Unox OVEN - Inflow Water Hardness Too High - Cooking Cabinet Rust

⚠️ Caution / Monitor Closely
Warning: The information provided here is for educational purposes only. Working with commercial kitchen equipment involves high voltage, gas, and high temperatures. We strongly recommend contacting a certified service technician for any repairs. We are not responsible for any damage or injuries resulting from DIY repair attempts. This information is provided 'as is' without any guarantees of completeness or accuracy.

TLDR

On your CHEFTOP and BAKERTOP MIND.Maps™ unit, high inflow water hardness leads to scale buildup and cooking cabinet rust, impacting efficiency and longevity. This issue requires immediate water quality management to prevent further damage. Install a UNOX.Pure-RO reverse osmosis system to comply with specifications and polish any existing rust from steel surfaces.

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Technical Details

Repair Steps:

  1. Assess Current Water Quality: Perform a detailed analysis of your facility’s inflow water to determine its hardness and mineral content, comparing it against UNOX’s technical specifications provided in the oven’s manual.
  2. Install a UNOX.Pure-RO System: If the water quality is not compliant, immediately install a UNOX.Pure-RO reverse osmosis water treatment system. This system is engineered to provide the optimal water quality required for UNOX ovens, preventing scale and corrosion.
  3. Inspect and Clean Cooking Cabinet: Thoroughly inspect all internal steel surfaces of the cooking cabinet for any signs of existing rust, scale deposits, or discoloration.
  4. Polish Steel Surfaces: For any identified rust spots or tarnished areas, carefully clean and polish the affected steel surfaces using a commercial-grade stainless steel polish paste and a non-abrasive cloth. Ensure all residue is removed after polishing.
  5. Implement Regular Water Quality Monitoring and Maintenance: Establish a routine schedule for checking water filter integrity, replacing cartridges in the UNOX.Pure-RO system as recommended, and conducting periodic water quality tests to ensure continuous compliance and prevent future issues.

Common Questions:

Q: Why is water hardness critical for UNOX ovens?

A: High water hardness causes limescale buildup in the boiler and on heating elements, reducing efficiency, increasing energy consumption, and leading to premature component failure. It also contributes to rust in the cooking cabinet and can affect food quality.

Q: What is a UNOX.Pure-RO system and why is it recommended?

A: The UNOX.Pure-RO is a reverse osmosis water treatment system specifically designed to provide water quality that meets UNOX’s stringent specifications. It removes impurities and minerals that cause scale and corrosion, thereby protecting the oven and extending its lifespan.

Q: How often should I check my water quality?

A: It’s recommended to test your inflow water quality quarterly, or immediately if you notice changes in cooking performance, excessive scale buildup, or the appearance of rust. Adhere to the maintenance schedule for your UNOX.Pure-RO system components.

When to call a technician

Consider calling a certified technician if:

  • The error keeps coming back after you've tried the steps above.
  • You're not comfortable doing the checks or repairs yourself.
  • You notice unusual noise, smell, or behaviour.
  • Equipment is under warranty and you want official service.
  • You need the unit back in service quickly with minimal downtime.

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