Viessmann Vitocal 300-G Installation And Service Instructions Manual page 87

Connection of electrical components
Room temperature sensor for separate cooling circuit
Equipment
Room temperature See the following
sensor for separate illustration
cooling circuit
A Terminals on PCB 3
B Room temperature sensor
(part no. 7408 012)
Central fault message
Equipment
Central fault mes- See the following
sage illustration
A Terminals on PCB 2
Connection Comments
ID
Sensor type: Ni 500
Connection Comments
ID
Zero volt contact, opened during
fault-free operation; never use this
contact for voltages < 42V
Breaking capacity: 230 V~; 4(2) A
Note
The contact issues a short pulse
when the power supply is switched
on. Observe the pulse when proces-
sing the message via communication
tools.
Installation sequence
(cont.)
Setting parameters (group)
No parameters need to be
set
Setting parameters (group)
No parameters need to be
set
87