Modulating Controls General; Modulating Room Control - DeDietrich C230 ECO-A 120 Installation, Operating And Service Manual

C230 ECO-A
8.1.2

Modulating controls general

The modulating nature of the boiler is used to maximum effect with a
modulating controller. If the controller demands heat, the boiler
supplies the heat output. If the controller demands a flow temperature,
the boiler modulates to this value. This increases the number of
operating hours and drastically reduces the number of starts.
Combined with the fixed gas/air mixture, this results in greater
efficiency. The C230 Eco-A can be connected to a modulating room
control, see section 8.1.3.
8.1.3

Modulating room control

The boiler is set up for communication via the OpenTherm protocol.
Modulating controllers can be connected according to the OpenTherm
protocol. The controller is mounted in a reference area. Connection is
made with a two-core cable to the On/off - OT terminals of terminal
strip X6 (not polarity sensitive).
8 Control and electrical connections
37