This manual was written to provide the service technician with the procedures
necessary to bring heating, air conditioning, and refrigeration systems,
including heat pumps, to full operating efficiency. This manual was
not intended to present “standard” service procedures but rather to provide
advanced information and procedures that, when followed, cause the
equipment to operate as it was designed by the manufacturer.
When used properly, the procedures presented in this manual will ensure
that the equipment operates more economically and to full capacity and
has a longer life with a minimum amount of repairs.
It would have been impossible to produce this manual without the help
of many manufacturers and friends who are concerned with this industry.
Their contributions over the past 35 years have made a manual of this
type possible. They have been most helpful in providing information
that, in part, made this text feasible. My sincere appreciation goes to all
those companies and individuals who value this industry as much as I
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