THERMA V Split Type
5. Wiring diagrams
10
DHW Tank Integrated Unit
Element
Marks
Connecting Terminals Description
X1 L1, L2, L3, N, PE Power cable
X2
A5, GND Temperature sensor for external temperature
Q11, N Cooling valve
Q12, N, PE Additional external source
X3
Q7, N, PE Circulation pump of heating cycle 1 (optional)
Q8, N, PE Circulation pump of heating cycle 2 (optional)
N, Q9+, Q10- Mixing valve of heating cycle 2 (optional)
A7, GND Temperature sensor of mixing-heating cycle 2 (optional)
X4
D8, GND Switch heating/cooling and/or PV signal (optional)
D7, GND Thermostat of heating cycle 2 (optional)
D6, GND Thermostat of heating cycle 1 (optional)
D5, GND Remote on/off (optional)
X5 BUS-A, BUS-B, GND, 10 V Communication with the ODU
X6 A+, B-, 12 V, GND Communication spatial corrector (optional)
X7 A+, B-, 12 V, GND Communication with expansion unit (optional)
1 - Flow electrical heater
2 - Tree way valve for switching between heating and DHW
3 - Basic input/output module MD1
4 D4 Flow switch
5
- Web module (OPTIONAL)
TW Modbus Communication with PLC
TX Modbus Not in use
Ethernet Internet connection
6 A6 Temperature sensor of the supply pipe
7 Q3 Main circulation pump
8 A1 Temperature sensor of the return line
9
- Process module - PLC
WM Communication with the Web module
TEX MODBUS communication with the ODU
TS Communication with the spatial corrector
TE2 Communication with the basic module MD1
RQ1 ALARM dry contact
RQ2 RESET dry contact
10
- Power supply ~ 230 V / 12 V
L Phase 230 V 50 Hz
N Neutral 230 V 50 Hz
- Protective earth
V- GND
V+ 12 V dc
11 A3 Temperature sensor refrigerant pipe - condenser inlet.
12 A4 Temperature sensor refrigerant pipe - condenser outlet.
13 - Membrane Keyboard
14 A2 Temperature sensor of DHW
C - Electrical contactor of the electrical heater
TV - Thermal protection of the electrical heater
RC - RC Filter.
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