Cold Storage Commissioning Checklist
Commissioning is where a construction project becomes an operating asset. A structured commissioning plan catches 90% of issues before they become warranty claims.
Run commissioning in four phases: pre-commissioning (mechanical completion), cold commissioning (dry runs and pressure tests), hot commissioning (loaded operation) and handover. Sign off each phase before advancing.
Phase 1 — Pre-commissioning
Confirm mechanical and electrical completion. All utilities present. Panels installed and sealed. Piping pressure-tested and evacuated. Controls wired and powered.
- Civil works signed off (slab, drainage, seals)
- Panels installed to specification (thickness, joints, doors)
- Refrigeration piping pressure test at 1.1× design (nitrogen)
- Vacuum to <500 microns and hold test
- Electrical continuity, insulation and earth tests
- Controls wired and power-up verified
- Water treatment operational (if evaporative)
Phase 2 — Cold commissioning
Refrigerant charge and initial operation without product. Verify safeties, alarms and control loops respond correctly.
- Refrigerant charge to spec, weighed and recorded
- Compressor bump test then extended run
- High-pressure and low-pressure cut-out tested
- Oil pressure, oil level and oil temperature verified
- Condenser fan sequencing verified
- Defrost cycle initiated and completed successfully
- Alarms tested (over/under temperature, door open, power fail)
Phase 3 — Hot commissioning
Load the facility with product and operate at design conditions for 7–14 days. Measure and record everything.
- Cool-down curve to design temperature within contract time
- Steady-state temperature within tolerance across all zones
- Energy consumption vs guaranteed SEC (kWh/m³/day)
- Defrost frequency and duration monitored
- Refrigerant leak test after settling period
- Noise measurement at property boundary
- Data-logger records archived
Phase 4 — Handover
Documentation, training and warranty. This is the last chance to catch missing items.
- As-built drawings (mechanical, electrical, controls)
- O&M manuals in operator language
- Spare parts kit received and inventoried
- Operator training completed and signed off
- Warranty certificates issued
- Punch list closed or scheduled with dates
- Handover certificate signed by all parties
Copy this checklist into your project workspace
- Commissioning plan approved before site work starts
- Independent commissioning engineer nominated
- Test instruments calibrated with certificates
- Daily commissioning log maintained
- Deviations tracked with root cause and closure
- Handover certificate signed by owner, EPC and supplier
- Warranty and defect-liability period clocks start on handover
Frequently asked questions
How long does commissioning take?
For a 5,000 m³ cold storage: 2–3 weeks pre-commissioning, 1 week cold commissioning, 1–2 weeks hot commissioning, 1 week handover. Total 5–7 weeks — plan into the master schedule from day one.
Should I use an independent commissioning engineer?
For projects above USD 500K, yes. Independent engineers cost 1–3% of project value and typically save 5–15% by catching design and installation defects before handover.
When does warranty start?
On handover certificate signature, not on equipment delivery or first power-on. Verify this is stated clearly in the contract — otherwise you can lose 3–6 months of warranty coverage.