LX30H

Overview

The Hobart LX30H is a fully automatic, front-loading commercial dishwasher from the LX Series. It has a fresh-water rinse and a built-in booster heater. The manual says the machine normally takes incoming water at 140 °F and heats it in the booster to 180 °F. It also notes that a 70 °F temperature rise is possible on the LX30H and advises contacting a local Hobart Service Office about that condition.

The manual identifies the LX30H as model ML-104354. Standard equipment listed for the LX Series includes two 20-inch by 20-inch racks, electronic controls, a pumped drain, a fill hose, and a drain hose. The motor is specified as 3/4 horsepower. LX Series machines shut down automatically four hours after their last use to conserve energy.

Key Features

• Fresh-water rinse: The LX30H rinses with fresh water and retains the rinse water for the next wash cycle only on the LX18H; that LX18H detail does not apply to the LX30H.
• Built-in booster heater: The booster heats the rinse water. The manual gives the LX30H’s normal incoming-water and heated-water temperatures in the Specifications section.
• Automatic operation: The LX Series is described as fully automatic and front-loading.
• Water use: The manual specifies 1.2 gallons per rack for LX30 and LX40 models.
• Automatic idle shutdown: The dishwasher shuts down four hours after its last use.

Specifications

• Model: Hobart LX30H.
• Manual model number: ML-104354.
• Product type: Fully automatic, front-loading dishwasher.
• Motor: 3/4 horsepower electric motor, as stated for the LX Series.
• Racks: Two 20-inch by 20-inch racks are listed as standard LX Series equipment.
• Controls: Electronic controls, listed as standard LX Series equipment.
• Drain: Pumped drain; a drain hose is listed as standard LX Series equipment.
• Water use: 1.2 gallons per rack for LX30 and LX40 models.
• Rinse type: Fresh-water rinse.
• Booster: Built-in booster heater.
• Incoming water temperature: 140 °F minimum for LX30H, according to the water-requirements table.
• Normal booster rinse temperature: The manual describes heating the 140 °F incoming water to 180 °F.
• Temperature rise note: A 70 °F rise is possible on the LX30H; the manual says to contact a local Hobart Service Office.
• Automatic shutdown: Four hours after last use, stated for LX Series machines.

Installation & Requirements

Before installation, check the machine for shipping damage and verify that the electrical supply agrees with the specifications on the machine data plate. The manual does not provide an LX30H voltage or electrical connection rating in the supplied text. Plumbing connections must comply with applicable sanitary, safety, and plumbing codes.

Place the dishwasher in its operating location and level it before making connections. Use a carpenter’s level diagonally on the rack tracks to check front-to-back and side-to-side level; adjust the feet by threading them in or out. After leveling, the manual directs the installer to cover the exposed adjustable-foot threads with the supplied black rubber tubing.

The LX30H requires incoming water at a minimum of 140 °F and flowing pressure between 15 and 25 psig. If pressure exceeds 25 psig, the manual calls for a pressure-reducing valve with a relief by-pass; pressure below 15 psig may cause improper operation. Install a manual shutoff valve upstream of the fill hose for servicing, and flush water lines thoroughly before connecting the dishwasher. The manual recommends a water hammer arrestor meeting ASSE-1010 or equivalent in the common supply line, and recommends a line strainer between the shutoff valve and machine connection. It specifies minimum 1/2-inch copper piping OD, with 3/4-inch recommended.

A drain hose is provided with a 3/4-inch pipe connection adapter. Securely plumb it into the sink drain, take care not to kink the hose, and ensure the drain has a minimum flow capacity of 10 gallons per minute. The manual recommends water hardness of 4–6 grains per gallon and says chlorides must not exceed 50 parts per million. Water above 6 grains per gallon should be treated with a water conditioner; water below 4 grains per gallon also requires treatment to reduce potential corrosion. Depending on local water conditions, particulate filtration or reverse osmosis may be recommended. The manual advises asking the municipal water supplier about local water specifics and contacting a local Hobart Service Office for treatment recommendations.

Steam may escape from the door during normal operation. The manual says wood, laminates, and veneers are unsuitable for areas exposed to dishwasher steam and detergents, and recommends stainless steel or other moisture-resistant shields on adjacent surfaces.

