RAC SERVICING (DomRAC) NC II – TESDA COURSE MODULE

TESDA TRAINING REGULATIONS FOR RAC SERVICING (DomRAC) NC II COURSE

The RAC SERVICING (DomRAC) NC II Course consists of competencies that a person must achieve to enable him/her to install, service, maintain, troubleshoot and repair domestic air-conditioning and refrigeration units.

This Qualification is packaged from the competency map of HVAC/R Sector – RAC Servicing

A student who has achieved this TESDA Course in RAC SERVICING (DomRAC) NC II is competent to be:

• Domestic Refrigeration and Air-conditioning Technician

TRAINEE ENTRY REQUIREMENTS

This section specifies the qualifications of trainees and educational experience. Other requirements like health and physical requirements are also stated. Passing entry written examinations may also be indicated if necessary.

• Can communicate both oral and written
• Good moral character
• Can perform basic mathematical computation
• Physically and mentally fit

RAC SERVICING (DomRAC) NC II – TRAINING AND REGULATION MODULE

Course Title: RAC SERVICING (DomRAC)
Level: NC II
Nominal Training Duration :

(Basic Competency) 18 Hours
(Common Competency) 42 Hours
(Core Competency) 420 Hours
180 Hours – in-school + 240 Hours – supervised-industry training (SIT)

Total Duration: 480 Hours

The RAC SERVICING (DomRAC) NC II Course is designed to equip individual with operational skills in RAC Servicing which installs, services and maintains, troubleshoots and repairs Domestic Refrigeration and Air-conditioning (Dom/RAC) units. It covers the basic, common and core competencies.

COMPETENCIES REQUIRED IN RAC SERVICING (DomRAC) NC II COURSE

To obtain this TESDA course in RAC SERVICING (DomRAC) NC II, all units prescribed for this qualification must be achieved.

These units of competency comprising this qualification include the following:

UNIT CODE	CORE COMPETENCIES (420 Hours)
HVC723337	Install domestic refrigeration and air-conditioning (DomRAC) units
HVC723338	Service and maintain domestic refrigeration and airconditioning (DomRAC) units
HVC723339	Troubleshoot and repair domestic refrigeration and airconditioning (DomRAC) systems
UNIT CODE	COMMON COMPETENCIES (42 Hours)
HVC713201	Prepare materials and tools
HVC311202	Interpret technical drawings
HVC311201	Observe procedures, specifications and manuals of instructions
HVC713202	Perform basic benchworks
HVC724201	Perform basic electrical works
HVC311204	Maintain tools and equipment
HVC315201	Perform housekeeping and safety practices
HVC311205	Document work accomplished
UNIT CODE	BASIC COMPETENCIES (18 Hours)
500311105	Participate in workplace communication
500311106	Work in a team environment
500311107	Practice career professionalism
500311108	Practice occupational health and safety procedures

This section gives the details and contents of the units of competency required in RAC SERVICING (DomRAC) NC II. These units of competency are categorized into basic, common and core competencies.

CORE COMPETENCIES (RAC SERVICING (DomRAC) NC II)

This section gives the details of the contents of the core units of competency required in RAC SERVICING (DomRAC) NC II.

UNIT OF COMPETENCY: INSTALL DOMESTIC REFRIGERATION AND AIRCONDITIONING (DomRAC) UNITS
UNIT CODE : HVC723337

This unit covers the knowledge, skills and attitudes required to safely install and test domestic refrigeration and air-conditioning (DomRAC) units. It includes conducting survey for installation, installing DomRAC unit and its electrical circuit as well as conducting performance testing.

