National Competency Based Skill Training Refrigeration and Air-conditioning Mechanic Logbook
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1 National Competency Based Skill Training Refrigeration and Air-conditioning Mechanic Logbook Trainee:... Training Provider:... Year:... Trainee Contact no:...
2 Competency Based Skill Training Logbook Introduction Technical and Vocational Education and Training (TVET) Authority of Ministry of Education regulates and monitors the TVET programs conducted according to the National Competency Standards in the Maldives, to ensure that the competency based trainings delivered in the Maldives are quality assured. Thus, to ensure that the industry gets a skilled workforce, trained according to the industry needs, TVET Authority has developed Competency Based Skill Training (CBST) Logbooks for the National Competency Standards. The CBST Logbook is an assurance to all concerned parties that the training is being conducted with the relevant theory, activities and tasks for the occupation specified in the National Competency Standard. Hence the purposes of maintaining the CBST Logbook is to assess, monitor and improve competency, while giving the opportunity to work more on the needed areas of the occupation as the trainee proceeds with the training. Thus the CBST Logbook is an important component for the trainee to move forward in the training. As the CBST logbook specifies the tasks that an apprentice is to complete to be deemed competent according to the NCS, the Trainee must fill the necessary details of the CBST Logbook regularly, as he/she goes along the training. Similarly, the workplace supervisor has to sign in the log when the apprentice successfully completes each task. Additionally, through the CBST Logbook the external assessor who will be assessing the trainer when the training is complete can identify what are the tasks that the trainee completed under each unit, thus easing the assessment. Refregiration & AC Mechanic Logbook Page 1
3 National Competency Standard for Refrigeration and Air-conditioning Mechanic has two qualifications. 1. FNA02SQ1L307-National Certificate III in Refrigeration and Air-conditioning Mechanic Candidates are to complete Unit 01, Unit 02, Unit 03 and Unit 04 of this logbook. 2. FNA02SQ2L407-National Advance Certificate in Refrigeration and Airconditioning Mechanic Candidates are to complete Unit 01, Unit 02, Unit 03, Unit 04, Unit 05, Unit 06, Unit 07, Unit 08 and Unit 09 of this logbook. Refregiration & AC Mechanic Logbook Page 2
4 Training Details Training course: Name Coordinator Contact number Employer / Supervisor Name Contact number Address of workplace / company: Seal of workplace / company: Refregiration & AC Mechanic Logbook Page 3
5 NSC Unit Elements Of Competence (Tasks) Perform installation of window and split type air conditioners o Install Window type Air Conditioner o Install Split type air conditioner FNA02S2U01V1 Lesson title and date Perform installation of window and split type air conditioners Trainee Task Type Date Completed Trainee Trainer 1. Is able to identify the location where air conditioner is to be installed according to specifications or client s requirements 2. Able to check and mark location for installation of air conditioner 3. Unit mounted firmly on supporting structures according to manufacturer s specifications, and air conditioner fixed according to manufactures specifications 4. Wall surface finished as per client s requirements 5. Power supply checked, air conditioner switched on, and unit tested for satisfactory performance 6. Location where air conditioner is to be installed marked according to specifications / client s requirements 7. Knows how to prepare location for installation of air conditioner 8. Supporting structures to hold Air Conditioner fixed according to manufacturer s specifications 9. Condenser (out door unit) fixed according to manufacturer s specifications 10. Evaporator (in door unit) fixed according to manufacturer s specifications 11. Refrigerant lines connected to condensing (out door) unit and evaporator (in door) unit with extensions if required. 12. Refrigerant lines purged / vacuum as necessary, pressure tested and charged with refrigerant. 13. Refrigerant lines insulated, as necessary 14. Electrical wiring to main unit installed and connected, as necessary 15. Refrigerant lines mounted firmly using specified fixing accessories 16. System switched on, according to instructional manual and Performance of Air Conditioner checked 17. Unusual noises, vibrations etc. checked and defects Refregiration & AC Mechanic Logbook Page 4
6 rectified, as necessary 18. Major defects reported to relevant authorities Trainer Name: Completion Date: Feedback to Candidate: For TVET Certified External Assessor Use Only Name and : Unit Assess Date: Feedback to candidate: Refregiration & AC Mechanic Logbook Page 5
