Viessmann Vitocrossal 300 CA3 2.5 Installation And Service Instructions Manual page 31

Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Electrical Connections
*
A
Legend
Low water cut-off (typical)
A
(continued)
*
Connection of Low Water Cut-off Device
1. Remove jumper between terminals 15(L) and 16(L).
2. Make connection for (LWCO) switching contact at
terminals 15(L) and 16(L).
3. Power supply for low water cut-off device made at
an available (L, N, G), terminals 12, 13 or 14.
CAUTION
The diagram shown is only a simplified conceptual
drawing of a typical low water cut off (LWCO) device.
Refer to the manual specific to the device for
interconnection details.
*Factory Installed high limit temperature switches
(refer to page 107 for additional information).
Installation
31