Viessmann Vitocal 300-G Installation And Service Instructions Manual page 83

Connection of electrical components
A Connection inside the heat pump
B KM BUS
C External extension H1
D Three-way diverter valve "swim-
ming pool"
Power-OFF
The signal from the power-OFF contact has the following effects:
Message to the control unit.
Switching off the supply voltage of the relevant component (subject to the
power supply utility).
Equipment
Power-OFF See the following
illustration
E Circulation pump for swimming
pool water heating (accessory)
F Swimming pool thermostat (zero
volt N/O, accessory)
Connection Comments
ID
Requires a zero volt N/C contact,
breaking capacity AC 230V 0.5A; re-
move jumper
Installation sequence
(cont.)
Setting parameters (group)
No parameters need to be
set
83