7 NSC Unit Elements Of Competence (Tasks) Lesson title and date Repair Air Window & Split Type Air Conditioners FNA02S2U02V1 o Check and identify defects in window type & split type Air Conditioner o Repair window type & split type Air Conditioners Repair Air Window & Split Type Air Conditioners Trainee Task Type Date Completed Trainee Trainer 1. The unit checked and the extent of repair needed ascertained and recorded 2. Equipment / items, material and accessories listed as required for job 3. All components, of the electrical / electronic circuit checked according to standard/practices and manufacturers specifications to ensure correct performance 4. All components of the refrigerant circuit checked according to standard/practices and manufactures specifications to ensure correct performance 5. All components of the Air-flow system checked according to standard/practices and manufactures specifications to ensure correct performance 6. Outer cover / chassis checked for corrosion 7. System pressure tested with dry nitrogen, gas leaks located, using specified equipment following safety procedures 8. System evacuated using vacuum pump and tested, according to manufacturer s specifications and gas recharged using specified type of gas and recharging equipment, to required specification following safety practices 9. Air filter cleaned as necessary 10. Corrosion in outer cover / chassis attended to and restored to required conditions 11. Unit operated, checked and satisfactory performance ensured, according to manufacturer s specifications Trainer Name: Completion Date: Feedback to Candidate: Refregiration & AC Mechanic Logbook Page 6
8 For TVET Certified External Assessor Use Only Name and : Unit Assess Date: Feedback to candidate: Refregiration & AC Mechanic Logbook Page 7
9 NSC Unit Elements Of Competence (Tasks) Lesson title and date Prepare refrigerators, deep freezers, display units, bottle FNA02S2U03V1 coolers, water coolers and mobile refrigeration plants o Repair domestic refrigerators, deep freezers and bottle coolers o Repair water coolers o Repair refrigeration mobile plants Prepare refrigerators, deep freezers, display units, bottle coolers, water coolers and mobile refrigeration plants Trainee Task Type Date Completed Trainee Trainer 1. Equipment checked and extent of repair needed in domestic refrigerators, deep freezers and bottle coolers ascertained 2. Equipment / items, material and accessories listed as required for repairing domestic refrigerators, deep freezers and bottle coolers 3. All components, of the electrical / electronic circuit in domestic refrigerators, deep freezers and bottle coolers checked according to standard/procedures to ensure correct performance and defects rectified 4. All components of the refrigerant circuit checked according to manufactures specifications and to procedures to ensure correct performance and defects rectified in domestic refrigerators, deep freezers and bottle coolers 5. Body / cabinet / mounts of domestic refrigerators, deep freezers and bottle coolers checked and restored to the required condition 6. System pressure of domestic refrigerators, deep freezers and bottle coolers tested and gas leaks repaired and tested using specified test instruments 7. System of domestic refrigerators, deep freezers and bottle coolers evacuated using vacuum pump, recovered refrigerant stored in recovery unit, and gas recharged by weight using specified equipment according to specifications 8. Door heaters, thermostat, door gasket of domestic refrigerators, deep freezers and bottle coolers checked and serviced / replaced where necessary, to ensure proper functioning 9. Interior cooler space of domestic refrigerators, deep freezers and bottle coolers checked, cleaned and ensured dust/ debris free 10. Domestic refrigerators, deep freezers and bottle coolers operated and checked to ensure satisfactory performance according to Refregiration & AC Mechanic Logbook Page 8
10 manufactures specifications 11. Equipment checked and extent of repair needed in water coolers ascertained 12. Equipment / items, material and accessories listed as required for repairing water coolers 13. All components, of the electrical / electronic circuit in water coolers checked according to standard/procedures to ensure correct performance and defects rectified 14. All components of the refrigerant circuit checked according to manufactures specifications and to procedures to ensure correct performance and defects rectified in water coolers 15. Body / cabinet / mounts of water coolers checked and restored to the required condition 16. System pressure of water coolers and gas leaks in water coolers repaired and tested using specified test instruments 17. System of water