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UN-LIME
®
delimer. Do not use muriatic or hydrochloric acid base
deliming solutions to remove lime scale from the elements.
THE PROCESS FOR LIME SCALE REMOVAL IS AS FOLLOWS:
1.
Turn off electrical disconnect switch.
2.
Drain the heater following DRAINING instructions.
3.
Open front panel.
4.
Disconnect the element wiring. Try not to disturb the wiring
unnecessarily and reconnection will be easier.
5.
Unscrew each element.
6.
Remove the elements and gaskets from the openings.
• Use a twisting, pulling action to remove elements
scaled beyond the size of the tank openings.
• Brush loose scale from elements.
7.
Lime scale removal:
• Place limed ends of heating elements into UN-LIME
delimer and allow scale to dissolve. Do not permit de-
limer or water to contact heating element electrical ter-
minals.
• Silicates, sulfates, and aluminates must be removed
by scraping or other mechanical means. Lime scale
dissolvents will not remove these types of scale which
are occasionally encountered.
Call the manufacturer to purchase UN-LIME and heating element
gaskets.
OTHER SCALE REMOVAL:
1.
Flush cleaned ends of elements with water when deliming or
cleaning is completed.
2.
Remove sediment and scale from the tank bottom through
the access provided by the element openings or drain valve
opening.
The cold water inlet valve and drain valve may be opened
to aid the cleanout process.
3.
Clean remaining gasket material from tank and element
flanges. Don not reuse original element gaskets.
4.
Put new gaskets on each element and install into tank
openings.
5.
Attach element wires to connection points from which they
were removed.
6.
Follow FILLING instructions to restore hot water service.
• Check for water leaks around elements and proper op-
eration when heater is filled.
• Close the panel.
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