HVAC Mechanic

Heating, Ventilation & Air-Conditioning Mechanic

Huntsville, AL

The Heating, Ventilation & Air-Conditioning Mechanic maintains, and repairs refrigeration, air conditioning, and water cooling equipment, boilers, HVAC, and associated physical plant equipment. The Heating, Ventilation & Air-Conditioning Mechanic inspects, repairs, replaces, and performs maintenance on HVAC systems to ensure they remain in a fully operational condition. Installs services and repairs environmental-control systems in office buildings and other commercial establishments, utilizing knowledge of refrigeration theory, pipe fitting, and structural layout.

• Provide all maintenance and repair of all heating, ventilating, air conditioning systems, and related energy management systems.
• Operate, maintain, and repair air compressors, together with distribution lines and all valves and devices for air control.
• Operate, maintain, and repair pumps, handling brines, or other secondary refrigerating liquids, together with all valves, appurtenances, and lines used in the system.
• Maintain proper operation during seasonal changes and recalibrate controls based on seasonal conditions to ensure energy-efficient operation.
• Operate, maintain, and repair heating systems, and boiler control systems to meet manufacturer's specifications.
• Diagnose repair needs and perform corrective measures to include mechanical, plumbing, and electrical functions.
• Maintain records for equipment and daily logs.
• Perform preventive maintenance, diagnosis, and repair on conventional air conditioning systems, freezers, refrigeration, and associated physical plant equipment.
• Maintain, repair, and replace thermostatic expansion and pressure-limited devices and valves, motors, compressors, starters, thermostats, piping, coils boiler burners, and other assorted HVAC system controls and components.
• Trace electrical circuits, installs and repairs time clocks and regulatory controls, and makes minor repairs to electrical circuit breakers and motor controls.
• Perform related work assigned or required, such as balancing capacities and loads of refrigeration and air conditioning equipment; laying out and/or making estimates for repairs and new installations; ordering parts and equipment.
• Maintain building temperature during occupied hours to comply with ASHRAE Standard 55-2013, Thermal Environmental Conditions for Human Occupancy.
• Adjust cooling, heating, reheating, preheating, and humidity to control environmental conditions required by the equipment served by these systems.
• Maintain, diagnose, test, overhaul, install, and repair a variety of refrigeration, dehumidification, AC, ventilation, and heating systems.
• Mount compressor and condenser units on platform or floor, using hand tools, following blueprints or engineering specifications.
• Fabricate, assemble, and install ductwork and chassis parts, using portable metalworking tools and welding equipment.
• Replace filters, belts, and adjusts temperatures for environmental control.
• Install evaporator unit in chassis or in air duct system, using hand tools.
• Cut and bend tubing to correct length and shape, using cutting and bending equipment and tools.
• Cut and thread pipe, using machine or hand threading equipment.
• Join tubing or pipes to various refrigerating units by means of sleeves, couplings or unions, and solders joints, using torch, forming complete circuit for refrigerant.
• Install expansion and discharge valves in circuit. Connect motors, compressors, temperature / humidity controls, and circulating ventilation fans to control panels and connect control panels to power source.
• Install air and water filters in completed installations.
• Test joints and connections for gas leaks, using leak testers and soap solution.
• Wrap pipes in insulation and secures them in place.
• Replace defective breaker controls, thermostats, switches, fuses and electrical wiring to repair installed units, using electrician's hand tools and test equipment.
• Observe pressure and vacuum gauges and adjust controls to ensure proper operation.
• Wear and use all required personal protective equipment (PPE), such as safety glasses, safety shoes, ear plugs, hardhat,…