59
Clamps
Function
Explanation
201XD3
1: Start command EB
2: Start command EB
3: Set value 0-10 V
4: GND
5: Operating message COM
6: Operating message NO
Circulation pump control sig-
nals, heat exchanger, de-
frosting, residual heat, water
Floating N/O contact:
Closed: Demand, circulation pump heat ex-
changer defrosting, residual heat, water
Open:
No demand
Signal 0 to 10 V
Contact closed:
Circulation pump operation, heat exchanger de-
frosting, residual heat, water
301XD1
1: 24 VDC
2: 0 VDC
Stem heater, 2-way motor-
ised damper primary circuit
Connection values
■
Voltage: 24 VDC
■
Max. switching current: 5 A
301XD2
1: 24 VDC
2: 0 VDC
Stem heater
2-way motorised damper, pri-
mary circuit cooling
Connection values
■
Voltage: 24 VDC
■
Max. switching current: 5 A
301XD3
1: 24 VDC
2: 0 VDC
Stem heater, 3-way mixer,
low temperature mainte-
nance/frost protection
Connection values
■
Voltage: 24 VDC
■
Max. switching current: 5 A
380XD3
1: Start command EB
2: Start command EB
Air/brine heat exchanger
control signals
Floating N/O contact:
Closed: Demand, air/brine heat exchanger
Open:
No demand
Connection values:
■
Max. voltage: 250 V~
■
Max. switching current: 5 A (AC1)
(connection air/brine heat exchanger
terminal 1, 2)
380XD4
1: Set value 0-10 V
2: GND
Air/brine heat exchanger
control signals
Signal 0 to 10 V
Connection air/brine heat exchanger terminal
X_CTRL
3: GND
4: Set value 0-10 V
380XD5
1: Operating message COM
2: Operating message NO
Air/brine heat exchanger
control signals
Closed: Operation, air/brine heat exchanger
Connection air/brine heat exchanger terminal
X_CTRL
1: COM
2: NO
380XD5
1: Brine sensor COM
2: Brine sensor NO
Brine sensor drip pan air/
brine heat exchanger
Potential 24 VDC from heat pump
Open: Fault
Insert jumper if not installed.
433XD1
1: Valve open
2: Valve closed
3: 24 VDC
4: 0 VDC
PE: Earth conductor
2-way motorised damper,
heat exchanger defrosting,
residual heat, water
Connection values
■
Voltage: 24 VDC
■
Max. switching current: 5 A
434XD1
1: Valve open
2: Valve closed
3: 24 VDC
4: 0 VDC
PE: Earth conductor
2-way motorised damper,
heating water buffer cylinder
outlet
Connection values
■
Voltage: 24 VDC
■
Max. switching current: 5 A
Installation procedure, hydraulic module defrost box
Electrical connections
(cont.)
5837251
Service