Overview Of Electrical Connections In The Heat Pump Control Unit (Type Bw 301.A); Main Pcb (Function Components 230 V~) - Viessmann Vitocal 300-G Series Installation And Service Instructions Manual

Electrical connection

Overview of electrical connections in the heat pump control unit (type BW 301.A)

F6 F11 F16 F26
X24
F8 F7 F14
F27 F13
F4
F12 F20
X25
193C
193A
193B X31
Fig. 12
Cross connect PCB: See page 28.
A
F1 Fuse 6.3 A (slow)
Expansion PCB on main PCB: See page 25.
B

Main PCB (function components 230 V~)

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.
(cont.)
F3
J4
J3
X3
X2
X1
F1
Main PCB: See page 21.
C
F3 Fuse 6.3 A (slow)
Controller and sensor PCB: See page 31.
D
Set the required parameters during commissioning:
See page 50 onwards.
Installation sequence
21