tenance
— English Variomat 1 — 06.07.2016 – Rev. B
Risk of injury due to pressurised liquid
If installation, removal or maintenance work is not carried out correctly, there is a risk of burns and other injuries at the connection
points, if pressurised hot water or hot steam suddenly escapes.
• Ensure proper installation, removal or maintenance work.
• Ensure that the system is de-pressurised before performing installation, removal or maintenance work at the connection points.
Clean the primary tank and the secondary tanks from sludge deposits.
1. Switch to Stop mode.
2. Empty the tanks.
– Open the "FD" feed and drain cocks and empty the tanks completely from water.
3. Remove the hose connection between the primary tank and the device and the secondary tank, if provided.
4. Remove the lower vessel covers from the tanks.
5. Remove any sludge from the covers and the spaces between the diaphragms and the tanks.
• Check the diaphragms for tearing.
• Check the tank interior walls for corrosion.
6. Reinstall the covers on the tanks.
7. Reinstall the flange connection betweens the primary tank and the device and the secondary tank, if provided.
8. Close the "FD" feed and drain cocks at the tanks.
9. Use the "FD" feed and drain cock to fill the primary tank with water, see chapter 7.4 "Filling the tanks with water" on page 40 .
10. Switch to Automatic mode.
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