8 Installation instructions 8000020416_01
4.2 Inserting plug X12
▶ → Fig. 1.2 Insert plug X12 into connection terminal X12
on the interface PCB.
4.3 Plugging in the connection cable
▶ → Fig. 1.3 Plug the connection cable into slot X31 on the
interface PCB.
4.4 Connecting a third-party control to the
product
▶ → Fig. 1.4 Connect the third-party control to the connec-
tion terminals for plug X12. Observe the polarity of the
connections.
– Control signal for third-party control: Terminal OT
– Earth line: Terminal
4.5 Installing the product
1. Open the heat generator's electronics box.
2. → Fig. 1.5 Insert the product into the guides in the elec-
tronics box.
4.6 Connecting the product to the heat generator
▶ → Fig. 1.6 Plug the connection cable into slot X31 on the
heat generator's PCB.
4.7 Completing installation
1. Start up the product.
2. Check the installation of the interface.
Status LED Meaning
Lights up perman-
ently
No third-party control connected
Flashes rapidly No eBUS connection to the heat
generator
Flashes slowly The OpenTherm control is sending
incorrect information
Flashes Normal function, data traffic
between eBUS and OpenTherm
module
5 Disposing of the packaging
▶ Dispose of the packaging correctly.
▶ Observe all relevant regulations.
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