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Key technical specifications for the L-1Xe model, including water consumption, dimensions, and electrical requirements.
Details the timing and sequence of the L-1Xe's wash, drain, and rinse cycles.
Overview of the L-1Xe dishwasher/glasswasher, its features, and basic operation.
Procedures for unpacking, positioning, and initial setup of the dishmachine.
Essential electrical supply specifications, wiring guidelines, and safety precautions.
Information on water supply and drain connections, including pressure and size requirements.
A step-by-step checklist to ensure proper installation and setup of the dishmachine.
Steps for preparing the machine, including checks, chemical setup, and filling.
Essential checks like drain screen and spray arm security before starting.
Guidelines for ensuring adequate chemical supply and proper usage of detergents and sanitizers.
Instructions on how to fill the wash tank to the correct level using the Fill/Start switch.
Procedures and considerations for daily operation, including pre-scraping and chemical dosage.
Importance of scraping dishes before loading to optimize wash performance.
How to adjust timer cams for correct dispensing of detergent, sanitizer, and rinse aid.
Adjusting the fill cam for proper water levels and preventing pump cavitation.
Details on the water pump motor, impeller, and operational specifications.
Explanation of pump cavitation and methods to prevent it through water level control.
Step-by-step instructions for safely deliming the dishmachine to remove mineral buildup.
Information on the timer assembly, its cams, and their role in cycle control.
Detailed steps for adjusting the timer assembly cams to fine-tune cycle timing.
A troubleshooting table listing common issues and their solutions for quick reference.
Comprehensive guide to diagnosing and resolving various machine problems with causes and solutions.
The CMA L-1Xe is a low-temperature commercial dishwasher/glasswasher designed for under-counter installation, offering a compact yet feature-rich solution for dishwashing needs. Its primary function is to automatically wash, rinse, and sanitize dishes and glassware using a chemical sanitizing process.
The L-1Xe operates on a 90-second (1½ minute) operational cycle, which is initiated by toggling the Fill/Start switch to the "START" position. The machine then automatically progresses through its various stages: wash, drain, and rinse.
During the wash cycle, the pump motor circulates water from the wash tank to the spray arms, delivering it to the dishes at a rate of 52 gallons per minute (196.8 LPM) and a pressure of approximately 7 to 10 PSI. Detergent is automatically dispensed into the wash tank a few seconds after the cycle begins, ensuring effective cleaning. The wash tank heater, controlled by a dedicated cam switch, operates only when the dishmachine is not in a cycle, preventing excessive electrical current draw.
Following the wash, the drain pump energizes to remove the wash water from the machine. This allows the machine to refill with clean rinse water. During the rinse cycle, sanitizer and rinse aid are automatically dispensed to ensure proper sanitization and spot-free drying of the wares. The machine is designed to prevent the pump from running dry during the refill process by pausing the pump motor for about eight seconds after the drain function.
A key feature of the L-1Xe is its reliance on chemical sanitization, specifically a low-temperature sodium hypochlorite solution (bleach) at a concentration of 50-100 p.p.m. This chemical-sanitizing approach eliminates the need for a high-temperature booster heater, making it a low-energy model.
Operating the L-1Xe is straightforward. After initial setup, which includes ensuring proper chemical supply and filling the wash tank to the designated "Fill Line," a simple toggle of the Fill/Start switch starts the automatic cycle. A red cycle light illuminates to indicate that an operational cycle is in progress.
The machine is equipped with a removable drain screen, which is crucial for operation. This screen strains circulating water and collects heavy solids or broken glass, preventing them from clogging the pump impeller. Operators are instructed to load racks into the machine and close the door before starting a cycle.
For optimal performance, pre-scrapping of wares is essential. This practice helps prevent excessive debris from entering the machine, allowing it to operate for an entire shift without needing to remove and clean the drain screen.
The L-1Xe requires a hot water supply, with a recommended temperature of 140°F (60°C) and a minimum of 120°F (49°C). The flowing water pressure to the dishwasher should be between 15-65 PSI. If the pressure exceeds 65 PSI, a pressure regulating valve must be installed (by others). Insufficient water pressure (below 15 PSI) can lead to improper machine operation.
The machine also features a "Delime" switch, located behind the lower front panel, which is used during the deliming process. For normal operation, this switch must be in the "Normal" position; otherwise, the machine will run continuously.
Routine maintenance is crucial for the L-1Xe's longevity and efficient operation. At the end of each shift, operators are instructed to drain the machine by holding the Drain push button switch until it is completely empty. It is important not to hold the button longer than necessary to avoid running the pump dry.
After draining, the drain screen and spray arms should be removed and cleaned. The drain screen can be scrubbed with a heavy brush and rinsed under a faucet. If spray arms are clogged, they can be removed by turning the bearing clockwise, and the jets can be cleared with a toothpick, pushing trash into the arm, and then flushing with water. Reinstallation of the spray arms involves turning the bearing counter-clockwise.
The L-1Xe's chemical dosage (detergent, sanitizer, and rinse aid) and water fill level are controlled by adjustable cams on the timer assembly. While these cams are factory-set, they may require adjustment after installation to maximize chemical efficiency and ensure proper water levels. Cam adjustments should only be performed by qualified personnel after turning off the circuit breaker to the machine. The process involves rotating one side of the cam on the shaft to increase or decrease the size of the cam groove, thereby adjusting the duration of the corresponding function.
Regular inspection for lime deposits inside the dishwasher/glasswasher is recommended. Deliming, a process to remove mineral buildup, should be performed by a qualified chemical specialist due to the caustic nature of deliming agents. The process involves manually draining the tank, filling it with fresh water, adding the deliming solution, running the machine in "Delime" mode until the lime is dissolved, and then rinsing the machine thoroughly.
The machine is designed for hard-wiring to a dedicated, appropriately sized circuit breaker, and it is crucial not to use a power cord or GFI outlet. Electrical and plumbing connections must comply with all applicable Federal, State, and Local Health, Electrical, Plumbing, and Safety codes. CMA recommends using a water softening system to maintain water hardness at 3.5 gpg (grains per gallon) or less to prevent lime buildup and ensure optimum operation. High iron or chlorine levels in the water supply may necessitate additional filtration systems.
The L-1Xe includes a troubleshooting guide to assist in diagnosing common operational issues, such as the pump motor not shutting off, the machine not draining, or low heat during operation. This guide provides likely causes and corresponding solutions, often involving replacing switches, contactors, or other components.
General| Racks per Hour | 30 |
|---|---|
| Wash Temperature | 150°F |
| Rinse Temperature | 180°F |
| Power | Electric |
| Wash Cycle Time | 120 seconds |
| Water Usage | 0.5-1.5 gallons per rack |
| Water Consumption | 0.5-1.5 gallons per rack |
| Type | Undercounter Dishwasher |
