What to do when you need to replace or service a geyser with an Elon® 100 connected.
This page provides step-by-step instructions for plumbers on how to disconnect, reconnect and recommission an Elon® 100 solar PV water heater connected to a standard electric geyser.
For example, you might need to replace or service the geyser, and need to disconnect the Elon® 100 unit for this purpose.
(Click here for the full installation manual.)
Elon® 100 wiring diagram
Here is the wiring diagram for the Elon® 100. Please note that the element and thermostat are each wired SEPARATELY to the Elon® 100.
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Disconnecting the Elon® 100 from the geyser
STEPS TO DISCONNECT THE ELON® 100 FROM THE GEYSER
- Switch off the geyser circuit breaker in the main DB board.
- Switch off both the AC isolator and DC circuit breaker or isolator.
- Remove the geyser cover.
- Pull out the green element adapter and thermostat from the element by pulling on the element adapter (see the photo). No need to disconnect any of the wires.
- You can now replace or service the geyser.
Step 3. Pull out the green element adapter and thermostat from the element by pulling on the element adapter.
Reconnecting the Elon® 100 to the geyser
STEPS TO RECONNECT THE ELON® 100 TO THE GEYSER
- Plug the element adapter with thermostat (and with wires still attached) back into the element (see photo). IMPORTANT: Please make very sure that the two male terminals of the green element adapter both seat properly into the element female terminals. Tug on it to make sure both fit snugly.
- Replace the geyser cover.
- Turn the Elon® controller dial to setting “Solar Only”.
- Switch on both the AC isolator and DC circuit breaker or isolator.
- Switch on the geyser circuit breaker in the main DB board.
- You are now ready to recommission the Elon® 100 (see the next section).
Step 1. Plug the element adapter with thermostat back into the element.
Recommissioning the Elon® 100
STEPS TO RECOMMISSION THE ELON® 100 SOLAR PV WATER HEATER
- Check that the Elon® is operational by checking that at least one light is flashing or on (see diagram below).
- Confirm solar PV array supply voltage and DC power to geyser when thermostat is closed. The green light should be flashing. The Elon® 100 will switch DC power to the geyser approximately 10 to 15 seconds after DC power to the Elon® has been switched on (if there is enough sunlight). (If thermostat is not closed, open hot water tap in house until thermostat closes.).
- Test mains power supply by turning the dial to “MAINS ONLY”. The red light should start flashing (except if geyser is already at thermostat setpoint temperature). NOTE THAT THE ELON® WILL ONLY SWITCH TO MAINS 5 MINUTES AFTER MAINS POWER SWITCH-ON OR RECONNECTION. This is to allow grid power to stabilize after a power failure.
- Confirm that no power is supplied to geyser element when thermostat is open (turn thermostat set point to lowest temperature setting – you should hear an audible click when the thermostat opens).
- Set thermostat back at desired temperature (60 °C maximum).
- Set the controller to setting “3” or other setting as per customer preference.
You can download a commissioning checklist from this page.
You can download a commissioning checklist from this page.
What the Elon® 100 controller lights tell you
