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Convenience Store


Westown is a busy combination food and liquor store with 2 large walk in coolers and 4 free standing reach in coolers and freezers and energy bills were very high due to the poorly controlled anti-sweat and aging evaporator systems.

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REFRIGERATION UPGRADE

Refrigeration accounts for about 60% of the electric bill in a convenience store. Evaporator fan replacement with two speed ECM motors were added to reduce fan energy by 92%. During this process it was discovered that 4 of the fans were spinning in the wrong direction. This was causing icing on the coils and constant compressor problems. The coils were also very dirty and were cleaned during the installation. In addition, a cold air economizer was added to utilize outside air in the winter. This replaces refrigeration for approximately 138 days a year.

AUTO ANTI-SWEAT INSTALLED SEPARATED FROM LIGHTING

When the coolers were installed initially the contractor had wired the anti-sweat circuits to the lighting. They could not be turned off and were running 24/7. This unseen power usage was running over 22 amps.
In order to control this a contactor circuit was installed in 3 locations and a de-humidistat installed to turn the system on when humidity was raised above caser dew point.

LIGHTING CONVERTED TO LED

The existing lighting was still T12 and in poor condition. The store was converted to LED and fixtures were added and moved to improve merchandizing. * This lowers HVAC and exhaust energy by 30%.


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