AIR CONDITIONING MECHANIC (3162)

Rev. 7/97

City of San José

AIR CONDITIONING MECHANIC (3162)

CLASS PURPOSE

Under general supervision, performs work of moderate difficulty in the installation, operation, adjustment, troubleshooting, and maintenance of heating, ventilating, refrigeration/cooling systems, and auxiliary equipment. Performs related work as required.

TYPICAL DUTIES AND RESULTS (Any one position may not include all the duties listed, nor do the examples cover all the duties which may be performed.)

Inspects, adjusts, repairs, replaces, and performs preventative maintenance of heating, cooling, air-conditioning, and ventilating equipment and controls.
Repairs packaged A/C units, furnaces, combination units, heating units, and ventilating fans.
Makes repairs and adjustments to associated equipment, such as compressors, pumps, ventilating fans, burners, and air conditioning control systems.
Replaces sub-assembly units in small and large heating, ventilating, and cooling systems.
Performs major repairs on integrated building temperature control panels.
Checks v-belts, lubricates fan bearings, replaces air filters, and purified media on air handlers.
Cleans condenser coils, checks all operational and safety controls, checks suction and discharges pressure, checks for refrigerant leaks, silver solders or silver brazes all breaks, evacuates and recharges system on air conditioning and condensing unit.
Takes and records all temperatures and pressures throughout the system, purges air from the machines, checks condenser coils for fouling, measures specific gravity of solution and refrigerant, checks all operational and safety controls on chillers.
Cleans firesides, checks operational and safety cut-out controls, conducts air/fuel ratio tests, conducts complete check of the burner assembly and flame safeguard on boilers.
Responds to calls for emergency repair service.
May provide lead direction to any assigned helpers.
Maintains time clocks, thermostats, and other controls.
Periodically disassembles and overhauls large centrifugal and reciprocating refrigeration compressors, absorption chillers, and related equipment.
Inspects, operates, and repairs low pressure boiler systems and related heating equipment.
Maintains and repairs water softeners.
Maintains operating logs and related records.
Performs water treatment on related heating and air conditioning equipment.

DISTINGUISHING CHARACTERISTICS

This is the fully skilled journey level class in the Air Conditioning series. Incumbents in the class perform work of moderate difficulty in the installation, operation, adjustment, troubleshooting, and maintenance of heating, ventilating, refrigerating and cooling systems and auxiliary equipment. This class differs from the next higher level class of Senior Air Conditioning Mechanic, in that incumbents of the latter class perform similar work under general supervision and also supervise Air Conditioning Mechanics.

QUALIFICATIONS

Minimum Knowledge, Skills, and Abilities

Knowledge of the principles of heating, refrigeration, ventilating, and cooling systems.
Knowledge of the methods, practices, and tools used in the operation, repair, and maintenance of a variety of heating, refrigeration, ventilating, and cooling systems and equipment used in large and small buildings.
Knowledge of water treatment and testing on heating and air conditioning equipment.
Knowledge of air distribution.
Knowledge of the operation and repair of automatic controls and thermostats.
Knowledge of safety codes and regulations.
Ability to evacuate, repair and recharge refrigeration and cooling systems.
Ability to recover, recycle and reclaim refrigeration and cooling systems.
Ability to diagnose and correct operating trouble.
Ability to read and interpret diagrams and blueprints.
Ability to silver solder and silver braze.

Competency Knowledge, Skills, and Abilities

Ability to provide lead direction.
Ability to disassemble and overhaul large centrifugal and reciprocating refrigeration compressors.
Ability to operate and repair automatic thermostats and controls.

Education

Completion of certificate program in HVAC from a college or university.

Experience

Five years of increasingly responsible experience in the operation, repair, and maintenance of heating, ventilating, refrigeration, and cooling systems which are common to large buildings.

Acceptable Substitutions

None.

Licenses/Certificates

Possession of a valid driver's license authorizing operation of a motor vehicle in California.
Possession of a Universal Certification for Chlorofluorocarbon (CFC) Refrigerants from the Environmental Protection Agency.
As a condition of employment in some designated positions, possession of a valid State of California Class A or B driver's license with applicable endorsements may be required in the performance of job duties.

(5/7/90), (Rev. 12/84), (Rev. 6/86), (Rev. 4/92), (Rev. 7/97)

3162s001.doc