37
Terminals
Function
Explanation
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 58.
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
F16
Room temperature sensor, cooling circuit
■
Required for separate cooling circuit SKK
■
Recommended for heating/cooling circuit without mixer A1/HC1
NTC 10 k
Ω
aVG
KM BUS (wires interchangeable)
Use the KM BUS distributor (accessories) if several devices are connected.
KM BUS subscriber (examples):
■
Extension kit, mixer for heating circuit M2/HC2
■
Remote control Vitotrol 200A or Vitotrol 300B (set the heating circuit assign-
ment at the remote control)
■
EA1 extension, AM1 extension
■
Communication interface Vitocom 100, type GSM2
—
sVA
Modbus 2 (wires
not
interchangeable)
Connection for electricity meter of photovoltaic system
—
J3
Jumper for terminator Modbus 2
Terminator enabled (delivered condition)
Terminator disabled
—
J4
Jumper for setting master/slave Modbus 2
Heat pump control unit is slave
Heat pump control unit is master (delivered condition)
—
Installation sequence
Electrical connection
(cont.)
5700 562 GB
Installation
