Main Pcb With Expansion Pcb - Viessmann Vitocal 300-G Pro Installation And Service Instructions For Contractors

Electrical connections

Main PCB with expansion PCB

Information regarding the connection values
The specified output is the recommended connected
■
load.
■ The total output of all components connected directly
to the heat pump control unit (e.g. pumps, valves,
message facilities, contactors) must not exceed
1000 W.
If the total output is < 1000 W, the individual rating of
a component (e.g. pump, valve, message facility,
contactor) can be greater than specified. However,
the breaking capacity of the corresponding relay
must not be exceeded.
The stated current indicates the max. switching cur-
■
rent of the switching contact (observe the total cur-
rent of 5 A).
■ Controls for external heat source and central fault
messages are unsuitable for safety LV.
F3
sXG sXF
Fig. 25
Set the required parameters during commissioning;
see from page 53.
(cont.)
sYS sYA
sXD sXS
Installation sequence
33