1. Introduction
Thank you for choosing the GGM Gastro PRMH20 Planetary Mixer. This professional-grade mixer is designed for high-volume mixing tasks in commercial kitchens, bakeries, and pizzerias. With its robust 750-watt motor and 20-liter capacity, it is ideal for preparing dough, creams, eggs, and more. This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your new mixer.
Please read this manual thoroughly before operating the appliance and keep it for future reference.
2. Safety Instructions
Always observe the following safety precautions to prevent injury or damage to the appliance:
- Ensure the mixer is placed on a stable, level, and non-slip surface before operation.
- Always unplug the mixer from the power outlet before cleaning, assembling, disassembling, or performing any maintenance.
- Keep hands, hair, clothing, and utensils away from moving parts during operation to prevent injury.
- Never operate the mixer with a damaged cord or plug, or if the appliance malfunctions or has been damaged in any way.
- Do not immerse the motor unit in water or any other liquid.
- This appliance is intended for commercial use. Do not use it for purposes other than its intended use.
- Supervise children and individuals with reduced physical, sensory, or mental capabilities when near the appliance.
- Only use original GGM Gastro accessories and spare parts.
- Do not overload the mixer. Adhere to the recommended capacities for different ingredients.
3. Package Contents
Upon unpacking, verify that all components are present and undamaged:
- GGM Gastro PRMH20 Planetary Mixer Unit
- 20-Liter Stainless Steel Mixing Bowl
- Dough Hook
- Flat Beater
- Wire Whip

Figure 3.1: GGM Gastro PRMH20 Planetary Mixer with its three standard mixing accessories.

Figure 3.2: Dough Hook. Ideal for heavy doughs like bread or pizza dough.

Figure 3.3: Flat Beater. Suitable for medium-heavy mixtures such as batters, mashed potatoes, or icings.

Figure 3.4: Wire Whip. Best for light mixtures like egg whites, whipped cream, or light batters.
4. Setup
4.1 Unpacking and Placement
- Carefully remove the mixer and all accessories from the packaging.
- Place the mixer on a sturdy, level, and clean surface capable of supporting its weight and the weight of ingredients. Ensure there is adequate space around the mixer for ventilation and operation.
- Wipe down the exterior of the mixer and wash the mixing bowl and accessories with warm, soapy water before first use. Rinse thoroughly and dry completely.

Figure 4.1: Mixer dimensions for proper placement. (Width: 520mm, Depth: 420mm, Height: 760mm)
4.2 Electrical Connection
- Ensure the power supply matches the mixer's requirements: 230V / 1N/PE / 50 Hz.
- Plug the mixer into a grounded electrical outlet.
4.3 Attaching the Mixing Bowl and Accessories
- Ensure the mixer is unplugged and the speed control is set to 'OFF'.
- Lower the bowl support by turning the handle counter-clockwise.
- Place the mixing bowl onto the bowl support pins and rotate it slightly to secure.
- Select the desired accessory (dough hook, flat beater, or wire whip). Align the accessory shaft with the attachment point on the mixer head and push upwards, then rotate to lock it into place.
- Raise the bowl support by turning the handle clockwise until the bowl is securely in position.
5. Operating Instructions
5.1 Control Panel
The mixer features a simple control panel, typically including an ON/OFF switch and a speed selector.
- ON/OFF Switch: Used to start and stop the mixer.
- Speed Selector: Allows you to choose between 3 speed levels (low, medium, high) depending on the mixing task and ingredients.
5.2 Mixing Process
- Ensure the mixer is properly set up with the bowl and desired accessory.
- Add your ingredients to the mixing bowl. Do not exceed the maximum capacity of 20 liters. For bread dough, use smaller quantities as indicated in the usage table.
- Select the appropriate speed setting based on the type of ingredient and accessory being used. Refer to the usage table below for guidance.
- Turn the mixer ON.
- Monitor the mixing process. If necessary, stop the mixer, scrape down the sides of the bowl, and restart.
- Once mixing is complete, turn the mixer OFF and unplug it from the power outlet.
- Lower the bowl support and remove the mixing bowl and accessory for cleaning.
5.3 Recommended Usage and Capacities
The following table provides guidelines for using the different accessories and speed settings with various products. Adhering to these recommendations will ensure optimal performance and extend the life of your mixer.

Figure 5.1: Usage Table for GGM Gastro Planetary Mixers (PRMH20 is included).
Note: The table indicates maximum input values for various products. For PRMH20, the maximum capacity for bread dough is 3 kg, and for pizza dough, it is 5 kg. Always ensure the dough consistency is appropriate for the mixer's capacity.
6. Maintenance and Cleaning
Regular cleaning and maintenance are crucial for the longevity and hygienic operation of your mixer.
- Always unplug the mixer before cleaning.
- Remove the mixing bowl and accessory immediately after use. Wash them with warm, soapy water, rinse thoroughly, and dry completely. These parts are typically dishwasher safe, but hand washing is recommended to preserve their finish.
- Wipe down the exterior of the mixer unit (body and head) with a damp cloth. For stubborn stains, use a mild detergent. Do not use abrasive cleaners or scouring pads, as they can damage the finish.
- Never spray water directly onto the mixer's motor housing or immerse it in water.
- Ensure all parts are completely dry before reassembling or storing the mixer.
- Periodically check the power cord for any signs of damage. If damaged, contact a qualified technician for repair.
7. Troubleshooting
If you encounter issues with your GGM Gastro PRMH20 Planetary Mixer, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Mixer does not turn on. | Not plugged in; power outage; safety switch engaged; faulty power cord. | Check power connection; verify power supply; ensure bowl is correctly seated and safety guard is closed; inspect power cord for damage. |
| Unusual noise during operation. | Overload; improper accessory attachment; foreign object in bowl. | Reduce load; re-attach accessory correctly; check for obstructions. |
| Motor stops during operation. | Overload protection activated; power interruption. | Reduce ingredients; turn off and unplug, wait 15-20 minutes for motor to cool, then restart. |
| Ingredients not mixing properly. | Incorrect accessory for task; insufficient mixing time; too much or too little ingredient. | Refer to usage table for correct accessory/speed; extend mixing time; adjust ingredient quantities. |
If the problem persists after attempting these solutions, please contact GGM Gastro customer support or a qualified service technician.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | PRMH20 |
| Brand | GGM Gastro |
| Capacity | 20 Liters |
| Power | 750 Watts |
| Voltage | 230V / 1N/PE / 50 Hz |
| Dimensions (L x W x H) | 520 mm x 420 mm x 760 mm (approx. 20.5 x 16.5 x 29.9 inches) |
| Material | Stainless Steel (bowl), High-quality Plastic (body) |
| Control Type | Push-button |
| Special Feature | Planetary Gear |
9. Warranty and Support
GGM Gastro products are manufactured to high-quality standards. For warranty information, service, or technical support, please contact your point of purchase or visit the official GGM Gastro website. Keep your purchase receipt as proof of purchase for any warranty claims.
For spare parts availability, please contact GGM Gastro directly.