68 Installation and maintenance instructions 0020308118_05
14 Decommissioning
14.1 Activate the standby mode
▶ Press briefly.
◁ The display goes out. The standby button continues
to light up.
◁ All heat demands are blocked, however the frost pro-
tection is active for the heating installation.
◁ A heat demand via the frost protection function ac-
tivates the product. The product then goes back into
standby mode.
◁ If a fault occurs that blocks the operation, this is
shown on the display.
14.2 Temporarily decommissioning
1. Press briefly.
◁ The display goes out.
2. Switch off the product at the switched fused spur box.
◁ The frost protection function is deactivated.
3. Close the gas stopcock.
4. On products with a connected domestic hot water cylin-
der, you must also close the cold-water isolation valve.
14.3 Permanently decommissioning
1. Drain the product. (→ Section 12.9)
2. Press briefly.
◁ The display goes out.
3. Completely disconnect the product from the power
supply and close all of the supply pipes to the product
(gas, water).
4. Check that the 230 V voltage is no longer present in
the product.
15 Disposing of the packaging
▶ Dispose of the packaging correctly.
▶ Observe all relevant regulations.
▶ For detailed information refer to www.vaillant.co.uk.