Comprehensive SWMS for Commercial and Industrial Refrigeration System Installation

Refrigeration Safe Work Method Statement

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Refrigeration system installation involves the complete setup of commercial and industrial cooling systems including walk-in cool rooms, blast freezers, display cabinets, process cooling equipment, and central refrigeration plants. This complex mechanical and electrical work requires coordination of multiple trades, integration of refrigeration equipment, pipework installation, electrical connections, insulation work, and commissioning procedures. Hazards include working at heights installing condensing units on roofs, confined space entry in cool rooms during construction, pressure system work with refrigerant lines, electrical hazards from high-power equipment, manual handling of heavy compressors and panels, and cold exposure during commissioning. This SWMS addresses the specific safety requirements for refrigeration installation in accordance with Australian WHS legislation, pressure equipment regulations, electrical safety standards, and refrigerant handling requirements.

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Overview

What this SWMS covers

Refrigeration system installation encompasses the complete installation of commercial and industrial cooling systems from initial equipment delivery through to commissioning and handover. Projects range from small display cabinet installations in retail environments through to large-scale central refrigeration plants serving supermarkets, food processing facilities, and cold storage warehouses. The work integrates mechanical refrigeration equipment, copper and steel pipework, electrical power and control systems, insulation materials, and building penetrations requiring coordination with other construction trades. Typical refrigeration installations include walk-in cool rooms and freezers with insulated panel construction and refrigeration equipment, supermarket refrigeration systems with multiple display cabinets connected to centralised condensing units, process cooling for food manufacturing or pharmaceutical production, and cold storage facilities maintaining precise temperature control for perishable goods. System capacities range from fractional kilowatt domestic-scale units through to multi-megawatt industrial refrigeration plants. Refrigerants used include synthetic HFCs (R404A, R134a, R407C), low-GWP alternatives (R1234yf, R513A), natural refrigerants including ammonia (R717) for industrial plants, and carbon dioxide (R744) for commercial applications. Physical installation work involves positioning and securing condensing units weighing 100kg to over 1000kg often on rooftop locations requiring crane lifts and structural support verification. Evaporator units install inside cool rooms or above display cabinets requiring electrical connections and refrigerant line terminations. Copper refrigerant pipework runs from condensing units to evaporators with insulation covering preventing condensation and heat gain. Brazing joins copper pipes requiring hot work permits and fire watch procedures. Electrical work connects high-power equipment (compressors drawing up to 200 amps) requiring appropriately rated switchgear, motor protection, and earthing systems. Control systems integrate temperature sensors, pressure switches, defrost controls, and building management system interfaces. Installation typically occurs during building construction or as retrofit work in operating facilities. New construction allows coordinated installation with building trades while retrofit work must minimise disruption to ongoing operations. Temperature-sensitive facilities like hospitals or pharmaceutical storage require temporary cooling during installation. Commissioning involves charging systems with refrigerant, testing all controls and safeties, achieving design temperatures, and documenting system performance. Post-installation includes operator training, documentation handover, and ongoing maintenance planning.

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Why this SWMS matters

Refrigeration installation presents multiple serious hazards requiring comprehensive safety management. Work at heights installing rooftop condensing units creates fall risks particularly when using cranes to position heavy equipment on roof structures. The 2017 incident where a refrigeration technician fell 8 metres from a roof while disconnecting a condensing unit demonstrates the need for edge protection, fall arrest systems, and safe crane operation procedures. Condensing units on roofs also create overhead power line hazards if equipment swings toward lines during crane lifts. Strict lift planning, safe approach distances, and spotters are mandatory controls. Under the Work Health and Safety Act 2011, refrigeration work triggers high-risk construction work requirements including mandatory SWMS for work at heights, confined spaces, and electrical installations. Pressure equipment regulations apply to refrigeration systems containing refrigerant at pressures exceeding 50kPa requiring pressure vessel registration for large systems, pressure testing before commissioning, and documented operating procedures for high-pressure refrigeration plants. Electrical safety legislation requires licensed electrical workers for all electrical connection work, isolation procedures for work on energised equipment, and arc flash hazard assessments for high-power installations. Confined space hazards occur during cool room construction and commissioning when technicians enter partially completed cool rooms for internal equipment installation or initial startup procedures. Cool rooms create confined space conditions through limited entry points, poor natural ventilation, and potential for refrigerant accumulation if leaks occur. Fatal incidents have occurred when refrigerant leaked into occupied cool rooms causing rapid asphyxiation. The 2019 case where a technician died in a cool room after R404A refrigerant leaked from a damaged pipe joint highlights the need for atmospheric testing, forced ventilation, and emergency rescue procedures before and during cool room entry. Manual handling injuries are prevalent in refrigeration installation due to heavy equipment handling including compressors, condensers, evaporators, and insulated panels weighing 30-200kg. Technicians work in awkward positions installing equipment in confined machinery spaces, on roofs with limited access, and inside cool rooms where low temperatures compound manual handling strain. Chronic back injuries, shoulder damage, and knee injuries result from poor manual handling techniques and inadequate mechanical aids. Proper SWMS implementation mandates team lifting, mechanical lifting equipment, and task planning to minimise manual handling risks.

Reinforce licensing, insurance, and regulator expectations for Refrigeration Safe Work Method Statement crews before they mobilise.

Hazard identification

Surface the critical risks tied to this work scope and communicate them to every worker.

Risk register

Falls from Heights During Rooftop Equipment Installation

High

Condensing units and refrigeration equipment frequently install on building rooftops requiring work at heights exceeding 2 metres. Technicians position equipment near roof edges creating fall risks particularly when guiding crane-lifted loads. Fragile roof materials including fibreglass skylights, corrugated roofing, and deteriorated roof sheets present fall-through hazards. Working near roof edges while connecting refrigerant lines, electrical cables, and supports creates overbalancing risks. Accessing roofs via ladders, particularly when carrying tools or materials, presents fall hazards during transition from ladder to roof surface.

Consequence: Fatal injuries from falls exceeding 3 metres height, traumatic brain injuries and spinal cord damage causing permanent disability, multiple fractures requiring extended hospitalisation, and death if falls occur through fragile roof materials onto concrete floors or equipment below. Secondary injuries occur if workers fall onto operating machinery or building equipment.