1. Conduct survey
   • Site conditions and installation requirements are assessed according to manufacturer’s specification and prevailing codes and ordinances.
   • Tools, equipment and materials needed for installation are determined according to site conditions and site installation requirements.
   • Survey result is reported in accordance with enterprise policies and procedures
2. Install DomRAC electrical circuit
   • Roughing-in activities are performed in accordance with the applicable Philippine Electrical Code (PEC) provisions
   • Electrical cabling and wiring devices of correct load carrying capacity are selected and safely installed in line with manufacturer’s instructions
   • Power wiring is installed in accordance with applicable PEC provisions
   • Electrical circuit is tested in accordance with applicable PEC provisions
3. Install DomRAC unit
   • Unit and equipment/components are prepared based on work procedures
   • Bracket, hangers and frames are installed in accordance with manufacturer’s recommendation and/or RAC Code of Practice
   • Unit is positioned and leveled in line with manufacturer’s instructions and/or RAC Code of Practice
   • Sealing materials are installed to ensure an air tight seal around the unit in line with manufacturer’s instructions and/or RAC Code of Practice
   • Condensate drain is installed in accordance with manufacturer’s recommendation and/or RAC Code of Practice
   • Safe manual handling techniques are employed in line with enterprise OH&S procedures
   • 5’s is exercised in line with enterprise policy
4. Conduct performance test
   • Voltage and current are measured according to unit power requirements.
   • Air temperature and velocity are measured based on unit specifications.
   • Sounds and vibration are checked based on unit specifications
   • Service report is accomplished in line with enterprise policies and procedures.

UNIT OF COMPETENCY: SERVICE AND MAINTAIN DOMESTIC REFRIGERATION AND AIR-CONDITIONING (DomRAC) UNITS
UNIT CODE : HVC723338

This unit covers the knowledge, skills and attitudes in servicing and maintaining domestic refrigeration and air-conditioning units. Specifically it includes cleaning and replacing air filters, servicing evaporator/condenser, maintaining fan motor assembly, servicing electrical power and control circuits as well as accomplishing service and maintenance report.

1. Clean and replace air filter
   • Air filter is identified and removed following standard procedures
   • Filter is checked for damage and replaced if required in line with SOPs
   • Air filter is cleaned using the correct tools and cleaning procedures
   • Filter is replaced in accordance with filter specifications
2. Service evaporator/condenser
   • Tools are selected in dismantling the evaporator/condensing unit as per standard operating procedures (SOPs)
   • High pressure washer is used in cleaning evaporator/condensing coil based on established procedures
   • Evaporator/condenser coil fins are straightened in accordance with service procedure
   • Cleaning agent or non-corrosive chemical is used in cleaning and maintaining evaporator/ condensing coil, fins and other body accessories as per standard operating procedures (SOPs)
3. Maintain fan motor assembly
   • Fan motor is maintained in line with manufacturer’s instructions.
   • Fan blades and blower are serviced and maintained in line with manufacturer’s instructions.
   • Fan motor terminals are checked and serviced in line with manufacturer’s instructions.
   • Fan motor mounting is checked and serviced in line with manufacturer’s instructions.
4. Service electrical power and control circuits
   • Proper instrument is used in checking power supply and diagnosing electrical control
   • Loose connections/wirings are repaired and reported in line with SOP
   • Plugs and outlets are checked in line with SOP
   • Grounding is checked in line with SOP
5. Accomplish service and maintenance report
   • All defects and problems encountered are reported in line with enterprise policies and procedures.
   • Observation and recommendation are properly reported in line with enterprise policies and procedures.

UNIT OF COMPETENCY: TROUBLESHOOT AND REPAIR DOMESTIC REFRIGERATION AND AIR-CONDITIONING (DomRAC) SYSTEMS
UNIT CODE : HVC723339

This unit covers the knowledge, skills and attitudes to identify and analyze faults and troubles found in DomRAC systems. It also covers identifying and repairing faults/troubles, performing refrigerant recovery/ recycling and retrofitting on domestic refrigeration and air-conditioning unit as well as performing test-run on repaired DomRAC units.

