With initial evaluation, system modeling, and equipment procurement complete, the next step in the retrofit process of an open refrigerated display case is to proceed with the action of physically retrofitting the cases with doors. Contractors should have experience in performing case retrofits and refrigeration system reconfigurations. All equipment should be installed per the guidance of the door manufacturer, retrofit kit provider, or other applicable equipment supplier.
In preparation for the installation of doors and other work performed as part of the retrofit, merchandise housed in the affected cases should, if necessary, be removed and transferred to other cases, walk-in coolers, or other refrigerated storage spaces in a manner so as to mitigate product loss. Electrical supply to the affected cases and systems should be interrupted per the instructions of the supervising engineer so as to ensure a safe working environment. Refrigerant valves should be closed, or the refrigerant supply to the case otherwise interrupted to lower the potential for refrigerant leakage should the sealed system components accidentally be punctured.