Eccotemp EM-2.5 Installation And Operating Instruction Manual - page 14
DESCALING THE HEATING ELEMENT:
Scale deposits can affect the heating capability of the element. Heavy
scale can even cause the element to burn out. The element can be
descaled chemically or manually.
1. Remove the heating element (see page 11).
2. To descale chemically, soak the heating element in white vinegar
or other descaling solution and then rinse well with fresh water.
3. To descale manually, let element dry and then using a non metallic
brush similar to a tooth brush; brush the residue from the element.
Avoid damaging the surface of the element.
4. Reinstall the element and gasket.
5. Refill tank with water before turning on the power to the
water heater.
REPLACING THE HEATING ELEMENT:
1. Unplug and drain the water heater (see page 11).
2. Remove heating element noting original positions of all connections.
3. Install new element with gasket making sure the new element and
gasket are positioned correctly.
4. Tighten retaining nuts and make the wire connections to their
original locations.
CHANGING THE THERMOSTAT:
1. Turn off the power switch and unplug the water heater from the
electric outlet.
2. Drain and remove the water heater. (see page 11)
3. Remove screws retaining the bottom panel of the water heater and
remove the panel.
4. Remove thermostat knob and unscrew two retaining screws.
It may be necessary to pry the knob off of the thermostat spindle.
Now remove front panel.
5. Disconnect the push-pull wire connectors on the thermostat noting
which connector goes to which terminal. Terminals are marked.
6. Remove the thermostat probe from the well.
7. Install new thermostat, attach wires and tighten screws.
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