Viessmann VITOCAL 242-G Installation And Service Instructions Manual page 69

Connecting the external electrical components
When using a separate heating circuit pump
Temperature limiter installation
instructions
Central fault message
A Terminals in the control panel
B Acoustic alarm
C Optical alarm
D Alternatively, the neutral conduc-
tor can also be connected across
terminals X60.13 or X60.16
Pressure switch, brine circuit
A Terminals in the control panel
B Brine pressure switch
C Jumper
Installation sequence
(cont.)
Breaking capacity: 230 V~, 0.7 A
Note
This contact is not at zero volt.
230 V~ will be present if there is a
fault.
If no brine pressure switch is con-
nected, always connect the jumper
(in the pack) downstream of the power
supply. Always check the rotating field
at the phase monitor prior to inserting
the jumper.
The contact must be able to switch at
least 230 V and 0.7 A.
Note
Only use components in the external
safety chain that do not automatically
re-start (reset). Where required,
ensure this through a mechanical
interlock.
69