All gaskets on disassembled
clean-out openings must be
replaced with new gaskets on re-assembly.
Gaskets are available from your distributor.
Scale accumulation in the bottom of the storage
tank may be removed by turning off main power
and draining the tank. Once all water is removed,
the hand hole access can be removed. This will
allow large accumulations of scale to be cleaned
from the bottom of the tank.
Water scale accumulations on the immersion
heating element reduce the ability of the elements
to heat water and may cause noise to occur during
operation. It is recommended that a heating
element be removed at least once a year for
examination. If it is scaled, all of the elements
should be removed and cleaned. The element
gasket must be replaced when the element is
removed for cleaning.
Small accumulations of lime scale may be
removed with a stiff bristle brush. Severe
accumulations of lime scale should be removed
by dissolving the accumulation in a commercial
delimer. Do not use muratic or hydrochloric acid
base deliming solutions to remove lime scale
from the elements.
Do not pour delimer into
tank. Deliming solutions may damage the
glass lined interior of the tank
1. Drain the heater following “SHUTDOWN
PROCEDURE” instructions.
2. On some high kW input models it is necessary
to remove a side panel to gain access to the
exposed ends of the elements which are not
accessible through the front element access door.
3. Disconnect the wires attached to the element
terminals. Try not to disturb the wiring
unnecessarily and reconnection will be easier.
4. Loosen the screw-in element flange with a
socket and breaker bar. Do not use an impact
gun (air or electric) to remove the element
flanges from the tank. Mark the location of
each element in the tank openings so they may
be returned to their original position.
5. Remove the elements from the opening with a
twisting, pulling action if the elements are
scaled beyond the size of the tank flange
openings. Brush loose scale from elements.
6. Place scaled ends of heating elements into a
delimer solution and allow scale to dissolve.
Do not permit delimer or water to contact
heating element electrical terminals.
7. Flush clean ends of elements with water when
deliming or cleaning is completed.
8. Clean remaining gasket recess on each
screw-in element flange. Do not reuse
element gaskets.
9. Install a new gasket on each element. Install
element into the tank opening where it was
originally installed. Tighten the flange with
the socket and breaker bar used to remove
the element.
10. Attach wires to element terminals from which
they were removed.
11. Follow “FILLING THE WATER HEATER”
instructions to restore hot water service.
Check for water leaks around elements and
proper operation when heater is filled.
26
NOTE:
Keep all delimers away from anode rods to
prevent the formation of flammable and
explosive gas.
DANGER:
