Decommissioning the product 12
0020230533_01 ecoFIT pure Installation and maintenance instructions 27
11.12 Draining the product
1. Close the service valves of the product.
2. Start check programme P.05.
Overview of the check programmes (→ Page 14)
3. Open the drain valves.
11.13 Checking the admission pressure of the
expansion vessel
1. Drain the product. (→ Page 27)
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 22).
4. Fill and purge the heating installation. (→ Page 16)
11.14 Completing inspection and maintenance
work
1. Check the gas connection pressure (gas flow pressure).
(→ Page 17)
2. Check the CO₂ content. (→ Page 18)
11.15 Checking the product for leak-tightness
▶ Check that the product is leak-tight. (→ Page 18)
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 27)
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
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