coolers evacuated using vacuum pump, recovered refrigerant stored in recovery unit, and gas recharged by weight using specified equipment according to specifications 18. Thermostat of water cooler checked and serviced/replaced as necessary 19. Water cooler operated and checked and its satisfactory performance ensured 20. Refrigeration mobile plant checked and extent of repair ascertained 21. All components, of the electrical / electronic circuit in refrigeration mobile plant checked according to standard/procedures to ensure correct performance and defects rectified 22. All components of the refrigerant circuit checked according to manufactures specifications and to procedures to ensure correct performance and defects rectified in refrigeration mobile plant 23. Body, mounts checked and restored to the required condition of refrigeration mobile plant 24. System pressure of refrigeration mobile plant tested using dry nitrogen gas and gas leaks repaired and tested using specified equipment 25. System of refrigeration mobile plant evacuated using vacuum pump, recovered refrigerant stored in recovery unit, and gas recharged by weight using specified equipment according to specifications 26. Door heaters, thermostat, door gasket of refrigeration mobile plant checked and serviced / replaced where necessary, to ensure proper functioning 27. Interior cooler space of refrigeration mobile plant checked, cleaned and ensured dust / debris free Refregiration & AC Mechanic Logbook Page 9
11 28. Refrigeration mobile plant operated and checked to ensure satisfactory performance according to manufactures specifications Trainer Name: Completion Date: Feedback to Candidate: For TVET Certified External Assessor Use Only Name and : Unit Assess Date: Feedback to candidate: Refregiration & AC Mechanic Logbook Page 10
12 NSC Unit Elements Of Competence (Tasks) Lesson title and date Prepare estimate on installations and /or FNA02S2U04V1 maintenance of refrigeration and air conditioning systems o Prepare estimate for repair & maintenance of refrigeration / air conditioning systems o Prepare estimate for new installation of air conditioning systems o o Prepare estimate for new installation of Refrigeration Systems Prepare an estimate for relocation of Refrigeration / or Air conditioning Systems Prepare estimate on installations and /or maintenance of refrigeration and air conditioning systems Trainee Task Type Date Completed Trainee Trainer 1. Refer records on requirements of equipment/items, material and estimated labour hours for job when preparing estimate for repair & maintenance of refrigeration / air conditioning systems 2. Replacement parts and components for repair/ maintenance of system listed out when preparing estimate for repair & maintenance of refrigeration / air conditioning systems 3. Cost of parts and components to be replaced estimated when preparing estimate for repair & maintenance of refrigeration / air conditioning systems 4. Cost of labour worked out when preparing estimate for repair & maintenance of refrigeration / air conditioning systems 5. Cost of repair to be sub contracted identified and estimated when preparing estimate for repair & maintenance of refrigeration / air conditioning systems 6. Cost of transport of service personnel, material, parts & components worked out when preparing estimate for repair & maintenance of refrigeration / air conditioning systems 7. Overall overhead costs and taxes estimated when preparing estimate for repair & maintenance of refrigeration / air conditioning systems 8. Total estimate including a profit margin worked out when preparing estimate for repair & maintenance of refrigeration / air conditioning systems 9. Estimate submitted to engineer / client and approval obtained for the estimate for repair & maintenance of refrigeration / air conditioning systems 10. Power requirement of air conditioner unit, availability and adequacy of supply power checked Refregiration & AC Mechanic Logbook Page 11
13 when preparing estimate for new installation of air conditioning systems 11. Measurements of space to be air conditioned and its volume calculated and noted down when preparing estimate for new installation of air conditioning systems 12. The purpose of the space usage identified to classify how it will be utilized, when preparing estimate for new installation of air conditioning systems 13. The average number of people who will be within this space and orientation of room identified and noted down, when preparing estimate for new installation of air conditioning systems 14. The type of construction of building identified to facilitate installation procedures when preparing estimate for new installation of air conditioning systems 15. Number of lights and other heat dissipating equipment used within space identified and