Maintenance, Stainless Steel Care Cleaning

Delfield

MAINTENANCE

CAUTION

The thermostat must be turned to OFF and the cabinet disconnected from the power source whenever per- forming service, maintenance functions or cleaning the refrigerated area.

CAUTION

Never use an acid based cleaning solution! Many food products have an acidic content which can deteriorate the finish. Be sure to clean ALL food products from any stainless steel surface. Common items include, toma- toes, peppers and other vegetables.

STAINLESS STEEL CARE AND

CLEANING

To prevent discoloration or rust on stainless steel several important steps need to be taken. First, the properties of stainless steel need to be understood. Stainless steel contains 70-80% iron which will rust. It also contains 12-30% chromium which forms an invisible passive film over the steels surface which acts as a shield against corrosion. As long as the protective layer is intact, the metal will not corrode and is still stainless. If the film is broken or contaminated, outside elements can begin to breakdown the steel and begin to form rust or other discoloration.

CAUTION

NEVER USE STEEL PADS, WIRE BRUSHES OR SCRAPERS!

Do not use an abrasive cleaner because it will scratch the stainless steel and plastic and can damage gaskets. Proper cleaning of stainless steel requires soft cloths or plastic scouring pads.

Cleaning solutions need to be alkaline based or non- chloride cleaners. Any cleaner containing chlorides will damage the protective film of the stainless steel. Chlo- rides are also commonly found in hard water, salts and household and industrial cleaners. If cleaners containing chlorides are used, be sure to rinse repeatedly and dry thoroughly upon completion.

Routine cleaning of the interior and exterior can be done with soap and warm water. Extreme stains or grease should be cleaned with a non-abrasive cleaner and plastic scrub pad. When cleaning the exterior, always rub with the grain of the stainless steel to avoid marring the finish. There are also stainless steel cleaners available which can restore and preserve the finish of the steels protective layer.

Early signs of stainless steel breakdown can consist of small pits and cracks. If this has begun, clean thoroughly and start to apply stainless steel cleaners in an attempt to restore the passivity of the steel.

CLEANING THE CONDENSER COIL

The condenser coil requires regular cleaning every 90 days (recommended). In some instances you may find a large amount of debris and dust or grease accumu- lated prior to the 90 day time frame. In these cases the condenser coil should be cleaned every 30 days.

If the build up on the coil consists of only light dust and debris the condenser coil can be cleaned with a simple brush. Heavier dust build up may require a vacuum or even compressed air to blow through the condenser coil.

If heavy grease is present there are de-greasing agents available for refrigeration use, and specifically for the condenser coils. The condenser coil may require us- ing a de-greasing agent and then being blown through with compressed air. Follow the de-greasing agent manufacturer’s instructions.

Failure to maintain a clean condenser coil can initially cause high temperatures and excessive run times. Continuous operation with dirty or clogged condenser coils can result in compressor failure. Neglecting the condenser coil cleaning procedures will void any warran- ties associated with the compressor or cost to replace the compressor.

CAUTION

Never use a high pressure water wash for this cleaning procedure as water can damage the electrical compo- nents located near or at the condenser coil.

In order to maintain proper refrigeration performance, the condenser fins must be cleaned of dust, dirt and grease regularly. It is recommended that this be done every three months. If conditions are such that the condenser is totally blocked in three months, the frequency of cleaning should be increased. Clean the condenser with a vacuum cleaner or stiff brush. If extremely dirty, a commercially available condenser cleaner may be required.

If your freezer seems to vibrate excessively when the compressor is running, loosen (but do not remove) the bolts on the compressor. Semi-hermetic models should be loosened before operating.

4400 series specifications

The Delfield 4400 Series is a meticulously designed line of commercial refrigeration units engineered for efficiency, reliability, and performance in the demanding restaurant and foodservice environment. With a strong reputation built over decades, Delfield has established itself as a leader in producing high-quality refrigeration equipment that caters to the needs of chefs and foodservice operators.

One of the standout features of the 4400 Series is its energy efficiency. The units are designed with advanced technology to minimize energy consumption, thus reducing operational costs while maintaining optimal temperatures. This is achieved through the use of high-performance, environmentally friendly refrigerants and state-of-the-art insulation that maximizes energy retention.

In terms of temperature control, the Delfield 4400 Series is equipped with digital thermostats that provide precise temperature management. The easy-to-read LED display allows for quick monitoring and adjustment as needed. These features are crucial for ensuring food safety and extending the shelf life of perishable items.

The durability of the Delfield 4400 Series is another key characteristic. Constructed from high-quality stainless steel, these units are designed to withstand the rigors of a bustling kitchen environment. The robust design not only enhances their appearance but also makes them resistant to corrosion, ensuring longevity and minimal maintenance.

Another innovation in the 4400 Series is the inclusion of advanced airflow technology. Delfield units are equipped with efficient fan systems that promote even air distribution, eliminating temperature fluctuations and ensuring that all food items are kept at consistent temperatures, regardless of their placement within the unit.

The 4400 Series also prioritizes user-friendliness. The ergonomic design and accessible controls cater to the needs of kitchen staff, making it easy to operate and maintain the equipment. Options for additional features, such as locking doors and adjustable shelving, allow operators to customize the units according to their specific requirements.

Overall, the Delfield 4400 Series represents a perfect blend of innovative technology, energy efficiency, and user-friendly design, making it an ideal choice for foodservice professionals looking to enhance their kitchen operations. Whether for storage or display, these refrigeration units exemplify quality and reliability in the fast-paced culinary world.