1. Plan and prepare for troubleshooting and repair
   • Appropriate wiring diagrams, charts and manuals are interpreted in line with the job requirements
   • Appropriate materials, tools and equipment are selected based on job requirements
   • Power supply is checked to ensure compliance with nameplate rating and/or manufacturer’s specifications
2. Identify and repair faults/troubles
   • Appropriate PPE are selected and used in line with job requirements
   • Components are tested following manufacturer’s manual, RAC Code of Practice and/or enterprise troubleshooting policy
   • Faults/problems with components are diagnosed in line with manufacturer’s manual, RAC Code of Practice and/or enterprise troubleshooting policy
   • Remedial action is taken to overcome faults/problems in line manufacturer’s manual, RAC Code of Practice and/or enterprise troubleshooting policy
   • Work is completed safely in line with workplace safety guidelines
   • Report on testing procedure, including faults and minor repair, is completed in line with manufacturer’s manual, RAC Code of Practice and/or enterprise troubleshooting policy
3. Perform refrigerant recovery/recycling and retrofitting/conversion on domestic refrigeration and airconditioning unit
   • Safe working practices are observed throughout the task as per enterprise procedure
   • Suitable tools and equipment are selected and used based on job requirement
   • Optimum recovery of refrigerant is performed in line with RAC Code of Practice
   • Refrigerants recovery/recycling is performed according to manufacturer’s recommendations and RAC Code of Practice
   • Retrofitting is performed based on RAC Code of Practice
   •  Conversion is performed based on UN Conversion Manual.
4. Test-run repaired unit
   • Unit is tested in line with troubleshooting procedures
   • Report on repair and testing of unit is prepared in line with enterprise procedures

COMMON COMPETENCIES

UNIT OF COMPETENCY: PREPARE MATERIALS AND TOOLS
UNIT CODE : HVC713201

This unit covers the knowledge, skills and attitudes in identifying, requesting and receiving construction materials and tools based on the required performance standards.

1. Identify materials
   • Materials are listed as per job requirements
   • Quantity and description of materials conformed to the job requirements
   • Tools and accessories are identified according to job requirements
2. Requisition materials
   • Materials and tools needed are requested according to the list prepared
   • Request is done as per company standard operating procedures
   • Substitute materials and tools are provided without
     sacrificing cost and quality of the work
3. Receive and inspect materials
   • Materials and tools issued are inspected as per quantity and specification
   • Tools, accessories and materials checked for damages according to enterprise procedures
   • Materials and tools are set aside to appropriate location nearest to the workplace

UNIT OF COMPETENCY: INTERPRET TECHNICAL DRAWINGS AND PLANS
UNIT CODE : HVC311202

This unit covers the knowledge, skills and attitudes in analyzing and interpreting symbols, data and work plan based on the required performance standards.

1. Analyze signs, symbols and data
   • Technical plans are obtained according to job requirements
   • Signs, symbols and data are identified according to job specifications
   • Signs symbols and data are determined according to classification or as appropriate in drawing
2. Interpret technical drawings and plans
   • Necessary tools, materials and equipment are identified according to the plan
   • Supplies and materials are listed according to specifications
   • Components, assemblies or objects are recognized as required
   • Dimensions are identified as appropriate to the plan
   • Specification details are matched with existing/available resources in line with job requirements
   • Work plan is drawn following the specifications
3. Apply freehand sketching
   • Where applicable, correct freehand sketching is produced in accordance with the job requirements

UNIT OF COMPETENCY: OBSERVE PROCEDURES, SPECIFICATIONS AND MANUALS OF INSTRUCTION
UNIT CODE : HVC311201

This unit covers the knowledge, skills and attitudes in identifying, interpreting, applying services to specifications and manuals, and storing manuals.

1. Identify and access specification/manuals
   • Appropriate manuals are identified and accessed as per job requirements
   • Version and date of manual is checked to ensure correct specification and procedure are identified
2. Interpret manuals
   • Relevant sections, chapters of specifications/ manuals are located in relations to the work to be conducted
   • Information and procedure in the manual are interpreted in accordance to industry practices
3. Apply information in manual
   • Manual is interpreted according to job requirements
   • Work steps are correctly identified in accordance with manufacturer’s specification
   • Manual data is applied according to the given task
   • All correct sequencing and adjustments are interpreted in accordance with information contained on the manual or specifications
4. Store manuals
   • Manual or specification are stored appropriately to ensure prevention of damage, ready access and updating of information when required in accordance with company requirements

UNIT OF COMPETENCY: PERFORM MENSURATIONS AND CALCULATIONS
UNIT CODE : HVC311203

This unit covers the knowledge, skills and attitudes in identifying and measuring objects based on the required performance standards.