Confined Space Asphyxiation in Cool Rooms During Construction

High

Cool room and freezer construction creates confined spaces when partially completed rooms have insulated walls installed but ventilation systems are not yet operating. Technicians enter these spaces to install internal evaporators, lights, shelving, and controls before completion. Refrigerant leaks from pipe joints, valve packings, or damaged lines during pressure testing accumulate in confined cool rooms displacing oxygen. Cool rooms have limited entry points (single door), inadequate natural ventilation, and potential for oxygen displacement if refrigerant leaks. Workers may not recognise confined space conditions until oxygen depletion causes rapid unconsciousness.

Consequence: Rapid asphyxiation and death if oxygen levels drop below 16%, brain damage from hypoxia if rescue is delayed, multiple fatalities if rescue workers enter without breathing apparatus, and long-term neurological effects in survivors. Cold stress compounds asphyxiation effects as cold reduces tolerance to oxygen deficiency.

High-Pressure Refrigerant Line Failures

High

Refrigerant pipework operates at pressures ranging from 1000kPa to 3000kPa on high-pressure sides requiring robust brazing, correct material selection, and pressure testing before commissioning. Brazing defects including incomplete penetration, contamination, or overheating cause joint failures under pressure. Using incorrect copper pipe specifications (insufficient wall thickness for operating pressure) causes pipe rupture. Pressure testing with compressed air or nitrogen at pressures exceeding component ratings ruptures weak points. Mechanical damage during installation crushes or kinks pipes creating failure points under pressure.

Consequence: Explosive refrigerant release causing cold burns from liquid refrigerant spray, asphyxiation in confined spaces from massive refrigerant release, impact injuries from failed components, equipment damage from uncontrolled refrigerant loss, environmental violations from large refrigerant releases, and fire if flammable refrigerants contact ignition sources during release.

Electrical Shock from High-Power Refrigeration Equipment

High

Commercial refrigeration compressors draw substantial electrical current (30-200 amps for commercial systems) requiring high-power electrical connections. Three-phase power at 415V supplies most commercial systems creating electrocution risks from exposed terminals, damaged cables, and incorrect wiring. Compressor motors with damaged insulation create chassis electrification risks. Working on energised electrical equipment during commissioning and troubleshooting exposes technicians to electrical contact. Condensation in electrical enclosures creates tracking paths for electrical current. Inadequate earthing of equipment frames creates shock risks from induced voltages.

Consequence: Electrocution causing cardiac arrest and death, severe electrical burns requiring extensive treatment and skin grafts, arc flash injuries causing vision loss and disfigurement, falls from heights triggered by electric shock when working on rooftop equipment, and fire if electrical faults ignite combustible materials or refrigerant releases.

Manual Handling Injuries from Heavy Equipment Installation

Medium

Refrigeration equipment installation involves manual handling of compressors (50-300kg), condensers, evaporators (30-100kg), insulated panels (15-50kg each), refrigerant cylinders (60kg when full), and copper pipe coils. Equipment installs in confined machinery spaces, on rooftops with limited access, and inside cool rooms where cold temperatures reduce grip strength and increase muscle strain. Awkward working positions installing wall-mounted evaporators above shoulder height, positioning floor-mounted equipment in tight spaces, and carrying panels up ladders create musculoskeletal injury risks.

Consequence: Chronic lower back pain and disc degeneration from repeated heavy lifting, shoulder injuries including rotator cuff tears, hernias from excessive load handling, knee damage from kneeling and squatting in confined spaces, hand and finger injuries from crushing between heavy equipment and structures, and long-term musculoskeletal disorders requiring ongoing treatment and potential permanent disability.

Toxic Fume Exposure During Brazing Operations

Medium

Brazing copper refrigerant lines creates metal fumes including copper oxide, zinc oxide from brass fittings, and cadmium from silver solder alloys. Brazing in confined spaces including cool rooms, machinery spaces, and ceiling cavities without adequate ventilation causes fume accumulation exceeding exposure limits. Heating refrigerant lines containing residual refrigerant creates highly toxic decomposition products including phosgene gas, hydrofluoric acid, and hydrochloric acid causing severe respiratory damage. Flux vapours irritate respiratory system and eyes. Prolonged brazing work without respiratory protection causes metal fume fever and chronic respiratory sensitisation.

Consequence: Metal fume fever causing flu-like symptoms, headaches, and lost work time, chemical pneumonitis requiring hospitalisation from exposure to refrigerant decomposition products, permanent lung damage reducing respiratory capacity, occupational asthma from chronic fume exposure, and acute respiratory distress requiring intensive care if severe exposures occur in confined spaces.

Cold Stress During Freezer Commissioning and Testing

Medium

Commissioning work requires technicians to enter operating freezers at temperatures ranging from -18°C to -30°C for extended periods testing controls, adjusting airflow, installing temperature sensors, and verifying design temperatures. Prolonged cold exposure causes hypothermia, reduced manual dexterity making tasks difficult and increasing injury risk, and cold-induced injuries including frostbite to extremities. Inadequate cold-weather clothing provides insufficient protection for extended work periods. Moving between warm and cold environments causes condensation on safety glasses obscuring vision.

Consequence: Hypothermia causing confusion, poor judgment, and potential unconsciousness if prolonged cold exposure occurs, frostbite to fingers, toes, and facial features requiring treatment and potential amputation in severe cases, reduced manual dexterity causing increased injury risk from tools or equipment, respiratory irritation from breathing very cold air, and slips and falls on ice accumulation inside freezers.

Control measures

Deploy layered controls aligned to the hierarchy of hazard management.

Implementation guide

Edge Protection and Fall Arrest Systems for Rooftop Work

Engineering Control

Install perimeter edge protection consisting of guardrails at minimum 1000mm height with midrails and toeboards preventing falls from roof edges. Where edge protection cannot be installed due to equipment positioning requirements, implement fall arrest systems with horizontal lifelines or fixed anchor points allowing workers to maintain continuous attachment. Provide roof access platforms or scaffolding for equipment positioning eliminating need for workers to operate near unprotected edges. Use mechanical equipment including trolleys or skates for moving heavy equipment across roofs reducing manual handling and fall risks.

