This is skilled mechanical work in the installation, maintenance, repair and operation of heating, ventilation, air conditioning and/or refrigeration systems and components. Work differs from that of the generic trades class in that employees are responsible for the custody of a small group of inmates in the City’s Prison Department and for instructing the inmates in the elements of the trade. Employees are also responsible for performing basic correctional functions as required. An employee in this class performs a variety of tasks associated with the maintenance of facility climate control systems. Employees service air conditioning, refrigeration, ventilation and heating systems and related primary and peripheral utility components. Work involves exposure to disagreeable environmental conditions and moderate physical effort. Employees report to a higher-level maintenance superior.

ALLOCATING FACTORS: (The following conditions must be met for a position to be allocated to this class.)


Maintains and repairs heating, ventilation, air-conditioning and/or refrigeration systems and components; performs a variety of preventive maintenance on equipment according to a prescribed schedule including, but not limited to, replacing oil, belts, filters, and fans, lubricating mechanical components, cleaning systems and calibrating controls; detects and diagnoses equipment malfunctions and performs corrective repairs; repairs and replaces HVAC instrumentation, including electronic components; removes and replaces wiring; runs conduit and connects power lines to breakers; repairs and replaces piping and valves used in the distribution of steam, water, air and gas; cuts and threads piping; welds, solders and brazes line connections, tubing and various fittings; services domestic hot and cold water systems and components; tests repaired equipment for proper operating performance; monitors and regulates equipment operations as necessary.

Explains, demonstrates and instructs prison inmates in the methods and practices involved in the trade; assigns work to inmates and inspects and reviews work upon completion to ensure proper performance; points out problems and discrepancies in inmates' work and gives advice where necessary; keeps order and discipline during work; searches inmates for contraband; suppresses disorders; watches for and reports unusual conditions or disturbances.

Troubleshoots, repairs, calibrates and installs pneumatic and electronic controls, motorized valves, actuators and related equipment; adjusts and replaces sensors, meters, gauges and other instrumentation, including components of computerized systems; repair, and installation of HVAC equipment and components.

Operates various heating, ventilation and air conditioning equipment by monitoring and adjusting valves, switches, electrical, electronic and pneumatic controls and related appurtenances; utilizes computer input commands to adjust automated temperature controls as needed; utilizes laptop computer to assist in diagnosing system problems and controlling operations as it relates to maintenance, repair, and operations of HVAC equipment and components.

Installs duct-work and makes modifications to existing duct-work to accommodate the installation of new equipment; installs new or replacement air conditioning systems and heat pump systems, including split systems, mini-split systems and packaged units; installs various new equipment including but not limited to: rooftop and wall mounted exhaust fans, circulating pump stations, heat exchangers and air compressors.

Recovers reclaims and recycles refrigerant; maintains accurate inventory and usage records; works under stringent guidelines to prevent the accidental or intentional release of harmful CFCs and HCFCs, in accordance with EPA regulations.

Maintains HVAC equipment, primary and peripheral utility components that generate and/or distribute heat, air conditioning, steam, hot and cold water, electricity, gas and compressed air, such as but not limited to air conditioners, boilers, large compressors, pumps, and motors; works on hot water generators and repairs and replaces radiation traps, induction units and related appurtenances; services related facility utility equipment; works on power sources connected to HVAC equipment up to 480 volts.

Applies air conditioning, refrigeration and heating trade practices in maintaining, repairing and installing all types of cooling and heating systems and related equipment and appurtenances such as, but not limited to, air conditioners, refrigerators, freezers, water coolers, ice machines, condensers, and large boilers, pumps, motors, air handlers, chillers, steam generators, and compressors; performs corrective and preventive maintenance on ventilation systems and related components.

Participates in maintenance/skills training programs.

Performs related work as required.


(The following statement represents the minimum training and experience standards, which will be used to admit or reject applicants for tests. Applications submitted by candidates for this class will be reviewed based on training and experience requirements as approved on 8/08.)

NOTE: Training in a post high school approved HVAC or Refrigeration/AC trade school curriculum for a minimum of six months up to a maximum of one year can be equated on a month-by-month basis for the experience requirement.


Ability to physically perform the duties and to work in the environmental conditions required of a position in this class.


Possession of a grade "A" Steam Boiler, Stationary and Refrigeration Engineer license or a grade "B" Refrigeration Engineer license issued by the Philadelphia Department of Licenses and Inspections if required by work assignment.

Possession of a valid proper class motor vehicle operator's license issued by the Commonwealth of Pennsylvania prior to appointment and during tenure of employment as a Prison HVAC Mechanic, if required by work assignment.

Possession of an Environmental Protection Agency (EPA) approved Universal Technician Certificate for the proper handling of CFCs if required by work assignment. Employees are required to obtain any license or certification by federal, state, or municipal mandate if required by work assignment.


Class Established:
CSC: 7/06, Ad Board: 11/06

Latest Spec. Revision:
CSC: 7/08, Ad Board: 8/08