noted down when preparing estimate for new installation of air conditioning systems 16. Correct type of air conditioner selected to suit customer s requirement when preparing estimate for new installation of air conditioning systems 17. Cost of labour necessary to install AC worked out when preparing estimate for new installation of air conditioning systems 18. Cost of transport for service personnel, material, parts & components worked out when preparing estimate for new installation of air conditioning systems 19. Overall overhead costs including taxes and labour costs worked out when preparing estimate for new installation of air conditioning systems 20. Total estimate for installation of air conditioning system worked out when preparing estimate for new installation of air conditioning systems 21. Estimate submitted to engineer / client and approval obtained for the estimate for new installation of air conditioning systems 22. Power requirement of refrigeration unit, and availability and adequacy of power supply checked when preparing estimate for new installation of Refrigeration Systems 23. Measurements of space to be refrigerated and its cooling load calculated and noted down when preparing estimate for new installation of Refrigeration Systems 24. Purpose of refrigeration unit usage identified to classify how it will be utilized when preparing estimate for new installation of Refrigeration Systems Refregiration & AC Mechanic Logbook Page 12
14 25. Number of lights and other heat dissipating equipment used within unit identified and noted down when preparing estimate for new installation of Refrigeration Systems 26. When preparing estimate for new installation of Refrigeration Systems correct type of refrigeration system/or unit selected to suit customer s requirements 27. When preparing estimate for new installation of Refrigeration Systems cost of labour necessary to install refrigeration equipment, worked out 28. When preparing estimate for new installation of Refrigeration Systems cost of transport for service personnel, material, parts & components worked out 29. Overhead costs including taxes, worked out when preparing estimate for new installation of Refrigeration Systems 30. Total estimate for installation of refrigeration system /unit including a profit margin, worked out when preparing estimate for new installation of Refrigeration Systems 31. Estimate submitted to engineer / client and approval obtained when preparing estimate for new installation of Refrigeration Systems 32. System / Unit checked and its new location identified for preparing an estimate for relocation of Refrigeration / or Air conditioning Systems 33. Power requirement of refrigeration unit / Air conditioner, and availability and adequacy of supply power checked for preparing an estimate for relocation of Refrigeration / or Air conditioning Systems 34. Requirements of refrigerant tubing, other parts & components necessary for relocation of system / or unit listed out and estimated when preparing an estimate for relocation of Refrigeration / or Air conditioning Systems 35. Cost of blanking of existing location, recovery of gas, pumped out estimated when preparing an estimate for relocation of Refrigeration / or Air conditioning Systems 36. Cost of labour, transport and materials worked out when preparing an estimate for relocation of Refrigeration / or Air conditioning Systems 37. Total estimate including a profit margin worked out when preparing an estimate for relocation of Refrigeration / or Air conditioning Systems 38. Estimate submitted to relevant authority / or client and approval obtained for the estimate for relocation of Refrigeration / or Air conditioning Systems Refregiration & AC Mechanic Logbook Page 13
15 Trainer Name: Completion Date: Feedback to Candidate: For TVET Certified External Assessor Use Only Name and : Unit Assess Date: Feedback to candidate: Refregiration & AC Mechanic Logbook Page 14
16 NSC Unit Elements Of Competence (Tasks) Lesson title and date Perform installation of Central air Conditioners o Install the main air conditioning plant o Install Cooling Tower o Install Air Handling Equipment o Install Ducts o Operate and test the Air Conditioning system Perform installation of Central air Conditioners FNA02S2U05V1 Trainee Task Type Date Completed Trainee Trainer 1. Availability of required electrical power supply checked and ensured when installing the main air conditioning plant 2. Air Conditioner checked and its suitability according to requirement ensured when installing the main air conditioning plant 3. Layout plan and manufacturer s specifications/instructions referred to, and location of installation identified when installing the main air conditioning plant 4. A list of items and material prepared and number of labour hours required