HVAC Preventative Maintenance Mechanic

Chenega Corporation•Fort Hood, TX

About The Position

The HVAC Preventative Maintenance Mechanic maintains, repairs, and services refrigeration, air conditioning, water-cooling, boiler, HVAC, and associated physical plant equipment. The mechanic inspects, repairs, replaces, and performs maintenance on HVAC systems to keep them fully operational. The position installs, services, and repairs environmental-control systems in office buildings and other commercial establishments, applying knowledge of refrigeration theory, pipefitting, and structural layout. The role also supports HVAC filter supply planning through supply analysis using GFEBS Master Data, including validating data, evaluating filter consumption and run rates, identifying annual and periodic requirements, and preparing forecasts and consumption reports. The mechanic maintains equipment records and daily logs, completes work orders, supports refrigerant-management planning, and follows the project Safety Plan and applicable PPE requirements.

Requirements

High school diploma or GED.
At least four years of field experience maintaining commercial or industrial HVAC systems and components in support of an industrial preventive maintenance program.
EPA CFC certification (Type I and Type II, or Universal), maintained in accordance with Section 608 of the Clean Air Act.
Valid driver's license, which must be maintained.
Experience with related shop mathematics and interpreting and applying building plans, specifications, schematics, diagrams, blueprints, and sketches.
Knowledge of fan coil unit construction and operating characteristics, and limited knowledge of dual-temperature water heating and air-conditioning systems.
Ability to identify when fan coil unit mechanical, electrical, and structural components require repair or replacement; disassemble units, locate defects, and make repairs.
Ability to separate soldered joints during disassembly and solder pipes after cleaning or replacing coils.
Ability to follow electrical diagrams and connect wires to switches, relays, and thermostats.
Ability to identify serviced equipment and recognize unusual noises, check oil levels, and identify frayed or loose belts.
Ability to perform preventive maintenance tasks and limited repairs, follow preventive maintenance schedules, and interpret sketches, wiring diagrams, and equipment manuals.
Knowledge of lubricant characteristics and uses, and of lubrication procedures and schedules and filter and oil changes.
Ability to use tools and equipment such as screwdrivers, wrenches, pliers, grease guns, compressed-air blowers or high-pressure water cleaners, and hand, pneumatic, or electric pumps.
Ability to operate a motor vehicle and its hand and foot controls, judge vehicle clearances and turning radius, account for braking distance and following distance, and follow vehicle safety rules.

Responsibilities

Analyze HVAC filter supply requirements using GFEBS Master Data; verify data and report filter consumption, run rates, annual and periodic needs, forecasts, and consumption records.
Maintain and repair heating, ventilation, air conditioning, refrigeration, and related energy-management systems.
Operate, maintain, and repair air compressors, compressed-air systems, distribution lines, valves, pumps, and related components.
Maintain pumps and systems handling brines or other secondary refrigerating liquids, including associated valves, appurtenances, and lines.
Adjust and recalibrate controls for seasonal conditions and energy-efficient operation.
Operate, maintain, and repair heating systems and boiler controls in accordance with manufacturer specifications.
Diagnose repair needs and perform corrective mechanical, plumbing, and electrical work.
Maintain equipment records and daily logs; complete and return work orders when work is finished.
Perform preventive maintenance, diagnostics, and repairs on conventional air conditioning systems, freezers, refrigeration systems, and associated physical plant equipment.
Maintain, repair, and replace HVAC controls and components, including expansion and pressure-limiting devices, valves, motors, compressors, starters, thermostats, piping, coils, and boiler burners.
Trace electrical circuits; install and repair time clocks and regulatory controls; make minor repairs to circuit breakers and motor controls.
Balance refrigeration and air-conditioning capacities and loads; prepare repair or installation estimates; and order parts and equipment as needed.
Repair or replace plumbing system components, roof and area drains, door systems, and other building components as required.
Support development of a refrigerant-management plan to meet contract requirements.
Operate, repair, and maintain cooling towers, steam systems, heat exchangers, and high-temperature hot-water systems.
Conduct daily water field tests on open HVAC loops for pH, total dissolved solids, conductivity, corrosion-inhibitor concentration, and biocide concentration; enter results in the Government-provided online system and maintain paper records onsite.
Maintain building temperatures during occupied hours in accordance with ASHRAE Standard 55-2013 and adjust heating, cooling, reheating, preheating, and humidity to meet environmental conditions required by equipment.
Diagnose, test, overhaul, install, and repair refrigeration, dehumidification, air-conditioning, ventilation, and heating systems.
Install compressor and condenser units, evaporator units, ductwork, chassis parts, filters, and air and water filters using appropriate tools and specifications.
Cut, bend, and thread tubing and pipe; join refrigerant lines using sleeves, couplings, unions, and soldered joints; and install expansion and discharge valves.
Connect motors, compressors, temperature and humidity controls, and ventilation fans to control panels and connect panels to power sources.
Test systems with nitrogen and refrigerant gas, check joints and connections for leaks, monitor gauges, and adjust controls for proper operation.
Insulate pipes and replace defective breaker controls, thermostats, switches, fuses, and electrical wiring using appropriate tools and test equipment.
Wear and use required personal protective equipment, including safety glasses, safety shoes, ear plugs, and a hardhat.
Support the project Safety Plan through personal involvement, safety training, and adherence to applicable safety requirements.
Perform other duties as assigned.