Implementation

1. Survey roof perimeter before work commencement identifying all fall hazards including roof edges, skylights, penetrations, and fragile roof materials 2. Install temporary edge protection using freestanding guardrail systems or roof edge anchor brackets supporting guardrails at minimum 1000mm height with midrails at 500mm 3. Cover or barricade all roof penetrations and skylights using barriers rated for worker weight preventing fall-through - paint barriers bright colours for visibility 4. Install horizontal lifeline systems using engineered anchor points for areas where edge protection cannot be installed - lifelines must be designed by competent person with calculations verifying anchor capacity 5. Provide full-body harnesses with dual lanyards allowing 100% tie-off during position changes - ensure all workers are trained in harness use and fall arrest procedures 6. Establish designated access routes across roof marked with painted lines or bunting avoiding fragile roof areas and minimising time near edges 7. Use mechanical aids including roof trolleys, skates, or portable gantries for moving equipment eliminating manual carrying near edges 8. Implement exclusion zones at ground level beneath roof work areas preventing injury from dropped tools or materials - mark zones with barrier tape and signage

Atmospheric Testing and Forced Ventilation for Cool Room Entry

Engineering Control

Classify all cool room entries during construction and commissioning as confined space work requiring atmospheric testing before and continuous monitoring during entry. Test for oxygen levels (must be 19.5%-23.5%), refrigerant presence, and toxic gases before allowing entry. Establish forced ventilation using portable fans positioned to remove refrigerant from low areas where it accumulates. Maintain continuous atmospheric monitoring with alarms alerting workers if oxygen drops or refrigerant is detected. Prohibit entry if unsafe atmosphere is detected until ventilation restores safe conditions.

Implementation

1. Calibrate multi-gas atmospheric monitor within 24 hours of use - verify oxygen sensor, refrigerant sensor (if available), and alarm functions using calibration gas 2. Sample atmosphere at multiple heights before entry - refrigerants accumulate at floor level requiring low-level sampling in addition to breathing zone testing 3. Verify oxygen level is between 19.5% and 23.5% - do not permit entry if oxygen is outside this range 4. Install forced ventilation using portable fans at floor level exhausting to building exterior - position intake in high areas and exhaust at low areas creating airflow removing refrigerants from floor level 5. Maintain minimum 6 air changes per hour during cool room entry - calculate air changes by dividing fan capacity by cool room volume 6. Assign observer outside cool room maintaining visual contact with entrant and monitoring atmospheric detector readings continuously 7. Provide communication equipment (radios or mobile phones) allowing entrant to request immediate extraction if conditions change 8. Establish rescue procedures including rescue equipment located outside cool room and trained rescue personnel available - never enter for rescue without breathing apparatus 9. Prohibit entry during pressure testing of refrigerant lines when leak risk is highest - complete pressure tests before allowing personnel entry

Pressure Testing and Leak Detection Before Refrigerant Charging

Administrative Control

Implement mandatory pressure testing of completed refrigerant pipework before charging with refrigerant. Pressure test with dry nitrogen to 1.5 times operating pressure for minimum 24 hours verifying no pressure loss indicating leaks. Use electronic leak detectors and soap bubble testing to identify leak locations. Repair all leaks before evacuating and charging system. Never pressure test with compressed air which contains moisture causing internal corrosion and ice formation. Document pressure test results including initial pressure, final pressure, duration, and leak repair records.

Implementation

1. Complete all brazing joints and install all system components before pressure testing - verify all joints are cooled and flux residue is removed 2. Isolate system from atmosphere using service valves or temporary caps on all openings 3. Connect nitrogen cylinder with pressure regulator to system - use only dry nitrogen, never compressed air or oxygen which creates explosion risks 4. Pressurise system gradually to test pressure calculated as 1.5 times maximum operating pressure (typically 2500-3000kPa for high-pressure side, 1500kPa for low-pressure side) 5. Monitor pressure on calibrated gauge for minimum 24 hours - document initial pressure, periodic readings, and final pressure after hold period 6. If pressure drops more than 5%, leak exists requiring location and repair - use electronic leak detector scanning all joints, connections, and potential leak points 7. Apply soap bubble solution to suspected leak areas - bubbles indicate leak presence and severity 8. Repair leaks by draining nitrogen, re-brazing defective joints, tightening mechanical connections, or replacing damaged components 9. Repeat pressure test after leak repairs verifying system holds pressure for full 24-hour period 10. Document pressure test results including pressures, duration, leak locations found, repairs performed, and final test verification

Electrical Isolation and Lockout for Installation Work

Elimination

Eliminate electrical hazards during installation and commissioning by implementing isolation and lockout procedures. All electrical work must be performed by licensed electrical workers. Verify isolation using test equipment before touching electrical components. Install lockout devices preventing re-energisation during work. Apply personal danger tags identifying workers and prohibition against energisation. Implement energisation procedures requiring supervisor verification and worker notification before applying power during commissioning.

Implementation

1. Identify all electrical supply circuits to refrigeration equipment - verify circuit breaker or isolator locations controlling power to compressors, condensers, evaporators, and control circuits 2. Isolate electrical supply at switchboard or local isolator turning circuit to off position 3. Apply personal lockout device (padlock) to isolation point preventing switch or breaker movement to on position - each worker applies individual lockout device 4. Attach personal danger tag to lockout device identifying worker name, date, time, and work being performed - tags must state 'DANGER - DO NOT OPERATE' 5. Test for absence of electrical supply using appropriately rated voltage tester at equipment terminals - verify all phases are dead before touching conductors 6. Install temporary earthing if working on high-voltage equipment (not typical for commercial refrigeration but required for large industrial plants) 7. During commissioning when energisation is required, implement controlled energisation procedure requiring supervisor approval and notification to all workers that power will be applied 8. Verify no workers are in contact with equipment before energising - visual inspection and verbal confirmation from all personnel 9. Remove lockout devices only after work is complete and worker has moved clear of equipment - never remove another worker's lockout 10. Document isolation and energisation activities including circuits isolated, lockout device numbers, workers involved, and energisation authorisation

Mechanical Lifting Aids and Team Lifting Procedures

Engineering Control

Provide mechanical lifting equipment including portable gantries, engine cranes, trolleys, and material hoists for moving heavy refrigeration equipment. Implement mandatory team lifting for components exceeding 15kg individual capacity. Plan work sequences minimising manual handling distances and repetitions. Use equipment with lifting points or attach lifting straps to balanced load points. Position equipment to minimise carrying distances from delivery point to installation location. Schedule adequate personnel for installation tasks ensuring helpers are available for heavy lifts.