for the job estimated when installing the main air conditioning plant 5. Floor / foundation checked & tested and required level and firmness confirmed when installing the main air conditioning plant 6. Unit transferred to required location giving attention to safety precautions when installing the main air conditioning plant 7. The unit mounted at pre-identified location, adjusted and leveled when installing the main air conditioning plant 8. Piping & connections for chilled water & condenser water installed in the main air conditioning plant 9. Stop valves in condenser and evaporator, and thermometer wells and pressure taps installed according to specification in the main air conditioning plant 10. Condenser and chilled water pumps installed according to specification in the main air conditioning plant 11. Electrical wiring and control panels/switchgear installed according to specifications in the main air conditioning plant 12. Cooling Tower inspected and its suitability verified and confirmed before installing it 13. Layout plan and manufacturer s specifications/instructions referred to, and location Refregiration & AC Mechanic Logbook Page 15
17 for installation identified when installing Cooling Tower 14. Floor / foundation checked & tested and required level and firmness confirmed when installing Cooling Tower 15. Unit transferred to required location ensuring safety precautions when installing Cooling Tower 16. Unit mounted at pre-identified location, adjusted and leveled when installing Cooling Tower 17. Cooling tower basin installed and leveled when installing Cooling Tower 18. Fill packs installed in Cooling Tower 19. Cooling tower motor and fan installed in Cooling Tower 20. Water pipes to cooling tower connected, as necessary when installing cooling tower 21. Electrical wiring to cooling tower connected when installing cooling tower 22. Cooling tower tested for satisfactory performance and adjustments made, where necessary when installing cooling tower 23. Air handling equipment installed according to specification at the specified location 24. Electrical supply, piping and duct lines connected using specifies accessories and tools when installing air handling equipment 25. Drawings and specifications for installing ducts read & interpreted before installing ducts 26. Places where ducts are to be laid, marked according to specifications before installing ducts 27. Brackets / supports for mounting of ducts installed as necessary when installing ducts 28. Ducts mounted, leveled and adjusted, as necessary during installation 29. Fire dampers and air volume dampers in ducts installed as per drawings during installation 30. Ducts heat insulated according to manufacturer s specifications during installation 31. Final connections of ducts to air handling plant done as per manufacturer s instructions 32. Availability of required electrical power supply checked and ensured when installing ducts 33. Air side equipment of system energized when installing duct 34. Defects in air side checked and adjustments done, as necessary when installing duct 35. Condensing medium equipment such as air cooled condensers / cooling towers and pumps of the air conditioning system checked 36. Crank case heaters of main plant energised for specified number of hours according to manufacturer s specifications, and main air Refregiration & AC Mechanic Logbook Page 16
18 conditioning equipment of the air conditioning system switched on 37. Readings of electrical power taken and electrical safety gear checked, unusual noises & vibrations identified checked and corrected and refrigerant circuit of air conditioning system checked and leaks attended 38. All checks specified in instructions manual of air conditioning system carried out and readings recorded 39. Air conditioning system operated and checked for satisfactory performance 40. Performance of the equipment in the air conditioning system recorded 41. Major defects in the air conditioning system reported to engineer and his advice sought Trainer Name: Completion Date: Feedback to Candidate: For TVET Certified External Assessor Use Only Name and : Unit Assess Date: Feedback to candidate: Refregiration & AC Mechanic Logbook Page 17
