0020230533_06 ecoFIT pure Installation and maintenance instructions 39
13.5.6 Replacing the PCB
1. Open the electronics box. (→ Page 23)
2. Pull all of the plugs out from 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 plugs.
7. Close the electronics box.
13.5.7 Replacing the PCB for the user interface
1. Open the electronics box. (→ Page 23)
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.
13.5.8 Replacing the expansion relief valve
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).
13.5.9 Replace the pressure sensor
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).
13.6 Checking the product for leak-tightness
▶ Check that the product is leak-tight. (→ Page 31)
14 Decommissioning the product
▶ Switch off the product.
▶ Disconnect the product from the electrical installation.
▶ Close the gas stopcock.
▶ Close the cold-water isolation valve.
▶ Drain the product. (→ Page 36)
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