46
Terminals Function
Explanation
X3.8
X3.9
Frost stat and/or contact
humidistat
or
Jumper
Requires zero volt
N/C
contact:
■ Closed: Continuous safety chain
■ Open: Safety chain interrupted; heat
pump shut down
■ Breaking capacity 230 V~, 0.15 A
■ Remove jumper when connecting.
■ Connected in series, if both safety com-
ponents are installed.
X3.18
X2.1
X1.1
Heat pump control unit
power supply 230 V~
See chapter "Power supply".
Internal unit: Controller and sensor PCB (sensors)
Set the required parameters during com-
missioning; see from page 76.
Plug
Sensor
Type
F0.1/F0.2
Outside temperature sensor
NTC 10 kΩ
F0.2/F0.3
Radio clock receiver (accessories)
DCF
F4
Buffer temperature sensor
NTC 10 kΩ
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
"Protectn device primry").
―
F13
System flow temperature sensor (downstream of
heating water buffer cylinder)
NTC 10 kΩ
F14
Flow temperature sensor, cooling circuit (heating
circuit without mixer A1/HC1 or separate cooling
circuit SKK)
NTC 10 kΩ
F16
Room temperature sensor for separate cooling
circuit SKK (required) or for heating/cooling cir-
cuit without mixer A1/HC1 (recommended)
NTC 10 kΩ
Installation sequence
Electrical connections
(cont.)
5782 201 GB