44
Terminals
Function
Explanation
LP1 X3.2
LP1 X3.14
or at external
H1 extension
"External blocking" signal (external
blocking of compressor and pumps;
mixer in control mode or CLOSE)
Note
The system may no longer be pro-
tected against frost.
Requires floating
N/O
contact:
■
Closed: Power-OFF enabled
■
Open: No power-OFF
■
Breaking capacity 230 V~, 2 mA
Note
■
These and further external functions, such as swim-
ming pool water heating, cascade or external set value
default can alternatively be connected via external H1
extension (see installation instructions "External H1 ex-
tension").
■
If a swimming pool heating facility is connected to the
external H1 extension,
no
other external function can
be connected to the external H1 extension.
LP1 X3.3
LP1 X3.4
Flow switch for well circuit or jump-
er
Requires floating contact:
■
Closed: Heat pump in operation
■
Open: Heat pump shut down
■
Breaking capacity 230 V~, 0.15 A
No
jumper should be installed if a flow switch is connec-
ted.
LP1 X3.6
LP1 X3.7
G
Power-OFF or jumper
Requires floating
N/C
contact:
■
Closed: No power-OFF (safety chain has continuity)
■
Open: Power-OFF enabled
■
Breaking capacity 230 V~, 0.15 A
There must not be a jumper when the power-OFF con-
tact has been connected.
Note
■
No parameters need to be set.
■
The compressor is "forced" off as soon as the contact
opens.
■
The power supply utility's blocking signal (power-OFF)
causes the supply voltage to the relevant components
to be switched off (subject to power supply utility).
■
For the instantaneous heating water heater, the stages
to be switched off can be selected (parameter
"Output
for instantaneous heating water heater with power-
OFF"
).
■
The power supply for the heat pump control unit
(3 x 1.5 mm
2
) and the cable for the power-OFF signal
can be combined in a single 5-core cable.
■
For further information regarding power-OFF, see
chapter "Power supply".
LP1 X3.8
LP1 X3.9
P
Primary circuit pressure switch
and/or frost stat
or
Jumper
Requires floating contact:
■
Closed: Safety chain has continuity
■
Open: Safety chain interrupted; heat pump shut down
■
Breaking capacity 230 V~, 0.15 A
Connection:
■
Connected in series if both safety components are in-
stalled
■
Insert jumper if no safety components are installed
Installation sequence
Overview of electrical connections
(cont.)
5549 984 GB
Installation
Summary of Contents for KWT BW 301.B090
Page 99: ...99 5549 984 GB...
