Installing The Compact Thermal Module; Draining The Product; Checking The Pre-Charge Pressure For The Internal Expansion Vessel; Completing Inspection And Maintenance Work - Vaillant ecoTEC pro Installation And Maintenance Instructions Manual

11 Decommissioning

10.6

Installing the compact thermal module

7
6
5
4
1. Connect the compact thermal module (2) to the heat
exchanger (1).
2. Tighten the four nuts (7) in a cross-wise pattern until the
burner flange fits closely and uniformly onto the mating
surfaces (if a torque spanner is available, set at 6 Nm).
3. Connect the plugs (3) to (6) again.
4. Connect the gas line using a new seal. In the process,
secure the gas pipe against twisting.
5. Open the gas isolator cock.
6. Make sure that there are no leaks.
7. Check that the sealing ring in the air intake pipe is posi-
tioned correctly in the seal seat.
8. Reconnect the air intake pipe to the intake nozzle.
9. Secure the air intake pipe with the retaining screw.
10. Check the gas flow pressure.
10.7

Draining the product

1. Close the service valves of the product.
2. Start the check programme P.06 (diverter valve mid-
position).
3. Open the drain valves.
4. Make sure that the cap of the automatic air vent on
the internal pump is open so that the product can be
drained fully.
10.8 Checking the pre-charge pressure for the
internal expansion vessel
1. Close the service valves and drain the product.
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)
▶
Ideally, you should top up the expansion vessel with
nitrogen. Otherwise, top it up 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 27)
4. Fill the heating installation. (→ Page 19)
5. Purge the heating installation. (→ Page 20)
30
10.9 Completing inspection and maintenance
work
1
Once you have completed all maintenance work:
▶
Check the gas flow pressure. (→ Page 21)
2
▶
Check the CO₂ content and, if necessary, adjust it (air
index setting). (→ Page 22)
▶
If required, reset the maintenance interval. (→ Page 24)
11 Decommissioning
3
11.1

Temporarily decommissioning the product

▶
Press the on/off button.
◁
The display goes out.
▶
Close the gas isolator cock.
▶
On combination products and products with a connected
domestic hot water cylinder, you must also close the cold
water stop valve.
11.2

Decommissioning the product

▶
Press the on/off button.
◁
The display goes out.
▶
Disconnect the product from the power mains.
▶
Close the gas isolator cock.
▶
Close the cold water stop valve.
▶
Drain the product. (→ Page 30)

12 Recycling and disposal

Disposing of the packaging
▶
Dispose of the packaging correctly.
▶
Observe all relevant regulations.

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.
Vaillant Service Solutions: 0330 100 3461
Installation and maintenance instructions ecoTEC pro 0020209589_01