CMA Dishmachines GL-X manual Proper Filling, Water Pump, Pump Cavitation

Operation

These cams were set at the factory but must be adjusted after final installation to maximize efficiency of chemical use (see section 4.1.1 Cam Adjustment.)

3.2.3. Proper Filling

The number 4 cam determines the amount the machine is automatically filled each cycle. When the number 4-cam switch actuator rides down into the cam groove, the solenoid valve on the fill line is energized causing the machine to fill. Since the cam only controls the duration of the fill, varying water pressure can vary the amount the machine fills. If the water pressure at the facility where the machine is installed is higher or lower than the water pressure was at the factory, the number 4 cam may need to be adjusted to correct the difference (see section 4.1.1 Cam Adjustment). The machine should be filling to a level about 1” deep over the entire bottom of the wash tank, or just below the lower wash arm. If the water pressure at the facility varies throughout the day, a pressure regulator may have to be installed on the water supply line to the machine to maintain constant pressure.

Note: The tank must be properly filled, and the machine properly leveled, or the float switch, which prevents the heater from turning on if the level is too low, will not permit the heater to turn on.

3.2.4. Water Pump

The water pump takes in water from the drain sump and pumps it to the spray nozzles at a rate of 35 gallons per minute and a pressure at the nozzles of approximately 7 to 10 PSI. After being released through the spray arms and washing or rinsing the dishes, the water runs down the pan to the sump, through drain screen, and back to the pump.

A 115-volt, 1 HP motor operating at 3450 RPM, drives the pump. The impeller is mounted with a right-hand thread onto a 5/8” stainless steel shaft, which is coupled to the motor armature shaft. See section Error! Reference source not found. Error! Reference source not found. for a detailed drawing.

3.2.5. Pump Cavitation

By listening to the normal pumping sound of the motor it can be determined if there is insufficient water in the machine, as you will hear a hesitation in the normal pumping rhythm, which is created by the air getting into the pump. Cam 4 can be adjusted to increase the amount of water that is automatically fed into the machine during a cycle (see section 4.1.1 Cam Adjustment).

MODEL GL-X INSTALLATION & OPERATION MANUAL Rev. 1.00A –08/04/05	9
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