19 NSC Unit Elements Of Competence (Tasks) Lesson title and date Operate & Maintain Central Air Conditioning FNA02S2U06V1 Systems o Identify the central air conditioning system for operation / maintenance o Start & operate the central chilled water air conditioning system (with water cooled condenser) o Start & operate the chilled water central air conditioning system (with air cooled condenser) o Maintain central air conditioning systems Operate & Maintain Central Air Conditioning Systems Trainee Task Type Date Completed Trainee Trainer 1. Electrical source of central air conditioning system checked and verified if the supply is within the requirements 2. Ensure the availability of continuous supply of good quality water in the central air conditioning system 3. Operational manual and other operational guide lines provided by manufacturer for operating plant of the central chilled water air conditioning system (with water cooled condenser), studied and steps to be followed identified 4. Air purge valve and water level of expansion tank checked in the central chilled water air conditioning system (with water cooled condenser) 5. Cooling tower fans of the central chilled water air conditioning system (with water cooled condenser) started, checked and correct operation ensured 6. Unusual noises in the central chilled water air conditioning system (with water cooled condenser) checked and attended to, and correct performance of cooling tower fans ensured 7. Condenser cooling water pumps in the central chilled water air conditioning system (with water cooled condenser), started, their performance checked and servicing / repairs carried out, as necessary 8. Chilled water pumps in the central chilled water air conditioning system (with water cooled condenser), started, their performance checked and servicing/or repairs carried out, as necessary 9. Air side equipment in the central chilled water air conditioning system (with water cooled condenser) activated and necessary servicing / repairs carried out 10. Main air conditioning plant in the central chilled water air conditioning system (with water cooled condenser) started and servicing / repairs done, as necessary Refregiration & AC Mechanic Logbook Page 18
20 11. Temperature readings taken at all places of air conditioned space of the central chilled water air conditioning system (with water cooled condenser) and recorded 12. Main plant of the central chilled water air conditioning system (with water cooled condenser) checked, readings taken at regular intervals and recorded in operational log sheets 13. Operational manual and other operational guide lines provided by manufacturer for operating plant of the central chilled water air conditioning system (with air cooled condenser), studied and steps to be followed identified 14. Steps outlined in manufacturer s guidelines for starting & operating central chilled water air conditioning system (with air cooled condenser) unit, followed as specified 15. Condenser fans of central chilled water air conditioning system (with air cooled condenser), started and their performance checked to ensure proper performance 16. Unusual noises in condenser fans of central chilled water air conditioning system (with air cooled condenser) checked and faults cleared 17. Main plant of central chilled water air conditioning system (with air cooled condenser) started, readings taken at regulator intervals and recorded in log sheets 18. Compressor in the central air conditioning system checked, oil changed as specified by manufacturer 19. Water cooled condenser in the central air conditioning system checked and its satisfactory performance ensured 20. Electrical controls and panels of air conditioning system cleaned & serviced / replaced, as necessary, according to instructions of manufacturer 21. Refrigerant pressure, water flow rates, water inlet & outlet temperatures of air conditioning system checked and necessary adjustments attended to as necessary 22. Cooling tower and water treatment systems of air conditioning system checked and their satisfactory performance ensured 23. Water pumps, cooling towers and condensing units of air conditioning system checked for their satisfactory performance and adjustments done, as necessary 24. Corrosion checked and removed from the air conditioning system, as necessary Refregiration & AC Mechanic Logbook Page 19
21 Trainer Name: Completion Date: Feedback to Candidate: For TVET Certified External Assessor Use Only Name and : Unit Assess Date: Feedback to candidate: Refregiration & AC Mechanic Logbook Page 20
22 NSC Unit Elements Of Competence (Tasks) Lesson title and date Install, Maintain & Repair Cold Rooms / Freezer FNA02S2U07V1 Rooms / Ice Plants o Identify the selected design of cold room / freezer room / ice plant for installation o Install cold room/ freezer room / ice plant o Maintain / repair cold room / freezer room Operate & Maintain Central Air Conditioning Systems Trainee Task Type Date Completed Trainee Trainer 1. Client s requirements identified, noted and location of installation inspected 2. Specifications of selected system, checked to ensure matching with selected design of the unit o A list of equipment/items and material prepared required for installing cold room/ freezer room / ice plant 3. Components of system selected according to requirements for the installation 4. Floor prepared and leveled to install cold