Commercial Service Technician

Responsibilities:Present a positive image to customers, co-workers, and others at all timesFollow all service department and company policies and proceduresAdhere to all company safety policiesAttend training to improve HVAC industry knowledgePerform preventative maintenance; identify potential issues (e.g., contactors, relay coils, over-amping devices, loads, transformers, motors)Perform electrical troubleshooting; able to read various wiring diagrams (ladder, schematic, parallel, series circuits)Understand all phases of line voltage (single phase, three phase, part start windings, two-speed motors, variable frequency drives)Understand general fan laws: RPM, speed, how pulley or sheave changes and belt sizing affect amperage drawCalculate CFM using heat rise or static pressure methodUnderstand piping systems: refrigerant, water, gas, condensate, pumps, valves (single/two-pipe systems, bypass circuits, modulating valves, circuit setters)Understand water source equipment: water-cooled condensers, chillers, cooling towers, fluid coolers, basic water treatment knowledgeCalculate wire sizes, fuses, and circuit breakers for both low and line voltage loadsInstall and program common DDC controls (e.g., Carrier, Trane)Understand operation differences between VAV and VVT boxesIdentify and work with all types of thermostats: low/line voltage, standard, programmable, digital, and time clocksPerform leak detection for water and refrigerant systemsPossess knowledge of semi-hermetic compressors (change unloaders, valves, valve plates, internal bypass plugs; diagnose mechanical and electrical failures)Understand relationships between temperature, pressure, humidity, and their effects on indoor air comfort and qualityUnderstand the purpose and process of test and balance for building performance, pressure control, and comfortDiagnose and repair all types of heating and cooling issues as requiredPossess all necessary tools to complete tasks listed in the job descriptionQualification:Physical activities include standing, balancing, climbing stairs and laddersMust be able to walk and lift 20 pounds or more as part of daily job dutiesRequires use of upper extremities for forward and overhead reaching, pushing, pulling, and material handlingRequires use of torso and lower extremities for kneeling, crawling, stooping, twisting, and squattingrecblid yhvbo2o80m3psoy473uskszko97cm2