37
Terminals
Function
Explanation
Note
■
No parameters need to be set
■
No
jumper should be installed if a power-OFF contact
is connected.
■
The compressor is "forced" off as soon as the contact
opens.
■
The power-OFF signal switches off the power supply
to the relevant components, subject to the power sup-
ply utility.
■
For the instantaneous heating water heater, the
stages to be switched off can be selected (
"Output
for instant. heating water heater at power-OFF
790A"
).
■
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.
In connection with Smart Grid:
Do
not
connect the power-OFF signal.
Do
not
remove jumper.
X3.8
X3.9
Requires floating contact:
■
Closed: Safety chain has continuity
■
Open: Safety chain interrupted; heat pump shut down
■
Breaking capacity 230 V~, 0.15 A
■
Connected in series if 2 safety components are instal-
led
■
Insert jumper if no safety components are instal-
led.
P
Pressure switch, primary circuit
and/or
Frost stat
or
Jumper
X3.10
X3.11
Fault message, lag heat pump in a
cascade
or
Jumper
Requires floating contact:
■
Closed: No fault
■
Open: Fault
■
Breaking capacity 230 V~, 0.15 A
No jumper should be installed if a message contact is
connected.
X3.12
X3.13
"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 contact:
■
Closed: Demand
■
Open: No demand
■
Breaking capacity 230 V~, 2 mA
Note
These and further external functions (e.g. provision of
external set values) can alternatively be connected via
the external EA1 extension.
See "EA1 extension" installation instructions
X3.17
X3.18
Fuse F1 6.3 A (slow)
X3.18
Heat pump control unit power supply:
Phase L1
X1.1 Earth conductor connection
X2.1 Neutral conductor connection
Power supply 230 V~
Installation sequence
Electrical connection
(cont.)
5516461
Installation
Summary of Contents for BW 301.B06
Page 69: ...69 Fig 49 Maintenance Opening the casing door 5516461 Maintenance...
Page 76: ...76 Maintenance Condensation and moisture in the heat pump cont 5516461 Maintenance...
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Page 88: ...88 Parts lists type BWC 301 B Hydraulics type BWC 301 B cont 5516461 Components...
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