67
Terminals
Function
Explanation
LP1 X3.12
LP1 X3.13
or at H1 ex-
ternal ex-
tension
Signal "External demand"
(external starting of com-
pressor and pumps, mixer
in control operation or
OPEN, changeover of op-
erating mode 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 swimming pool water heating,
cascade or external set value default
can alternatively be connected via H1
external extension (see installation in-
structions "H1 external extension").
■ If a swimming pool heating facility is con-
nected to H1 external extension, no oth-
er external function can be connected to
H1 external extension.
K2 220.2
K2 220.3
Only for 2-stage heat
pumps:
Blocking compressor 2 in
connection with DHW
heating
Connection, see separate "Connection
and wiring diagram" sheet 20.
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
Connection in series with the secondary
pump (terminal 211.2 on main PCB), see
separate "Connection and wiring diagram"
sheet 20.
Installation sequence
Overview of electrical connections
(cont.)
5848 164 GB
Installation
Содержание BW 301.A090
Страница 44: ...44 A Frame screw Installation sequence Siting the heat pump cont 5848 164 GB...
Страница 157: ...157 5848 164 GB...
Страница 158: ...158 5848 164 GB...
Страница 159: ...159 5848 164 GB...