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State of Washington Classified Job Specification


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Class Code: 621J
Category: Maintenance Trades & Labor


Responsible for heating, ventilation, and air conditioning equipment (HVAC) systems for assigned multi-locations which include the performance of skilled work in diagnostic testing, repair, and maintenance of HVAC and steam distribution systems. 

Distinguishing Characteristics

Positions allocated to this class will be limited to designated HVAC units having the responsibility for multiple institutions, such as Consolidated Support Services in the Department of Social and Health Services. 

Typical Work

Installation, maintenance, diagnosis, and repair of air handlers, air flow dampers, V belts, sheaves, pulleys, and bearings; maintains and repairs commercial refrigeration equipment used in air conditioning, ventilation, and chilled water systems; 

Inspects, maintains and repairs plumbing, heating, water, cooling, refrigeration, sewer and fire suppression systems;  

Analyzes and maintains control systems that include electrical, electronic, and pneumatic sensors and actuators; lay out, fabricate, and install mechanical, pneumatic, electrical, and electronic temperature and humidity controls for heating and ventilation systems; repair relays, timers, meters, and switches with local or remote computer control; reads and interprets blueprints; 

Monitors and adjusts heat and air conditioning in buildings using automated building monitoring and control systems;  

Operates and maintains fluid and electronic testing and measuring instruments, such as manometers, air flow and liquid flow meters, volt meters, ammeters and potentiometers; keeps records of work performed and supplies used; use such tools as drill presses, grinders, bandsaws, hand drills, testers, welding equipment, soldering guns, small hand tools and specialized apparatus; estimates and orders materials and supplies needed to maintain equipment in good working condition; leads and instructs helpers, patients, or inmates;  

Prepares surfaces for welding; uses arc or acetylene welding and burning equipment;  

Performs other work as required. 

Knowledge and Abilities

Knowledge of:  standard practices, methods, materials, tools, and equipment used in mechanical trades and HVAC work; principles of operation of HVAC systems; occupational hazards and safety practices of HVAC trade.   

Ability to:  read, interpret, and update blueprints; use automated building monitoring and control systems, estimate time and materials; use arc and gas welding equipment, instruct helpers, use all types of hand and power tools. 

Legal Requirement(s)

There may be instances where individual positions must have additional licenses or certification.  It is the employer’s responsibility to ensure the appropriate licenses/certifications are obtained for each position.

Desirable Qualifications

Journey-level standing as refrigeration mechanic or steamfitter as attested by: 

            a.         Completion of recognized apprenticeship in refrigeration or steamfitter trades. 


            b.         Full journey-level status in Plumbers and Pipefitters Union.


            c.         Five years of applicable experience in the refrigeration or steamfitter trades or a combination of the two.  Vocational or trade school training as a steamfitter or refrigeration mechanic will substitute, year for year, for work experience up to a maximum of two years. 


            d.         Completion of a recognized apprenticeship program for heating, ventilation, and air conditioning. 

Class Specification History

New class adopted September 11, 1992.
Revise class. Revises typical work; adopted June 3, 1997.
Revise class. Revises class code (formerly 70280), general revision; adopted May 10, 2007, effective July 1, 2007.
Base range salary adjustment adopted 6/13/2019, effective 7/1/2019.