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Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Undertake preventive maintenance checks
   • Legislative requirements are understood.
   • System components are identified.
   • The operational function of each component is inspected and tested.
   • Correct operation of each component is assessed against specification.
   • Visual inspection and testing with appropriate test equipment is carried out according to refrigeration principles, procedures and safety requirements.
   • Preventative maintenance tasks are performed to manufacturers' specifications using refrigeration techniques and practices.
2. Undertake fault finding on cooling tower/evaporative condenser water systems components
   • System components are identified correctly.
   • The characteristics and operation of each component is understood.
   • The operational function of each component is inspected and tested.
   • Correct operation of each component is assessed against specification.
3. Repair/replace cooling tower/evaporative condenser components
   • Faulty components are localised and malfunction is confirmed by inspection and testing using refrigeration principles, procedures and safety requirements.
   • Faulty components are dismantled and repaired to manufactures' specifications as required.
   • Replacement parts are selected from manufacturers' or other catalogues according to required specifications.
   • Where required, refrigerant is removed/contained following refrigeration principles and procedures to all relevant standards, codes and safety standards.
4. Return to service cooling tower/evaporative condenser components.
   • Components are reassembled and tested for correct operation and assessed against specification.
   • Where required, refrigerant is added to system, following refrigeration principles and procedures to all relevant standards, codes and safety standards.
   • Using refrigeration principles and system application, correct operation of the equipment is verified.
   • Maintenance records/service reports are completed by appropriate designated means.

Required Skills

Required skills

Look for evidence that confirms skills in using tools techniques and equipment necessary to check cooling towerevaporative condenser fans valves centrifugal pumps and components for correct operation obtaining and interpreting specifications comparing system and component performanceoperation against specification identifying faulty components and noncompliances making required adjustments to achieve specifications sourcing and using relevant catalogueslists removing and replacing refrigerant applying safety procedures standard operating procedures and legislative requirements to all work undertaken documenting results of the adjustments

Required knowledge

Look for evidence that confirms knowledge of terminology of cooling towers psychometrics measuring instrumentsequipment specifications and procedures for checking temperatureshumidityair flow operation of centrifugal water pumps terminology of centrifugal water pumps field testing centrifugal pumps operation of water valves including bypass valve either mechanical or electrical operation procedures for testing and operation of controls procedures for testing of fan motors v belts measuring instrumentsequipment specifications and procedures for checking component noise and vibration levels procedures for reporting nonconformances procedures and sequence for performing preventative maintenance on refrigeration and air conditioning systems specifications operational characteristics and process for identifying system components process for localising and confirming faulty components procedures and all legislative and regulatory requirements for safely removing the refrigerant and charging the system procedures for dismantling repairing reassembling and testing components procedure for removalrecharging refrigerant procedures for selecting replacement parts procedures for completing maintenance recordsservice reports

Evidence Required

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria required skills and knowledge range statement and the Assessment Guidelines for the Training Package
Overview of assessment	A person who demonstrates competency in this unit must be able to maintain and repair cooling towers andor evaporative condensers fans centrifugal water pumps valves and control equipment Competency in this unit cannot be claimed until all prerequisites have been satisfied
Critical aspects for assessment and evidence required to demonstrate competency in this unit	Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria including required knowledge and be capable of applying the competency in new and different situations and contexts
Context of and specific resources for assessment	This unit may be assessed on the job off the job or a combination of both on and off the job Where assessment occurs off the job that is the candidate is not in productive work then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team The assessment environment should not disadvantage the candidate This unit could be assessed in conjunction with any other units addressing the safety quality communication materials handling recording and reporting associated with the maintenance and repair of cooling towersevaporative condensers pumps fans or valves or other units requiring the exercise of the skills and knowledge covered by this unit
Method of assessment	Assessors should gather a range of evidence that is valid sufficient current and authentic Evidence can be gathered through a variety of ways including direct observation supervisors reports project work samples and questioning Questioning techniques should not require language literacy and numeracy skills beyond those required in this unit of competency The candidate must have access to all tools equipment materials and documentation required The candidate must be permitted to refer to any relevant workplace procedures product and manufacturing specifications codes standards manuals and reference materials
Guidance information for assessment

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Range Statement

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Components	Fan motor, fan blade, pump, pump motor, sprays, condenser, valves (bypass, shut-off, temperature control valves), thermostat, drift eliminators, v belt, water strainer
Operational	How it works
Test equipment	Sling psychrometer, thermometer, refrigeration gauges, vacuum pump, leak detector, multimeter, insulation resistance tester, assorted hand tools
Manufacturers' specifications	Details supplied by manufactures
Characteristics	The design and installation of the particular component
Malfunction	Could be a fault in any of the components
	Type of installation or equipment

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