds and then the UPS
will de-activate. The UPS’s internal battery is not
completely discharged so that when power is restored, the
battery can provide enough power for additional
shutdowns.
The UPS has a fault indicator that is wired to a Symbio™
800 controls Low Level Intelligent Device (LLID; 1K3). If the
UPS indicates a fault, an immediate shutdown diagnostic
will be announced on the Symbio™ 800 controls.
The following UPS issues could cause this diagnostic:
• Clary (first generation UPS)
– EPO Protection
– Busbar Voltage Fault
– IGBT Over-Temperature
– Fan Fault
– Battery Fault
– Output Fault
– Multiple Inverting Fault
• N1C (second generation UPS)
– Emergency Protection
– Busbar Voltage Fault
– Over-Temperature
– Output Fault
– Output Overload
– Fan Fault
– Battery Fault
– Battery Voltage Too High
– Low Battery
Evaporator and Condenser
Heat exchangers are shell and tube design. Standard
tubes are externally finned, internally enhanced seamless
copper with lands at all tube sheets. All tube sheets are
made of carbon steel. Tubes are mechanically expanded
into tube sheets and mechanically fastened to tube
supports. Evaporator and condenser tubes are 0.75-in.
(19.05-mm) diameter. All tubes can be individually
replaced.
Shells are carbon steel plate. The evaporator is designed,
tested, and stamped in accordance with ASME Code for
refrigerant-side/working-side pressure of 200 psig (1379.0
kPaG). The condenser is designed, tested, and stamped in
accordance with ASME Code for refrigerant-side/ working-
side pressure of 300 psig (2068.4 kPaG).
All water pass arrangements are available with grooved
connections (150 psig [1034.2 kPaG] waterside working
pressure). All connections may be either right- or left-
handed. Waterside shall be hydrostatically tested at 1.5X
design working pressure.
Drive Cooling System
The drive cooling system rejects heat through a hybrid air
and fluid heat sink. The Adaptive Frequency™ Drive(AFD)
controls the fan speed to reject some of the heat while the
refrigerant expansion valve modulates to maintain a fluid
supply temperature to reject the remaining heat.
Drive cooling circuit includes a wet rotor circulation pump
that circulates a secondary heat transfer fluid in a closed
system through the AFD heat sinks, output load inductor
and a brazed plate heat exchanger. The pump is fed from a
thermal expansion tank with a vented-pressure cap which
is also used as the circuit pressure relief. The circuit also
includes a particulate strainer and a drain valve for
servicing.
Tracer
®
AdaptiView™ Display
Information is tailored to operators, service technicians,
and owners.
When operating a chiller, specific information is needed
you needed on a day-to-day basis—setpoints, limits,
diagnostic information, and reports.
Day-to-day operational information is presented at the
display. Logically organized groups of information—chiller
modes of operation, active diagnostics, settings, graphs,
and reports put information conveniently at your fingertips.
For more information, refer to Tracer
®
AdaptiView™
Display for Water-cooled Agility Chillers Operations Guide
(HDWA-SVU001*-EN).
Operating Principles
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