37
Terminals
Function
Explanation
Note
■
No parameters need to be set
■
The compressor is "forced" off as soon as the contact
opens.
■
The power-OFF contact signal switches off the supply
voltage to the relevant function components, subject
to power supply utility.
■
For the instantaneous heating water heater, the
stages to be switched off can be selected (parameter
"Output for 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 combined in a single 5-core cable.
■
Further information on power-OFF: See chapter
"Power supply".
In connection with Smart Grid:
Do
not
connect the power-OFF signal.
Do
not
remove jumper.
X3.8
X3.9
Frost stat and/or contact humidistat,
cooling
or
Jumper
Requires floating
N/C
contact:
■
Closed: Continuous safety chain
■
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 instal-
led.
X3.18
X2.1
X1.1
Heat pump control unit power supply
230 V~
See chapter "Power supply".
Internal unit: Controller and sensor PCB (LV connections)
Set the required parameters during commissioning:
See from page 57.
Plug
Sensor
Type
F0.1/F0.2
Outside temperature sensor
NTC 10 k
Ω
F0.2/F0.3
Radio clock receiver (accessories)
DCF
F4
Buffer temperature sensor
NTC 10 k
Ω
F11
Contact humidistat 24 V
–
Note
If a 230 V~ contact humidistat (connection to X3.8/X3.9) is used for cooling,
insert a jumper
, otherwise the heat pump will not start (message
"CA Pro-
tectn device primry"
).
―
F13
Flow temperature sensor, system (downstream of heating water buffer cylin-
der)
NTC 10 k
Ω
F14
Flow temperature sensor, cooling circuit (heating circuit without mixer A1/HC1
or separate cooling circuit SKK)
NTC 10 k
Ω
Installation sequence
Electrical connection
(cont.)
5700 582 GB
Installation
