HVAC Technician Short-Term ; STH

DESCRIPTION

Under the direction of the Maintenance Supervisor performs skilled mechanical maintenance duties in the construction, diagnosis, repair, installation and alteration of District heating, ventilation, air conditioning and refrigeration systems and related equipment and facilities; performs preventive maintenance and routine servicing of equipment to assure efficient operation. Performs other related duties as may be assigned.

• Repairs/rebuilds mechanical drive systems to include but not limited to replacement of drive bearings, shafting, blower wheel assemblies, multi‑pulley and belt drives, and exhaust blower assemblies and motors for HVAC equipment. (E)
• Maintains and repairs hot and cold water pumping systems including motor replacement, bearing and shaft seal replacement, mounting and alignment techniques for proper operation, replacement of rubber and chain drive couplings; repair and rebuild triple duty valve, Y‑strainer assemblies; check valves, air and sludge separators, air bleeds and water treatment, air scavenging and sludge removal. (E)
• Maintains and repairs cooling tower, evaporator condenser and air‑cooled condenser; maintains, repairs, and replaces fill elements, water distributor, filter screening, piping, electrical components and control operation. (E)
• Maintains hot water boiler operation including electronic and mechanical safeties, primary and secondary pump systems and boiler ignition controls, chilled water systems operations, water flow dynamics, piping‑pumping configurations. (E)
• Maintains and repairs gas‑fired furnaces, infrared heaters, hydronic systems including safeties. (E)
• Maintains and repairs electronic and electrical sequencing and controls. (E)
• Installs and replaces condensers, evaporators, compressors, pumps, air handlers specifying equipment. (E)
• Diagnoses, removes, replaces, field services variable frequency drives. (E)
• Interprets blueprints and provides recommendations on equipment for mechanical engineers, works with contractors, architects, and distributors.
• Determines and recommends equipment manufacturers to engineers. (E)
• Evaluates equipment and recommends replacement equipment as needed.
• Communicates with administrators, skilled maintenance personnel, contractors and others concerning construction, maintenance and repair issues.
• Trains, assigns, and reviews the work of student workers, summer helpers or other maintenance personnel as assigned; assists other skilled maintenance personnel as required.
• Performs other related duties as may be assigned.

EDUCATION AND EXPERIENCE
:
Any combination equivalent to: graduation from high school supplemented by completion of an HVAC apprenticeship program and three years of journey‑level operation, maintenance and repair experience in the commercial HVAC and refrigeration trade.

• Valid California driver's license.
• Incumbents must qualify for a valid Forklift Certificate within the first year in this classification.
• Valid EPA Retrieval and Reclamation Certification issued by an authorized agency.

• Standard practices of the HVAC and refrigeration trade.
• Theory of HVAC and refrigeration systems.
• Materials, methods and tools used in the operation and repair of HVAC and refrigeration systems.
• Applicable building codes, ordinances and regulations of State and local authorities pertaining to HVAC, refrigeration and boilers.
• Air compressors and pneumatic controls.
• Principles and practices of Direct Digital Control Electronics related to HVAC equipment operation.
• Cooling tower and boiler water treatment.
• Manual and electrical tools and equipment applicable to the HVAC and refrigeration trade.
• Welding and soldering techniques.
• Health and safety regulations.
• Basic record‑keeping techniques.
• Proper methods of storing equipment, materials and supplies.
• Computer operation and related software applications.

• Perform skilled mechanical maintenance duties in the inspection, repair, installation and alteration of District heating, ventilation, air conditioning and refrigeration systems and related equipment and facilities.
• Calibrate systems.
• Per…