How to replace your geyser heating element by a Geyserwise PTC element

Installing a Geyserwise PTC element saves you the cost of having to retrofit an additional system such as a solar geyser or a heat pump - no extra installation and maintenance, just a change of the geyser heating element.
Geyserwise PTC element
Just a note - ONLY replace your own element if you are familiar with the functions and dangers of electricity.

These PTC elements are generally very reliable and long lasting. PTC elements such as the ones sold by GEYSERWISE present some real benefits compared to traditional resistive heating elements:
  • Saves you up to 15% electricity
  • Safer operation thanks to the self-limiting temperature characteristics of PTC technology used in the element
  • Dry burn tolerant: can operate in dry air without overheating

This PTC element can be fitted on the following geysers:

Tecron, Duratherm, City Heat, Franke, GAP, Heat Tech, Kwikot and Xstream.

Each type of geyser may require a different flange and sensor tube. You can find more details for each geyser brand retrofit on the EcoDepot website.

How to replace your geyser heating element by a Geyserwise PTC element

What you will need:

  • PTC element
  • Flange and sensor tube
  • Portable screwdriver
  • Size 10 allen key

Step 1:
Switch off the power supply by the isolator switch (this should be within 1 meter of your geyser) and switch off the geyser switch at the distribution board (db).

Turn off isolator switch of geyser
Turn off geyser switch at distribution board

Step 2:
Turn off the stop cock, this will turn off the water supply inlet feeding your geyser. If you don't have one close to your geyser, switch off the mains.

Turn off stop cock

Step 3:
Drain the geyser. There is a drain cock to drain your geyser, but if you can't find/access it, you can drain it using a standard pipe.

Drain geyser using a standard pipe

Step 4:
Remove the lid and loosen the screws to disconnect the existing element and thermostat, by removing the wires (phase, neutral, earth).

Remove lid of geyser
Disconnect wires of geyser

Step 5:
Remove the flange plate and flange rubber gasket, and replace it with the new flange and rubber gasket. Then, tighten the nuts.

Remove existing flange
New flange for geyser
Tighten new flange

Step 6:
Use a geyser element spanner to screw the element and the fiber joint, tighten it fully to prevent any leakages. Then insert the sensor tube.

Insert the new PTC geyserwise element
Fiber joint to tighten PTC element
Insert new sensor tube
Tighten new sensor tube

Step 7:
Insert the sleeve of the thermostat and tighten with an allen key (size 10). When it is fully tightened, connect the thermostat and the element.

Insert thermostat sleeve

Step 8:
Connect the phase (red wire) from the insulator switch to the left side of the thermostat. Also connect the phase of the element (red wire) to the right side of the thermostat.

Connect wires to thermostat
Connect wires to thermostat
Connect wires to thermostat
Connect wires to thermostat

Step 9:
Connect the black wire of the element (neutral wire) by the connector block to the neutral wire coming from your isolator switch.

Connect wires to thermostat
Connector block
Connector block

Step 10:
Connect the green and yellow wires (earth) to the new flange.

Connect earth wires to flange

Step 10:
Screw the lid back on (ensure the isolator switch is turned off).

Screw lid back on

Step 11:
Turn the hot water tap on.

Turn hot water on

Step 12:
Turn on the water supply of the geyser to fill it up. Air will come out of your tap. When the water comes out, turn it off. Check for any leaks around your geyser.

Turn hot water off

Step 13:
Switch on isolator switch and geyser switch at the db.

Geyser switch on

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