23
Overview of electrical connections in the heat pump control unit (type BW 351.B)
X2
X3
F1
X1
X31
X25
X24
F0
F4
F27
F8
F6
F13
F7
F11
F12
F14
F16
F20
193B
193C
F3
193A
F26
J4
J3
Fig. 12
A
Cross connect PCB: See page 31.
F1 Fuse 6.3 A (slow)
B
Expansion PCB on main PCB: See page 27.
C
Main PCB: See page 23.
F3 Fuse 6.3 A (slow)
D
Controller and sensor PCB: See page 33.
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.
Set the required parameters during commissioning:
See page 51 onwards.
Installation sequence
Electrical connection
(cont.)
5855006
Installation
