Under general supervision, installs, services, repairs, and operates a
variety of large, complex commercial and industrial heating,
ventilation and air conditioning (HVAC) systems, including large
regional heating and cooling facilities serving 10 -15 campus
buildings. Mechanics at this level are responsible for maintaining
all components, subcomponents, and aspects of HVAC equipment,
including reciprocating, screw, centrifugal and absorption chiller
plants. Mechanics at this level work on HVAC equipment ranging up to
the largest available from manufacturers in buildings ranging in size
up to 500,000 gross square feet (GSF).
1. Installs and repairs HVAC equipment such as centrifugal,
reciprocating, and screw compressors, hydronic pumps, natural and
propane gas burners, and central station air handler fans of
forward curve, vane axial and backward incline design.
2. Diagnoses, repairs and maintains low pressure steampiping
equipment, vessels and valves.
3. Installs, diagnoses, and repairs all facets of temperature
control systems to maximize system performance.
4. Diagnoses, repairs and maintains variable speed drive devices and
power electronic devices. Programs Direct Digital Controllers
5. Diagnoses airside and hydronic deficiencies from field
6. Performs indoor air quality (IAQ) analysis of facilities making
necessary modifications to correct deficiencies.
7. Supervises contractors and performs warranty notification for
assigned projects. Provides guidance and training in the HVAC
trade to other maintenance personnel.
8. May direct the work of other mechanics in the fabrication,
installation, testing and servicing of HVAC systems.
9. Performs all the duties of HVAC Mechanic II.
10. Interprets technical data, manufacturer and supplier information.
Recommends equipment selections. Develops analysis of system
operation based on mechanical drawings and specifications.
Note: The intent of this list of primary duties is to provide a
representative summary of the major duties and responsibilities of
this job. Incumbents perform other related duties assigned. Specific
duties and responsibilities may vary based upon departmental needs.
EDUCATION: High School Diploma or GED.
EXPERIENCE: Eight years progressively responsible experience in any
combination of air conditioning, refrigeration, temperature control,
steam distribution, or heating trades.
Comprehensive knowledge of the principles of air conditioning and
refrigeration; of the practices and techniques used in the
installation, repair and maintenance of HVAC equipment and systems; of
refrigerant types, environmental impact, and gas reclamation
procedures and equipment. Thorough knowledge of OSHA regulations
related to the refrigeration trade; of National Electric Code; of
basic mathematics including area, volume, and weights and the
practical application of fractions, percentages, ratios, and
proportions. Thorough knowledge of plumbing, steamfitting, and the
electrical trades as they pertain to HVAC systems. Skill in the
installation, repair and maintenance of commercial or industrial HVAC
equipment and systems; in the use and maintenance of tools and
equipment of the trade; in welding, brazing, soldering, and silfoss;
in reading and interpreting blueprints, schematics, drawings,
specifications, and contract documents; in the use of dial indicators,
vernier calipers, and depth micrometers; in using computers to
diagnose HVAC system problems. Ability to read and explain
manufacturer recommendations regarding scheduled and preventive
maintenance, servicing and operation; to prepare written reports; to
communicate effectively both orally and in writing; to provide
direction and training to mechanics and other maintenance personnel in
the HVAC trade; to program computers for HVAC system operations; to
estimate costs of installing HVAC systems up to 100 tons; to work in,
on, around, over and under fixed equipment and machinery; to work at
heights up to 35 feet; to manipulate heavy equipment, tools and
supplies and/or exert force up to 50 lbs.; to concurrently manipulate
multiple controls on machinery and equipment; to work in hazardous or
irritating environments, confined spaces, and adverse weather or
temperature conditions; to wear and work in personal protective
OTHER: Except for qualifications established by law, additional
related experience and formal education in which one has gained the
knowledge, skills, and abilities required for full performance of the
work of the job class may be substituted for the education or
experience requirement on a year-for-year basis with 30 college
credits being equivalent to one year of experience.
CONDITIONS OF EMPLOYMENT
Candidates selected for employment may be subject to medical inquiries
and/or medical examinations to determine ability to perform the job.
Employees assigned to work with CFC refrigerants must maintain valid
certification in accordance with federal law. Valid Maryland
Non-commercial Class C or equivalent driver's license may be required.
Candidates selected for employment may be required to be trained to
work with asbestos.