Dražice Manuals & User Guides

Družstevní závody Dražice (DZD) is the largest manufacturer of water heaters in the Czech Republic and a prominent name in thermal technology across Europe. Founded with traditions dating back to 1956, the company specializes in the production of electric, combined, and indirect water heaters, as well as stationary accumulation tanks. Now a part of the NIBE Group, Dražice continues to export its products to over twenty countries, delivering reliable hot water solutions for residential and commercial use.

The brand is renowned for its proprietary enameling process, which significantly extends the service life of its tanks by protecting against corrosion. Dražice offers a wide portfolio of vertical and horizontal heaters, solar storage solutions, and heating elements, all designed with a focus on energy efficiency and operational safety.

• What is the recommended temperature setting for Dražice water heaters?

  The manufacturer typically recommends setting the thermostat to approximately 60°C (often marked as 'OPTIMUM' or 'ECO'). This setting balances energy efficiency with the prevention of limescale and legionella bacteria.

• Can I operate the water heater without water?

  No, operating the water heater without water can cause irreversible damage to the heating element and is not covered by the warranty. Always ensure the tank is filled before switching on the power.

• How often should the safety valve be checked?

  The safety valve should be checked at least once a month and after any shutdown longer than 5 days. You can check it by manually activating the membrane to ensure water drains through the outlet pipe.

• Where can I find the serial number for service requests?

  The type and serial number are located on the product's performance plate (rating label), usually found on the casing of the water heater.