Start-Up; Heating The Cylinder; No Domestic Hot Water Expansion Vessel Installed; Care And Maintenance - Vaillant 305827 Installation Instructions Manual

5

Start-up

5 Start-up
5.1

Heating the cylinder

When heating the cylinder, the installed non-return
valve (10) prevents the heated water from flowing
back into the cold water supply line. The excess pres-
sure in the cylinder, which is caused by the heating,
is reduced by opening the expansion relief valve (11).
a
Danger!
Risk of scalding
> When opening the expansion relief
valve by heating up the cylinder and by
actuating the venting cap (1), hot water
escapes at the hopper drain (4).
5.2 No domestic hot water expansion
vessel installed
If no domestic hot water expansion vessel is
installed, a water volume based on the water content
of the domestic hot water cylinder and the tempera-
ture boost must escape from the hopper drain (4)
on the expansion relief valve (11) when the domestic
hot water cylinder is heated.
6
6

Care and maintenance

6.1

Caring for the product

Caution.
b
Risk of material damage caused by
unsuitable cleaning agents.
> Do not use sprays, scouring agents,
detergents, solvents or cleaning agents
that contain chlorine.
> Clean the casing with a damp cloth and a little
solventfree soap.
6.2 Checking that the safety assembly is
working correctly
1. Check that the expansion relief valve (11) is work-
ing correctly twice a year and each time the
domestic hot water cylinder is started up.
2. Turn the venting cap (1) in the direction of the
arrow that is marked on the cap.
¬ Water must flow into the hopper (3) here.
¬ The expansion relief valve (11) must then be
leak-tight again.
Conditions: The expansion relief valve permanently drips
> Clean the expansion relief valve.
3. Check that the non-return valve (10) is working
correctly once a year.
4. Close the isolation valve (7).
5. Unscrew the check plug (8).
Installation instructions 0020230764_00