HVAC Mechanic

Summary/General Description Of Job:

The HVAC/R Mechanic installs, services and repairs heating and air conditioning systems in various establishments.

Essential Duties & Job Functions:

§  Installs, services and repairs environmental‑control systems in residences, laboratory spaces, living quarters, galleys, office buildings and commercial establishments, utilizing knowledge of refrigeration theory, pipefitting and structural layout.

§  Mounts compressor and condenser units on platform or floor, using hand tools, following blueprints or engineering specifications.

§  Fabricates, assembles and installs ductwork and chassis parts, using portable metalworking tools and welding equipment.

§  Installs evaporator unit in chassis or in airduct system, using hand tools.

§  Cuts and bends tubing to correct length and shape, using cutting and bending equipment and tools.

§  Cuts and threads pipes, using machine‑threading or hand‑threading equipment.

§  Joins tubing or pipes to various refrigerating units by means of sleeves, couplings or unions, and solders joints, using torch, forming complete circuit for refrigerant.

§  Installs expansion and discharge valves in circuit.

§  Connects motors, compressors, temperature control panels and connects control panels to power source.

§  Installs air and water filters in completed installation.

§  Injects small amount of refrigerant into compressor to test systems and adds refrigerant gas to build up prescribed operating pressure.

§  Observes pressure and vacuum gauges and adjusts controls to insure proper operation.

§  Starts units and adjusts for proper cut-in and cut-out of refrigeration, air conditioning, humidifiers, heaters, air cleaners, and circulating pumps.

§  Adjusts systems for optimum performance.

§  Operates, maintains, troubleshoots, and repairs refrigeration, air conditioning, gas and hydronic heating, DDS systems through periodic maintenance checking, and from trouble desk reports.

§  Tests joints and connections for gas leaks, using gauges or electronic detection.

§  Wraps pipes in insulation batting and secures them in place with cement or wire bands.

§  Replaces defective breaker controls, thermostats, switches, fuses and electrical wiring to repair installed units, using electrician's hand tools and test equipment.

§  May install, repair and service air conditioners, ranging from one quarter to three hundred- and eighty-five-tons cooling capacity, in large and small buildings.

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