room/ freezer room / ice plants according to lay out plans 5. Cold room / freezer room / ice plant installed according to specifications, following manufacturers specification 6. Refrigeration equipment including piping & electrical wiring installed following standard practices and safety procedures 7. System checked and tested before commissioning, as per specifications and manufacturer s instructions, and under the supervision of the engineer 8. Commissioning data indicating system pressures, electrical data, humidity & temperatures outside and inside cold room, recorded and filed for future use 9. Cold room / freezer room / ice plant checked and extent of repair / or maintenance ascertained and recorded 10. Equipment / items and material and accessories listed as required for repair or maintenance of cold room / freezer room / ice plant 11. All components of the electrical / electronic circuits checked according to standard practice and manufacturers specifications to ensure correct performance and defects rectified during repair or maintenance of cold room / freezer room / ice Refregiration & AC Mechanic Logbook Page 21
23 plant 12. All electro - mechanical safety cut outs checked and performance ensured according to manufacturer s specifications during repair or maintenance of cold room / freezer room / ice plant 13. All mechanical devices such as drive belts etc. checked for correct performance according to manufacturer s specifications during repair or maintenance of cold room / freezer room / ice plant 14. During repair or maintenance of cold room / freezer room / ice plant all components of the refrigeration circuit checked and defects rectified for correct performance according to manufacturer s specifications 15. Body mounts checked and restored to the required condition during repair or maintenance of cold room / freezer room / ice plant 16. System pressure tested and gas leaks repaired and tested using specified test instrument during repair or maintenance of cold room / freezer room / ice plant 17. System evacuated using vacuum pump and gas recharged by weight using specified equipment according to specifications during repair or maintenance of cold room / freezer room / ice plant 18. Door heaters, door gaskets and thermostat checked, serviced / or repaired where necessary to ensure proper functioning during repair or maintenance of cold room / freezer room / ice plant 19. Interior cooler space checked, cleaned and ensured dust / debris free during repair or maintenance of cold room / freezer room / ice plant 20. In case of ice plants, water source checked according to specifications during repair or maintenance 21. Plant operated, checked and tested to ensure satisfactory performance according to manufacturer s specifications during repair or maintenance 22. Commissioned the plant according to manufactures specifications, following safety procedures, under the supervision of the engineer and recorded readings / data obtained during commissioning of the plant and checked against manufacturers specifications Trainer Name: Completion Date: Refregiration & AC Mechanic Logbook Page 22
24 Feedback to Candidate: For TVET Certified External Assessor Use Only Name and : Unit Assess Date: Feedback to candidate: Refregiration & AC Mechanic Logbook Page 23
25 NSC Unit Elements Of Competence (Tasks) Install & Service Freezer Truck Freezer Units o o o Install freezer units Service / repair refrigerant system of the freezer unit Repair electrical / electronic control system of the freezer unit FNA02S2U08V1 Lesson title and date Operate & Maintain Central Air Conditioning Systems Trainee Task Type Date Completed Trainee Trainer 1. Insulated truck inspected to determine the viability of installing a freezer unit to full fill the clients requirements 2. Layout planes on installation of system read and interpreted according to manufacturer s specifications 3. List of material, equipment and items prepared for installing freezer units according to the requirement 4. Components of the system checked against specifications for suitability before installing freezer unit 5. Mounts and brackets required for the installations of the freezer unit fixed at correct locations according to specification 6. Evaporator unit and other refrigeration equipment including refrigeration piping installed according to manufacturer s specification 7. Electrical circuits for the freezer unit installed and connected to the respective power systems as necessary following standard practices and safety procedures 8. Freezer unit operated and tested for proper functioning as specified in the installation manual 9. Necessary readings / data pertaining to the performance of the unit recorded during installations 10. Refrigerant in the system recovered using specified recovery equipment and following safety practices for Service / repair of refrigerant system of the freezer unit 11. Condition of the compressor checked for defects and defective parts serviced / or replaced, oil level checked and topped up where necessary according to specifications and manufactures instructions for Service / repair of refrigerant system of the freezer unit 12. Evaporator checked visually and pressure tested for leaks / clogs etc. and serviced / or replaced where necessary during Service / repair of refrigerant system of the freezer unit 13. Expansion valve checked for proper operation and Refregiration & AC Mechanic Logbook Page 24
