Trane RTHD - Manual (Page 5)

5 RLC-PRC020-EN
Features and
Benefits
State-of-the-Art, Precision Control
• Microprocessor-based CH530 controls
monitor and maintain optimal operation
of the chiller and its associated sensors,
actuators, relays, and switches, all of
which are factory-assembled and
extensively tested.
• Easy interface with computers hosting
Tracer Summit ™ building automation/
energy management systems allows
the operator to efficiently optimize
comfort system performance and
minimize operating costs.
• PID (proportional integral derivative)
control strategy ensures stable, efficient
chilled water temperature control,
maintaining +/- 1°F (0.56°C) control by
proactively reacting to instantaneous
load changes of up to 50 percent.
• Adaptive Control ™ attempts to maintain
chiller operation under adverse
conditions, when many other chillers
might simply shut down.
• Easy-to-use operator interface displays
all operating and safety messages, with
complete diagnostics information, on a
highly readable panel with a scrolling
touch-screen display.
• The RTHD features a complete range of
chiller safety controls.
• Over 120 diagnostic and operating
points are available, with standard
displays including chiller current draw,
condenser pressure, and evaporator
pressure.
Reliability and Ease of Maintenance
• Direct drive, low-speed compressor – a
simple design with only three moving
parts – provides maximum efficiency,
high reliability, and low maintenance
requirements.
• Electronic expansion valve, with fewer
moving parts than alternative valve
designs, offers highly reliable operation.
• Suction gas-cooled motor stays
uniformly cool at lower temperatures
for longer motor life.
• The Trane helical rotary compressor is a
proven design resulting from years of
research and thousands of test hours,
including extensive testing under
extraordinarily severe operating
conditions.
• Trane is the world’s largest
manufacturer of large helical rotary
compressors, with tens of thousands of
commercial and industrial installations
worldwide demonstrating a reliability
rate of greater than 99 percent in the
first year of operation.
Operating and Life Cycle
Cost-Effectiveness
• Electronic expansion valve enables
exceptionally tight temperature control
and extremely low superheat, resulting
in more efficient full-load and part-load
operation than previously available.
• Precise compressor rotor tip clearance
ensures optimal efficiency.
• Condenser and evaporator tubes use
the latest heat transfer technology for
increased efficiency.
• The RTHD includes standard electrical
demand limiting.
• Chilled water reset based on return
water temperature is standard.
• High compressor lift capabilities and
tight chilled water temperature control
allow highly efficient system design with
minimal operational concerns.
Design capabilities include:
• variable primary flow;
• series chiller arrangements for
evaporator and/or condenser;
• low evaporator and condenser flow.