Duties are to install, test, modify, and repair a large central air conditioning and heating system providing a variety of functions such as: heating, cooling, humidifying, dehumidifying. and air and water circulation to approximately twenty-two (22) different buildings including a large administration Bldg., multi story patient care building, warehouse, large clinical laboratory, large research laboratories, data processing center, and two animal storage compounds.
The HVAC Equipment Mechanic installs, tests, modifies, and repairs large package systems ranging from 1 ton to 50 tons and larger, and special purpose HVAC and refrigeration systems and equipment which provide for specific and critical environmental conditions for areas, such as laboratories, animal research rooms, animal storage, and isolation facilities computer centers etc.
Installation, repair, maintenance, trouble-shooting, and modification of special purpose climate control systems located throughout the facility. The requirements for climate control constantly change in these areas, so the incumbent must be highly skilled in unique modifications to these systems, which provide special air flows, volumes, temperature, and pressures to critical and experimental areas.
The incumbent is required to maintain and repair air conditioning systems for all areas. Must understand pressure profiles and component pressure drops affecting the performance of a variety of air conditioning equipment, all types of air and ventilation systems (i.e. supply air, return air, exhaust, fresh air make-up, etc). Volume dampers and power operated dampers which are linked into controls and instrumentation which sense changes in critical test conditions or sensitive environments. Checks heating, cooling volume pressure functions and maximum/minimum flow rates for factory set air terminal units and makes modifications to components for specific environmental needs. Adjusts fan speeds to provide for specific design flows, makes pilot tube traverses of all trunk lines and major branches to assure proper proportion of air flow.
Provide complete HVAC controls and instrumentation including wiring and piping, thermometers, gauges, thermostatic controllers, motor controls, interlocks, P.E. and E.P. relay switches, control dampers, control valves and operators and duct work and modifies and adjusts those components and systems to meet specific environmental needs. Maintains zone damper motors, rods and linkage; also routinely check condensate drain piping; duct connections; repairs automatic rotary filter motors and controls.
Repair, modify, maintain, and troubleshoot Facility fume hoods and fume ventilation equipment as required. Maintains, modifies, repairs, and does preventive maintenance on all controls for large central A/C and heating systems, such as pneumatic, electric and electronic controls, and troubleshoots electronic control panels using voltmeter, amp probe, and digital meters. Incumbent tests and balances the water flow using appropriate instruments to calibrate the water flow.
Incumbent tests and balances the air flow by using a velometers air velocities and air streams by using anemometers and air temperature, velocity and static pressure by using air meter.
Incumbent works on a wide variety of air conditioning and refrigeration i.e. split systems, roof top systems, multiple evaporator systems, air cooled condensing units, water cooled condensing systems, shell and coil condensing systems, tube and shell condensing systems, cooling towers, walk-in freezers, expendable refrigerant systems using liquid nitrogen multistage systems where ultra-low temperatures are desired, evaporative condensing systems etc. Work includes installing, troubleshooting, determining cause of malfunctioning equipment, repairing and implementing equipment changes.
The incumbent will receive many project and work assignments with minimum instructions concerning the method by which the work is to be accomplished or the materials which are to be used to complete the assigned task.
Incumbent works from mechanical drawings, schematics and published manufacturer specifications and manuals, and must be able to make judgments and decisions about assigned work. The HVAC Mechanic should be able to plan and lay out a work plan that at the same time must be flexible enough to accommodate changes that may occur during the work and which require on-the-spot decision making.
Repair air compressors, dryers, pneumatic controls, water pumps, and all types of valves. Maintain and repair medical gas, medical air, oxygen, nitrous oxide, nitrogen, medical vacuum. Check out and troubleshoot medical air panels on wards, removing and replacing parts when necessary.
Skills and Knowledge
Incumbent must demonstrate a good knowledge of planning layouts and repair of a wide variety of types and models of systems.
Incumbent shall have knowledge of maintenance and repair of pneumatic control valves for both hot water and chilled water coils, and also possess knowledge of gate valves, strainers, float and thermostatic traps and check valves; control modulating or two position valves. Must have the knowledge of HVAC test instruments and tools. Sheet metal fabrication knowledge is desirable.
Incumbent must have knowledge of all types of condensers, both air cooled and water cooled, and readily be able to repair and perform maintenance to same. The incumbent must be skilled in the repair and operation of the steam heating system throughout the Facility. Incumbent must understand and implement use of safety methods and equipment in order to protect self, others and property from inflicting damage. Incumbent must have ability to read and work from mechanical drawings and technical handbooks in the course of his work.
Must extend moderate to arduous physical effort involving working, standing, bending, stooping, lifting, crawling and while working on hospital equipment, must be able to climb ladders and scaffolding. The incumbent must be able to lift loads up to 80 lbs.
Incumbent works around and with potentially hazardous mechanical and electrical equipment. Extreme care must be taken while working with drill presses, bench and surface grinders, mechanical and hydraulic shears and breaks, arc and acetylene welding equipment and sheet metal. Planning and care must be exercised during new installations, while working with heavy equipment piping and duct work on roofs and in sub-basements around the Facility. Incumbent works in close quarters and cramped positions during installation repair and servicing of hospital equipment.