HVAC

HVAC

Minimum Requirements Requires a high school diploma or its equivalent and at least 4 years of experience in the field. Familiar with a variety of the field s concepts practices and procedures. Relies on experience and judgment to plan and accomplish goals. Performs a variety of complicated tasks. May report directly to a supervisor or manager. A wide degree of creativity and latitude is expected. Experience Requirements The work requires knowledge of complex heating systems steam production and distribution systems and the systems that supply steam to propel turbines and generators that provide power. Must be able to trace and locate equipment failure and perform complex repairs on large expensive components and equipment. Must have a thorough knowledge of refrigeration and air conditioning practices including understanding pneumatic electronic and electrical control circuits. Must have full working knowledge of various types of ventilating systems including steam electrical gas and oil-fired types. Read blueprints specifications or sketches. Solves problems using arithmetic or practical mathematics. Uses test instruments related to the trade. Must be familiar with refrigerant liquids their characteristic proper operating pressures and temperatures at either saturated for super-heated conditions and safe handling. Must know brazing and soldering techniques. Must be able to operate assigned motor vehicle on the job (pick-up truck). Must have knowledge of environmental laws and regulations and must be certified on Freon recovery equipment. The work requires refrigeration cycle knowledge in order to diagnose a variety of large complex commercial and industrial air-conditioning systems and to make extensive repairs quickly so that inoperative time can be kept to a minimum. Must be able to repair or build major units (e.g. pumps impellers compressors chillers evaporators etc.) and place them back in the system and fine tune the components to achieve the proper balance. Must have the ability to interpret and apply building plans blueprints diagrams and engineering drawings and uses formulas. Must have skills in the use of hand tools and a wide variety of trade equipment. Major Duties The HVACCS works from ladders scaffolding and platforms and where parts of the systems worked on are hard to reach places. The works requires considerable standing climbing stooping bending stretching and working in cramped awkward positions. Frequently lists carries and set up items weighting up to 50 pounds. Occasionally may lifts items weighting over 50 pounds with assistance or use of materials handling equipment. The HVACCS shall receive assignments in the form of work orders oral instructions or follows established maintenance schedules which identify the equipment to be repaired and the nature of work to be accomplished to install operate inspect maintain and repairs heating ventilating air-conditioning and refrigeration systems station wide. Systems include a central steam distribution system diesel natural gas propane and kerosene fired space heating systems general and special purpose air conditioning systems ice machines refrigerators and freezers (household type and commercial walk-in) display cases water coolers ice cream cabinets beverage dispensers beer coolers salad bars. HVACCS perform full range of work involved in the repair overhaul maintenance and servicing of industrial and domestic reach-in and walk-in refrigerators air-conditioning units and systems ventilating systems freezers water coolers dehumidifiers and related equipment and cold storage and cold room equipment. Diagnose and locate malfunctions. Check heating ventilating refrigeration and air conditioning systems ensure that systems are operating properly. Read and calibrate gauges thermostats and thermometers. Check expansion coils for excessive ice formation listens for unusual noises. Check oil refrigerant level in systems and checks piping and fittings for refrigerant leaks. Check air filters for cleanliness operation of fans dampers louvers and control of air movement. Test and treat water in closed heating and cooling systems and water-cooled condensers to control deposit of soil and algae. Install maintain replace and or adjust as necessary compressors pumps blowers fans copper tubing heat exchange equipment various types of valves filters and dryers pressures control devices temperature humidity and air control devices of both electrical and pneumatic types. Repair troubleshoots and install large complicated heating units and systems including oil and gas fired low and higher-pressure boilers steam production and distribution plans and turbine and generator power plants. These heating and power units include a variety of complex auxiliary components automatic controls circulating systems super-heaters preheaters economizers etc. installs new heating plants boilers furnaces piping pumps and controls and connects new equipment to existing facilities. Install maintain and repair steam traps pressure reducing valves temperature controlling valves heat exchangers steam heating systems. Secure and connect to piping systems steam fuel and fixtures such as radiation oil or natural gas fired heating units and heaters risers flexible branches expansion joints pressure regulators pumps and control valves. Joins seals and tests systems and equipment for proper pressure and leak free joints. Calibrates and repairs pneumatic control systems related to steam or hot water heating systems. Cleans and repairs heating exchangers and heating coils. Operations The HVACCS shall work alone or with other workers to perform simple or complex tasks while following appropriate and safe procedures. Responsible for reporting to supervisor all discrepancies or unsatisfactory performance of equipment as well as unsafe conditions. Must be familiar and comply with all safety regulations. Must wear appropriate safety equipment. Visual and sensory perception along with hand-eye coordination is required to operate equipment detect deficiencies and make repairs diagnose problems and make installment of devices equipment parts etc. The HVACCS shall have a good familiarity of NAVFAC SW Safety and Health Requirement manual instructions agency equipment regulations and directives. Guidelines will include a variety of Federal Department of Defense and Department of Navy Commander Naval Facilities Engineering Command Southwest publications manuals directives standards policies and procedures. Published guidance will be provided by the Government as needed.