1. Select measuring instruments
   • Object or component to be measured is identified, classified and interpreted to the appropriate regular geometric shape
   • Measuring tools are selected/identified as per object to be measured or job requirements
   • Correct specifications are obtained from relevant sources
   • Appropriate measuring instruments are selected according to job requirements
   • Alternative measuring tools are used without sacrificing cost and quality of work
2. Carry out measurements and calculations
   • Accurate measurements and calculations are obtained to job requirements
   • Alternative measuring tools are used without sacrificing cost and quality of work
   • Calculation needed to complete work tasks are performed using the four basic process of addition (+), subtraction (-), multiplication (x) and division (/) including but not limited to: trigonometric functions, algebraic computations
   • Calculations involving fractions, percentages and mixed numbers are used to complete workplace tasks
   • Numerical computation is self-checked and corrected for accuracy
   • Instruments are read to the limit of accuracy of the tool
   • Systems of measurement identified and converted according to job requirements/ISO
   • Workpieces are measured according to job requirements

UNIT OF COMPETENCY: PERFORM BASIC BENCHWORKS
UNIT CODE : HVC713202

This unit covers the knowledge, skills and attitudes in preparing materials, tools and equipment, lay-outing dimensions and performing basic benchwork based on the required performance standards.

1. Prepare materials, tools and equipment
   • Work plan is interpreted to determine job requirements
   • Materials, tools and equipment are identified and prepared according to job requirements
   • Materials are checked according to the required specifications
   • Tools and equipment conditions are checked following the standard operating procedures (SOPs)
2. Lay-out and mark dimensions/features on workplace
   • Metallic and non-metallic materials are selected according to the requirements specified in the blueprint
   • Dimensions/features are laid-out/marked according to job specifications/blueprint and within the required tolerance
   • Dimensions are checked against the actual work plan
3. Perform required basic metal works
   • Work instructions are followed to ensure work safety
   • Basic metal works are performed applying knowledge on safety procedures and according to job requirements
   • Workpieces are clamped in workholding device to avoid damage and accidents
   • Work pieces are cut, chipped or filed according to required measurements, tolerance specified in the blueprint and free from burrs and sharp edges
   • Drilling is performed according to recommended sequence and specifications
   • Proper usage of materials, tools and equipment is observed
   • Appropriate PPE and safety procedures are applied
   • Worksite is cleaned and cleared of all debris and left in safe state in accordance with OHS regulations

UNIT OF COMPETENCY: PERFORM BASIC ELECTRICAL WORKS
UNIT CODE : HVC724201

This unit covers the knowledge, skills and attitudes in preparing materials, tools and equipment, testing electrical components and basic repairing in electricity based on the required performance standards.

1. Prepare electrical tools and test instruments
   • Work plan is interpreted to determine job requirements
   • Electrical tools and instruments are identified and prepared according to job requirements
   • Electrical tools and instruments are checked for conditions and calibrated as required
2. Test power supply and electrical components
   • Instruments are tested in accordance with PEC
   • Power supply and electrical components are checked in accordance with manufacturer’s specifications/PEC
   • Defects of power supply and electrical components are identified and recorded
   • Safe working habits is observed
3. Perform basic electrical repair
   • Work instructions are followed to ensure safety work
   • Loose connections are tightened in accordance with PEC
   • Defective electrical components are replaced and tested in accordance with PEC
   • Work place is cleaned and in safe state in line with OHSA regulations

UNIT OF COMPETENCY: MAINTAIN TOOLS AND EQUIPMENT
UNIT CODE : HVC311205

This unit covers the knowledge, skills and attitudes in checking condition, performing preventive maintenance and storing of tools and equipment based on the required performance standards.

1. Check condition of tools and equipment
   • Materials, tools and equipment are identified according to classification and job requirements
   • Non-functional tools and equipment are segregated and labeled according to classification
   • Safety of tools and equipment are observed in accordance with manufacturer’s instructions
   • Condition of PPE are checked in accordance with manufacturer’s instructions
2. Perform basic preventive maintenance
   • Appropriate lubricants are identified according to types of equipment
   • Tools and equipment are lubricated according to preventive maintenance schedule or manufacturer’s specifications
   • Measuring instruments are checked and calibrated in accordance with manufacturer’s instructions
   • Tools are cleaned and lubricated according to standard procedures
   • Defective instruments, equipment and accessories are inspected and replaced according to manufacturer’s specifications
   • Tools are inspected, repaired and replaced every after use
   • Work place are cleaned and in safe state in line with OHSA regulations
3. Store tools and equipment
   • Inventory of tools, instruments and equipment are conducted and recorded as per company practices
   • Tools and equipment are stored safely in appropriate locations in accordance with manufacturer’s specifications or company procedures

