Blocking input
Caution
Only suitable for potential-free contacts (dry contact).
Important
First remove the bridge if this input is used.
The boiler has a blocking input. A potential-free contact can be connected
to the BL terminals of the connector. If the contact is opened, the boiler will
be blocked.
Change the function of the input using parameter AP001. This parameter
has the following 3 configuration options:
Complete blocking: no frost protection with the outdoor sensor and no
boiler frost protection (pump does not start and burner does not start)
Partial blocking: boiler frost protection (pump starts when the
temperature of the heat exchanger is < 6°C and the burner starts when
the temperature of the heat exchanger is < 3°C)
Lock out: no frost protection with outdoor sensor and partial boiler frost
protection (pump starts when the temperature of the heat exchanger is <
6°C, the burner does not start when the temperature of the heat
exchanger is < 3°C).
Release input
Caution
Only suitable for potential-free contacts (dry contact).
The boiler has a release input. A potential-free contact can be connected
to the RL terminals of the connector.
If the contact is closed during a heat demand, the boiler will be blocked
immediately.
If the contact is closed when there is no heat demand, the boiler will be
blocked after a waiting time.
Change the waiting time of the input using parameter AP008.
5.6.3
The SCB-01 expansion PCB
The SCB-01 has the following features:
Two potential free contacts for status notifications
0–10 V output connection for a PWM system pump
Expansion PCBs are automatically recognised by the control unit of the
boiler. If expansion PCBs are removed, the boiler will show an error code.
To resolve this error, an auto-detect must be carried out after removal.
Connecting status notifications
The two potential-free contacts, Status, can be configured as required.
Depending on the setting, a particular status can be transmitted by the
boiler.
Fig.51
Blocking input
AD-3000972-02
BL
Fig.52
Release input
AD-3001303-01
RL
Fig.53
SCB-01 PCB
AD-3001514-01
No
C
Nc
Status
No
C
Nc
Status
+
0
0-10
5 Installation
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