Cold store acceptance checklist for owners

This checklist is written for the investor, not for the contractor. The point is to let you check the things that matter without deep refrigeration expertise — you only need to know what to ask and where to look.

Before handover: preparation

• ☐ Signed design drawings and equipment list available for cross-checking
• ☐ Heat load calculation available, with its input parameters
• ☐ The staff who will operate the cold room are attending the handover
• ☐ An independent reference thermometer, not shared with the contractor
• ☐ Enough time booked — the test run takes several hours, do not rush handover into a single session

The fourth point matters more than it looks: every conclusion about temperature rests on the measuring device. If you only read the figure on the screen of the system that has just been installed, there is nothing to check it against.

Part 1 — Cold room envelope and doors

• ☐ Panels are the correct type and thickness per the contract — check labels and material documents
• ☐ Panel joints are tight, the cam-locks engage evenly, no visible gaps
• ☐ No dents, punctures or deformation on the panel surface
• ☐ Doors close tightly, the gasket makes contact evenly around the whole perimeter
• ☐ The door can be opened from the inside — test it directly, this is a safety requirement
• ☐ For low-temperature rooms: the door frame heater is fitted and powered
• ☐ A pressure relief valve is fitted on sealed rooms
• ☐ Lighting works and has a protective cover

Tip for checking the door seal: close the door, switch off the lights inside, switch on the lights outside and look from within. Any line of light coming through is a gap.

Part 2 — Floor and drainage

• ☐ Floor is level, no standing water
• ☐ Condensate drainage runs clear — pour water through it to check
• ☐ For freezer rooms: the condensate drain line has anti-freezing protection
• ☐ The sign-off report for the floor slab and floor insulation, made before the envelope went up, is in the document set

If the floor was never signed off before the envelope went up, ask for the photographs and the report from that stage — because it can no longer be inspected directly.

Part 3 — Equipment and piping

• ☐ Equipment matches the specified type, origin and rating — check the machine plates against the contract list
• ☐ Pipework is fully insulated, no exposed sections, no condensation forming
• ☐ Evaporators are installed where the drawing shows, with clearance to walls and ceiling
• ☐ The evaporator air throw is not blocked by columns, racking or structure
• ☐ A system leak test report is available
• ☐ Inspection records for the pressure equipment are available
• ☐ The condenser sits in open air, not shielded from the wind, with access for cleaning

Part 4 — Electrics and controls

• ☐ The control panel has the circuit diagram fixed inside it
• ☐ Wiring is tidy, numbered, with secure terminals
• ☐ Protection devices are fitted: high-pressure switch, low-pressure switch, overload protection, phase-loss and phase-reversal protection
• ☐ Trigger a real alarm condition — temporarily shift a setpoint or simulate the fault to confirm the alarm actually sounds, not just that a lamp lights
• ☐ Temperature sensors sit at representative points, not next to the evaporator and not next to the door
• ☐ For rooms with standby power: carry out an actual changeover test

Part 5 — Test run

The most important part, and also the one most often rushed:

• ☐ Record the pull-down time from ambient to design temperature and compare it with what was promised
• ☐ Watch temperature stability over at least a few compressor on/off cycles
• ☐ Measure the temperature at several points in the room with the reference thermometer — far corner, near the door, near the ceiling, close to the floor
• ☐ Compare your readings with the value shown on the controller
• ☐ Watch one complete defrost cycle and check the evaporator is clear of frost afterwards
• ☐ Check there is no standing water or ice on the floor after the defrost cycle
• ☐ Record the compressor current under steady-state running

The temperature difference between measuring points is the single most valuable piece of information from this step — it tells you whether there are dead zones.

Part 6 — Handover documents

• ☐ Refrigeration system schematic diagram
• ☐ As-built installation drawings
• ☐ Control circuit diagram
• ☐ Equipment list with ratings, origin and serial numbers
• ☐ Valid inspection records for the pressure equipment
• ☐ Material documents: panels, doors, main equipment
• ☐ Operating instructions in Vietnamese
• ☐ Proposed maintenance schedule and warranty scope, in writing
• ☐ Reports from the earlier stage sign-offs
• ☐ Operating staff have been trained, with a record of it

Three things to do right after handover

• Record the initial operating figures — pressures, current draw, pull-down time while the room is still new. This is the baseline you will compare against later to tell whether the system is degrading.
• Photograph the initial layout of the evaporators and an acceptable way of stacking goods, as a reference for staff later on.
• Start an operating log from day one. Most major failures show a slow drift beforehand, and only a log reveals the trend.

This checklist applies to any project, but it gets a great deal lighter if from the outset you choose a supplier providing turnkey cold storage who is responsible from design through to handover.

Related pages

• Cold store construction schedule and acceptance milestones
• What a HACCP-compliant cold store has to deliver
• What pressure vessel inspection documentation comprises
• Common cold storage faults
• Cold storage operating procedure

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