1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Kaldewei Robusta 90 Liter Wood and Coal Water Heater. Please read this manual thoroughly before installation and use, and keep it for future reference. Proper adherence to these instructions will ensure optimal performance and longevity of your appliance.
2. Safety Instructions
Always prioritize safety when operating any heating appliance. Failure to follow these safety guidelines can result in property damage, serious injury, or death.
- Installation: Installation must be performed by a qualified professional in accordance with all local and national building and safety codes. Ensure adequate ventilation and proper chimney connection.
- Fuel: Use only recommended fuels: natural wood and coal briquettes. Do not use flammable liquids, garbage, or treated wood as fuel.
- Clearances: Maintain proper clearances from combustible materials as specified by local regulations and the appliance's technical data.
- Carbon Monoxide: Install carbon monoxide detectors in your home. This appliance produces carbon monoxide, which is odorless and deadly.
- Hot Surfaces: The exterior surfaces of the heater will become extremely hot during operation. Keep children, pets, and combustible materials away from the appliance. Use heat-resistant gloves when handling fuel or adjusting controls.
- Ash Disposal: Dispose of ashes in a metal container with a tight-fitting lid, away from combustible materials.
- Water Pressure: Ensure the water system connected to the boiler is capable of handling the pressure and temperature generated. Install a pressure relief valve if not already present.
- Maintenance: Regular inspection and maintenance are crucial for safe operation. Refer to the maintenance section.
3. Setup and Installation
The Kaldewei Robusta water heater requires professional installation to ensure safety and compliance. The following steps outline the general installation process.
Figure 3.1: Front view of the Kaldewei Robusta 90 Liter Wood and Coal Water Heater, showing its cylindrical design, integrated shower arm, and lower combustion chamber door.
- Unpacking: Carefully unpack the water heater and inspect for any shipping damage. Retain all packaging materials until installation is complete and satisfactory.
- Location: Choose a suitable location that meets all local building codes for clearances to combustible materials and provides adequate ventilation. The floor must be capable of supporting the weight of the filled heater.
- Chimney Connection: Connect the heater to a properly sized and installed chimney or flue system. Ensure a tight and secure connection to prevent smoke and carbon monoxide leaks. The flue pipe diameter is approximately 96mm (refer to Figure 3.2, point 'c').
- Water Connections: Connect the water inlet and outlet pipes. The unit includes a hose coupling for water input and a mixer with a riser for the shower output. Ensure all connections are watertight.
- Pressure Relief Valve: Install a pressure relief valve on the hot water outlet line to prevent over-pressurization.
- Filling the Boiler: Before first use, fill the boiler with water. Open a hot water tap to allow air to escape until water flows steadily.
- Final Inspection: After all connections are made, perform a thorough inspection for leaks and ensure all safety devices are correctly installed and functioning.
Figure 3.2: Technical diagram of the Kaldewei Robusta 90 Liter Water Heater with key components and dimensions.
Key:
1. Water outlet tap
2. Flue gas outlet
3. Mixer and riser assembly
4. Combustion chamber door
5. Ash pan door
6. Water tank (enameled interior)
7. Shower head
8. Shower hose
9. Water inlet connection
a. Shower arm
b. Shower head holder
c. Flue pipe diameter (approx. 96mm)
d. Height to water outlet tap (approx. 110mm from top of base)
e. Water level
f. Firebox/grate level
Dimensions: Total height approx. 1725mm, height to top of water tank approx. 1425mm, base height approx. 390mm, base diameter approx. 360mm.
4. Operating Instructions
Follow these steps for safe and effective operation of your water heater.
- Fueling: Open the combustion chamber door (4 in Figure 3.2). Place appropriate amounts of natural wood or coal briquettes onto the grate. Do not overfill.
- Ignition: Use kindling and a fire starter to ignite the fuel. Once the fire is established, close the combustion chamber door.
- Air Control: Adjust the air intake on the combustion chamber door to control the burn rate and heat output. More air will result in a hotter, faster burn.
- Water Heating: The heat from the combustion chamber will transfer to the water in the boiler (6 in Figure 3.2). The time required to heat the water will depend on the amount and type of fuel used, and the desired temperature.
- Hot Water Usage: Once the water is heated, hot water can be drawn from the water outlet tap (1) or through the shower assembly (3, 7, 8).
- Refueling: When the fire dies down and more hot water is needed, carefully open the combustion chamber door and add more fuel. Be cautious of hot embers and smoke.
5. Maintenance
Regular maintenance is essential for the safe and efficient operation of your Kaldewei Robusta water heater.
- Ash Removal: Regularly remove ashes from the ash pan (accessible via door 5 in Figure 3.2). Excessive ash buildup can impede airflow and reduce efficiency. Ensure ashes are cool before disposal.
- Chimney Cleaning: Have your chimney or flue system inspected and cleaned annually by a certified chimney sweep to prevent creosote buildup and ensure proper draft.
- Appliance Inspection: Periodically inspect the heater for any signs of wear, damage, or leaks. Check seals around doors and connections.
- Water System Check: Ensure the pressure relief valve is functioning correctly. Periodically check for any leaks in the water connections.
- Exterior Cleaning: Clean the exterior of the heater with a damp cloth when cool. Do not use abrasive cleaners.
6. Troubleshooting
This section addresses common issues you might encounter with your water heater.
| Problem | Possible Cause | Solution |
|---|---|---|
| Poor heating performance | Insufficient fuel; poor draft; excessive ash buildup; low-quality fuel. | Add more fuel; check chimney for blockages; empty ash pan; use recommended fuel. |
| Smoke entering room | Blocked chimney; improper door seal; negative room pressure. | Have chimney inspected/cleaned; check and replace door seals; ensure adequate room ventilation. |
| Water leaks | Loose connections; damaged seals; corrosion. | Tighten connections; replace damaged seals; contact a qualified technician for corrosion issues. |
| Fire goes out quickly | Insufficient air supply; wet fuel. | Adjust air intake; ensure fuel is dry and seasoned. |
If you encounter problems not listed here or if solutions do not resolve the issue, contact a qualified service technician.
7. Specifications
Key technical specifications for the Kaldewei Robusta 90 Liter Wood and Coal Water Heater.
- Model: Kaldewei Robusta
- Capacity: 90 Liters (boiler)
- Fuel Type: Natural Wood, Coal Briquettes
- Interior: Enameled
- Exterior: Enameled
- Included Components: Boiler, Hose Coupling, Enameled Interior and Exterior, Mixer and Riser, Carbon Base
- Manufacturer: Kaldewei
- Part Number: 673073000000
- ASIN: B00E3RMAKO
- First Available Date: January 15, 2020
- Approximate Dimensions (refer to Figure 3.2):
- Total Height: 1725 mm
- Height to Top of Water Tank: 1425 mm
- Base Height: 390 mm
- Base Diameter: 360 mm
- Flue Pipe Diameter: 96 mm
8. Warranty and Support
For information regarding warranty coverage, technical support, or spare parts, please refer to the documentation provided with your purchase or contact Kaldewei customer service directly. Contact details are typically available on the manufacturer's official website or on the product packaging.