Vaillant ecoTEC plus VU 6/5-5 Series Installation And Maintenance Instructions Manual page 49

13.6.6 Replacing the expansion vessel
1. Drain the product. (→ Page 44)
2. Undo the screwed connection (4).
3. Remove both screws (1) on the support plate (2).
4. Remove the support plate (2).
5. Pull out the expansion vessel (3) towards the front.
6. Insert the new expansion vessel into the product.
7. Screw the new expansion vessel to the water connec-
tion. Use a new seal for this.
8. Attach the support plate using both screws (1).
9. Fill and purge the product and, if necessary, the heat-
ing installation. (→ Page 35)
13.6.7 Replacing the PCB or the display
Note
If you only replace one component, when the
product is switched on, the new component ad-
opts the parameters that were previously set from
the component that was not replaced.
1. Open the electronics box. (→ Page 28)
2. Replace the PCB or display according to the set-up
and installation instructions supplied.
3. If you are replacing the PCB, remove the coding res-
istor (1) (plug X24) from the old PCB and plug the plug
onto the new PCB.
4. Close the electronics box.
13.6.8 Replacing the PCB and the display
1. Open the electronics box. (→ Page 28)
2. Replace the PCB and display according to the set-up
and installation instructions supplied.
0020244997_07 Installation and maintenance instructions
1
2
3. Remove the coding resistor (1) (plug X24) from the old
PCB and plug the plug into the new PCB.
3
4. Close the electronics box.
5. Press the product's on/off button. (→ Page 32)
4
◁
After switching on, the product switches directly to
the menu to select the language. The factory-set
language setting is English.
6. Select the required language and confirm by pressing
.
◁
You are automatically taken to D.093 to set the
device specific number.
7. Set the correct value for the relevant product type in
accordance with the table below and confirm by press-
ing .
Product type number
VU 126/5-5 (H-GB) ecoTEC
plus 612
VU 156/5-5 (H-GB) ecoTEC
plus 615
VU 186/5-5 (H-GB) ecoTEC
plus 618
VU 186/5-5 (P-GB) ecoTEC
plus 618
VU 246/5-5 (H-GB) ecoTEC
plus 624
VU 306/5-5 (H-GB) ecoTEC
plus 630
VU 306/5-5 (P-GB) ecoTEC
plus 630
VU 386/5-5 (H-GB) ecoTEC
plus 637
VUW 196/5-5 (H-GB) ecoTEC
plus 825
VUW 246/5-5 (H-GB) ecoTEC
plus 832
VUW 246/5-5 (P-GB) ecoTEC
1
plus 832
VUW 306/5-5 (H-GB) ecoTEC
plus 835
VUW 286/5-5 (H-GB) ecoTEC
plus 838
◁
The electronics are now set to the product type and
the parameters of all diagnostics codes are set to
factory settings.
◁
The installation assistant starts.
8. Make the system-specific settings.
1
1
3
4
4
9
14
14
20
6
10
10
13
17
49