50
Terminals
Function
Explanation
X3.3
X3.4
Flow switch
Requires floating
N/O contact
(activa-
ted):
■ Closed: Heat pump in operation
■ Open: Heat pump shut down
■ Breaking capacity 230 V~, 0.15 A
■ Jumper is used in some devices.
■
No
jumper should be installed if a flow
switch is connected.
X3.6
X3.7
G
Power-OFF
Requires zero volt
N/C
contact:
■ Closed: No power-OFF (safety chain
has continuity)
■ Open: Power-OFF enabled
■ Breaking capacity 230 V~, 0.15 A
Note
■ No parameters need to be set
■ No jumper should be installed if a pow-
er-OFF contact is connected.
■ The compressor is "forced" off as soon
as the contact opens.
■ The power-OFF signal switches off the
supply voltage of the respective oper-
ating component (subject to the power
supply utility).
■ For the instantaneous heating water
heater, the stages to be switched off
can be selected (parameter "Output
instant.htg wtr 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 com-
bined in a single 5-core cable.
Installation sequence
Electrical connection
(cont.)
5546 273 GB
Содержание BW 351.A07
Страница 28: ...28 Removing the top panel 1 Installation sequence Siting the heat pump cont 5546 273 GB ...
Страница 88: ...88 Opening the casing door Troubleshooting Repairs cont 5546 273 GB ...
Страница 90: ...90 D C Q R S V K X P F J U T X Q S T R D Y W Type BWC 351 A07 Troubleshooting Repairs cont 5546 273 GB ...