Vaillant ecoFIT sustain 825, Инструкция по установке и обслуживанию

Страница: 24 / 48

11 Inspection and maintenance
24
Installation and maintenance instructions ecoFIT sustain 0020230529_04
10.6.7 Replacing the PCB for the user interface
B
C
C
D
A
A
1. Open the electronics box. ( → Page 13)
2. Pull the plug out of the PCB.
3. Undo the clips on the PCB.
4. Remove the PCB.
5. Install the new PCB in such a way that it clicks into the
groove at the bottom and into the clip at the top.
6. Plug in the PCB plug.
7. Close the electronics box.
10.6.8 Replacing the expansion relief valve
1
2
1. Remove the clip
(2)
.
2. Remove the expansion relief valve.
3. Fit the new expansion relief valve with a new O-ring.
4. Reattach the clip
(2)
.
10.6.9 Replacing the volume flow sensor
1
B
A
1. Pull out the plug.
2. Remove the volume flow sensor
(1)
.
3. Install the new volume flow sensor.
4. Plug in the plug.
10.6.10 Replace the pressure sensor
1
2
1. Pull out the plug.
2. Remove the clip
(1)
.
3. Remove the pressure sensor
(2)
.
4. Install the new pressure sensor.
5. Reattach the clip
(1)
.
10.7 Checking the product for leak-tightness
▶
Check that the product is leak-tight. ( → Page 19)
11 Inspection and maintenance
11.1 Using original seals
If you replace components, use only the enclosed original
seals; additional sealing materials are not required.
11.2 Observing inspection and maintenance
intervals
▶
Adhere to the minimum inspection and maintenance in-
tervals. The inspection may require maintenance to be
carried out earlier, depending on the results.
– Inspection and maintenance work ( → Appendix)