Q: After installing night covers on my meat cases, will I have to adjust my thermostat controls?
A: A self-serve meat case will typically have a discharge air temperature of about 22° to 24° F in order to ensure the product holds constant at or near 32° F. Since the discharge air temperature is so low, it is important to closely monitor the case once a night cover is installed. If the case is controlled by a thermostat or electronic evaporator pressure regulator valve (EEPR Valve), the case temperature (discharge air temperature) will automatically adjust when the covers are pulled down and there is typically no further monitoring or adjustments needed.
Covering the display case with Econofrost creates a thermal barrier between the product inside the case and the ambient store air. It ensures the product temperature comes down to discharge air temperature. If the display case is controlled with a mechanical EPR Valve, then it may not self-adjust and as such, there is a possibility freezing will occur.
To ensure this does not happen, a night-time temperature setback is suggested. A night-time temperature setback is done by the refrigeration service technician – and the amount of adjustment depends on each refrigeration system. We suggest trying 1° F to start. For example, if the case discharges at 22° F, the technician may adjust the mechanical EPR Valve to 23° F and monitor it from there.