Safe Work Procedure AC Maintenance - …

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).

2 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. 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.

3 1. Planning Personal Injury: - falls - electric shock - hit by moving vehicle - hazardous atmosphere 3H Assess site. 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.

4 1L 2. Preparation Personal Injury: - falls - manual handling - electric shock - laceration - hazardous atmosphere - bacteria - (legionella) - fire/explosion 3H Ensure suitable equipment for job. 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.

5 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. 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.

6 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. 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.

7 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: 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.

8 - 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. 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.

9 - 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.

10 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.