Implementation

1. Assess all equipment weights before delivery - compressors, condensers, evaporators, and panels exceeding 15kg require mechanical aids or team lifting 2. Provide portable engine crane (cherry picker) rated to 500kg minimum for positioning compressors and condensers - verify crane capacity exceeds equipment weight 3. Use material trolleys or wheeled equipment stands for moving equipment across flat surfaces - reduces carrying and allows single-person equipment movement for moderate weights 4. Install equipment on roofs using building crane or mobile crane for lifts - never manually carry equipment weighing over 30kg up ladders or stairs 5. Assign minimum two workers for all equipment weighing 15-50kg - workers must coordinate lift using verbal signals ('Ready, Lift, Move') 6. Use proper lifting technique maintaining neutral spine position, bending knees not back, keeping load close to body, and avoiding twisting during lift 7. Plan installation sequence to minimise manual handling distance - position equipment as close as practical to final installation location before manual positioning 8. Provide lifting straps or slings for equipment without integral handles - attach straps at balanced points preventing load tilting during lift 9. Schedule regular breaks during manual handling tasks - avoid continuous manual handling exceeding 30 minutes without rest period 10. Rotate workers between manual handling tasks and other duties reducing individual worker exposure to repetitive strain

Forced Ventilation and Respiratory Protection for Brazing

Engineering Control

Provide local exhaust ventilation during all brazing operations extracting fumes from worker breathing zones. Position extraction hoods or flexible extraction arms within 300mm of brazing point drawing fumes away from faces. Use low-temperature silver brazing alloys eliminating cadmium exposure from high-temperature alloys. Evacuate refrigerant lines completely before brazing eliminating toxic decomposition products from residual refrigerant heating. Provide respiratory protection rated for metal fumes when ventilation cannot achieve adequate extraction. Prohibit brazing in confined spaces without adequate extraction and respiratory protection.

Implementation

1. Provide portable fume extractor with flexible extraction arm for brazing work - position hood within 300mm of brazing point and activate before igniting torch 2. Direct extracted fumes to building exterior through temporary ducting - never exhaust into occupied spaces or return them to work area 3. Use silver brazing alloys rated for copper refrigerant pipe joining - select alloys with minimum 5% silver content and zero cadmium eliminating toxic cadmium fumes 4. Evacuate all refrigerant from pipe sections before brazing using recovery equipment - verify evacuation is complete using leak detector confirming zero refrigerant at brazing locations 5. Purge pipes with dry nitrogen during brazing preventing internal oxidation and ensuring any residual refrigerant vapours are expelled away from heat 6. Provide P2 respirators rated for metal fumes when brazing in locations where extraction cannot be positioned effectively - fit-test respirators to individual workers 7. Monitor air quality in confined brazing areas - if metal fume odour is detected or visibility is reduced by fumes, increase extraction or cease work until ventilation is adequate 8. Limit continuous brazing periods to 20 minutes in confined spaces - take breaks in fresh air allowing respiratory recovery 9. Schedule brazing work during periods when adequate natural ventilation supplements mechanical extraction - avoid brazing in sealed enclosures 10. Inspect extraction equipment before each use - verify fans operate, filters are clean, and ducting has no leaks reducing extraction efficiency

Personal Protective Equipment for Refrigeration Installation

Personal Protective Equipment

Provide task-specific PPE including safety glasses for all installation work, face shields for brazing operations, cut-resistant gloves for handling sharp-edged sheet metal and copper pipe, insulated gloves for handling cold components during commissioning, safety boots with electrical hazard rating, and high-visibility clothing for work in construction areas. Cold-weather clothing including insulated jackets and thermal gloves required for extended work in freezers. Hard hats mandatory on construction sites. Hearing protection for work near operating compressors and in noisy construction environments.

Implementation

1. Issue safety glasses with side shields meeting AS/NZS 1337 for all refrigeration work - mandatory even when performing non-hazardous tasks to establish consistent safety culture 2. Provide flip-up welding face shields rated for brazing (shade 3-5) when performing brazing operations - allows face protection while maintaining visibility between brazing tasks 3. Supply cut-resistant gloves rated Level 3 per AS/NZS 2161.4 for handling copper pipe, sheet metal panels, and components with sharp edges 4. Provide insulated gloves rated to -30°C for handling components in operating freezers during commissioning - prevents frostbite from touching cold surfaces 5. Issue safety boots with steel toe caps meeting AS/NZS 2210.3 with electrical hazard rating providing secondary protection against electrical contact 6. Require high-visibility vests meeting Class D requirements for work in active construction sites ensuring visibility to mobile plant operators and other trades 7. Provide insulated work jackets and thermal inner gloves for technicians entering operating freezers - clothing must be adequate for temperatures and work duration (maximum 15 minutes exposure without warming break) 8. Issue hard hats meeting AS/NZS 1801 for all work on construction sites - mandatory even when working inside buildings if overhead work by other trades is occurring 9. Supply Class 3 hearing protection (AS/NZS 1270) for work near operating compressors or in noisy construction environments exceeding 85dB(A) 10. Inspect all PPE before issue and enforce replacement when damaged - maintain PPE register documenting issue dates and replacement schedules

Download complete control procedures

Personal protective equipment

Requirement: AS/NZS 1337 medium impact rating with side protection

When: Throughout all refrigeration installation activities including equipment positioning, pipework installation, and electrical connection work

Requirement: Shade 3-5 rating with flip-up capability

When: During all brazing operations joining copper refrigerant lines and installing system components requiring hot work

Requirement: Level 3 cut resistance per AS/NZS 2161.4

When: When handling copper pipe with sharp cut ends, sheet metal panels, and equipment components with sharp edges or corners

Requirement: Rated to minimum -30°C temperature protection

When: When entering operating freezers during commissioning, testing, or adjustment work where contact with cold surfaces or components is possible

Requirement: Steel toe caps per AS/NZS 2210.3 with electrical hazard protection

When: Throughout all refrigeration installation activities for protection against dropped equipment and secondary electrical hazard protection

Requirement: Class D per AS/NZS 4602.1

When: When working on active construction sites, in machinery spaces with mobile equipment, or on rooftops where visibility to crane operators and other workers is required

Requirement: Rated for prolonged exposure to -30°C environments

When: During commissioning work requiring entry to operating freezers for extended periods exceeding 10 minutes

Requirement: AS/NZS 1801 impact and penetration protection

When: On construction sites where overhead work by other trades creates falling object hazards, and during equipment lifting operations where overhead loads are present

Requirement: Class 3 protection per AS/NZS 1270

When: When working near operating compressors, in machinery spaces with multiple operating units, or construction environments exceeding 85dB(A)

