Wolf MGK-2-390 Installation Instructions Manual page 29

Boiler connection (230 V/400 V):
The control, regulating and safety equipment are fully wired and tested.
You only need to connect the power supply, the heating circuit pump and the external accessories.
Create a permanent connection for the power supply.
Provide the power supply via a mains isolator (e.g. heating emergency stop switch) that ensures at least 3 mm contact separation
for all poles.
Installation information, electrical connection, mains
- Isolate the system from the power supply before opening.
- Check that the appliance is isolated from the power supply.
- Open the front casing and the cover of the control unit.
- Open the upper cable conduit and the lower casing cover of the HCM-2.
- Ensure separation of the LV and ELV side.
- Strip approx. 70 mm insulation off the power cable.
- Depending on the heating circuit pump used (230 V/400 V), lay a
3-core or 5-core power cable through the strain relief on the right hand
side of the appliance and in the cable conduit to the series terminals.
- Terminate wires at the series terminals as shown in the wiring diagram.
Leave the wires for the earth conductor gr/ye approx. 10 mm longer
than those for L (L1, L2, L3) and N.
- Close the cable conduits and the cover of the control unit.
Installation information, electrical connection, heating
circuit pump
- Isolate the system from the power supply before opening.
- Check that the appliance is isolated from the power supply.
- Open the front casing and the cover of the control unit.
- Open the upper cable conduit and the lower casing cover of the
HCM-2.
- Ensure separation of the LV and ELV side.
- Strip approx. 70 mm insulation off the power cable.
- Depending on the heating circuit pump used (230 V/400 V), lay a
3-core or 5-core power cable for the heating circuit pump through
the strain relief on the right hand side of the appliance and in the
upper cable conduit to the series terminals.
- Ensure separation of the LV and ELV side.
- Terminate wires accordingly at terminals X1-L1/L2/L3/N/PE. Leave
the wires for the earth conductor gr/ye approx. 10 mm longer than
those for L (L1, L2, L3) and N.
- When using a variable speed pump, route the signal line through
the lower cable conduit.
PWM-controlled pumps must be connected to terminals X2-3 and
X2-2(GND). Connect pumps with a 0-10 V control to X2-1 and
X2-2.
- Close the cable conduits and the cover of the control unit.
Connection output A1 (230 V AC; max. 1.5 A) *
Insert and secure the connecting cable through the cable gland.
Connect the connecting cable to terminals L1, N and
The parameters for output A1 are described in the table.
* Max. 1.5 A / 345 VA per output, no more than 600 VA in
total for all outputs
3063772_201507
18. Electrical connection
.
Fig: Connection output A1
Fig: Mains connection
F1
F1
Fig: Connection, heating circuit pump
PE
N
L3
L2
L1
PE
N
L3
L2
L1
PE 5
4
N
3
L3
2
L2
L1
1
PE
N
L3
L2
L1
X1
5
4
UPM PWM
3
GND
2
UPM 0-10 V
1
X2
29