Input Release (Rl); Circulation Pump (Pump); Connection Options For The Optional 0 - 10 V Control Pcb (If-01); Connection Status (Nc) - DeDietrich C230 ECO-A 120 Installation, Operating And Service Manual

8 Control and electrical connections
8.5

Connection options for the optional 0 - 10 V control PCB (IF-01)

Fig. 12 Jumper 2
42
8.4.5

Input release (RL)

The boiler is also equipped with an input release so that the burner
can be released/shutdown. This input can be used in combination with
the limit switches on flue gas throttle valves, hydraulic control valves,
safety interlocks, etc. This input relates to the RL terminals of terminal
strip X6.
8.4.6

Circulation pump (Pump)

A pump with the following specifications can be connected:

On/off pump with a mains voltage of 120 VAC (60 Hz) and 300 VA
(maximum).
Connect the pump to the Pump terminals of terminal strip X4. The
post-circulation time of the circulation pump at the end of a heat
demand can be set according to requirements by means of a program
option at user level, see Section 8.1.6.

8.5.1 Connection status (Nc)

If the boiler locks out, a relay is de-energized and the alarm
can be transmitted via a potential-free contact (maximum 120
V, 1 A) on terminals Nc and C of terminal strip X4.

8.5.2 OTm connection

The interface uses OpenTherm to communicate with the boiler
control. The OTm connection on terminal strip X5 must
therefore be connected to the OpenTherm OT input of the
boiler control.
C230 ECO-A