UNIT OF COMPETENCY : PERFORM HOUSEKEEPING AND SAFETY PRACTICES FOR RAC SERVICING
UNIT CODE : HVC7315201

This unit covers the knowledge, skills and attitudes needed to work safely in the workplace including sorting, cleaning and dispensing materials, tools and equipment, identifying and minimizing hazards, responding and recording accidents and following basic security.

1. Sort materials, tools and equipment
   • Materials, tools and equipment are classified according to its kinds
   • Appropriate areas for materials, tools and equipment are designated
2. Clean workplace area, materials, tools and equipment
   • Cleaning materials are identified and used as per procedure
   • Workplace areas, materials, tools and equipment are cleaned as per company practices
   • Workplace are in safe state in accordance with safety regulations/company practices
3. Systematize dispensing and retrieval of materials, tools and equipment
   • Systems for requesting, borrowing and returning of materials, tools and equipment is in-place and implemented
   • Forms used are completely filled-up and filed
   • Borrowed tools, and equipment are returned to designated area
   • Consumable materials are requested in exact quantity
4. Identify and minimize/ eliminate hazards
   • Hazards in the work area are recognized and reported to designated personnel and appropriate control actions are taken
   • Workplace policies and procedures for controlling risks are established and followed accurately
   • Workplace procedures for dealing with emergencies are followed whenever necessary within the scope o
     responsibilities and competencies
   • Safety signs and hazard warnings are displayed and observed at all times in line with workplace health and safety regulations
   • Equipment and safety devices/PPE are used/handled according to company or manufacturer’s procedures and guidelines
   • Work areas are kept clean, free from obstacles and emergency exits are know and kept clear at all times
   • Safe manual handling/fighting techniques and safe equipment operation techniques are employed at all times
5. Respond and record accidents
   • Workplace accidents are identified
   • Workplace emergency first-aid procedures/treatment are followed/carried out correctly in accordance with standards/regulations and enterprise procedures/policies
   • Medical assistance/rescue is coordinated with concerned personnel in line with organizational policies
   • Accident/incident records maintained in accordance with standard operating procedures
6. Follow basic security
   • Security policies/procedures are followed according to enterprise practices and appropriate legislation
   • Security related events are recorded/reported on the relevant forms
   • Staff are advised of enterprise security procedures and correct methods of implementation

UNIT OF COMPETENCY: DOCUMENT WORK ACCOMPLISHED
UNIT CODE : HVC311205

This unit covers the knowledge, skills and attitudes in documenting work accomplished.

1. Identify forms and data
   • Forms are selected based on the reports to be prepared
   • Data are collected based on the reports to be prepared
2. Prepare reports
   • Reports are completed using standard form as per company procedures
   • Reports provide details of work completed, further action to be taken and other details as per company procedures
   • Reports are completed and submitted within specified time to the concerned personnel/supervisor

BASIC COMPETENCIES

UNIT OF COMPETENCY : PARTICIPATE IN WORKPLACE COMMUNICATION
UNIT CODE : 500311105

This unit covers the knowledge, skills and attitudes required to gather, interpret and convey information in response to workplace requirements.

1. Obtain and convey workplace information
   • Specific and relevant information is accessed from appropriate sources
   • Effective questioning, active listening and speaking skills are used together and convey information
   • Appropriate medium is used to transfer information and ideas
   • Appropriate non- verbal communication is used
   • Appropriate lines of communication with supervisors and colleagues are identified and followed
   • Defined workplace procedures for the location and storage of information are used
   • Personal interaction is carried out clearly and concisely
2. Participate in workplace meetings and discussions
   • Team meetings are at ended on time
   • Own opinions are clear expressed and those of others are listened to without interruption
   • Meeting inputs are consistent with the meeting purpose and established protocols
   • Workplace interactions are conducted in a courteous manner
   • Questions about simple routine workplace procedures and matters concerning working conditions of employment are asked and responded to.
   • Meetings outcomes are interpreted and implemented
3. Complete relevant work related documents
   • Range of forms relating to conditions of employment are completed accurately and legibly
   • Workplace data is recorded on standard workplace forms and documents
   • Basic mathematical processes are used for routine calculations
   • Errors in recording information on forms/documents are identified and properly acted upon
   • Reporting requirements to supervisor are completed according to organizational guidelines

UNIT OF COMPETENCY : WORK IN TEAM ENVIRONMENT
UNIT CODE : 500311106

This unit covers the skills, knowledge and attitudes to identify role and responsibility as a member of a team.

