Connection Of Low Water Cut-Off Device - Viessmann Vitotronic 300 GW6B Installation Instructions Manual

Electrical Connections

Connection of Low Water Cut-off Device

Legend
aBÖ Connection for external equipment.
Low water cut-off (typical)
A
36
Vitotronic 300, GW6B Installation and Service
1. Remove jumper between terminals 21(L) and 22(L).
2. Make connection for switching contact at terminal
(LWCO) 21(L) and 22(L).
3. Power supply for low water cut-off device made at an
available terminal 14, 15, 16 or 17 (L, N, G)
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.