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5. Test the System
These tests are designed to verify that only excess generation is used by the Solar
. Installers must check that increased energy consumption in the home results
in less energy being supplied into the immersion heater. This is indicated in the ‘Heating
by Solar’ display. The availability of high energy appliances (e.g. kettle, electric showers
etc.) are useful during these tests.
Before testing, if “Tank Hot” displays, run off some hot water.
Perform tests 1, 2 and 4. When there is no PV generation, perform tests 3 and 4 .
Test 1
When sufficient excess generation is available and “Heating by Solar” is displayed,
check that the Solar stops diverting energy when the PV system is off.
Shutdown the PV array and the display changes to “Water Heating OFF.”
Reinstate the PV array.
Test 2
When the PV generation is above 100W, check that switching off appliances in the
home results in greater energy diversion by the Solar unit.
Shut down all the MCB’s / Fuses except for the PV and immersion.
Check the level of PV generation on the inverter.
The “Heating by Solar” level should be approximately 100W less than generation.
Reinstate MCB’s / Fuses.
NB. If no reading is possible from the inverter a reduction in “Heating by Solar”
value or “Water Heating OFF” should be seen after the MCB’s / Fuses have been
reinstated, switch on a high energy appliance if necessary.
Test 3
At times when no PV generation is available (e.g. commissioning after dark) test the
installation by simulating export energy, achieved by reversing the orientation of the
Measurement Clamp.
Shut down the PV array
Reverse the orientation of the measurement clamp (consumption in the home is then
measured as export energy)
Switch on a kettle or high energy device
Whilst the kettle is on “Heating by Solar” is displayed and Solar function is
proved.
IMPORTANT! Return the clamp to its correct operating position and reinstate the
PV array.
Test 4
Test the boost function is operational.
Press the Boost button 2 times, “Manual Boost ON” displays
Check that water is heating
Scroll the Boost button until it reads “Manual Boost OFF”