Inspections & checks

Before work starts

✓Verify refrigeration equipment delivery is complete checking all components against delivery schedule - compressors, condensers, evaporators, controls, and accessories
✓Inspect delivered equipment for shipping damage including dents, refrigerant leaks, electrical damage, or missing components - document and report damage before signing delivery documentation
✓Review building drawings and refrigeration system design identifying equipment locations, pipework routes, electrical connection points, and penetration locations
✓Verify electrical supply is adequate for refrigeration equipment loads - check main switchboard capacity and verify circuit protection is correctly sized for compressor starting currents
✓Assess rooftop access and structural capacity if condensing units install on roof - verify roof structure can support equipment loads and identify safe access routes
✓Check brazing equipment serviceability including torch condition, hose integrity, regulator function, and cylinder pressures - verify gas cylinders are secured and in date
✓Inspect refrigerant recovery equipment and leak detectors - calibrate leak detector using calibration gas and verify recovery machine certification is current
✓Verify fall protection equipment is available if rooftop work is required - check harnesses, lanyards, anchor points, and edge protection systems are serviceable
✓Confirm ARCtick refrigerant handling licences are current for all technicians performing refrigerant work - check licence cards and verify expiry dates
✓Assess confined space hazards if cool room entry will be required - verify atmospheric testing equipment is calibrated and rescue equipment is available

During work

✓Monitor workers using fall protection on rooftops - verify harnesses are worn correctly, lanyards are attached to approved anchors, and edge protection remains in place
✓Check refrigerant pipework installation quality - verify copper pipes are supported adequately, bends are not kinked, and brazing joints show proper penetration and fillet formation
✓Verify nitrogen purge flow is maintained during brazing operations - check regulator pressure and confirm nitrogen flow at joint location prevents internal oxidation
✓Monitor atmospheric conditions if work occurs in cool rooms or confined spaces - verify oxygen levels remain above 19.5% and forced ventilation operates continuously
✓Inspect electrical installation progress - verify cable sizing is correct for load, terminations are tight and properly insulated, and earthing connections are secure
✓Check insulation installation on refrigerant lines - verify vapour barrier is continuous without gaps and insulation thickness matches specifications for temperature and location
✓Monitor equipment positioning on roofs - verify structural supports are adequate, equipment is level and secure, and vibration isolation mounts are correctly installed
✓Verify pressure testing procedures are followed correctly - check test pressures, gauge accuracy, and duration compliance with specifications
✓Inspect brazing work quality during installation - check for proper filler metal flow, complete joint penetration, and absence of blow holes or contamination
✓Monitor manual handling activities - intervene if unsafe lifting techniques are observed and ensure mechanical aids are used for heavy equipment

After work

✓Verify refrigerant pipework pressure test results - confirm system held test pressure for required duration with no pressure loss indicating leaks
✓Inspect all brazing joints after completion - use leak detector confirming zero refrigerant leaks at all connections and joints before charging system
✓Check electrical installation is complete - verify all connections are terminated, cable is secured properly, and electrical enclosures are closed and sealed
✓Confirm insulation installation is complete on all refrigerant lines - verify vapour barrier is sealed at all penetrations and insulation has no gaps
✓Verify refrigerant charge quantities - confirm system is charged to manufacturer specifications and refrigerant log documents type and quantity charged
✓Test system operation at design conditions - verify temperatures reach specifications, controls function correctly, and no abnormal sounds or vibrations exist
✓Document commissioning test results including operating pressures, temperatures, superheat, subcool, electrical current draws, and any adjustments made
✓Photograph completed installation - capture equipment positioning, pipework routes, electrical connections, and overall system layout for project records
✓Verify all access panels, doors, and covers are installed and secured - check cool room doors seal correctly and safety releases function from inside
✓Clean work area removing all installation debris, packaging materials, and unused components - dispose of waste appropriately including refrigerant-contaminated materials
✓Complete handover documentation including operating manuals, as-built drawings, refrigerant logs, electrical schematics, and warranty information for customer

Step-by-step work procedure

Give supervisors and crews a clear, auditable sequence for the task.

Field ready

Pre-Installation Planning and Site Assessment

Review complete refrigeration system design including equipment schedules, pipework layouts, electrical schematics, and control sequences. Verify equipment delivery schedule coordinating with construction program to ensure installation sequence aligns with building completion. Assess site conditions identifying equipment locations, access routes for delivery, rigging points for heavy equipment lifts, and temporary storage areas for components. Review building structure verifying roof capacity for condensing unit loads if rooftop installation is specified - engage structural engineer if capacity is uncertain. Identify electrical supply location and verify circuit capacity is adequate for refrigeration equipment loads including compressor starting currents which can be 6-8 times running current. Coordinate with other trades including builders completing cool room panels, electricians installing power supply, and plumbers if water-cooled condensers require water connections. Develop installation sequence plan identifying critical path activities and dependencies. Prepare risk assessment for installation identifying confined space hazards in cool rooms, work at heights for rooftop equipment, manual handling risks for heavy components, and electrical hazards from high-power connections. Obtain all required permits including hot work permits for brazing, confined space entry permits for cool room work, and roof access permits if building is occupied.

Safety considerations

Never commence installation without approved risk assessment and required permits in place. Confined space hazards in partially completed cool rooms have caused multiple fatalities - treat all cool room entries as confined space work until ventilation is verified adequate. Verify structural capacity before installing rooftop equipment - roof failures have occurred when equipment exceeded design loads. Coordinate with other trades to prevent conflicts - simultaneous work in same areas increases incident risk. Review emergency procedures including rescue plans for workers at heights or in confined spaces before commencing work.

Equipment Delivery and Positioning

Coordinate equipment delivery with crane availability if rooftop installations require lifting. Inspect all delivered equipment immediately upon arrival checking for shipping damage, refrigerant leaks, missing components, or incorrect specifications. Document any damage with photographs and notify suppliers before signing delivery documentation. Position compressor racks, condensing units, or central plant equipment in designated machinery spaces using forklifts or pallet jacks for equipment on ground level. For rooftop condensing units, develop lift plan calculating equipment weights, determining rigging methods, identifying crane position and outrigger placement, and establishing exclusion zones beneath lifts. Position crane ensuring adequate reach to lift location while maintaining safe approach distances to overhead power lines (minimum 3 metres for voltages up to 33kV). Attach lifting slings to equipment using designated lift points or balanced rigging configuration preventing load tilting. Perform test lift raising equipment 300mm and inspecting rigging before proceeding with full lift to roof. Guide equipment during lift using tag lines preventing swing and contact with building structure. Position equipment on roof structural members capable of supporting loads - verify equipment placement matches structural drawings showing beam locations. Install vibration isolation mounts between equipment and structural supports preventing vibration transmission to building. Secure equipment against wind loads and seismic movement using appropriate fixings into structural members.