Operation

Clean the machine after installation and before putting it into operation. Before use, make sure the coarse and fine strainers are in place and free of debris. The manual identifies the LX30H controls as OFF, ON, WASH, FILL, temperature display, SET, and RINSE. The supplied excerpt does not provide cycle duration or rack-throughput figures for this model.

For the LX30H’s normal rinse heating, the manual describes incoming water at 140 °F being heated by the built-in booster to 180 °F. It also notes a possible 70 °F rise and directs operators to contact a local Hobart Service Office about this condition. Keep strainers clear and wash and rinse arms unobstructed; the troubleshooting guidance links clogged strainers or arms that do not turn with poor cleaning results.

Cleaning & Maintenance

Clean the dishwasher at least once each working day. At the end of the day, thoroughly cleanse, rinse, and dry the machine, then leave the door open. Use only products formulated to be safe on stainless steel. Do not use steel wool, residential-dishwasher detergent, abrasive or harsh cleaners on the control keypad, or scouring pads on the keypad and display. Do not allow food soil to accumulate on the tank bottom or foreign objects to enter the machine. Follow chemical manufacturers’ recommended concentrations for detergent, rinse aid, and lime-scale remover; do not over-soften the water.

For the daily cleaning procedure, press OFF; the machine will drain. When the display is no longer lit, open the door and remove debris from the bottom of the tank. On the LX30H, remove the lower rinse arm by unscrewing its knurled knob, then pull the lower wash arm off its shaft. Remove the upper rinse and wash arms in the same manner. Remove the coarse and fine strainers and thoroughly clean the arms and strainers in a sink.

With a damp cloth, wipe the machine interior, water-level probes, and the probe under the fine strainer. Wipe the exterior as well, including the lip at the bottom of the door when cleaning the inside of the door. Use a mild stainless-steel cleanser and a soft cloth or brush for remaining debris. Replace the strainers, reinstall the lower wash arm by pushing it down on its shaft, and place the lower rinse arm on the shaft and tighten the knurled knob. Repeat for the upper wash and rinse arms. Spin the arms to confirm they turn freely. Clean the keypad and display with a soft damp cloth or sponge and mild cleanser. Leave the door ajar overnight to let the interior air out and dry.

Follow the chemical professional’s prescribed deliming schedule. The manual warns that deliming solution, rinse agents, or other acids must not contact bleach or bleach-containing rinse solution used in chemical-sanitizing machines, because mixing may produce hazardous gas. The LX30H is not identified in the manual as a chemical-sanitizing model. The pump motor has permanently sealed bearings and requires no lubrication. The manual cautions that failure to follow use, care, and maintenance instructions may void the Hobart warewasher warranty.

Troubleshooting

• No operation and no display: Check whether the machine is OFF, whether a fuse is blown or a circuit breaker is off at the power supply, and whether the cord is unplugged on corded models.
• No operation with a display: If the display indicates that the door is open, open and close the door. If the problem persists, the manual advises contacting a local Hobart Service Office.
• Dishes are not clean: Check for clogged strainers that restrict water to the pump, obstructions in the wash arms, wash arms that will not turn, rinse arms that will not turn, or a clogged detergent dispenser. The manual also lists excessive soil and incorrect detergent use among possible causes.
• Low temperature readings: Check that the incoming water meets the recommended temperature. The manual also lists rapid use when the hot-water supply cannot meet demand, heavy ware loads that cool wash water, and a low booster or sump-heater setting as possible causes. For the LX30H, it says to call a Hobart Service Technician about the heater setting.
• Machine will not fill or will not fill high enough: Check for low water pressure, a clogged hose strainer, dirty probes, or a main water-supply valve that is not working. The manual also lists an open drain valve as a possible cause and provides a specific OFF-ON procedure to try to clear a drain-valve obstruction. If the problem persists, contact a local Hobart Service Office.

Applications

The LX30H is a commercial warewashing machine for kitchens that need a fully automatic front-loading dishwasher with a fresh-water rinse and built-in booster heater. Its manual covers loading and cleaning the machine’s racks, strainers, wash arms, and rinse arms, making those components central to routine kitchen dishwashing and care.