Safe Work Procedure AC Maintenance - nwacservice.com.au

1 Authorised by Mel Milutin North West Airconditioning Service Page 1- Version NORTH WEST AIRCONDITIONING SERVICE PTY LTD Fill = Green 204 safe work Procedure Workplace/Site: Page: 1 of 8 TASK / OPERATION: Air Conditioner Maintenance Overall Risk Rating After Controls 4 Acute 3 High 2 Moderate 1 Low Personal Protective Equipment Fill = Green 204 Day Operations Normal Requirements: Safety footwear (non-slip boots), hearing protection, high visibility shirt or vest, hard hat and sun protection if required hand protection (gloves), overalls/breathing protection (if required). Foot Protection Hearing Protection High Visibility Head Protection Hand Protection Protective Clothing Breathing Protection Safety Notes Fill = Green 204 This SWMS covers risks associated with general Maintenance of air conditioning systems.

2 Ensure the manufacturer s Maintenance manual/guide is available for specific information. Main risks: - falls from height - electrocution/electric shock exposure to harmful atmospheres (asbestos, silica, refrigerant gases, legionella bacteria etc) Authorised by Mel Milutin North West Airconditioning Service Page 2- Version Procedure (in steps): Possible Hazards or Risks of Each Step RB Safety Controls RA Responsible Officer NOTE: RB = Risk Rating before controls implemented - RA = Risk Rating after controls are implemented. 1. Planning Personal Injury: - falls - electric shock - hit by moving vehicle - hazardous atmosphere 3H Assess site.

3 Check: - Anchor points (suitable work load and position) - Proximity to power lines - Type of roof (pitched, tile, sky lights etc) - Condition of roof (fragile, brittle etc) - Presence of hazardous materials such as asbestos, lead, silica etc) - Load bearing capacity of support walls, ceiling, roof - Height of work area - Access for equipment and materials - Number of persons expected on roof/ceiling space - Power supply - Location of existing services (heating, water, pipes, electrical leads) - Traffic Management requirements Develop a site and task specific SWMS to control risks. 1L 2. Preparation Personal Injury: - falls - manual handling - electric shock - laceration - hazardous atmosphere - bacteria - (legionella) - fire/explosion 3H Ensure suitable equipment for job.

4 Examples: - work at heights: o Ensure scissor lift or step platforms are used. If ladders are only option, ensure they are industrial, good condition, set-up correctly and secured both top and bottom. o Where a roof pitch exceeds 35 degrees, do not stand on the roof. work from a cherry picker, scaffold or travel restraint system. o If using travel restraint or fall arrestors, ensure harness and clips are compatible, anchor points have been assessed by qualified persons, training undertaken and emergency plan in place for rescue. 2M Authorised by Mel Milutin North West Airconditioning Service Page 3- Version Procedure (in steps): Possible Hazards or Risks of Each Step RB Safety Controls RA Responsible Officer NOTE: RB = Risk Rating before controls implemented - RA = Risk Rating after controls are implemented.

5 2. Preparation - continued Personal Injury: - falls - manual handling - electric shock - laceration - hazardous atmosphere - bacteria (legionella) - fire/explosion 3H - Manual handling o Use hand trucks, cable trolleys to move materials (such as replacement units) o Use smaller sized cable drums - Power Tools: o Guards in place o Electrical leads in good condition and tested/tagged, RCDs in use o Correct for job/used for purpose o Flame proof where required - Hazardous Materials o If cutting/drilling into structures, determine material type. Provide suitable personal protective equipment for short term works example: o Non-Friable Asbestos: Protective clothing, P1 or P2 half face (can be either disposable or cartridge) o Silica: P1 or 2 half face with particle cartridge Refrigerant Gases: Correct for type of system Cylinders labelled including weight, fill capacity, type and within test date Material safety data sheets available.

