12 Decommissioning the product
11.14 Draining the product
1.
Close the service valves of the product.
2.
Start check programme P.05.
Overview of the check programmes (→ Page 15)
3.
Open the drain valves.
11.15 Checking the admission pressure of the
expansion vessel
1.
Drain the product. (→ Page 28)
2.
Measure the pre-charge pressure of the expansion ves-
sel at the vessel valve.
Conditions: Pre-charge pressure < 0.075 MPa (0.75 bar)
▶
Top up the expansion vessel in accordance with the
static height of the heating installation, ideally with ni-
trogen, otherwise with air. Ensure that the drain valve is
open when topping up.
3.
If water escapes from the valve of the expansion
vessel, you must replace the expansion vessel
(→ Page 23).
4.
Fill and purge the heating installation. (→ Page 17)
11.16 Completing inspection and maintenance
work
1.
Check the gas connection pressure (gas flow pressure).
(→ Page 18)
2.
Check the CO₂ content. (→ Page 19)
11.17 Checking the product for leak-tightness
▶
Check that the product is leak-tight. (→ Page 19)
12 Decommissioning the product
▶
Switch off the product.
▶
Disconnect the product from the power mains.
▶
Close the gas isolator cock.
▶
Close the cold water stop valve.
▶
Drain the product. (→ Page 28)
13 Customer service
To ensure regular servicing, it is strongly recommended
that arrangements are made for a Maintenance Agreement.
Please contact Vaillant Service Solutions for further details:
Telephone: 0330 100 3461
28
Installation and maintenance instructions ecoFIT sustain 0020230529_02