Ariston Heaters Descaling, Replacement of Parts, Refill tank with water before restoring power

Descaling	Scale deposits can affect the heating capability of the element.
the heating	Heavy scale can even cause the element to burn out. The element can be descaled
Element	either chemically or manually:
	A) Soak the element in white vinegar or other descaling solution, (do not soak the
	rubber gasket). Once descaled, rinse well with fresh water, to which you should
	add some baking soda, OR
	B) Once the element has dried up, use a soft brush (non metallic to prevent damag-
	ing the stainless steel sheath) on element. Brush the dried mineral off. Reinstall the
	element with gasket and make the wire connections.
	C) Replace anode rod if considerably shorter then diagram (letter N, Fig. 3-2).

Warning: make sure the tank has been refilled with water before restoring power.

REPLACEMENT OF PARTS

Changing The anode rod (letter N, Fig. 3-2) helps protect the tank against corrosion. Depend-

the anode ing on the water condition,the magnesium anode rod may need to be changed every

rodyear or so. Galvanic and electrolytic corrosion can destroy a tank if the anode rod is "spent". Rusty water is usually an indication of a "spent" anode rod. If rusty water is present, examine anode rod immediately. Rapid degradation of the anode rod (less than 1 year) may indicate the presence of galvanic corrosion due to "stray" direct current. In this case, it may be necessary to add a "grounding strap" from the Ariston tank to the copper plumbing.

1.Unplug the power and drain the heater (see previous section).

2.Remove the heating element (see previous section).

3.Replace anode rod.

4.Refill tank with water before restoring power.

Changing 1.Unplug and drain the heater (see previous section).

the heating 2.Remove the heating element (see section on Removing the Heating Element).

element 3.Remove and reuse anode rod if not "spent". Best to replace it.

4.Install new element with anode rod attached and rubber gasket, making sure the gasket and element are positioned correctly. Tighten the retaining nut and make the wire connections.

5. Refill tank with water before restoring power.

Changing 1.Disconnect power supply.

the2.Disconnect the 2 push/pull type wires on thermostat (Fig. 3-5)

thermostat 3.Loosen the two brass screws at right side of thermostat and pull wires out.

4.Unscrew and remove the two phillips screws holding the thermostat down.

5.Install new thermostat and re-attach wiring and screws.

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