Installation, Operation and Maintenance 4 - 1
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This section contains an overview of the operation
and maintenance of Series R chillers equipped with
microcomputer-based control systems. It describes
the overall operating principles of the Series R
design.
Following the section is information regarding
specific operating instructions, detailed descriptions
of the unit controls and options (section 5), and
maintenance procedures that must be performed
regularly to keep the unit in top condition (sections 8,
9). Diagnostic information (section 10) is provided to
allow the operator to identify system malfunctions.
NOTE: To ensure proper diagnosis and repair,
contact a qualified service organization if a problem
should occur.
General
The Model RTHC units are single-compressor,
helical-rotary type water-cooled liquid chillers. These
units are equipped with unit-mounted starter/control
panels.
The basic components of an RTHC unit are:
q Unit-mounted panel containing starter and UCP2
microprocessor
q helical-rotary compressor
q evaporator
q electronic expansion valve and liquid-vapor
separator
q water-cooled condenser with integral subcooler
q oil supply system
q oil cooler (application dependent)
q related interconnecting piping.
Components of a typical RTHC unit are identified in
Figure 24
.
Figure 24
RTHC - Basic Unit Components
Evaporator
Compressor
Condenser
Oil Supply System
Panel
Starter/Control
Liquid Vapor
Separator
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