Carburetor Assembly

Your new freezer uses a metering device, known as a carburetor, to feed the proper ratio of mix and air into the freezing cylinder. For products such as dairy based shake mixes, the proper mix to air ratio is generally accepted to be two parts mix to one part air. This proportion yields a finished product that is both tasty and profitable. At this ratio, one gallon of liquid mix will yield a volume of one and one-half gallons of frozen product.

The carburetor is a tube with a hole, or series of holes, bored through the side. It is located in the hopper and fits in a hole that leads to the freezing cylinder. Air flows into the freezing cylinder through the top of the tube and mix flows in through a smaller hole in the side of carburetor tube. The size of the mix inlet is balanced with the viscosity (thickness) of the liquid mix and product draw rate, in such a way that the proper amount of mix is fed into the freez- er cylinder to blend with air at just the right ratio. Mix viscosity varies by mix type, mix temperature, and mix age. Different serving rates also demand different feed rates. The Crathco carburetor has an outer sleeve that can be rotated to line up with different hole sizes to provide ideal overrun under all operating conditions.

You will need to experiment to determine how much mix to add to the freezing cylinder at start-up. This can be done by watching the level of mix through the clear plastic dispensing valve when filling the hopper. When the correct amount of mix feeds into the freezing cylinder install the carburetor tube in the "Off" position (outer sleeve set between any two holes) and turn the freezer "ON" to freeze down to proper consistency.

Overrun

Overrun is the increase in product volume, expressed as a percentage, resulting from the entrapment of air in liquid mix as it is frozen.

The rotating dasher blends air into the mix as it is frozen, resulting in increased product volume. For example, if one gallon (4.4 liters) of liquid mix is poured into a freezer and one and a half gallons (6.6 liters) of frozen product is drawn out, the result is a fifty percent volumetric increase, or a fifty (50%) percent “overrun”.

Why is overrun important? The introduction of air into the finished frozen product is essential from two standpoints...taste and profitability. Frozen product with a low percentage of overrun costs more to serve, appears wet, and is heavy. The introduction of air makes the finished frozen product taste richer. Too much air causes the finished product to be too light and fluffy, making it less satisfying and adversely affecting sales. The optimum percentage of overrun varies from one type of mix to another, but 50% overrun is a good average. The ingredients in some mixes take on and hold air easier than others. Overrun also affects profitability. For example, an increase from 25% to 50% overrun represents a mix savings of 17%.

Uniform overruns ensures consistent portion costs. If overrun is allowed to drop, it will cost more to serve a portion of finished product.

Computing Overrun

1)Weigh an empty cup.

2)Weigh this cup filled to the top with liquid mix, and subtract the weight of the cup.

Note: Repeat this step only when changing mix sources, as mix weight will vary slightly from one supplier to another.

Crathco® 5000 Series Manual

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Grindmaster 5311, 5941, 5511, 5711 instruction manual Carburetor Assembly, Computing Overrun
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5941, 5711, 5311, 5511 specifications

The Grindmaster 5711, 5941, 5311, and 5511 series of coffee grinders have emerged as prominent tools for coffee enthusiasts and professionals alike. Known for their durability and precision, these grinders offer a range of features that cater to various brewing methods and preferences.

At the heart of each model is a set of high-quality, stainless-steel burrs designed for consistent grind size. Burr grinders, as opposed to blade grinders, provide uniformity in particle size, which is essential for optimal extraction and flavor in coffee brewing. The Grindmaster series employs advanced grinding technology that minimizes heat transfer, preserving the delicate oils and aroma of the coffee beans during the grinding process.

One of the main features across these models is their user-friendly interface. They are equipped with intuitive controls, allowing users to easily adjust grind settings to achieve the desired coarseness or fineness. The 5711, for instance, is celebrated for its precision adjustment system, enabling users to fine-tune their grind settings for varying brewing methods, from espresso to French press.

Another noteworthy characteristic is the incorporation of an efficient motor that not only ensures smooth operation but also enhances durability for long-term use. These grinders operate quietly, making them suitable for environments where noise reduction is essential, such as coffee shops or homes with open layouts.

Safety and convenience features are also integral to the Grindmaster series. Most models include a safety lock to prevent operation while the grinder is being cleaned or adjusted. The removable grinding chamber makes it simple to clean and maintain the equipment, extending its lifespan and ensuring consistent quality.

The design of the Grindmaster grinders reflects both functionality and aesthetics. Their sleek and modern appearance fits seamlessly in both commercial settings and home kitchens. The robust construction withstands daily wear and tear, making them a reliable choice for frequent use.

In summary, the Grindmaster 5711, 5941, 5311, and 5511 models are distinguished by their advanced grinding technology, user-friendly design, durability, and aesthetic appeal. These grinders not only enhance the coffee brewing experience but also exemplify the commitment to quality that Grindmaster is known for in the specialty coffee industry. Whether for a coffee shop or a home barista setup, these grinders deliver the performance and precision required to unlock the full potential of coffee beans.
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