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HOW IT WORKS

AIR CONDITIONING 101

HOW IT WORKS

Air conditioning units have the same basic components and follow the same cycle as refrigeration units. However, an air conditioner is cooling a much bigger, less enclosed “box”. It is also not trying to reduce the temperature to the level of a cooler or freezer.

SOME SUGGESTIONS IF YOUR AIR CONDITIONING ISN’T COOLING PROPERLY

  1. Is your thermostat set to cool?
    Make sure it is no lower than 70 degrees F

  2. Is unit iced?
    Turn cooling OFF and turn fan ON for 2 hours and restart.

  3. Is the circuit breaker tripped or off?
    Reset or turn breaker to ON.

If these remedies do not resolve the issue, call for service.

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HOW IT WORKS

REFERIGERATION 101

HOW IT WORKS

Refrigeration systems are closed loop operations, and maintain the colder temperatures since they are within a closed, insulated box. Low temp refrigerants are used for freezers and medium temp refrigerants are used for coolers. They contain at least (and usually many more) components: a compressor, a metering device, a hot (condenser) coil, a cold (evaporator) coil, fans (for the condenser and evaporator coils) and a control unit (thermostat). The cycle is as follows:

  1. The compressor receives refrigerant from the evaporator. It compresses the refrigerant, which cause it to become a hot, high pressure (a couple hundred pounds per square inch) gas.

  2. The liquid refrigerant then passes through a metering device where it evaporates, resulting in a low pressure, cold gas.

  3. This low pressure gas circulates through the evaporator coils, absorbing the heat and cooling the box.

  4. The gas returns to the compressor, starting the cycle again.

SOME SUGGESTIONS IF YOUR REFRIGERATION UNIT IS NOT FUNCTIONING CORRECTLY

MAKE TABLES AND REACH IN UNITS

  1. Check the unit for power – are the fans coming on and/or the box lights on?
    If no, check and make sure the unit is plugged in correctly.

  2. Is the inside coil iced?

    If yes, unload the unit and deice. In addition, you may want to unplug the unit for 24 hours to deice thoroughly. If unit ices up again within a short time, call for service.

  3. Is the thermostat turned on?

  4. Is the condenser coil area free of debris and dirt?

  5. If the make table has a cold rail, make sure the rail switch is on.

If none of these work, call for service.

WALK IN COOLERS

  1. Is the circuit breaker tripped or off?
    Reset or turn breaker ON.

  2. Is the switch inside the box that operates the fans turned to “operate or ON”.

  3. Is the inside coil iced up?

    1. If yes, then turn the thermostat up to 90 degrees F for 2 hours. If unit is not equipped with a thermostat, turn the power off to the compressor for 2 hours.

    2. In both cases, deice the coil with the fans, leaving them in the ON position.

If these remedies do not work, call for service.

WALK IN FREEZER

  1. Is the circuit breaker tripped or off?
    Turn breaker on and/or reset

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