1. Describe team role and scope
   • The role and objective of the team is identified from available sources of information
   • Team parameters, reporting relationships and responsibilities are identified from team discussions and appropriate external sources.
2. Identify own role and responsibility within team
   • Individual role and responsibilities within the team environment are identified.
   • Roles and responsibility of other team members are identified and recognized.
   • Reporting relationships within team and external to team are identified.
3. Work as a team member
   • Effective and appropriate forms of communications used and interactions undertaken with team members who contribute to known team activities and objectives.
   • Effective and appropriate contributions made to complement team activities and objectives, based on individual skills and competencies and workplace context.
   • Observed protocols in reporting using standard operating procedures.
   • Contribute to the development of team work plans based on an understanding of team’s role and objectives and individual competencies of the members.

UNIT OF COMPETENCY : PRACTICE CAREER PROFESSIONALISM
UNIT CODE : 500311107

This unit covers the knowledge, skills and attitudes in promoting career growth and advancement.

1. Integrate personal objectives with organizational goals
   • Personal growth and work plans are pursued towards improving the qualifications set for the profession
   • Intra- and interpersonal relationships is are maintained in the course of managing oneself based on performance evaluation
   • Commitment to the organization and its goal is demonstrated in the performance of duties
2. Set and meet work priorities
   • Competing demands are prioritized to achieve personal, team and organizational goals and objectives.
   • Resources are utilized efficiently and effectively to manage work priorities and commitments
   • Practices along economic use and maintenance of equipment and facilities are followed as per established procedures
3. Maintain professional growth and development
   • Trainings and career opportunities are identified and availed of based on job requirements
   • Recognitions are sought/received and demonstrated as proof of career advancement
   • Licenses and/or certifications relevant to job and career are obtained and renewed

UNIT OF COMPETENCY : PRACTICE  OCCUPATIONAL HEALTH AND SAFETY PROCEDURES
UNIT CODE : 500311108

This unit covers the outcomes required to comply with regulatory and organizational requirements for occupational health and safety.

1. Identify hazards and risks
   • Safety regulations and workplace safety and hazard control practices and procedures are clarified and explained based on organization procedures
   • Hazards/risks in the workplace and their corresponding indicators are identified to minimize or eliminate risk to co-workers, workplace and environment in accordance with organization procedures
   • Contingency measures during workplace accidents, fire and other emergencies are recognized and established in accordance with organization procedures
2. Evaluate hazards and risks
   • Terms of maximum tolerable limits which when exceeded will result in harm or damage are identified based on threshold limit values (TLV)
   • Effects of the hazards are determined
   • OHS issues and/or concerns and identified safety hazards are reported to designated personnel in accordance with workplace requirements and relevant workplace OHS legislation
3. Control hazards and risks
   • Occupational Health and Safety (OHS) procedures for controlling hazards/risks in workplace are consistently
     followed
   • Procedures for dealing with workplace accidents, fire and emergencies are followed in accordance with organization OHS policies
   • Personal protective equipment (PPE) is correctly used in accordance with organization OHS procedures and practices
   • Appropriate assistance is provided in the event of a workplace emergency in accordance with established organization protocol
4. Maintain OHS awareness
   • Emergency-related drills and trainings are participated in as per established organization guidelines and procedures
   • OHS personal records are completed and updated in accordance with workplace requirements