26 serviced / or replaced as necessary during Service / repair of refrigerant system of the freezer unit 14. Condenser checked visually and pressure tested for leaks / clogs etc. and serviced / or replaced as necessary using specified test equipment, adhering to safety practices during Service / repair of refrigerant system of the freezer unit 15. Cooling / blower fans checked for performance, tested and serviced / or replaced as necessary according to manufacturer s instructions, adhering to safety practices during Service / repair of refrigerant system of the freezer unit 16. Filter/receiver driers inspected and replaced as necessary according to manufacturer s specifications during Service / repair of refrigerant system of the freezer unit 17. Refrigerant liquid lines and hoses pressure tested using specified test equipment adhering to safety practices and leaks repaired, and pressure tested after repair of leaks during Service / repair of refrigerant system of the freezer unit 18. Sight glass, oil separator, gas accumulator checked and replaced as necessary during Service / repair of refrigerant system of the freezer unit 19. System evacuated using dry nitrogen and vacuum pump and tested according to specifications during Service / repair of refrigerant system of the freezer unit 20. System gas charged with specified refrigerant using gas-charging equipment according to manufacturer s specifications during Service / repair of refrigerant system of the freezer unit 21. Internal and external electrical / electronic control systems checked for operations and repaired where necessary according to manufacturer s instructions 22. Electronic climatic controls checked for satisfactory operation and replaced where necessary according to manufacturer s instructions during repair of electrical / electronic control system of the freezer unit 23. Plant checked for specified performance against manufacturer s specifications and satisfactory performance ensured during repair of electrical / electronic control system of the freezer unit Trainer Name: Completion Date: Feedback to Candidate: Refregiration & AC Mechanic Logbook Page 25
27 For TVET Certified External Assessor Use Only Name and : Unit Assess Date: Feedback to candidate: Refregiration & AC Mechanic Logbook Page 26
28 NSC Unit Elements Of Competence (Tasks) Lesson title and date Perform Refrigerant Recovery & Re - Cycling FNA02S2U09V1 o Couple the recovery unit to the equipment for recovery o Recover Refrigerant o Re-cycle Refrigerant Perform Refrigerant Recovery & Re - Cycling Trainee Task Type Date Completed Trainee Trainer 1. Type of refrigerant to be recovered identified, according to available information 2. Appropriate system for connection of charging hoses, either with piercing valve or charging valve selected according to requirements 3. Recovery unit ensured to be free of any other type of refrigerant. Refrigerant in unit transferred to a separate cylinder, ensuring that no refrigerant escapes to atmosphere 4. Gauge manifold connected to system, according to standard colour codes of hoses of manifold gauge 5. Recovery unit coupled to equipment, following standard procedure for connections 6. Overfill protection device checked and safety of operation ensured 7. Recovery unit started, process monitored and full recovery of refrigerant, ensured 8. Recovery unit stopped, system disconnected according to standard procedure, ensuring that no refrigerant escapes to atmosphere 9. Type of recovered refrigerant checked and cylinder weighed 10. Recovered refrigerant cylinder and empty cylinder coupled to recycling machine, observing standard procedure and safety practices 11. Re-cycling machine started, and process monitored ensuring proper operation 12. Hoses disconnected cylinder re-weighed and weight of re-cycled refrigerant recorded 13. Re-cycling of all recovered refrigerant ensured Trainer Name: Completion Date: Feedback to Candidate: Refregiration & AC Mechanic Logbook Page 27
29 For TVET Certified External Assessor Use Only Name and : Unit Assess Date: Feedback to candidate: Refregiration & AC Mechanic Logbook Page 28
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