Safety considerations

Maintain exclusion zones beneath all suspended loads - no personnel access during lifting operations. Verify overhead clearances to power lines before positioning crane - electricity can arc across air gaps causing electrocution. Use tag lines controlling equipment swing during lifts - never allow loads to swing freely. Verify roof structural capacity before placing equipment - inadequate support has caused equipment to fall through roofs. Install edge protection or barriers before allowing workers on roof to secure equipment. Wear hard hats during lifting operations protecting against dropped tools or fasteners. Never work beneath suspended loads even briefly.

Refrigerant Pipework Installation and Brazing

Measure and cut copper refrigerant pipe to required lengths using tube cutters producing square cuts without burrs. Deburr pipe ends removing internal and external burrs preventing copper particles contaminating refrigerant system. Install pipe supports at maximum 2 metre spacing for horizontal runs and 3 metre spacing for vertical runs preventing pipe sagging under weight and vibration. Route pipework following design drawings maintaining separation from electrical cables, hot water pipes, and structural elements causing vibration transmission. Prepare pipe ends for brazing by cleaning with emery cloth or abrasive pad removing oxidation for 50mm from pipe end. Apply flux sparingly to male pipe end only - excess flux contaminates refrigerant oil. Assemble joints ensuring pipe bottoms in fitting socket with full engagement. Purge pipe interior with dry nitrogen at 2-5kPa flow rate before and during brazing preventing internal oxidation. Light brazing torch and heat joint using circular motion distributing heat evenly around fitting. Apply filler rod when joint reaches working temperature indicated by flux color change - filler should flow into joint by capillary action without overheating causing fitting distortion. Maintain nitrogen purge during cooling preventing internal oxidation forming scale. Inspect completed joints verifying 360-degree filler coverage and proper fillet formation. Install flare fittings or compression fittings at equipment connections allowing disconnection for service. Support pipework near equipment connections preventing vibration transfer and stress on fittings.

Safety considerations

Never braze pipes containing refrigerant - evacuate completely before applying heat to prevent toxic decomposition products. Maintain nitrogen purge during brazing preventing internal oxidation and ensuring any residual refrigerant vapours are expelled. Wear face shield rated for brazing protecting eyes and face from UV radiation and molten metal spatter. Provide local exhaust ventilation extracting brazing fumes from breathing zone - metal fume exposure causes respiratory damage. Never use compressed air for purging - moisture content causes internal corrosion and ice formation in system. Implement hot work permit procedures including fire watch during and 30 minutes after brazing completion. Keep fire extinguisher within 3 metres of brazing location. Check for combustible materials near brazing - remove or protect with flame-resistant blankets.

Evaporator Installation in Cool Rooms

Before entering cool room, test atmosphere using calibrated gas detector verifying oxygen levels are 19.5%-23.5% and no refrigerant is present from previous work. Establish forced ventilation using portable fans if cool room is enclosed and natural ventilation is inadequate. Position evaporator units on ceiling or wall mounting brackets ensuring adequate clearance for airflow - minimum 600mm clearance to stored product and 150mm clearance to walls. Install structural supports capable of supporting evaporator weight plus ice accumulation during operation. Secure evaporators using vibration isolation mounts preventing noise transmission to building structure. Connect evaporator coil to refrigerant lines using brazing for permanent connections or flare fittings allowing disconnection. Install expansion valve or electronic expansion device controlling refrigerant flow to evaporator - mount valve on liquid line near evaporator ensuring proper orientation. Install temperature sensors in return air stream monitoring air temperature for control system. Connect defrost heaters or hot gas defrost lines for evaporators operating below 0°C requiring periodic defrost. Install condensate drain lines with trap and heater preventing freeze-up - drain lines must pitch continuously to drain outlet preventing water pooling. Wire evaporator fan motors and defrost heaters to control panel using appropriately rated cable - verify electrical connections are correct before energising. Install evaporator fan guards or grilles preventing accidental contact with rotating fans.

Safety considerations

Treat all cool room entries as confined space work - test atmosphere before entry and maintain forced ventilation during work. Never enter cool room alone - maintain communication with personnel outside who can summon rescue if needed. Refrigerant leaks in cool rooms create rapid asphyxiation risk - evacuate immediately if refrigerant odour is detected or atmospheric monitor alarms. Work at heights installing ceiling-mounted evaporators requires proper access equipment - use platforms or stepladders, never stand on stored product or unstable surfaces. Verify electrical supply is isolated before making electrical connections - test for absence of voltage before touching conductors. Cool room temperatures during commissioning create cold stress - limit exposure time and wear adequate insulated clothing.

Electrical Connection and Control System Integration

All electrical work must be performed by licensed electrical workers holding appropriate electrical licenses. Verify electrical supply is isolated at switchboard before commencing electrical connection work - test for absence of voltage using appropriately rated voltage tester. Install motor circuit breakers or contactors rated for refrigeration compressor loads including locked rotor current during starting. Typical commercial compressor starting current is 6-8 times full load current requiring high-rupture-capacity circuit protection. Terminate power cables to compressor terminals ensuring correct phase sequence - incorrect phase rotation causes compressors to run backward damaging internal components. Install earth connections to all equipment frames using conductors sized per AS/NZS 3000 requirements - verify earth continuity using low-resistance ohmmeter. Connect control wiring from thermostats, pressure switches, and safety devices to control panel verifying all connections match control schematic. Install overload protection monitoring compressor motor current and shutting down on overcurrent conditions preventing motor burnout. Program electronic controllers or building management systems with operating parameters including set points, safety limits, and alarm conditions. Wire defrost timers or controllers initiating periodic defrost cycles for freezer evaporators. Install indicating lights or alarms signaling system operation, alarms, or faults to building operators. Label all electrical components, circuit breakers, and control connections identifying circuits and functions for maintenance personnel.

Safety considerations

Never perform electrical work without proper licensing - unlicensed electrical work violates electrical safety legislation and creates serious electrocution risks. Verify isolation using test equipment before touching electrical conductors - never assume circuits are dead. Apply personal lockout devices to isolation points preventing re-energisation during work. High-power refrigeration equipment creates arc flash risks during faults - maintain appropriate safe approach distances and use arc-rated PPE for work on energised equipment. Verify correct motor rotation before connecting refrigerant lines - incorrect rotation damages compressors requiring replacement. Three-phase equipment can still be energised if one phase is disconnected - test all phases before assuming circuits are safe to touch.

