MAINTENANCE WORKER

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The primary purpose of this position is to This is a developmental position leading to HVAC/R, WG-4749-10, SCPD 9W077, performing work in the installation, maintenance, repair, and modification of large/complex heating, ventilation, air conditioning, and refrigeration (HVAC/R) systems and support equipment. • Receives developmental assignments in reading blueprints, sketches, drawings, specifications, work orders, and in planning and laying out work. • Assists higher grade worker in troubleshooting HVAC/R systems with complex problems and extensive repairs requiring judgment to locate malfunctions. • Repairs and maintains a variety of domestic and commercial refrigeration and air conditioning units and systems and receives developmental assignments working with large commercial and industrial ventilation, refrigeration, air conditioning (AC), and cooling systems with complex problems and extensive repairs. Installs, repairs, and maintains a variety of uncomplicated heating equipment and systems, and receives developmental assignments working with complex heating boilers and/or heating systems, single and multiple fuel power boilers, and associated auxiliary and pollution control equipment. • Under guidance from higher grade mechanic performs basic electrical work incidental to the maintenance and operation of HVAC/R systems. Receives training/developmental assignments in performing preventive maintenance on HVAC/R systems and equipment. • Utilizes safety practices and procedures following established safety rules and regulations and maintains a safe and clean work environment. In order to qualify, you must meet the quality level of experience requirements described in the Office of Personnel Management (OPM) Qualification Standards Handbook X-118C. QUALIFICATIONS: Applicants will be rated in accordance with the OPM Qualification Standard Handbook X-118C for the WG-4700 General Maintenance & Operations Work Group. Although a specific length of time and experience is not required for most blue-collar positions, you must meet any screen-out element listed, and show through experience and training that you possess the quality level of knowledge and skill necessary to perform the duties of the position at the level for which you are applying. Qualification requirements emphasis is on the quality of experience, not necessarily the length of time. The screen out element for this position is ability to do the work of a WG-4749 MAINTENANCE WORKER without more than normal supervision. JOB ELEMENTS: Your qualifications will be evaluated on the basis of your level of knowledge, skills, abilities and/or competencies in the following areas: 1. Knowledge of the standard methods of combustion, heat transfer principles, and fuel characteristics to install, repair, and maintain heating boilers and domestic heating units and systems; and refrigeration principles, including the refrigeration cycle, temperature measurement, and the properties of several refrigerants. 2. Knowledge of safety regulations, practices, and procedures; and regulations, procedures, and policies related to records maintenance and documentation. 3. Skill in performing routine maintenance on small electric motors, feed pumps, and valves, including replacing brushes, seals, bearings, and repacking valves; servicing power sources and replacing items such as belts, fans, and fuses; installing, aligning, adjusting, and repairing oil, gas, and coal burners and other burning mechanisms as well as heating boiler components; and making repairs on refrigeration and air conditioning units and systems, including replacing major portions of assigned systems. 4. Skill in the use of hand tools, power tools, precision measuring devices, and a variety of test equipment. 5. Skill in reading and applying work orders, blueprints, sketches, and other oral and written instructions. 6. Ability to learn basic electronics to locate faults in temperature controls and control devices, such as damper motors, mixing valves, and modulating motors; and use shop mathematics to compute fuel consumption rates, heat generating units, and air-to-fuel ratios and conversions. Physical Effort The employee lifts, carries, and handles equipment up to 50 pounds unassisted and over 50 pounds with assistance. Works from ladders, scaffolding platforms, or cramped areas where equipment, parts, or tools are hard to reach. Work requires frequent stooping, stretching, bending, kneeling, and working in tiring, uncomfortable positions for long periods. In addition, work involves frequent movement and maneuvering of large, heavy equipment using hoists, holders, and pulleys as required. Working Conditions The employee works indoors and outdoors, on elevated structures, and in cramped areas. Subject to discomfort from face masks or other protective devices when there is a possibility of exposure to chemicals, heat, steam, noise, noxious gases, fumes, or acids. Occasionally works outside, on top of buildings, in drafty attic spaces, and in cramped areas with low overheads. Subject to possible burns, electrical shocks, cuts, strains, bruises, and chemical irritations. To reduce dangers from these and other similar conditions, follows prescribed safety practices and uses safety equipment such as safety glasses, hard-toe shoes, respirators, hard hats, and fire retardant gloves. PART-TIME OR UNPAID EXPERIENCE: Credit will be given for appropriate unpaid and or part-time work. You must clearly identify the duties and responsibilities in each position held and the total number of hours per week. VOLUNTEER WORK EXPERIENCE: Refers to paid and unpaid experience, including volunteer work done through National Service Programs (i.e., Peace Corps, AmeriCorps) and other organizations (e.g., professional; philanthropic; religious; spiritual; community; student and social). Volunteer work helps build critical competencies, knowledge and skills that can provide valuable training and experience that translates directly to paid employment.You will receive credit for all qualifying experience, including volunteer experience.