ELWA
®
Assembly- and Operation Manual, 170504 4
Electrical Connection
1. Earth (ground) the storage tank according to local regulations.
2. Connect Earth (ground) wire to the grounding screw of the device with a minimum wire
section of 1.5mm² (AWG15). Test the ground conductor resistance according to the local
regulations (Protection Class 1):
3. Make sure that the device is switched off.
4. Connect MC4 DC wires with correct polarity. Wrong polarity does not cause any damage,
but the device will not work.
5. Connect AC plug if boost backup heating is desired.
Electrical Connection Stratification Charge
1. Earth (ground) the storage tank according to local regulations.
2. Connect Earth (ground) wire to the grounding screws of both devices with a minimum wire
section of 1.5mm² (AWG15). Test the ground conductor resistance according to the local
regulations (Protection Class 1) (see above).
3. Make sure that both devices are switched off.
4. Connect DC wires as shown below:
5. Connect MC4 DC wires with correct polarity. Wrong polarity does not cause any damage,
but the device will not work.
6. Connect AC plug of the upper ELWA if boost backup heating is desired.
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