Heating Elements; Anode Rod; Water Heater Sounds; Sediment Build-Up - Bosch TRONIC 5000T ES30M Installation Manual

11.3 Heating Elements

The electric elements are mounted inside the tank to transfer heat directly into the
water. These electric elements can become laden with lime and mineral deposits
that reduce their eff ectiveness or cause them to overheat and short out.
At least once a year check the Heating Elements and if they are coated with calcium,
clean them using white vinegar and a stiff bristle brush.
Figure 9 Heating Element with Mineral Deposits
To replace an element, DISCONNECT POWER to the water heater, drain tank and
replace element. 1 1 /2 screw-type element wrenches are available from most
supply houses. Do not over tighten new element, as this will cause distortion of the
new element gasket. Fill tank with water, opening hot water faucet(s) to allow air
to escape from the system while tank is fi lling. The heating elements will burn out
if not immersed in water. Check for leaks before closing door panel or turning on
power.
WARNING: HAZARDOUS VOLTAGE
 Removal and replacement of the heating elements involves
the disconnection of electrical wiring. These procedures
must only be performed by a qualifi ed service technician.
Bosch Tronic 5000T Electric Water Heaters- BTC 724001301 A (10.2021)

11.4 Anode Rod

The anode rode is a sacrifi cial metal rod that avoids corrosion and premature failure
(leaks) in the tank. It is a consumable item. The anode rod will need to be replaced
before it is depleted. Inspect the anode rod after the fi rst six months of operation
when you drain and fl ush the tank. Replace the anode rod if it's substantially worn
out or has depleted. Thereafter, inspect the anode rod annually or more frequently
if needed. If you use a water softener, your anode rod will deplete faster than
normal and as such would need more frequent inspection.
NOTICE: WARRANTY EXCLUSION
 Damages or malfunction caused by lack of anode
maintenance are not covered by the warranty.
New Anode Rod
Partially Depleted Anode
Completely Depleted Anode
Figure 10
To inspect or replace the anode rod, put a hose to the tank's drain valve and let out
a few gallons of water. Next, fi t a 1 1/16-inch socket onto the rod's hex head on top
of the heater (or under its top plate) and unscrew the rod. If it's less than ½ inch
thick or coated with calcium, buy a new one, wrap its threads with Tefl on tape, put
it back in the tank, and tighten securely.
Certain water conditions will cause a reaction between this rod and the water
heater, potentially causing smelly water. The parts list includes a special anode
for such cases in which the water has a diff erent odor or discoloration due to this
reaction. A water conditioning company might have to be contacted to supply
fi ltration equipment if the issue persists.

11.5 Water Heater Sounds

Possible noises due to expansion and contraction of some metal parts during
periods of heat-up and cool-down do not represent harmful or dangerous
conditions. Sediment build-up in the tank bottom will create varying amounts of
noise and should be addressed.

11.6 Sediment Build-Up

Sediment build-up in the tank bottom may result in amounts of noise and may cause
premature tank failure. In order to ensure the effi ciency and long life of your water
heater we recommend to:
 Drain your water heater every six months.
 Monthly in hard water areas (hardness 7 grains – 120 mg/L or above)
With this operation, sediment build-up and scale is removed. If not, large scale
stones will form and aff ect your water heater effi ciency.
Installation Manual
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