Pressure Testing and Leak Detection

After completing all refrigerant pipework connections and before charging with refrigerant, pressure test system verifying all joints are leak-free. Connect nitrogen cylinder with pressure regulator to system service ports. Close all valves isolating system from atmosphere. Pressurise system gradually using dry nitrogen to test pressure calculated as 1.5 times maximum operating pressure - typically 2500-3000kPa for high-pressure side and 1500kPa for low-pressure side. Monitor pressure using calibrated gauge documenting initial pressure and recording periodic readings over 24-hour test period. If pressure drops more than 5% during hold period, leak exists requiring location and repair. Use electronic refrigerant leak detector scanning all brazed joints, mechanical connections, valve stems, and potential leak locations. Apply soap bubble solution to suspected leak areas - bubbles indicate refrigerant escape. Mark all leak locations for repair. Relieve nitrogen pressure and repair leaks by re-brazing joints, tightening fittings, or replacing defective components. Repeat pressure test after repairs verifying system holds pressure for complete 24-hour period with less than 5% pressure loss. Document pressure test results including test pressure, duration, leak locations found, repairs performed, and final test verification. Photograph pressure gauge readings at start and completion of test providing evidence of successful pressure testing.

Safety considerations

Never use compressed air for pressure testing - moisture content causes internal system damage and creates explosion risks when mixed with refrigerant oils. Never exceed equipment maximum working pressure during testing - excessive pressure ruptures weak components causing injuries from refrigerant spray. Use only dry nitrogen for pressure testing - oxygen creates explosion risk and moisture-bearing gases cause internal corrosion. Verify all gauges are calibrated and appropriate for test pressures being used. Maintain exclusion zone during pressure testing - component failures under pressure create projectile risks. Never apply heat to pressurised systems attempting to increase pressure - heating creates dangerous overpressure conditions. Relieve pressure gradually using regulators - rapid depressurisation can damage gauges and create loud noise startling workers.

System Evacuation, Charging, and Commissioning

After successful pressure test, evacuate system to deep vacuum removing air and moisture before charging with refrigerant. Connect vacuum pump to system service ports using appropriate hoses and manifold gauge set. Start vacuum pump and monitor system pressure on compound gauge reading in microns or kPa absolute. Evacuate to minimum 500 microns (0.067kPa) absolute pressure - deeper vacuum may be required for large systems or critical applications. Maintain vacuum for minimum 15 minutes after target pressure is reached allowing moisture evaporation. Monitor vacuum during hold period - if pressure rises significantly it indicates moisture remains requiring continued evacuation. After successful evacuation verified by pressure holding steady, charge system with refrigerant. Weigh refrigerant cylinder on electronic scales recording initial weight. Connect refrigerant cylinder to manifold centre port and open cylinder valve. For vapour charging, keep cylinder upright allowing refrigerant vapour to enter system high-pressure side. Monitor cylinder weight adding refrigerant until specified charge quantity is reached per system nameplate. Start system and monitor operating pressures and temperatures. Adjust refrigerant charge as needed achieving correct superheat (5-15°C typically) and subcool (5-15°C typically). Verify system achieves design temperatures within specified time periods. Test all controls including thermostats, defrost systems, and safety devices. Document commissioning results including operating pressures, temperatures, refrigerant quantities, and test results.

Safety considerations

Never use vacuum pump for refrigerant recovery - contaminates pump oil and releases refrigerant to atmosphere. Verify refrigerant type matches system specifications before charging - incorrect refrigerant creates dangerous pressures and environmental violations. Monitor system pressures during charging - cease charging if pressures approach maximum design pressures for components. Never overcharge systems - excessive refrigerant creates dangerous high pressures and reduces efficiency. Wear safety glasses during refrigerant charging as connections can leak causing cold refrigerant spray. Work in well-ventilated areas when charging systems - large refrigerant releases displace oxygen causing asphyxiation. Test system operation incrementally bringing loads online gradually - sudden loading can cause compressor damage. Maintain atmospheric monitoring if commissioning work occurs in cool rooms or plant rooms where refrigerant accumulation is possible.

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Frequently asked questions

What structural considerations apply to installing refrigeration condensing units on building roofs?

Rooftop refrigeration equipment creates significant structural loads requiring verification that roof structure can support equipment weight plus dynamic loads from operation and wind. Commercial condensing units weigh 100-500kg with larger industrial units exceeding 1000kg. Equipment must be positioned over primary structural members (beams or trusses) capable of supporting point loads - spreading loads between secondary structural members is inadequate and causes roof damage. Obtain structural drawings identifying beam locations and load capacities. Engage structural engineer to verify roof capacity if equipment weight approaches or exceeds design loads. Install equipment on structural steel frames or concrete pads distributing loads over multiple structural members if single point load capacity is inadequate. Consider wind loading particularly for tall equipment or locations with high wind exposure - equipment must be secured against overturning and sliding under design wind speeds. Account for seismic loading in seismic zones requiring additional securing and vibration isolation appropriate for seismic design category. Vibration isolation mounts must support equipment weight while allowing equipment movement during operation - verify mounts are rated for equipment weight and vibration frequencies. Consider access requirements for future maintenance - rooftop equipment must have safe access via fixed ladders or stairs, not portable ladders for routine service work.

How should refrigerant pipework be sized and installed to prevent system inefficiency and failures?

Refrigerant pipe sizing is critical for system efficiency and reliability - undersized pipes increase pressure drop reducing capacity and increasing compressor power consumption, while oversized pipes increase refrigerant charge quantities and system cost. Use manufacturer pipe sizing charts or refrigerant pipe sizing software calculating pipe diameters based on refrigerant type, system capacity, pipe length, and temperature difference. Typical velocity limits are 10-15 metres per second for suction lines, 15-20 m/s for hot gas lines, and 1-2 m/s for liquid lines. Install suction lines with continuous pitch toward compressor allowing oil return - minimum 1:100 pitch for horizontal runs with oil traps at low points in vertical risers ensuring oil return during low-load operation. Insulate suction lines preventing heat gain increasing compressor work and condensation causing water damage. Use closed-cell elastomeric insulation with vapour barrier preventing moisture ingress. Liquid lines generally do not require insulation except in high ambient temperature locations. Install expansion loops or flexible connectors accommodating thermal expansion and contraction - copper pipe expands approximately 1mm per metre for 50°C temperature change. Support pipework preventing vibration transmission to building structure - use vibration isolation hangers for horizontal runs and isolating clamps for vertical runs. Avoid mixing copper and steel components which create galvanic corrosion - use brass or bronze transition fittings if steel is required. Never install pipework in direct contact with building structure conducting vibration - isolate all contact points.

