Replacement Of Parts - Ariston GL 2.5 User Manual

1. Turn off power supply and drain the heater (see previous section).
Removing
2. Remove the front cover plate, disconnect terminals X, Y and T (fig. 3/2).
the heating
3. Unscrew the 4 heating element retaining nuts F (fig. 3/2).
element
4. Remove the element. G (fig. 5/1).
G
Descaling
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
the heating
either chemically or manually:
element
A) Soak the element in white vinegar or other descaling solution. Once descaled,
B) Once the element has dried up, use a soft brush (non metallic to prevent damaging
C) Replace anode rod (N Fig. 5/2) if it is noticeably deteriorated or considerably
WARNING: make sure the tank has been refilled with water before restoring power.

REPLACEMENT OF PARTS

Changing
The anode rod (N fig. 5/2) helps protect the tank against corrosion. Depending on the
water condition, the magnesium anode rod may need to be changed every year or so.
the anode
Galvanic and electrolytic corrosion can destroy a tank if the anode rod is "spent".
rod
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. Turn off the power supply and drain the heater (see Draining the Heater).
2. Remove heating element (see previous section).
3. Remove and replace the anode rod N Fig. 5/2.
4. Refill tank with water before restoring power.
8
FIG. 5/1
rinse well with fresh water, to which you should add some baking soda, OR
the stainless steel sheath) on element. Brush the dried mineral off. Reinstall the
element with gasket and make the wire connections.
shorter then seen in figure 5/2.
N
FIG. 5/2