Inspects, installs, adjusts, repairs, replaces, and performs preventative maintenance of heating, ventilation, air conditioning, and refrigeration equipment and controls, including but not limited to condensers, compressors, direct expansion piping systems, and/or other HVAC/R equipment; Checks oil pressure and tests for acidity; Operates and repairs automatic thermostats and controls; Performs major repairs on integrated building temperature control panels and Building Management Systems; Replaces and repairs solenoid valves and Direct Digital Controls on Energy Management Systems; Disassembles, cleans, and repairs automatic electric and pneumatic control valves; Tests, checks, and calibrates thermostats and other sensors and controls; Checks v-belts, lubricates fan bearings, and replaces air filters; Takes and records all temperatures and pressure readings on A/C systems, checks condenser coils for cleanliness, and checks all operational and safety controls on chillers and large and small package units, including built-up systems; Repacks stem valve packing; Cleans and replaces switches, relays, and capacitors in control systems; Checks operational and cut-out controls; conducts complete check of burner assembly and flame safeguards on boilers; Checks units for leaks; Periodically disassembles and overhauls large centrifugal and reciprocating refrigeration compressors and related equipment; Responds to service calls, including emergency off-hours repair service, as needed; Repairs, maintains, and overhauls condensers, chilled water pump seals, and motor bearings; cleans pump suction and Y strainers; Removes condenser heads, cleans face plates, replaces gaskets, and flushes and checks copper tubes on chillers for leaks; Inspects, operates, and repairs pumps and other auxiliary equipment used in HVAC/R systems, including but not limited to cooling towers, heat exchangers, and steam and condensate return systems; Inspects, operates, and repairs low-and-high pressure boiler systems and related heating equipment; Lays out HVAC/R installations of various types and estimates labor, materials, and cost requirements; May be assigned as a Disaster Service Worker (DSW), as required*; Performs other related duties, as required. Ability to: Perform journey-level HVAC/R work in the operation, diagnosis, installation, repair, testing, and maintenance of systems and equipment; Recover, recycle, and reclaim refrigeration cooling systems; Diagnose and correct operating malfunctions; Read, interpret, and work from diagrams and blueprints; Plan, lay out, and estimate materials and labor costs for HVAC/R projects and complete all necessary paperwork; Silver solder and braze; Disassemble and overhaul large scroll and reciprocating refrigeration compressors; Effectively understand and follow written instructions; Utilize department-specific applications, including maintenance management software, direct digital controls, and energy management systems; Communicate effectively, both orally and in writing, with people of diverse backgrounds and cultures; Establish and maintain effective working relationships with those contacted in the course of work, at all levels, including colleagues, the public, and representatives of other agencies.