Connections To Safety Equipment Abö; Connections To Terminal Aba - Viessmann VITOTRONIC 100 GC1B Installation And Service Instructions Manual

Installation Sequence
Connections to Safety Equipment
Legend
A DIN rail
B Low water cutoff
C Other safety controls

Connections to Terminal aBA

Legend
A Dry contact
B DIN rail
58
150
A
B
A
Vitotronic 100, GC1B Installation and Service
1. Connect the external safety equipment in series.
External shut-off
1. Remove jumper between terminals 19 and 20.
2. Connect dry contact. Controlled switch-off takes place
when the contact is opened.
WARNING
The terminals should be used for safety switch-off
purposes only (e.g. through a high limit thermostat).
During switch-off, there is no frost protection of the
heating system and the boiler is not kept at the minimum
boiler water temperature.
Note: The heating system has no frost protection while it
is blocked. The boiler is not held at the lower boiler
water temperature.