41
Clamps
Function
Explanation
X3.10
X3.11
Fault message, lag heat pump in a
cascade
or
Jumper
Requires floating contact:
■
Closed: no faults
■
Open: fault
■
Breaking capacity 230 V~, 0.15 A
No jumper should be installed if a message contact is
connected.
LP1 X3.12
LP1 X3.13
or at external
EA1 extension
"External demand" signal (external
starting of compressor and pumps;
mixer in control mode or OPEN,
changeover of the operating status
of several system components)
Requires floating
N/O
contact:
■
Closed: demand
■
Open: no demand
■
Breaking capacity 230 V, 2 mA
Note
■
These and further external functions, such as provision
of external set values, can alternatively be connected
via external EA1 extension.
Installation instructions "EA1 extension"
STB 1
STB 2
High limit safety cut-out (max.
70 °C) for stopping the secondary
pump in conjunction with an exter-
nal heat generator
Connected in series to the secondary pump (terminal
211.2 on main PCB), see separate "Connection and wir-
ing diagram".
Installation sequence
Electrical connections
(cont.)
5787 232 GB
Installation
Summary of Contents for BW 301.C090
Page 91: ...91 5787 232 GB...