6 Ensure correct PPE for type/quantity. Eg: Ammonia: More than 900kg impervious protective clothing with Self Contained Breathing Apparatus (SCBA) 25 mins effective life o Group B2: less than 225kg at least 1fullface respirator with appropriate cartridge Group B2: more than 225: 2 f/face respirators Quantity of any type more than 900kg: SCBA 2M Authorised by Mel Milutin North West Airconditioning Service Page 4- Version Procedure (in steps): Possible Hazards or Risks of Each Step RB Safety Controls RA Responsible Officer NOTE: RB = Risk Rating before controls implemented - RA = Risk Rating after controls are implemented. 2. Preparation - continued Personal Injury: - falls - manual handling - electric shock - laceration - hazardous atmosphere - bacteria (legionella) - fire/explosion 3H Ensure: - Adequate Operating and Maintenance manual available for specific system - AC system has been designed by qualified persons and meets relevant standards for design and installation - If cooling towers present evidence is obtained for previous testing/inspections including.

7 O Biocide dosing o Regular cleaning o Monthly hetertrophic counts o Water testing o Unacceptable results have been rectified - Where in-house gas alarms/detectors are in use, seek evidence of regular testing, calibration and correct placement for type of gas (eg: both sides of compressor and downwind of machinery towards vents, high or low based on gas density to air) - Communication systems in place Note: In absence of adequate operating/ Maintenance manual, seek advice from suitably qualified persons to determine Maintenance requirements, including: - Types of disinfectant required (for water systems) - Type of refrigerant gases - Pressure settings - Electrical settings - Flow/valves and fittings - How to isolate areas for repair works 2M Authorised by Mel Milutin North West Airconditioning Service Page 5- Version Procedure (in steps): Possible Hazards or Risks of Each Step RB Safety Controls RA Responsible Officer NOTE: RB = Risk Rating before controls implemented - RA = Risk Rating after controls are implemented.

8 3. Pre-operational Inspection Personal Injury: - falls - electric shock - hit by moving vehicle - hazardous atmosphere 3H Ensure: - Traffic management in place where required - Sufficient Lighting - Suitable weather conditions - Equipment operational and in good condition - Materials available as required - Electrical leads are not placed in areas where they will pose a tripping hazard or run over. - Safety instructions for refrigerant gases available - Cylinders undamaged and caps on valves - PPE suitable condition (including harnesses, respirators, hearing protection, coveralls etc) - Gas detectors calibrated, tested and functional 2M 4. Operation Personal Injury: - falls - electric shock - entanglement - hit by moving vehicle - hazardous atmosphere - manual handling - slips, trips - laceration - explosion Legislation breach: - Unlicensed operators 3H Ensure: - Equipment room is clear of tripping hazards - Refrigerant pipes are insulated - Belts, pulleys, rotating shafts, fans are guarded - Electrical parts are covered - Pressure gauges are able to be read and compared to Maintenance manual for required settings Isolate area for Maintenance /repair.

9 If required: - De-energize and use lock out/tag out system - If repair works include welding or other hot works: o Isolate section o Remove all refrigerant gases and purge with inert gas o Thoroughly ventilate (open doors, windows and use mechanical ventilation if required) o Ensure fire protection equipment accessible o Obtain Hot work Permit 2M Authorised by Mel Milutin North West Airconditioning Service Page 6- Version Procedure (in steps): Possible Hazards or Risks of Each Step RB Safety Controls RA Responsible Officer NOTE: RB = Risk Rating before controls implemented - RA = Risk Rating after controls are implemented. 4.

10 Operation - continued Personal Injury: - falls - electric shock - entanglement - hit by moving vehicle - hazardous atmosphere - manual handling - slips, trips - laceration - explosion Legislation breach: - Unlicensed operators 3H Follow task specific SMWS and Maintenance manual. Ensure work areas are cleared of off-cuts/ tripping hazards regularly. Use only replacement parts as specified by manufacturer. Use pipe cutters and cable strippers rather than hacksaws and knives. Handling cylinders: - Ensure correct type - Secured (use trolleys/hand-trucks) - Do not drag, slide, roll or drop - Do not allow them to strike each other - Do not lift by valve - Do not suspend (unless manufacturer approved attachment points are provided) - Keep away from anything flammable and oxidizers When filling refrigerant gases: - Only fill to manufacturers recommendations - Fill into low pressure side of system - Disconnect service container as soon as filling is complete When discharging refrigerant gases: - Weigh container during transfer to ensure no overfill.