ELWA
®
Assembly- and Operation Manual, 170504 6
This function is designed for the additional heating of the hot water during summer
for private applications. For commercial use, especially year-round operation, please
contact my-PV.
AC target temperature is factory preset to 50°C. See next chapter to change.
The next boost backup cycle starts in the afternoon of the next day. If a manual reheat is
required (e.g. in the evening), simply switch the device off and on again. This activates the boost
backup cycle.
Remark: If you first connect DC it takes several minutes to start-up the device (LED green
flashing)
1. Set rotary knob to desired solar target temperature
2. Switch on main switch (Device starts operating several minutes after the DC has been
connected and solar power is available)
3. Device returns to normal operation LED yellow on if solar powered,
LED yellow flashes if backup powered
4. If target temperature reached Device switches off, LED green on
Adjusting the boost backup target temperature
(factory preset to 50 °C)
1. Switch off main switch
2. Adjust rotary knop to „spanner“ position (far left)
3. Switch on main switch all 3 LEDs flash (Setup Mode)
4. Set rotary knob to desired reheat temperature
LEDs flash alternately red/green and yellow
5. Switch off main switch backup temperature is saved
6. Set rotary knob to desired solar target temperature
7. Switch on main switch Device returns to normal operation
Stratification Charge with two ELWAs
ELWA is factory preset to operate as a single device or as an upper device in stratification
charge mode.
The lower ELWA has to be set as follows:
1. Switch off main switch
2. Adjust rotary knop to „spanner“ position (far left)
3. Switch on main switch all 3 LEDs flash (Setup Mode)
4. Adjust rotary knop to position
LEDs run from top to bottom
5. Switch off main switch Setting is saved
6. Set rotary knob to desired solar target temperature
7. Switch on main switch Device is in standby mode (green LED flashing) until
activated by upper device
This setting can be reversed by following the above procedure by setting to symbol.
Error Displays
The red LED indicates different error conditions by flashing:
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