DEFINITION OF TERMS

• Air Cooled Condensing Unit (ACCU)/OUTDOOR UNIT – an equipment that condenses refrigerant vapor using air as the condensing medium. It consist of compressor, condenser coil and fan motor
• Air Cooled Condenser – an equipment that condenses refrigerant vapor using air as the condensing medium
• Air Handling Unit (AHU)/INDOOR UNIT – an air-conditioning component that consists of a fan motor and an evaporator coil. It is this equipment used in air-conditioning that absorbs heat from the space
• Air Distribution – the process of distributing conditioned air into a confined space
• Check – to verify, inspect, or test an HVAC/R component for satisfactory condition with the use of an instrument or a device
• Commercial Refrigeration – covers water coolers/ display coolers, vendo machine, beverage machine icedrop/ice cream/ice cube vending machines
• Conversion – Is a process of applying a flammable, non-ozone depleting substance and low global warming potential refrigerant to a system that ordinarily uses non-flammable, ozone depleting substance and high global warming potential refrigerant. It not only deals with refrigerant replacement but taking into consideration how to mitigate the flammability risk of the process.
• Dehydration – the process of removing moisture from a refrigeration system
• Electric Heat Defrost – use of electric resistance heating coils to melt ice or frost from evaporators
• Evacuation – removal of air/any gas and moisture from a refrigeration system
• Evaporator – the component in a refrigeration system where liquid refrigerant is changed into a vapor by the absorption of heat
• Fan – a mechanical device for moving air
• Fan Coil Unit (FCU) – an air-conditioning component that consists of a fan motor and an evaporator coil
• Filter Drier – the component part used in air-conditioning or refrigeration system to filter and dehydrates refrigerant in the system
• Hot Gas Defrost – component part used to remove frosting on the evaporator coil using hot gas refrigerant from the compressor
• Idler Pulley – a pulley used to maintain proper belt tension
• Inspect – determine the actual condition of HVAC/R component without the use of instrument
• Interlocking – it is the action of interconnecting electric control wires to achieve a sequential action
• Leak Test – the procedure of determining/pin pointing leaks in a pressurized system
• Liquid Line Solenoid Valve – electrically operated valve that shuts-off the flow of the refrigerant to the evaporator
• Metering Device – it is one of the major components in a refrigeration system used to regulate the flow of refrigerant into the evaporator
• Package Air-conditioning Unit (PACU)/SPLIT-TYPE – an airconditioning unit that contains the compressor, water-cooled condenser, metering device and evaporator all of which is in one casing
• Pull-out – to remove from a place of installation
• Pressure Test – a procedure whereby pressure is applied to the piping system, the purpose of which is to determine its soundness and stability
• Pump down – a process of using the compressor to pump and contain all the refrigerant charge into the condenser and/or receiver
• Refrigerant Charging – the process of introducing into the system the proper amount of refrigerant
• Retrofitting – a process of upgrading existing equipment or system using ozone depleting substances to environmental friendly refrigerant
• Service Mechanic – worker who possess basic skills related to HVAC/R system
• Sight Glass/Liquid Line Moisture Indicator – indicates refrigerant quality and charge
• SPLIT-TYPE Airconditioning unit – an air-conditioning unit that contains the compressor, air or water-cooled condenser, metering device in one casing as outdoor unit and evaporator in another casing as indoor unit.
• Supervised Industry Training – similar to on-the-job training – an approach in training designed to enhance the knowledge and skills of the trainee through actual experience in the workplace to acquire specific competencies prescribed in the training regulations.
• Thermostat Expansion Valve (TXV) – a refrigerant control valve connected before an evaporator that regulates flow of refrigerant. Operated by temperature and pressure, and reacts to the degree of gas superheat at the evaporator outlet through a feeler bulb
• Transport Air-conditioning Unit – refers to an air-conditioning unit driven directly from the turning axle of the vehicle when they are in motion, or by the vehicle engine itself, or by a separate gasoline/diesel engine and/or electric motor mounted on the same vehicle. It covers the land and marine/sea transports.
• Troubleshoot – the process of analyzing system defect or malfunction
• Vacuum – pressure lower than atmospheric pressure measured in inches of mercury. Complete vacuum is 29.92 in. mercury or at least 500 microns
• Water Treatment – the use of chemicals in water to prevent corrosion, formation of scales, algae growth and formation of slime
• Window Type Air-conditioning Unit – is a self-contained air-conditioning unit house in a single casing mounted in a wall or window opening
• Workmanlike-manner – quality of work within the accepted industry standard