For routine instrument cleaning, the 45-degree or horizontal orientation is acceptable. For surgical instruments or instances where increased cleaning efficacy is required, the horizontal orientation is preferred. The Miele G7781 Thermodisinfector has a built-in water softener. The resin in the water softener removes calcium and other positively-charged ions from the water to reduce scale build up and improve detergent action. Periodically, a salt solution or brine needs to be run through the water softener resin to remove the calcium from the resin and replace the calcium ions with sodium ions.
Some salts contain insoluble additives such as calcium carbonate to enhance the flow of the salt.
This would cause calcium carbonate to build up in the water softener resin and is not acceptable. This quantity must completely dissolve during the regenerating cycle. After testing several salts, we found that Morton Kosher Salt met all the above criteria. May not be available in some locations. Morton Kosher Salt is a less expensive alternative to the salt routinely supplied by Miele for regeneration of the G7781 water softener resin.