Kettle Facts: Model TDB-7 (240 Volt)

Kettle Facts: Model TDB-7 (240 Volt)

Manufactured by Groen exclusively for Calico, the water-jacketed stainless steel kettle uses a motor-driven mixer and thermostatically controlled electric heater for uniform mixing and heating. This model was discontinued at the end of 1986.

Here’s what you need to know about:
Electrical requirements
Water level requirements
Cleaning and sanitizing
Winter care


Electrical requirements. The kettle uses 240 volts on a dedicated 50-ampere circuit. 

Water level requirements. To ensure you’re using the right amount of water, you need to check the “sight glass” on the front of your kettle; it indicates the level of the water in the kettle’s jacket. The recommended level is at ½ inch below the top of the sight glass.

You may need to replenish the water periodically due to water evaporation or other factors. That’s especially important if you use the kettle frequently, because there’s a greater possibility of water loss caused by evaporation. As a result, you’ll need to be even more vigilant in checking the water level.

Should the level drop to more than ½ inch below the top of the sight glass, or if the kettle jacket is drained for any reason, the water should be replaced with distilled water only. The procedure is as follows:

  1. Unscrew the fill plug from the metal elbow at the rear of the kettle.
  2. Add distilled water through the metal elbow until the water level is ½ inch below the top of the sight glass.

    Note: Since the water you’re adding must raise the level in the entire kettle jacket, substantial amount of water is needed to make a small change in the level. For a kettle that has been drained completely, we recommend you have on hand at least three gallons of distilled water to attain the recommended level.
  3. Replace the plug upon completion.
  4. Tilt the kettle back and forth, while adding the distilled water, to eliminate any trapped bubbles in the sight glass.

Use of the kettle without any water in the jacket may burn out the kettle’s heating element. Therefore, be sure to inspect the sight glass daily to check that the water level is at least at the recommended mid-point of the sight glass.

Cleaning and sanitizing. Clean the external and internal surfaces of the kettle daily. And remember to check its sides and back. Cleaning the food contact surfaces as soon as possible after use will make the task easier.  Remember: Keep water and sanitizing solutions away from controls and electrical connections. And avoid direct contact with hot surfaces.

  1. Pour two buckets of water using your Calico-supplied large bucket (11 quarts) into the kettle and bring the water level to just over the top of the agitator scraper arms (about 2 inches from the rim).
  2. Turn the heat on the thermostat to #5 and turn on the mixer for 15 minutes.
  3. Turn off the kettle’s heat and mixer. Tilt the kettle and pour the water out using the 11 quart bucket. (Caution: water will be hot). Then use the Calico-supplied smaller bucket (5 quarts) to remove the remaining water. Remove the agitator and wash it and all utensils. To remove stuck-on material, use a brush, sponge, cloth or rubber scraper. With a clean sponge or damp paper towels, wipe off any residue on the inside of the kettle.

    Note: never use metal tools or other abrasive products that might scratch the surface. Scratches make the surface harder to clean and provide places for bacteria to grow. Also, don’t use steel wool which may leave particles in the surface and cause corrosion and pitting.
  4. After rinsing the kettle, you may need to sanitize the kettle using chemicals, if required by your local health department. Use a solution equivalent to one that supplies 200 parts per million available chlorine, which may be available through you local sanitary supply vendor. (One suggested sanitizer is Klenzade XY-12 from ECOLAB). Follow the supplier’s instructions carefully and apply the sanitizer after the unit has been cleaned. Rinse off the sanitizer thoroughly. Remember: Never leave a chlorine sanitizer in contact with stainless steel surfaces longer than 30 minutes.

    Most sanitizing solutions are harmful to the skin, eyes and mucous membranes. Wear rubber gloves and goggles or a face shield.
  5. Wipe down the entire exterior of the kettle to eliminate any powder that might have settled there. At night, consider covering the kettle with a cloth or plastic bag. If you have any hard water white stains on the exterior of the kettle, they may be removed by using Noxon or Flitz metal polishing creams.

Winter care. Kettle care during the winter requires special steps, especially if you plan to store it in freezing temperatures.

Be sure to drain the water (approximately 2 gallons) from the jacket of the kettle. Then follow these instructions:

  1. Locate the drain plug (resembles a silver nut) at the bottom of the lower sight glass holder and open it to let the water drain.
  2. Make sure the kettle is completely empty before tightening the drain plug.
  3. After draining the kettle, affix a large note reminding you to add 2 gallons of distilled water before using it in the Spring. Adding the proper amount of distilled water will prevent damage to the heating element.

    Note: The jacket is full when the water is ½ inch below the top of the sight glass.