What confined space procedures are required for work inside cool rooms during installation and commissioning?

All cool room entries during construction and commissioning must be treated as confined space work requiring documented procedures, atmospheric testing, and rescue provisions. Cool rooms create confined space conditions through limited entry points (typically single door), potential for hazardous atmosphere from refrigerant leaks, and inadequate natural ventilation when doors are closed. Before entry, test atmosphere using calibrated multi-gas monitor measuring oxygen (must be 19.5%-23.5%), refrigerant presence, and toxic gases. Sample at floor level where refrigerants accumulate being heavier than air. Establish forced ventilation using portable fans positioned to create airflow removing refrigerants from floor level - maintain minimum 6 air changes per hour during work. Assign standby person outside cool room maintaining visual contact with entrant and monitoring atmospheric conditions continuously. Never allow lone working inside cool rooms during construction. Provide communication equipment (radios or phones) allowing immediate request for extraction if conditions change. Develop rescue procedures specific to cool room entry including rescue equipment (harnesses, retrieval lines, breathing apparatus) and trained rescue personnel available immediately. Never enter to perform rescue without self-contained breathing apparatus - multiple fatalities occur when rescuers enter oxygen-deficient atmospheres. During commissioning when cool room operates at temperature, implement time limits for continuous exposure - maximum 15 minutes at -18°C before warming break required. Provide insulated clothing adequate for temperature and work duration. Install emergency release mechanisms on all cool room doors allowing exit from inside if door becomes stuck or locked.

What electrical safety requirements apply to high-power refrigeration equipment installations?

Commercial refrigeration compressors draw substantial electrical current requiring licensed electrical workers for all electrical connection work. Three-phase compressors are standard for commercial systems operating at 415V with starting currents 6-8 times full load current (locked rotor current). Install motor circuit breakers or contactors rated for locked rotor current - standard circuit breakers are inadequate for refrigeration loads and cause nuisance tripping. Verify cable sizing accounts for voltage drop under starting conditions - excessive voltage drop prevents compressor starting and reduces motor life. Install overload protection monitoring all three phases and shutting down on overcurrent or phase loss conditions. Single-phase operation of three-phase compressors causes immediate motor damage. Verify correct phase sequence before connecting compressor - incorrect rotation runs compressor backward damaging internal components and preventing lubrication. Use phase rotation indicators or test equipment confirming correct phase sequence. Earth all equipment frames using conductors sized per AS/NZS 3000 requirements - verify earth continuity using low-resistance testing before energisation. Install residual current devices (RCDs) on single-phase equipment providing additional protection against earth faults. For installations in wet or outdoor locations, verify electrical equipment meets IP rating requirements for moisture protection - typically IP54 minimum for outdoor compressor terminals. Implement isolation and lockout procedures for all maintenance requiring licensed electrical workers to isolate, test, lock out, and tag circuits before work commences. Arc flash hazard assessments are required for high-power installations - determine incident energy levels and specify appropriate arc-rated PPE for work on energised equipment.

How should brazing work be performed safely to prevent toxic fume exposure and joint failures?

Safe brazing requires proper ventilation, evacuation of refrigerant, correct technique, and appropriate filler materials. Never braze pipes containing refrigerant - completely recover refrigerant using certified recovery equipment before applying heat. Residual refrigerant decomposes when heated forming highly toxic products including phosgene gas and hydrofluoric acid causing severe respiratory damage even from brief exposure. Purge pipes with dry nitrogen during brazing preventing internal oxidation and ensuring any residual refrigerant vapours are expelled - maintain 2-5kPa nitrogen flow through pipes throughout brazing and cooling. Provide local exhaust ventilation positioning flexible extraction arm within 300mm of brazing point removing metal fumes from breathing zone - copper oxide, zinc oxide from brass fittings, and cadmium from some silver solders are toxic requiring ventilation. Use low-temperature silver brazing alloys (5-15% silver content) appropriate for copper refrigerant pipe - avoid high-temperature alloys containing cadmium which produce extremely toxic fumes. Clean pipe ends thoroughly using emery cloth or abrasive pad removing oxidation for 50mm from end - apply flux sparingly to male end only as excess flux contaminates refrigerant oil. Heat joint evenly using circular torch motion distributing heat around fitting - apply filler rod when joint reaches working temperature indicated by flux colour change. Filler should flow by capillary action into joint - excessive heat causes fitting distortion and weak joints. Implement hot work permit procedures including fire watch for duration of brazing plus 30 minutes after completion. Position fire extinguisher within 3 metres of brazing location. Remove combustible materials or protect with flame-resistant blankets. Never braze in explosive atmospheres or near flammable refrigerants without special precautions.

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Refrigeration Safe Work Method Statement

What this SWMS covers

Why this SWMS matters

Hazard identification

Falls from Heights During Rooftop Equipment Installation

Confined Space Asphyxiation in Cool Rooms During Construction

High-Pressure Refrigerant Line Failures

Electrical Shock from High-Power Refrigeration Equipment

Manual Handling Injuries from Heavy Equipment Installation

Toxic Fume Exposure During Brazing Operations

Cold Stress During Freezer Commissioning and Testing

Control measures

Edge Protection and Fall Arrest Systems for Rooftop Work

Atmospheric Testing and Forced Ventilation for Cool Room Entry

Pressure Testing and Leak Detection Before Refrigerant Charging

Electrical Isolation and Lockout for Installation Work

Mechanical Lifting Aids and Team Lifting Procedures

Forced Ventilation and Respiratory Protection for Brazing

Personal Protective Equipment for Refrigeration Installation

Personal protective equipment

Inspections & checks

Before work starts

During work

After work

Step-by-step work procedure

Pre-Installation Planning and Site Assessment

Equipment Delivery and Positioning

Refrigerant Pipework Installation and Brazing

Evaporator Installation in Cool Rooms

Electrical Connection and Control System Integration

Pressure Testing and Leak Detection

System Evacuation, Charging, and Commissioning

Frequently asked questions

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