Commercial Service Technician

Responsibilities:

• Present a positive image to customers, co-workers, and others at all times

• Follow all service department and company policies and procedures

• Adhere to all company safety policies

• Attend training to improve HVAC industry knowledge

• Perform 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 draw

• Calculate CFM using heat rise or static pressure method

• Understand 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 knowledge

• Calculate wire sizes, fuses, and circuit breakers for both low and line voltage loads

• Install and program common DDC controls (e.g., Carrier, Trane)

• Understand operation differences between VAV and VVT boxes

• Identify and work with all types of thermostats: low/line voltage, standard, programmable, digital, and time clocks

• Perform leak detection for water and refrigerant systems

• Possess 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 quality

• Understand the purpose and process of test and balance for building performance, pressure control, and comfort

• Diagnose and repair all types of heating and cooling issues as required

• Possess all necessary tools to complete tasks listed in the job description

Qualification:

• Physical activities include standing, balancing, climbing stairs and ladders

• Must be able to walk and lift 20 pounds or more as part of daily job duties

• Requires use of upper extremities for forward and overhead reaching, pushing, pulling, and material handling

• Requires use of torso and lower extremities for kneeling, crawling, stooping, twisting, and squatting

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