This instructional video will be covering the model CMA 180 series upright high temperature dishwashers. Also included in this series are CMA's two most recent designs—the new model 180-VL with the ventless design option and model CMA 180T, also referred to as a tall or scullery machine with the new split door design. Sometimes, the 180T has even been called a bakery-style dishwasher for its ability to wash a full size sheet pan due to the machine's extra high clearance. All dishwashers described so far are available in straight and corner configurations. This video will be focusing on the installation and service of these high temperature dishwashers. Here we have our model CMA 180 series dishwashers. These units require a 140 degree water supply through two water inlet valves. One is for the initial fill valve and the other is for the fresh water high temperature final rinse. All units will require a 2" drain line, which can be directed to either the building's plumbing directly or to a floor drain or floor sink if one is located near the dishwasher. These units are typically ordered with a booster heater built right into the framework or footprint of the dishwasher. This booster heater will be pre-mounted and plumbed directly into the final rinse plumbing. These models can be ordered without a booster heater. However, its installation will be required to run these machines as high temperature dishwashers. In the event that the unit is ordered without a booster heater and you find one is required, it can be ordered as an add-on kit installed in the field. The power requirements for all model 180 series dishwashers are 208V-240V single phase or 3 phase, and they can be installed with a single or dual power source. These models can also be special ordered as a 380V or 480V dishwasher, though at the time of your order, it must be specified as a 50 or 60 Hz unit. At the top of each dishwasher is the control box where all electrical connections are made. This also includes the connections for the chemical dispensers, detergent, and rinse aid. In the back of the control box, which is located on the left hand side near the bottom, is the conduit connection for the main power wires. Pass through to the main terminals L1, L3 for single phase installation, and the L2 terminal which is used for 3 phase installation. Please remember that if the location has a high leg or wild leg, it must be connected to the L2 terminal in all 3 phase applications. Located at the top of the terminals are the dispenser terminals for the detergent and rinse aid signals. Red for detergent and blue for rinse aid. The main power can be picked up on terminals L1 and L3 for the main contactor, so the dispenser will be powered up when the dishwasher power is turned on. Located on the back wall of the control box on the right hand side is the blue solid state timer that controls the auto-fill feature of the dishwasher. This may have to be adjusted during installation if the machine is being installed with extremely high or low water pressure. This unit has two available options that can be ordered from the factory, which can be installed in the field for units that are already in service. First, is the exhaust fan control. This option is used to control the activation and deactivation of the exhaust fan, which, during installation, is placed over the dishwasher in most facility locations. Also, this unit may also require a drain tempering kit to quench or cool down the water being discharged from the machine during the rinse cycle. The dishwasher has two water valves. One for the auto-fill feature of the dishwasher located directly behind the main control box at almost the center of the dishwasher, and the final rinse valve located at the rear left hand corner of the dishwasher. Both valves are fed by one ball valve with a built-in line strainer to keep debris out of the dishwasher plumbing system. The final rinse is water supplied directly to the booster before entering the final rinse arms through a pressure regulator valve, or PRV. The final rinse pressure should be 20 PSI +/- 5 PSI. However, for best results, we found the most optimum pressure to be 22-23 PSI. The gauge will only display the pressure when the final rinse is active. Located inside the control box at the top of the dishwasher is the main activation switch, which is labeled: delimer, off, normal. After the machine has been fully installed and filled with water, this switch should be moved to the normal position. Please note, if this switch is not in the normal position, it will not auto start when the doors are lowered. Located at the bottom left hand corner of the control box are two black wires with yellow stripes. These wires are disconnected during shipping, which has been done to prevent the booster heater element from being activated before first being filled with water. Before connecting the two wires and after having the water and power connected to the dishwasher, fill the booster heater with water by way of the manual rinse switch located at the outside bottom right hand rear corner of the control box. Located at the bottom left hand side underneath the wash tank is the booster heater. This unit requires a 140 degree water supply, which results in a 40 degree rise in temperature within 90 seconds and a 70 degree rise in temperature within 2 minutes. By removing the front cover, we will see the element, the hi-limit switch, and the thermostat. The wash tank heater is located on the right hand side of the dishwasher. Behind the cover, we will once again see the element, the hi-limit switch, and the thermostat. Also located behind the machine inside each cover, you'll find the configuration for the unit's single phase or 3 phase conversion. The temperature gauges are located at the top of the dishwasher just behind and to the right of the control box. Please remember that the wash tank temperature will be displayed at all times. However, the final rinse temperature and the pressure will only be displayed during the machine's active operation. Keep in mind that all of the model CMA 180 series machines, including the model 180UC undercounter dishwasher, include the new safety temp feature. This feature assures that the final rinse cycle will operate with the booster heater being at the set point, or at the appropriate temperature for a high temperature sanitizing final rinse, which is required to complete a wash cycle. Both wash and rinse arms are located inside the dishwasher's wash cabinet with one set of each located at the top and bottom of the wash cabinet. Both top and bottom wash and rinse arms are identical and fully interchangeable. They both should be removed and inspected on a daily basis and cleaned if necessary. To clean both arms unscrew and remove the end caps. Clean the jets using a toothpick or soft bristle brush, and always rinse thoroughly with fresh water. If the arms have scale buildup, use a chemical descaler as recommended by your chemical supplier. Remember to read all labels and follow the chemical handling instructions. Or, ask your chemical supplier how to use their chemicals. The wash tank has two removable scrap trays that are located on the bottom right hand side of the wash tank. Inside the wash tank is the heater element that runs the length of the tank. Just next to it at the front of the tank is the thermostat capillary and float switch. The float switch is protected from debris by a guard that allows easy access to clean the switch on a daily basis. At the extreme right side of the wash tank, notice the wash tank's scrap tank overflow. When the dishwasher is in the rinse cycle, the rinse water will carry all debris out of the dishwasher, which may have been missed when pre-scrapping the dishes before placing them into the dish rack. This will keep the wash water clean and free of debris and the screens in the tank will keep the heavier debris out of the wash pump. To prevent any debris from getting into the wash pump remember to rinse the wash tank before removing the scrap screens. Remember, the better you pre-rinse, the better the wash results will be. CMA dish machines—always delivering peace of mind.
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This video presents step-by-step instructions for installing your CMA 180 series dishwasher, and even goes over additional requirements you will need such as a 2" drain line. Check it out to learn more!
This video gives an overview on the features of the CMA 180 series dishwashers, with a focus on the CMA-180-VL ventless unit. It also covers some maintenance and usage tips, like how to repair a wash pump!
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